OKEANOS SWIMMING POOL AIR HANDLING UNITS

Transcription

1 S info@vbw.pl v ul. Chwaszczyńska 133 D Gdynia Polska/Poland

2 ABLE OF CONENS General product information... 4 Construction of the air handling unit... 5 Components... 5 Damper... 6 Pocket filter... 6 Water heater... 6 Condenser/Evaporator... 6 ixing chamber... 7 Cross-flow exchanger... 7 Double cross-flow heat exchanger... 8 ube heat exchanger... 8 Fan units... 9 Cooling system operating in the heat pump mode Cooling system operation Reversible assembly Standard equipment Special-purpose assembly of the unit arking air handling units arking of automation systems Design guidelines Swimming pool air handling units with double-stage heat recovery Principle of operation of swimming pool air handling units ode of operation of an air handling unit with two-stage heat recovery Choosing air handling unit size BS-RP-..-SW BS-2RP-...-SW BS-HP-...-SW he principle of operation of automatic control and measurement systems in swimming pool air handling units with double-stage heat recovery Diagram of automation system for air handling units with two-stage heat recovery with belt-driven fans...36 Diagram of automation system for air handling units with two-stage heat recovery with direct drive fans Compact swimming pool air handling units Air handling unit of the BO-HP-...-SW type Air handling unit of the BO-HP-RHP-...-SW type

3 Swimming pool air handling units with triple-stage heat recovery Choosing air handling unit size Swimming pool air-conditioning unit of the BS-HP-RHP-...-SW Principle of operation of the device Diagram of the automatic control and measurement system for air handling units with triple-stage heat recovery, fitted with belt-driven fans Diagram of the automatic control and measurement system for air handling units with triple-stage heat recovery, fitted with direct driven fans Swimming pool air handling unit of the BS-RP-RHP-...-SW type Principle of operation of the device Diagram of the automatic control and measurement system for air handling units with triple-stage heat recovery, fitted with belt-driven fans Diagram of the automatic control and measurement system for air handling units with triple-stage heat recovery, fitted with direct driven fans Access to equipment ransport, installation, service he manufacturer reserves its rights to introduce changes 3

4 GENERAL PRODUC INFORAION Okeanos air handling units are air supply and air exhaust equipment for ventilation, dehumidification and heating of all types of indoor pools halls - private, hotel or other public halls of recreational, sports and healing purposes. Swimming pool air handling units are characterized by a specific air treatment and resistance of materials and components to corrosion and chlorine compounds. Configuration of components and the integrated automation system provides optimum air treatment in swimming pool halls. Air dehumidification is carried out by providing the pool hall with a certain amount of fresh air, allowing assimilation of humidity gain. hanks to air recirculation and the implementation of heat-recovery exchangers in the form of a cross-flow heat exchanger, a heat pipe and a heat pump, the air handling units are energyefficient devices. any years of experience in production of ventilation equipment for ventilation of indoor swimming pools allowed us to create the optimal configuration of these air handling units. his catalogue presents the following: Air handling units with double-stage heat recovery: a) Okeanos BS-RP- -SW (cross-flow heat exchanger and recirculation) b) Okeanos BS-2RP- -SW (double cross-flow heat exchanger and recirculation) c) Okeanos BS-HP- -SW (heat pipe and recirculation) Compact air handling units are manufactured in two sizes, for small private swimming pools, hotel swimming pools and hydrotherapeutic swimming pools a) Okeanos BO-HP- SW with double-stage heat recovery (heat pipe and recirculation) b) Okeanos BO-HP-RHP- SW with triple-stage heat recovery (heat pipe, heat pump and recirculation). Air handling units with triple-stage heat recovery for bigger public swimming pools a) Okeanos BS-HP-RHP- SW (heat pipe, heat pump and recirculation) b) Okeanos BS-RP-RHP- SW (cross-flow heat exchanger, heat pump and recirculation). Okeanos air handling units include a range of 13 sizes with capacities from m 3 /h 4

5 CONSRUCION OF HE AIR HANDLING UNI Well-designed structure and production technology of the Okeanos air handling units ensure that they operate without breakdowns in a more demanding environment than regular air handling units. Okeanos AHUs have to process both fresh air and very humid air that is drawn from a swimming-pool hall and contains aggressive chlorine compounds. he latter requires additional processing, consisting mainly in air dehumidification. he framework air handling unit design consists of aluminium sections and angles that make up the structure to which covers, removable panels and access doors are fitted. he covers consist of external sheet metal (aluzinc) and internal sheet metal (galvanised coated sheet) filled with 50 mm mineral wool. he floor is made of galvanised coated sheet. he fan frames are made of galvanised coated sheet or aluminium sections. he guides of heat exchangers, filters and diaphragm as well as all fasteners are made of galvanised coated sheet. he same type of sheet is used for the housing of the droplet eliminator and bund. he air handling units are placed on a 80 mm frame (up to the unit size 7) and 120 mm frame (from the unit size 7BIS) COPONENS Outside air Air supplied to the pool hall Air extracted from the pool hall Removed air 5

6 OKEANOS air handling units consist of the following components used for treatment, pumping, purifying and adjusting the amount of air: 1 Damper 2 Recirculation damper 3 By-pass damper 4 Flexible connection 5 Droplet eliminator with a tank 6 F5 air filter 7 Heat recovery exchanger a tube heat exchanger (alternatively a cross-flow exchanger) 8 Condenser 9 Evaporator 10 Cooling system 11 Heater 12 Fan unit - axial-radial (or radial fan) 13 Housing 14 Frame Damper Damper housing consists of specially shaped aluminium profiles that provide the necessary rigidity. Aluminium blades, equipped on edges with rubber gasket, are coupled with each other in opposite directions by means of gears made of plastic. Both aluminium alloys and plastic components are characterised by good resistance to chlorine contained in swimming pool air. By standard, the dampers are equipped with automatic servo-motors. Pocket filter Pocket filters are made with synthetic fabric of EU5 class and a frame made of coated sheet, to facilitate mounting and replacing the filter. he whole filter is mounted in the air handling unit by means of special guides that guarantee accurate tightness and easy replacement. Water heater Water heaters consist of a package of aluminium slats and copper tubes. Heater housing is made of galvanized steel; the collectors are made of copper or steel. Heater collectors have additional connections for venting and draining heating medium from the heater. Heating parameter of heaters typically used in the air handling units equals up to 130 C. Condenser/Evaporator he freon exchanger consists of a set of epoxy or aluminium lamellas and copper tubes. he housing is made of galvanized steel. Collectors are made of copper, while the manifold is made of brass. 6

7 ixing chamber he mixing chamber is equipped with dampers, which, due to the pool drying process, allow bringing the required amount of fresh air. he rest of the air is recirculating air, channelled from the exhaust to the air intake and further pumped along with fresh air. he dampers are equipped with automatic servo-motors. Cross-flow exchanger he cross-flow exchanger is made of thin aluminium plates that make up air intake and exhaust ducts. A stream of warm exhaust air from the room flows through every second channel of heat exchanger, heating its plates. he intake air stream flows across through the remaining channels, receiving heat from the heat exchanger plates. Exchanger slats are epoxidized. he degree of achieved efficiency is 70%. Heat recovery through the cross-flow exchanger does not require input of energy from the outside. he exchanger does not have any moving parts, such as engine or bearing, which ensures its long life. o use the heat exchanger all over the year, it is additionally equipped with a double section damper, a stainless steel drip container, a drop separator to retain water droplets taken with air, and a syphon bottle (in bulk), ensuring correct drainage of water from the tub in the course of operation of the air handling unit. he drainage connector for draining water from the container is led out on the opposite side to the operating side. In the air intake part, at the inlet to the heat exchanger, there is a damper consisting of two sections: on the exchanger, and the on the by-pass. Both sections are coupled together so that at the opening of the flow through the heat exchanger, the by-pass is closed. he air flows through the by-pass when the further recovery of heat is undesirable. his occurs during summer, when the outside temperature is equal to or higher than the temperature in the hall, and heat gains are considerable; and in winter - as frost protection, as shown in the following figures. he flow through the heat exchanger is open: Heat recovery By-pass closed he flow through the heat exchanger is closed: By-pass open - in summer and heat exchanger frosting in winter 7

8 Double cross-flow heat exchanger Dual cross-flow exchanger consists of two cross-flow exchangers, arranged in series. Dimensions of the heat exchanger are optimally adapted to the size the air handling unit both in terms of construction and in terms of high efficiency of heat recovery. he achieved efficiency is up to 85%. hanks to the epoxidized slats, the heat exchanger is resistant to corrosion caused by harmful air parameters in swimming pool halls. ube heat exchanger he heat exchanger consists of copper tubes filled with refrigerant in liquid state and aluminium slats. he tube heat exchanger is divided into two parts. Exhausted warm air causes vaporisation of the refrigerant in the lower part of the heat exchanger. In the upper part of the exchanger, the cold outside air causes condensation of the refrigerant vapour and condensate flow downwards under gravity. Exhausted air is cooled; the outside air is warmed up. o protect the heat exchanger against the aggressive action of chlorine compounds, the heat pipe is epoxidized. he heat pipe is additionally equipped with a bypass damper, located inside the air handling unit on the side of the heat exchanger, a stainless steel drip container, a drop separator to retain water droplets taken with air, and a syphon bottle (in bulk), ensuring correct drainage of water from the tub in the course of operation of the air handling unit. he drainage connector for draining water from the container is led out on the opposite side to the operating side. By-pass is used as a frost protection and to adjust the intake air temperature. Heat recovery through the tube heat exchanger does not require input of energy from the outside. An additional advantage of the tube heat exchanger compared to the cross-flow exchanger is that the risk of frosting occurs at lower temperatures than in case of the cross-flow exchanger. he degree of achieved efficiency is 65%. 8

9 he transformation of heat recovery in case of the tube heat exchanger and the cross-flow exchanger is similar, and differs only in recovery efficiency. See the figure below. Heat recovery efficiency t N2 - t N1 = t W1 - t N1 t N2 =t N1 + x (t W1 -t N1 ) Fan units Radial fan. he radial fan unit comprises the following: - fan, - electric motor, - belt drive, - frame made of stainless steel or aluminium profiles. Axial radial fan. he axial radial fan unit comprises the following: - axial radial fan mounted by means of a hub mounted on motor shaft, controlled by an inverter - painted frame. 9

10 he fan outlet is connected to the housing of the air handling unit by means of a flexible plastic connection, and the whole assembly is mounted on the floor of the air handling unit by means of special cushioning chosen individually to match operating parameters. An electric motor supplied with voltage of 3~380 V (50 Hz) of IP54 protection class is used. Sections with the fan unit are equipped with a safety switch, through which power supply is to be connected. his switch cuts off the voltage at the time of maintenance and repair, regardless of the switchbox. he safety switch is located in the field of view of the person operating the fan. Adjusting fan performance can be achieved through: - two-speed motor - two rotational speeds - frequency converter - continuous regulation of the air flow. Cooling system operating in the heat pump mode he cooling assembly of the heat pump consists of the following: a hermetic compressor (or compressors): a screw or piston compressor; an evaporator with epoxidized lamella surface, resistant to the operation of chlorine compounds; an air-cooled condenser of the coolant; a coolant tank with a safety valve; automatic control and measurement system and fittings plus copper pipelines that connect components together. he cooling system with additional components may also comprise: a water-cooled condenser for heating swimming pool water up; a water-cooled condenser for heating tap water up. he heat pump operates as a cooling device and it is used primarily to recover heat. hanks to the implementation of the heat pump, it is possible to recover large amounts of sensible and latent heat, contained in warm and humid exhaust air. In the night mode of operation (recirculation mode), the main task of the heat pump consists in dehumidifying the swimming pool air. In the evaporator, evaporating freon receives heat from the exhaust air. his heat increased by the energy used to drive the compressor is transferred to the supply air in the air-cooled evaporator or to the swimming-pool water or tap water in the water-cooled evaporator. In order to ensure the optimum use of the heat pump operating in the dehumidification mode, only a part of the recirculated air flows through the evaporator. he air is cooled down and dried. hen the air is heated up in the condenser of the heat pump. he remaining part of the air flows through the recirculation damper before the cooler. his mode of operation is used only at night, when the air in a swimming-pool hall is excessively humid. hanks to the implementation of a heat pump as the second stage of heat recovery behind the recuperator, it is possible to use a compressor with lower power, which ensures the same energy performance and the same dehumidification efficiency, while the demand for electric energy to power the compressor drive is reduced, compared to a single-stage heat recovery process realized only by means of a heat pump. 10

11 he figure below shows the heat pump assembly fitted with additional condensers for heating up swimmingpool water and hot tap water. Heat pump assembly fitted with additional condensers for heating up swimming-pool water and hot tap water. Symbols: 1 Compressor 2 Air-cooled condenser (cooled with supply air) 3 Evaporator (cooled with exhaust air) 4 hermostatic expansion valve 5 Cut-off solenoid valves 6 Freon tank 7 Freon steam trap 8 Sight-glass with an indicator of freon humidity 9 Pressure controls that protect the compressor 10 Water-cooled condenser that heats swimming-pool water up (additional equipment) 11 Water-cooled condenser for heating tap water up (additional equipment) Cooling system operation he cooling system operates automatically and it does not need continuous supervision. he heat pump operation boils down to controlling the humidity of the coolant in the installation and the oil level in the compressor. o check these parameters, one has to switch the air handling unit off by cutting power supply off at the control switchgear and to open the inspection shields in the heat pump section. 11

12 Coolant humidity can be checked by means of the humidity sensor installed behind the steam trap. Green colour in the inspection sight-glass means that the coolant is not humid. Yellow colour in the sight-glass indicates the presence of humidity in the coolant. In this case, it is recommended to call the servicing team to inspect the device and remove potential leaks and to replace the steam trap and, if necessary, to fill the installation up with the coolant. he amount of oil in the compressor can be checked in the sight-glass located on the compressor body. he correct oil level is between 1/3 and 2/3 of the sight-glass diameter. If the compressor is switched off during normal operation by the pressure control protecting against overpressure, which is signalled by lighting a control up in the power supply and control switchgear, one should call the servicing team to remove the cause of pressure control activation. Reversible assembly system. he reversible assembly allows the device to realize the function of both a heat pump and a cooling he reversible assembly consist of: heat exchangers of the cooling system (evaporator/condenser with epoxidized lamella surface, resistant to the operation of chlorine compounds) a hermetic compressor (or compressors): a screw or piston compressor a coolant tank with a safety valve automatic control and measurement system and fittings plus copper pipelines that connect components together. he reversible unit of the heat pump is a complete cooling device, designed to cool and dehumidify the supply air in the summer and heat the supply air in the winter. he operation of the reversible heat pump is based on combining the operation of the cooling section and the heat pump section. During summer time, the exchanger on the supply air line functions as a cooler and the one on the exhaust air line - as a heater. During winter time, the exchanger on the supply air line functions as a heater and the one on the exhaust air line - as a cooler. his is possible thanks to the implementation of a four-way solenoid valve and to appropriate arrangement of pipelines, as well as appropriate construction of heat exchanger collector. he fittings of the reversible heat pump unit are analogous to the fittings of a freon cooling unit. Additionally, it is fitted with a four-way solenoid valve that switches from the cooling mode of operation to the heating mode of operation. A diagram of the reversible assembly is presented below. 12

13 Diagram of the reversible assembly Symbols: 1 Compressor 2 Supply-air heat exchanger 3 Exhaust-air heat exchanger 4 hermostatic expansion valve 5 Non-return valve 6 Freon tank 7 Steam trap 8 Coolant humidity sensor 9 Four-way solenoid valve 10 Low/high pressure control that protects the compressor 13

14 SANDARD EQUIPEN Standard equipment of Okeanos air handling units includes: supporting frame, flexible connectors to connect ventilation ducts, the service switch, shut-off dampers, trap for draining condensate from the cross-flow heat exchanger, from the heat pipe and from the heat pump evaporator; automatic control and measurement elements according to the list provided further on in the catalogue. SPECIAL-PURPOSE ASSEBLY OF HE UNI he special-purpose assembly of the unit covers: an additional water-cooled condenser for heating swimming-pool water up; an additional water-cooled condenser for heating tap water up; two-speed motors to drive fans, instead of standard single-speed motors; a reversible heat pump that allows fresh air supplied in the summer to be cooled down; an electronically-controlled expansion valve in the cooling assembly of the heat pump or the reversible assembly; inspection windows or sight-glasses and internal lighting of the air handling unit; the shields and frames of the air handling unit can be of any colour; preparation of the air handling unit for outdoors installation; automatic control and measurement system designed to cooperate with a superior BS system. 14

15 arking air handling units arking air handling units 15

16 arking of automation systems for Okeanos swimming pool air handling units 16

17 DESIGN GUIDELINES In order to meet the expectations of designers of ventilation installations for swimming-pool halls, concerning calculation of the amount of air indispensable to dehumidify the air inside a hall containing a swimming pool with a given area, the catalogue presents formulas that allow one to calculate humidity gain and determine the flow rates of air handling units on this basis. Indoor swimming pools due to the significant gains of humidity are to have an effective ventilation system, ensuring the assimilation of humidity gain. It should however be noted that if the ventilation fulfils also the task of heating the pool hall, it is necessary to take stock of the gains and losses of heat in order to determine whether the amount of ventilation air calculated on the basis of the criterion of humidity gain is adequate. o keep the humidity in the room at a low level (for physiological reasons, and because of the structural stability of the building), humid air is to be removed and dry air is to be channelled from outside. Below is a table depicting temperature ranges in areas connected to the pool hall, and pool water temperature ranges. Air temperature in the room ype of room Room temperature ti[ C] depending on water temperature tw min max Entrance hall, adjacent rooms and stairways Changing rooms Sanitary facilities, administration offices and staff rooms Showers with adjacent toilets Indoor swimming pool emperature range of swimming pool water ype of swimming pool General swimming pool Pool for swimming lessons Pool for swimming lessons for small children Swimming pool in spas Hydrotherapy swimming pool Relative humidity in the swimming pool hall should be in the range of 45 to 65%. Water temperature tw [ C]

18 below: Amount of outdoor air, ensuring the removal of humidity gain is calculated according to the formula [m 3 /h] where: W [kg/h] - stream of mass of evaporated water, x [kg/kg] - water vapour content in the swimming pool air, x z [kg/kg] - water vapour content in the outside air while maintaining parameters for calculation for the summer period (the most adverse conditions of humidity assimilation), ρ z [kg/m 3 ] - density of the outside air. In the balance of humidity gains, it is necessary to consider gains resulting from evaporation of water from the pool basin and from the wet floor surfaces. W=W nb+wmp he amount of water evaporated from the pool basin is calculated as follows: where: F [m2] - surface of the pool basin, x [kg/kg] - water vapour content in saturated air at a temperature of pool water, x [kg/kg] - water vapour content in the swimming pool air, Still water oderate water movement Strong water movement Evaporation rate σ [kg/(m²xh)] he amount of water evaporated from the wet surface area is calculated as follows: where: t p [ C] t m [ C] - air temperature in the room, - air wet bulb temperature in the room, F mp [m 2 ] - wet surface, (usually 50-70% of the floor around the basin) 18

19 According to the German standard VDI 2089, calculation is recommended to be carried out using the following values: water vapour content in the swimming pool air: 14,3 g/kg, content of water vapour in the fresh air not greater than 9 g/kg due to the fact that higher content of water vapour is registered in the summer, and therefore it is allowable to have an increase in the water vapour content without its condensation on the surfaces of outside walls. In addition, some sources suggest that the obtained values should not be lower than the multiplicity of exchanges equal to: Size of the pool hall Number of air exchanges Small swimming pool hall 6 Standard swimming pool hall 5 Large swimming pool hall 4 However, the amount of air blown on the window, in view of their heating should be as follows Window height Amount of air per 1m window length m³/(h*m) In case of low-emission glass in warm frame, the amount of intake air can be reduced by about 30%. It is known that as the outside air temperature drops, its humidity content decreases, and hence the amount of outdoor air required to draining drips during the winter is much lower than in the summer. his means that the air handling unit can work with a large content of recirculating air, and the recirculation itself causes large heat savings. he minimum amount of fresh air is determined on the grounds of hygienic requirements. 19

20 In order to keep the cost of the ventilation system as low as possible, it is necessary to reduce the stream of the evaporated water mass and thus the amount of heat required to heat the water and heat the ventilation air by: a) maintaining the highest possible humidity in the hall, which is established by good thermal insulation of walls, and continuous intake of warm air onto the surface poorly insulated building components, b) maintaining the inside air temperature as high as possible in relation to the temperature of water (from 2 to 4 C); moreover, the positive effect is also an increase in the temperature of external wall surface, thereby reducing the risk of condensation of water vapour, c) maintaining possibly low rate of air flow in the room, d) maintaining water temperature as low as possible, e) covering the surface of water, when the pool is not in use. I. SWIING POOL AIR HANDLING UNIS WIH DOUBLE-SAGE HEA RECOVERY 1. Principle of operation of swimming pool air handling units o describe the principle of operation of swimming pool air handling units and to show the purposefulness of configuration of individual components used, below there are presented modes of operation of air handling units with two-stage heat recovery, using recirculation and cross-flow heat exchanger. In addition to the drawings, diagrams i-x depict transformations undergone by air treated in the air handling unit. Combinations of components indicated in this catalogue, in terms of thermodynamics, differ in terms of efficiency of heat recovery, dependent on the applied heat exchangers for heat recovery. 2. ode of operation of an air handling unit with two-stage heat recovery a) Heating of recirculated air in swimming pool non-operation period. EXHAUS AIR SUPLLY AIR 20

21 0 Dry-bulb thermometer temperature [ C] Humidity content [kg/kg] 2 1 Full recirculation during periods when the pool is not in use and acceptable indoor air humidity is not exceeded. Only the air intake fan and, possibly, water heater warming the air to a minimum temperature in the hall are operating. If two-gear motors or an inverter are used, the fan can operate at reduced capacity Enthalpy [kj/kg] ransformation of air: heating the recirculating air in the water heater in order to compensate for the loss of heat through the walls of the building b) Air dehumidification mode in winter while using the pool. FRESH AIR REURN AIR EXHAUS AIR SUPPLY AIR 21

22 Humidity content [kg/kg] he exhaust fan draws air from the pool hall. In the mixing chamber, part of the air is mixed with fresh air (2-3), and the remaining part, after 5 passing through the cross-flow exchanger and 4 3 transferring of heat to the fresh air (3-6), is thrown out. he proportion of fresh air amount to the amount of air removed depends on the humidity of air in the hall. In winter, when the 0 Dry-bulb thermometer temperature [ C] 2 6 specific humidity of the fresh air is much lower than the specific humidity of air in the hall, the required amount of fresh air due to dehumidification is negligible. hus, the minimum amount of fresh air in the winter depends on the criterion of the required amount of fresh air per person. Fresh air after passing through the heat exchanger (1-2) is heated, and then, after mixing with the extracted air (2-3), heats up in the heater (4-5) to the desired temperature, and then is channelled into the pool hall. Enthalpy [kj/kg] 1 ransformation of air: heating of fresh air in the cross-flow exchanger mixing of heated fresh air with the recirculating air heating mixed fresh air with recirculating air in the heater exhaust air transfers heat to the fresh air in the cross-flow exchanger 22

23 c) Air dehumidification mode in transition period FRESH AIR REURN AIR EXHAUS AIR SUPPLY AIR 0 Dry-bulb thermometer temperature [ C] Humidity content [kg/kg] During periods when the outside air temperature is slightly lower than the air temperature in the hall and at significant heat gain in the swimming pool, outdoor air is separated into two streams, one of which, while passing through the heat exchanger recovers heat (1-2), and parameters of the other stream do not change as it flows through the bypass. After mixing streams after the heat exchanger (3), the air without further treatment, is blown into the hall. In this way, by adjusting the degree of heat recovery in the recuperator, temperature of intake air is controlled. Enthalpy [kj/kg] ransformation of air: heating part of fresh air stream in the cross-flow exchanger 3- intake air temperature obtained by mixing fresh air of parameters of point 1 with heated fresh air of parameters of point exhaust air from the pool hall transfers its heat to the part of fresh air stream 23

24 d) Air dehumidification mode in summer period FRESH AIR REURN AIR EXHAUS AIR SUPPLY AIR In summer, when the temperature in the pool hall is too high, fresh air flows through the bypass of the cross-flow exchanger and heat recovery does not occur. he air in the air handling unit is not subject to any transformations while only dehumidifying and ventilating the pool hall. 3. Choosing air handling unit size In order to facilitate unit selection, the catalogue provide presents the ranges of air flow rates for particular sizes of air-conditioning handling units. he size of the air handling unit should be selected to ensure that the air flow rate (with reference to the internal air handling unit cross-section) is between 2.5 and 3.5 m/s for the required delivery. When the flow rate is 3 m/s, the operation of the air handling unit is silent and costeffective. he illustration below presents a chart facilitating preliminary selection of air handling unit size. 24

25 4. BS-RP-..-SW Swimming pool air handling unit with two-stage heat recovery - BS-RP-...-SW type using a crossflow exchanger, recirculation and fans with belt drive. Size BS-RP-1-SW to BS-RP-7-SW e a c H a a L1 L L3 80 B b b Size BS-RP-7BIS-SW to BS-RP-8BIS-SW L4 a H a L1 L L B b b e c a 25

26 Range of air handling unit air flow rate BS-RP-...-SW ype of air handling unit Performance capacity [m³/h] aximum engine power [kw] aximum weight [kg] BS-RP-1-SW ,5 500 BS-RP-2-SW ,2 600 BS-RP-3-SW BS-RP-3BIS-SW BS-RP-4-SW , BS-RP-5-SW , BS-RP-6-SW , BS-RP-5BIS-SW BS-RP-6BIS-SW , BS-RP-7-SW BS-RP-7BIS-SW BS-RP-8-SW , BS-RP-8BIS-SW Dimensions of air handling unit BS-RP-...-SW ype of air handling unit B H L1 L2 L3 L a b c e BS-RP-1-SW * * BS-RP-2-SW * * BS-RP-3-SW * * BS-RP-3BIS-SW * * BS-RP-4-SW * * BS-RP-5-SW * * BS-RP-6-SW * * BS-RP-5BIS-SW * * BS-RP-6BIS-SW * * BS-RP-7-SW BS-RP-7BIS-SW BS-RP-8-SW BS-RP-8BIS-SW mm * maximum length of section and the air handling unit because of the size of the cross-flow exchanger used 26

27 BS-RP-...-SW Swimming pool air handling unit with two-stage heat recovery - BS-RP-...-SW type using fans with direct drive Size BS-RP-1-SW to BS-RP-7-SW a H a L1 L L2 Size BS-RP-7BIS-SW to BS-RP-8BIS-SW a H a B b b a a L1 L L2 B b b a a L

28 Range of air handling unit air flow rate BS-RP-...-SW ype of air handling unit Performance capacity aximum engine power aximum weight [m³/h] [kw] [kg] BS-RP-1-SW ,5 500 BS-RP-2-SW BS-RP-3-SW BS-RP-3BIS-SW BS-RP-4-SW BS-RP-5-SW , BS-RP-6-SW , BS-RP-5BIS-SW BS-RP-6BIS-SW BS-RP-7-SW BS-RP-7BIS-SW BS-RP-8-SW , BS-RP-8BIS-SW Dimensions of air handling unit BS-RP-...-SW ype of air B H L1 L2 L3 L a b handling unit mm BS-RP-1-SW * * BS-RP-2-SW * * BS-RP-3-SW * * BS-RP-3BIS-SW * * BS-RP-4-SW * * BS-RP-5-SW * * BS-RP-6-SW * * BS-RP-5BIS-SW * * BS-RP-6BIS-SW * * BS-RP-7-SW BS-RP-7BIS-SW BS-RP-8-SW BS-RP-8BIS-SW * maximum length of section and the air handling unit because of the size of the cross-flow exchanger used 28

29 5. BS-2RP-...-SW Swimming pool air handling unit with two-stage heat recovery - BS-2RP-...-SW type using a double cross-flow exchanger and recirculation. Size BS-2RP-1-SW to BS-2RP-7-SW L1 L2 L L3 80 B b b H Size BS-2RP-7BIS-SW, BS-2RP-8-SW L1 L2 L L B b b H L4 29

30 Range of air handling unit air flow rate BS-2RP-...-SW ype of air handling unit Performance capacity aximum engine power aximum weight [m³/h] [kw] [kg] BS-2RP-1-SW ,5 550 BS-2RP-2-SW ,2 670 BS-2RP-3-SW BS-2RP-4-SW , BS-2RP-5-SW , BS-2RP-6-SW BS-2RP-5BIS-SW BS-2RP-6BIS-SW BS-2RP-7-SW BS-2RP-7BIS-SW BS-2RP-8-SW Dimensions of air handling unit BS-2RP-...-SW ype of air handling unit B H L1 L2 L3 mm L4 L a b BS-2RP-1-SW BS-2RP-2-SW * * BS-2RP-3-SW * * BS-2RP-4-SW * * BS-2RP-5-SW BS-2RP-6-SW * * BS-2RP-5BIS-SW * * BS-2RP-6BIS-SW BS-2RP-7-SW BS-2RP-7BIS-SW BS-2RP-8-SW * maximum length of section and the air handling unit because of the size of the cross-flow exchanger used 30

31 6. BS-HP-...-SW Swimming pool air handling unit with two-stage heat recovery - BS-HP-...-SW type using a recuperator of heat pipe type, recirculation and fan with belt drive Size BS-HP-1-SW to BS-HP-7-SW 80 L1 L2 L B H a c e b b a a Size BS-HP-7BIS-SW to BS-HP-8BIS-SW a a H a L1 L2 L3 L B b 31

32 Range of air handling unit air flow rate BS-HP-...-SW ype of air handling unit Performance capacity aximum engine power aximum weight [m³/h] [kw] [kg] BS-HP-1-SW ,5 500 BS-HP-2-SW ,2 600 BS-HP-3-SW BS-HP-3BIS-SW BS-HP-4-SW BS-HP-5-SW , BS-HP-6-SW , BS-HP-5BIS-SW , BS-HP-6BIS-SW BS-HP-7-SW BS-HP-7BIS-SW BS-HP-8-SW BS-HP-8BIS-SW Dimensions of air handling unit BS-HP-...-SW ype of air B H L1 L2 L3 L a b c e handling unit mm BS-HP-1-SW BS-HP-2-SW BS-HP-3-SW BS-HP-3BIS-SW BS-HP-4-SW BS-HP-5-SW BS-HP-6-SW BS-HP-5BIS-SW BS-HP-6BIS-SW BS-HP-7-SW BS-HP-7BIS-SW BS-HP-8-SW BS-HP-8BIS-SW

33 BS-HP-...-SW Swimming pool air handling unit with two-stage heat recovery - BS-HP-...-SW type using fans with direct drive Size BS-HP-1-SW to BS-HP-7-SW 80 L1 L2 L Size BS-HP-7BIS-SW to BS-HP-8BIS-SW a a H a L1 L2 L3 L B b a B b a a H a a b 33

34 Range of air handling unit air flow rate BS-HP-...-SW Performance aximum aximum ype of air capacity engine power weight handling unit [m³/h] [kw] [kg] BS-HP-1-SW ,1 500 BS-HP-2-SW ,5 570 BS-HP-3-SW ,2 700 BS-HP-3BIS-SW BS-HP-4-SW BS-HP-5-SW , BS-HP-6-SW , BS-HP-5BIS-SW , BS-HP-6BIS-SW BS-HP-7-SW BS-HP-7BIS-SW BS-HP-8-SW BS-HP-8BIS-SW Dimensions of air handling unit BS-HP-...-SW ype of air handling unit B H L1 L2 L3 L a b BS-HP-1-SW BS-HP-2-SW BS-HP-3-SW BS-HP-3BIS-SW BS-HP-4-SW BS-HP-5-SW BS-HP-6-SW BS-HP-5BIS-SW BS-HP-6BIS-SW BS-HP-7-SW BS-HP-7BIS-SW BS-HP-8-SW BS-HP-8BIS-SW mm 34

35 7. he principle of operation of automatic control and measurement systems in swimming pool air handling units with double-stage heat recovery. he air handling unit is operated via a freely programmable controller with an application customised to the configuration of the unit. easurement of temperature and humidity of interior is carried out with sensors located in the exhaust duct, allowing for obtaining an average measurement result. he automation system is designed to maintain the selected parameters (temperature and humidity) in rooms for particular modes of operation (day and night). he temperature is controlled by varying the degree of recovery in the recuperator and opening the valve of the water heater. he duct air temperature sensor, in addition to participation in the cascade control, controls also the minimum and maximum air temperature supplied to the room. Indoor humidity is controlled by varying the degree of air recirculation. he minimum amount of air necessary for hygienic purposes in the day mode is defined in the parameters of the controller. he increase in humidity above a predetermined value causes an increase the use of outside air. he water heater is protected by means of a frost protection thermostat, located behind the exchanger; a drop in temperature below 5 C stops the fans, closes external dampers and fully opens the heater valve. On request, it is also possible to manufacture the air handling unit with varying air flow rate controlled based on air humidity at the pool. On request of the customer - the automation system can be designed to work with the BS master system. he following pages include diagrams and descriptions of automation systems for air handling units presented in the catalogue. 35

36 8. Diagram of automation system for air handling units with two-stage heat recovery with belt-driven fans. a) Diagram of automation system for air handling units with a cross-flow exchanger A P DPS S DPS 2-03 P POIESZCZENIE SWIING POOL HALL DPS 2-04 P 2-05 XV PG X DPS P P DPS 2-05 X H H 2-03 AI AO DI DO AI AO DI DO b) Diagram of automation system for air handling units with a heat pipe A P DPS _ 2-04 DPS 2-04 P 2-05 XV + PG S DPS 2-03 P X DPS P POIESZCZENIE SWIING POOL HALL DPS P 2-05 X H H 2-03 AI AO DI DO AI AO DI DO 36

37 Specification of components of the automatic control and measurement system: / / /2-03 /2-04 /2-05 DPS/ DPS/ DPS/2-03 DPS/2-04 DPS/2-05 XV/ S/ / / /2-03 /2-04 H/ X/ X/ servomotor of the supply-air damper servomotor of the exhaust-air damper servomotor of the heat recuperator (cross-flow heat exchanger, tube-type heat exchanger) servomotor of the recirculation damper servomotor of the recirculation damper full recirculation (night mode) pressure control of the supply-air filter pressure control of the exhaust-air filter pressure control of the supply-air fan pressure control of the exhaust-air fan pressure control of the recovery heat exchanger water heater adjustment valve with a servomotor anti-freeze thermostat of the water heater temperature sensor in air-supply duct temperature sensor in exhaust-air duct external temperature sensor sensor protecting recovery heat exchanger against frosting humidity sensor in exhaust-air duct motor of the supply-air fan motor of the exhaust-air fan ode of operation of the air handling unit 1. he unit is stopped. he anti-freezing function of the heater is active. 2. Day mode (intensive use of the swimming pool). Both fans working. Regulation of temperature through exchanger heat recovery and adjustment of the heater. Regulation of humidity by controlling the degree of recirculation. 3. Night mode (swimming pool not used). Work of air intake fan only. Open damper of full recirculation; closed damper of outside air. Control of temperature by controlling the water heater valve. In the case of increase in humidity above the predetermined value for the night mode, the system switches into the day mode, maintaining the night mode parameters. 4. AUO mode - he air handling unit is switched on and it switches between the day and night modes according to the timing programmed in the controller. 37

38 9. Diagram of automation system for air handling units with two-stage heat recovery with direct drive fans. a) Diagram of automation system for air handling units with a cross-flow exchanger A P DPS S SWIING POIESZCZENIE POOL HALL XV PG X DPS P P DPS 2-03 X H H ~ ~ 2-03 AI AO DI DO AI AO DI DO b) Diagram of automation system for air handling units with a heat pipe A P DPS _ 2-04 XV + PG S X DPS P SWIING POIESZCZENIE POOL HALL DPS P 2-03 X H H ~ ~ 2-03 AI AO DI DO AI AO DI DO 38

39 Specification of components of the automatic control and measurement system: / / /2-03 /2-04 DPS/ DPS/ DPS/2-03 DPS/2-04 DPS/2-05 XV/ S/ / / /2-03 /2-04 H/ X/ X/ servomotor of the supply-air damper servomotor of the exhaust-air damper servomotor of the heat recuperator (cross-flow heat exchanger, tube-type heat exchanger) servomotor of the recirculation damper pressure control of the supply-air filter pressure control of the exhaust-air filter pressure control of the supply-air fan pressure control of the exhaust-air fan pressure control of the recovery heat exchanger water heater adjustment valve with a servomotor anti-freeze thermostat of the water heater temperature sensor in air-supply duct temperature sensor in exhaust-air duct external temperature sensor sensor protecting recovery heat exchanger against frosting humidity sensor in exhaust-air duct motor of the supply-air fan motor of the exhaust-air fan ode of operation of the air handling unit 1. he unit is stopped. he anti-freezing function of the heater is active. 2. Day mode (intensive use of the swimming pool). Operation of fans of nominal air flow rate (higher). Regulation of temperature through exchanger heat recovery and adjustment of the heater. Regulation of humidity by controlling the degree of recirculation. 3. Night mode (when the swimming pool is not used). Operation of fans with reduced air flow rate. Regulation of temperature through exchanger heat recovery and adjustment of the water heater valve. In the case of increase in humidity above the predetermined value for the night mode, the system switches into the day mode (increase in fan air flow rate), maintaining the night mode parameters. 4. AUO mode - he air handling unit is switched on and it switches between the day and night modes according to the timing programmed in the controller. 39

40 II. COPAC SWIING POOL AIR HANDLING UNIS 1. Air handling unit of the BO-HP-...-SW type he compact air handling unit of the BO-HP-...-SW type with double-stage heat recovery is designed to ventilate and dehumidify halls of private indoor swimming pools, small hotel swimming pools and hydrotherapeutic swimming pools. It is characterised by simple and compact construction. he unit takes advantage of two methods of heat recovery from the exhaust air taken out of a swimming-pool hall, namely: recirculation and heat pipe. In this configuration, the air handling unit is fitted as a standard with an internal bypass line that is used: - to defrost the heat pipe in winter; - reduce the heat recovery in the summer, when heat gains inside the building are high. c c 40

41 A. echnical data, dimensions and weights of air handling units of the BO-HP-...-SW type echnical data of a BO-HP-...-SW air handling unit Size of the BO-HP-..-SW air handling unit / 1 2 Range of applications: aximum swimming pool area - private swimming pools m² aximum swimming pool area hotel swimming pools m² aximum swimming pool area public swimming pools m² Available flow rates and compression rates: Air flow rate m 3 /h Available supply air compression Pa Available exhaust air compression Pa Rated power consumption (for power supply 230V/50Hz): Supply-air fan W Exhaust-air fan W Noise level Supply-air fan at 1 m from the pumping side db(a) 70 72,5 Exhaust-air fan at 1 m from the pumping side db(a) 70 72,5 Dehumidification efficiency: According to VDI 2089* kg/h 9,8 16,3 echnical data of a water heater standard version Heating power** kw 12,5 22 Resistance of water flow through the heater kpa 4 3,5 Resistance of water flow through the valve kpa 3,6 8,7 Water flow rate m 3 /h 0,55 0,97 Dimensions Height H mm Width B mm Length L mm Width x height of the stub pipe a1xb1 mm 600 X X 600 Width x height of the fan stub pipe cxc mm 300 X X 350 Weight kg *VDI maximum partial pressure of steam for the air in the hall - 22,7 mbar - maximum humidity in the air of the swimming-pool hall - 14,3 gfkg - maximum humidity in the air supplied to the swimming-pool hall - 9 g/kg ** for the heating water temperature of 80/60 C and the air temperature of 8 C at the outlet 41

42 B. Principle of operation of the device A compact air handling unit of the BO-HP-...-SW type with single-phase motors is powered through regulators of revolutions per minute that allow the working point of the fans to be adjusted to the requirements of a particular installation. he unit is controlled through a freely-programmable controller with a firmware application adapted to a given configuration of the air handling unit. easurement of temperature and humidity indoors is carried out by means exhaust duct sensors that allow the measurements to be averaged. he automatic control and measurement system is aimed to maintain pre-set parameters (temperature and humidity) inside a room for the available operation modes (day and night), in order to maintain human thermal comfort inside a swimming-pool hall. he system has got an operation calendar that allows one to set the "day" and "night" temperatures. he calendar also allows one to set the required mode of operation of fans and air dampers for the periods the swimming pool is used (day time operation) and for the periods the pool is not used (nigh time operation). When the swimming pool is used, the system operates in the mode that involves intensive ventilation. Otherwise, the system operates in the mode, where the ventilation intensity is reduced. ode of operation of the air handling unit a) Unit is stopped he anti-freezing function of the heater is active. he water heater is protected with an anti-freezing thermostat, installed behind the heat exchanger. When the temperature drops below 5 C, fans are stopped, external dampers get closed and the heater valve gets fully opened. b) Day mode (intensive use of the swimming pool) Both fans operate. emperature is regulated by changing the recovery degree in the recuperator and by opening the valve of the water heater. he supply-air duct temperature sensor - apart from participating in the cascade regulation additionally limits the minimum and maximum temperature of the air supplied to the room. he required humidity is maintained by supplying appropriate volume of external air and removing the same volume of air from the swimming pool building. Recirculation is used to maintain the optimum humidity and temperature of the air in the swimming-pool hall, while simultaneously saving energy required for heating. he degree of air recirculation depends on the relative humidity of the air inside the swimming-pool hall. When the humidity exceeds the pre-set value, recirculation damper P5 gets partly closed and the amount of external air is increased. he minimum number of changes of air may be limited at will to the values that are imposed by hygienic requirements posed for the air inside the facility, according to the number of persons simultaneously present inside the hall that was assumed for calculations. he minimum amount of the air indispensable for hygienic purposes in the day mode is set with the controller parameters. 42