DANVENT CATALOGUE 1999

Transcription

1 DANVENT CATALOGUE 1999

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3 CONTENTS Contents TC 7-10 Combi-unit Combination examples with dimensions and weights 16 Transportation & installation Roof unit Damper sections Filter sections Heat recovery sections Heater sections Cooler sections Humidifier sections Fan sections Accessories Contents SPAR SPAR-unit Function variations with dimensions & weights Roof units Specifications Dimensions Dampers, filters & heat recovery Heating & cooling Fan Accessories Contents SPC SPC roof unit

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5 TC

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7 Combi-Unit TC The Combi-Unit TC is assembled from a wide range of well dimensioned standard sections that can be combined to meet the demands made on highly advanced air handling units. can be supplied with fire insulation which increases the insulating characteristics of the unit. is available in 13 sizes ranging from a compact unit just 450 mm high to a larger unit which readily lends itself to major air handling projects. Flow range for the TC unit: m 3 /s (700-54,000 m 3 /h). features large smooth surfaces both inside and out. This makes the unit particularly easy to clean. The surface treatment of the unit satities the requirements for environmental class 2 in accoedance with the standard DS 454. A version of the unit which meets the requirements for environmental class 3 is also available. is made of galvanised torsionally rigid profiles which give the unit great strength. The individual sections are easy to assemble owing to our wellknown wedge jointing system. The TC is a very airtight unit. It meets class A sealing requirements in accordance with the standard EN A model of the TC wich meets the class B sealing requirements is also availeble. has inspection doors positioned so as to facilitate access to the components wich are serviced regularly. The doors are fitted with twin sealing strips and effective locking systems operated by means of sturdy handles. As the TC is CE approved, the inspection doors can only be opened by using a spcial key. always has its winter clothes on. The casing is insulated with 50 mm of mineral wool sandwiched between two sheets of galvanised steel. This means that the thermal insulation and sound attenuation characteristics of the TC unit are excellent. has hinges on all large inspection doors. This makes it possible to service the unit without having to remove the doors. If there is insufficient space to open the doors on their hinges, the hinges are easily disassembled and the doors can then be removed. 7

8 Combi-Unit TC Heat Recovery - Considerable Energy Savings The combi-unit TC is available with a variety of advanced heat recovery systems, all of which substantially reduce energy consumption for heating outdoor air. Rotary Heat Exchanger The rotary heat exchanger (TCC) is a particularly efficient heat recovery unit, and can also recover moisture from the warm exhaust air. As a result, this type of heat exchanger is the most energy efficient of all. The efficiency can be controlled by the electronic VARIMATIC system. Cross-flow Heat Exchanger The cross-flow heat exchanger (TCQ) is a highly efficient plate heat exchanger and is used where the two air flows need to be kept apart, e.g. in order to avoid odours being carried over to the supply air flow. As the unit does not transfer moisture between the air flows, it can be used in dehumidification systems. The built-in damper system can be used to control the level of heat recovery. Run-around Coil Heat Exchanger Run-around coil heat exchangers are used where the two air flows need to be kept completely separate The heat is recovered via a heating coil in the supply airflow and a cooling coil in the exhaust airflow. The two elements are connected by a fluid-filled piping system. A motorised valve in the liquid cycle can be used to control the efficiency of the heat recovery process. Heat Pipe Heat Exchanger The TC model fitted with a heat pipe heat exchanger is used in situations in which the two airflows need to be kept completely separate. The heat exchanger contains a large number of heat pipes with aluminium fins. In the middle of the exchanger, there is a sealed plate which ensures that the two ariflows never come into contact with one another. The heat recovery process can be controlled and even stopped by using the exchanger's built-in bypass. Fans The fan section (TCV) can be supplied with centrifugal fans featuring either forward-curved (FK) or backwardcurved (BK) blades. Selection of Fan Type The high efficiency of the BK fan (max. 85%) makes this type of fan the preferred choice for systems in which low energy consumption is required, particularly in systems which have to deal with large volumes of air under high pressure. BK fans are also often chosen for installations with great variations in the filter pressure drops, but which are also required to operate with a moreor-less constant airflow. FK fans are mainly used in installations in which the emphasis is on lower fan speeds and reduced noise levels. Effective Vibration Insulation In the TCV section, the fan and motor are mounted on a base frame which is insulated from the unit casing by effective anti-vibration mountings. For models sized 05-31, the fan and motor can easily be taken out through the side of the casing on special slide rails. Airflow Control The fans can be supplied with single-speed or twospeed motors. When using two-speed motors, the airflow can be controlled in stages, and appreciable savings in energy can be made by using low speeds. Single-speed fans can be fitted with frequency converters to provide continuous variation of the fan speed and airflow. This makes it possible to achieve considerable savings in energy by operating at low speeds. The combination of fan, motor and frequency converter is well suited for use in installations dealing with variable airflows. 8

9 Combi-Unit TC Selection of Unit Size The charts show the recommended airflow ranges for the 13 sizes of combi-unit TC used in normal types of installation. The airflows stated are intended as a guide only. Special installation requirements can provide further guidelines for selecting the size of the unit. m 3 /h m 3 /s 15,0 10, , , , , , , , : Damper, filter, rotary and cross-flow heat exchangers, heating coil, fan. 2: Run-around coil heat exchangers, heat pipe heat exchangers, cooling coil 3: Humidifier 9

10 Combi-Unit TC H B L Unit Dimensions The chart shows the main dimensions of the various sections of the TC unit. Detailed measurements and weights can be found on the data sheets for the individual sections of the unit. Str B H*) H*) The overall height of mixing section TCP, rotary exchanger TCC, cross-flow exchanger TCQ and heat pipe exchanger TCJ is 2 x H. Size Section L Damper TCA Damper TCB Mixing TCM Mixing TCP Filter TCG Filter TCF Rotary exchanger TCC Cross-flow exchanger TCQ Run-around coil exchanger TCR Heat pipe exchanger TCJ Heater TCH Electric-heater TCE Electric-heater TCE Cooler TCK Humidifier TCX Fan TCV Sound attenuator TCD Sound attenuator TCD Sound attenuator TCD Empty section TCO Numerous variations - see page 82 10

11 Combi-Unit TC Combination Examples The various sections of the TC unit can be combined in many different ways. Installation specifications and requirements will, in most cases, determine which sections are to be used. Examples of some typical TC combinations are shown below. The dimensions B, H and L refer to the width, height and and length of the unit. There may be small variations in the weights specified due to differences in the sizes of the motors and the heating and cooling coils. All combinations can be fitted with a humidifier. Combination 1 Supply air Size B H L kg*) Combination 2 Supply air Cooling Size B H L kg*) Combination 3 Supply air Exhaust air Mixing Size B H L kg*) *) All weights are approximate. 11

12 Combi-Unit TC Combination 4 Supply air Exhaust air Mixing Cooling Size B H L kg*) Combination 5 Size B H L kg*) Supply air Exhaust air Mixing Combination 6 Supply air Exhaust air Mixing Cooling Size B H L kg*) Combination 7 Supply air Exhaust air Heat recovery with rotary exchanger Size B B 1 H L kg*) B 1 : Width of heat exchanger TCC *) All weights are approximate. 12

13 Combi-Unit TC Combination 8 Supply air Exhaust air Cooling Heat recovery with rotary exchanger Combination 9 Supply air Exhaust air Mixing Heat recovery with rotary exchanger Size B B 1 H L kg*) B 1 : Width of heat exchanger TCC Size B B 1 H L kg*) B 1 : Width of heat exchanger TCC Combination 10 Supply air Exhaust air Mixing Heat recovery with rotary exchanger Normal operation: % outdoor air and exhaust air - no return air Night operation: No outdoor or exhaust air - % return air - exhaust air fan stopped. Size B B 1 H L kg*) B 1 : Width of heat exchanger TCC Combination 11 Supply air Exhaust air Possibility for mixing Heat recovery with rotary exchanger NB: Excess pressure in exhaust air at the heat exchanger Size B B 1 H H 1 L kg*) B 1 : Width of heat exchanger TCC H 1 : Greatest height of unit *) All weights are approximate. 13

14 Combi-Unit TC Combination 12 Supply air Exhaust air Heat recovery with cross-flow exchanger Size B H L kg*) Combination 13 Supply air Exhaust air Cooling Heat recovery with cross-flow exchanger Size B H L kg*) Combination 14 Supply air Exhaust air Mixing Heat recovery with cross-flow exchanger Size B H L kg*) Combination 15 Supply air Exhaust air Heat recovery with cross-flow exchanger Size B H L kg*) *) All weights are approximate. 14

15 Combi-Unit TC Combination 16 Supply air Exhaust air Heat recovery with run-around coil exchanger Size B H L kg*) Combination 17 Supply air Exhaust air Cooling Heat recovery with run-around coil exchanger Size B H L kg*) Combination 18 Size B H L kg*) Supply air Exhaust air Heat recovery with heat pipe exchanger Combination 19 Supply air Exhaust air Cooling Heat recovery with heat pipe exchanger Size B H L kg*) *) All weights are approximate. 15

16 Combi-Unit TC Transportation and Assembly of the Combi-Unit TC The combi-unit TC can be supplied as a conventional sectionalised unit, or as a fullyassembled integrated unit where the components are supplied ready-mounted on a common base frame. When the unit is in place in the building, the sections can easily be assembled by means of our well-known wedge jointing system that results in a completely sealed and very sturdy assembly of the frame profiles of the various sections. Fully-Assembled Integrated Unit Unit for indoor assembly Soft lifting straps Space permitting, the ready-mounted option provides a number of advantages, as the time spent on installing and assembling the unit is substantially reduced. If the combi-unit TC is supplied as a fullyassembled integrated unit, it is fitted to a common base frame. This makes it possible to lift and transport the unit. Sectionalised Unit If the combi-unit TC is supplied in sections, the individual sections should be placed on sturdy transport pallets of a size to match the different sections. For large installations, it may be necessary to use several pallets. Once on the pallets, the units can be transported from the factory directly to the assembly site. There are holes in the base frame through which lifting poles should be passed when lifting the unit. Soft lifting straps can then be attached to the ends of the poles. 16

17 Roof Unit TC Assembling the Roof Unit The unit should be assembled on a level horizontal underlay with sufficient load capacity. The design and load capacity of the underlay must be appropriate for the size and location of the unit. The TC roof unit is a combi-unit intended for outdoor assembly. Larger units can be supplied in sections to facilitate transportation and assembly. The unit features a special roof construction which provides effective protection against the effects of the weather. The underlay should be completely horizontal in order to ensure correct drainage from the condensation trays, for example, and to ensure that the inspection doors can be opened easily. Type 1 Roof unit B x L The roof unit is built on a base frame with lifting holes so as to make it easier to lift the unit into position on the roof of the building. H 1 The TC roof unit is available with all models of heat exchanger. The unit can also be fitted with special components to stop rain or snow penetrating the air inlet and outlet. The unit can also be supplied with sound attenuators and sections which lead the air directly down into the building, so that the installation can be mounted without ducts on the roof. The TC roof unit is made up of individual sections which feature the same sturdy frame profiles as conventional TC units. Type 2 Roof unit H B x L 1 Transportation Soft lifting straps 1) Insulation and covering: see building contract Spacing pole The roof unit is built onto a base frame which enables the unit to be transported and mounted. There are holes in the base frame through which lifting poles can be passed to lift the unit. When lifting roof units, spacing poles should be used to keep the lifting straps free of the roof of the unit, in order to avoid damaging the lip of the roof. Type 1: Mounted on the roof framework. A watertight covering should be applied before mounting. The roof framework can also be used to offset the pitch of the roof. Type 2: Mounting on the roof structure. Watertight graduations can be made after mounting. The base frame is made of robust galvanised steel sheets with a profile which facilitates the subsequent fitting of the watertight covering.the base frame is also fitted with a drip edge as shown above. H = mm for TC H = 300 mm for TC

18 Roof Unit TC Door Holders Duct Section 1 2 All the doors on the roof units are fitted with door holders. This makes it possible to work on the units even in windy conditions. Pipe Box Duct sections 1 and 2 are used on roof units in which the airflows are to be led down into the building so that the installation can be mounted without ducts on the roof. This is typically carried out in a TCO section. Type 1 leads the unit s upper airflow down into the building, while the lower airflow is connected directly to the ducts in the building. Type 2 leads both the unit's airflows down into the building and can be used, for example, in combination with a sound attenuator section. Air Inlet and Outlet Coil at bottom of unit A pipe box is used on TC roof units where the piping installations for the heating, cooling and recovery coils need to be protected against the rain, snow and cold. The pipe box is insulated with 50 mm mineral wool sandwiched between two galvanised steel sheet casings. It is connected to the roof unit by means of a special sealing profile which also makes it easy to lift the pipe box off when mounting and inspecting the piping installation. A louvre grill is used for the air inlet and outlet on TC roof units intended for direct air inflow. This effectively protects the unit against rain and snow. The closely fitting louvre dampers prevent the outdoor air from entering the unit when it is not running, thereby protecting the unit's components. Combination Example 18

19 Damper Section TCA T he damper section TCA consists of an insulated casing and a damper with contrarotating damper blades. The TCA can be used as a supply or exhaust damper. The damper blades are made of aluminium and are supported by bearings made of ABS. The damper blades are interconnected by means of a system of arms. A damper shaft is passed through the unit casing and can be connected to a damper motor. An arrow clearly indicates the position of the dampers. The dampers feature tight-fitting rubber profiles between the blades, and special sealing strips at the end of each blade. This means that the sealing of the dampers conforms to the class 3 sealing requirements laid down in standard DS 447 and the class 2 sealing requirements as stated in standard EN Dampers conforming to the class 4 sealing requirements of standard DS 447 are also available. The TCA can also be supplied with insulated damper blades. Pressure Drop Across Damper 90 = fully open damper m 3 /s 0,2 0,3 0,5 1,0 2,0 3,0 5,0 10,0 15, m 3 /h

20 Damper Section TCA Pos. H Pos. V H B L Dimensions and Weight Size B H L Weight kg Torque (Nm) /Size This table shows the (minimum) torque necessary or the performance of the damper motor performance with varying pressure drops across the damper. Specification TCA - Size - Pos. - Sealing class (DS 447) Example: TCA H - Cl.3 20

21 Damper Section TCB T he damper section TCB consists of an insulated casing and a damper with parallel rotating damper blades. The TCB can be used as a supply or exhaust damper. The damper blades are made of aluminium and are supported by bearings made of ABS. The damper blades are interconnected by means of a system of arms. A damper shaft is passed through the unit casing and can be connected to a damper motor. Pressure Drop Across Damper An arrow clearly indicates the position of the dampers. The dampers feature tight-fitting rubber profiles between the blades and special sealing strips at the end of each blade. This means that the sealing of the dampers conforms to the class 3 sealing requirements laid down in standard DS 447 and the class 2 sealing requirements as stated in standard EN Dampers conforming to the class 4 sealing requirements of standard DS 447 are also available. The TCB can also be supplied with insulated damper blades. 90 = fully open damper m 3 /s 0,2 0,3 0,5 1,0 2,0 3,0 5,0 10,0 15, m 3 /h

22 Damper Section TCB Damper on the Top Damper on the Bottom Pos. V 1 Pos. H 35 Pos. V 5 Pos. H F 2 H 6 H 3 F 7 35 B 4 35 F L B 8 35 F L Dimensions and Weight Size B H L F Weight kg Torque (Nm) /Size This table shows the (minimum) torque necessary for the performance of the damper motor with varying pressure drops across the damper. Specification TCB - Size - Pos. - Connection - Sealing class (DS 447) Example: TCM H - 2/4 - Cl.3 22

23 Mixing Section TCM T he mixing section TCM is fitted with two dampers with parallel rotating damper blades The TCM is used as a supply air and mixing damper and can, together with damper section TCB, constitute a complete mixing unit. The damper blades are made of aluminium and are supported by bearings made of ABS. The damper blades are interconnected by means of a system of arms. The TCM can be supplied with insulated damper blades. The dampers feature tight-fitting rubber profiles between the blades and special sealing strips at the end of each blade. This means that the sealing of the dampers conforms to the class 3 sealing requirements laid down in standard DS 447 and the class 2 sealing requirements as stated in standard EN Dampers conforming to the class 4 sealing requirements of standard DS 447 are also available. Pressure Drop Across Damper 90 = fully open damper m 3 /s 0,2 0,3 0,5 1,0 2,0 3,0 5,0 10,0 15, m 3 /h

24 Mixing Section TCM Pos. V 1 Pos. H F 2 H F 3 35 B F L 4 35 Dimensions and Weight Size B H L F Weight kg Torque (Nm) /Size This table shows the (minimum) torque necessary for the performance of the damper motor with varying pressure drops across the damper. Specification TCM - Size - Pos. - Connection - Damper motor coupling (A/B) - Sealing class (DS 447) Example: TCM H - 2/3 - Cl.3 24

25 Mixing Section TCP T he mixing section TCP is a complete mixing unit with supply air, exhaust air and mixing dampers. It can, for example, be used in conjunction with the rotary heat exchanger TCC. The TCP has 3 dampers with contrarotating damper blades made of aluminium, which are supported by bearings made of ABS. A shaft is passed through the unit casing from each damper, and can then be connected to the respective damper motor. An arrow indicates the position of each damper. The dampers feature tight-fitting rubber profiles between the blades and special sealing strips at the end of each blade. This means that the sealing of the dampers conforms to the class 3 sealing requirements laid down in standard DS 447 and the class 2 sealing requirements as stated in standard EN Dampers conforming to the class 4 sealing requirements of standard DS 447 are also available. The TCP can also be supplied with insulated damper blades. Pressure Drop Across Supply Air and Exhaust Air Dampers 90 = fully open damper m 3 /s 0,2 0,3 0,5 1,0 2,0 3,0 5,0 10,0 15, m 3 /h

26 Mixing Section TCP Pos. V Pos. H 70 H L B Dimensions and Weight Size B H L Weight kg Torque (Nm) /Size This table shows the (minimum) torque necessary for the performance of the damper motor with varying pressure drops across the damper. Specification TCP - Size - Pos. - Sealing class (DS 447) Example: TCP V - Cl.3 26

27 Filter Section TCG T he filter section TCG is short in length, and consists of one or more cassettes fitted with a pleated filter mat to increase the filter area. The filter material rates class EU3 (G3) and should be changed when dirty. The TCG is fitted with a door for removing the filter. Tappings for a manometer or a filter monitor are supplied with the section. The chart below indicates the design pressure drop, the starting pressure drop with a clean filter, and the recommended terminal pressure drop. Design Pressure Drop Recommended terminal pressure drop Starting pressure drop (clean filter) m 3 /s 0,2 0,3 0,5 0,7 1,0 1,5 2,0 3,0 5,0 7,0 10,0 15,0 m 3 /h

28 Filter Section TCG Pos. H Pos. V H B L F = Space required for removal of filter F Dimensions and Weight Size B H L F Weight kg Specification TCG - Size - Pos. Example: TCG H 28

29 Filter Section TCF T he filter section TCF is fitted with bag filters which are available in 5 classes. The bags have a large filter area which provides a low design pressure drop. The filters are attached with locking rails which are actuated using a large handle. The filters are also pressed against a rubber sealing strip which results in a particularly tight seal. Tappings for a manometer or filter monitor are supplied with the section. The TCF is Available in the Following Filter Classes EU3 EU5 EU6 EU7 EU9 G3 F5 F6 F7 F9 Pressure Drop Recommended terminal pressure drop EU EU5-EU EU7-EU Starting pressure drop (clean filter) EU3 EU5 EU6 EU7 EU9 m 3 /s 0,2 0,3 0,5 0,7 1,0 1,5 2,0 3,0 5,0 7,0 10,0 15, m 3 /h Design pressure drop 29

30 Filter Section TCF Pos. V Pos. H H B L F = Space required for removal of filter F Dimensions and Weight Size B H L F Weight kg Specification TCF - Size - Pos. - Filter class Example: TCF H - EU5 30

31 Heat Exchanger Section TCC T he heat exchanger section TCC is an efficient rotary heat exchanger which is designed for combination with the other sections of the TC unit without the need for adapter sections. The heat exchanger has an efficiency level of up to 85%, depending on the operating conditions. The TCC is fitted with a rotor of corrugated aluminium which produces a laminar airflow through the heat exchanger. The heat exchanger is available in two models: S - Standard model. Used in all installations where there are no aggressive sustances in the air. K - Corrosion-resistant model. Used in installations where there are aggressive substances which attack aluminium. This model is suitable for installations near the coast where the air has a high salt content, and in industrial areas. Two variants of the heat exchanger are available: T - Non-moisture transferring Used in cases where the heat from the exhaust air needs to be transferred to the supply air. In the event of low outdoor temperatures, this variant will also transfer moisture from the condensation in the exhaust air. E - Moisture transferring (heat content exchanger) Used in cases where the moisture and heat from the exhaust air need to be transferred to the supply air, as a high enthalpy content in the exhaust air can significantly contribute to heating and moistening the supply air. Operating expenses can be reduced by using this variant. Available only in model S. The heat exchanger is designed with large inspection doors to facilitate service. Furthermore, the rotor in models TCC 05 - TCC 31 is mounted on a slide rail system so that it can be taken out through the side of the casing. This facilitates inspection of the rotor. The TCC is fitted with efficient seals around the rotor and between airflows. The exchanger is available with a purging sector which prevents the exhaust air from being transferred to the supply side by the rotor. Heat exchanger with two varieties of drive unit: A - constant speed motor The heat exchanger is driven by a threephase geared motor which is connected to mains voltage. This type of operation provides maximum heat recovery when the exchanger is in operation. B - variable speed motor An electronic VARIMATIC speed controller and a geared motor are built into the unit for continuously variable control of the speed of the heat exchanger. 31

32 Heat Exchanger Section TCC Constant Speed The heat exchanger is driven by a three-phase geared motor connected to mains voltage. This type of operation provides maximum heat recovery when the exchanger is in operation. When connecting the motor, the installation should be provided with overcurrent protection. Motor data - Constant speed TCC Motor output Voltage Current Size W V A , , , , , ,6 Variable Speed The heat exchanger section TCC is fitted with an electronic VARIMATIC speed controller and a geared motor which together constitute a complete drive system for continuously variable control of the speed of the heat exchanger. The system is supplied with ready-mounted internal electrical connections. The VARIMATIC speed controller contains the following functions: The speed controller can be connected to the following variable control voltages: 0-10 V DC, 2-10 V DC, 0-20 ma DC, 4-20 ma DC and 0-20 V phase cut. The rated voltage is 1 x 230 V. The controller has a built-in safety switch for over- and undervoltage from the mains. The VARIMATIC system also has a built-in overload protector to safeguard the motor. A timer which automatically turns the rotor 15 o at 5-minute intervals. This function is used to purge the rotor outside normal operating hours. A rotary monitor which monitors the operation of the rotor, and gives a signal if the rotor should stop unintentionally. This function requires connection to an external alarm. A cooling recovery programme which automatically makes the exchanger rotate when the outdoor temperature exceeds the exhaust air temperature. This function is used primarily in the summer in order to recover cooling energy. This function requires connection to a differential thermostat. Data for Motor and VARIMATIC Speed Controller - Variable Speed VARIMATIC Speed Controller TCC Motor Output Type Voltage Current Fuse Size Type W V A included M E ,2 2,0 A M E ,7 6,3 A Mains voltage to the VARIMATIC must not be switched off outside normal operating hours, as the timer will then stop functioning. Heat Exchanger Positions V V H H H1 V1 H2 V2 H H3 V V3 Exhaust air Supply air 32

33 Heat Exchanger Section TCC Supply air after heat exchanger C C -10 T supply air before exchanger C ,6 0,8 1,0 1,2 1,4 T exhaust air before exchanger T supply air before exchanger Efficiency % q v supply air q v exhaust air 1,6 P, Air 250 Efficiency % q v supply air q = 1,0 v exhaust air ,2 0,3 0,5 0,7 1,0 2,0 3,0 5,0 7,0 10,0 15,0 m 3 /s m 3 /h q v supply air Example: TCC - 30 Supply air: 2.5 m 3 /s -10 C Exhaust air: 2.5 m 3 /s +20 C P, Air: 170 Efficiency: 73.5% Supply air temperature after heat exchanger: 12 C 33

34 Heat Exchanger Section TCC H C F B C L Dimensions and Weight Size B H L F C Weight kg Specification TCC - Size - Pos. - Rotor type (E/T, moisture transferring/non-moisture transferring) - Rotor wheel (S/K, standard/corrosion-resistant) - Drive system (A/B, constant/variable) Example: TCC H1 - T - S - B 34

35 Heat Exchanger Section TCQ T he heat exchanger section TCQ is a diagonally positioned cross-flow heat exchanger. The section is made of the same sturdy frame profiles and well-insulated casing elements as the TC unit. The TCQ is used in cases where there are special requirements as regards separation between the two air flows, e.g. to avoid odours being carried over to the supply air. The TCQ is also used in cases where the transfer of moisture from the exhaust air is undesirable, e.g. in connection with dehumidification systems. With the heat exchanger section TCQ, efficiency levels of % can be achieved in air handling units. In swimming baths, etc. where condensation is present, efficiency levels of up to 75% can be achieved, depending on the temperature and the relative humidity. The TCQ has a built-in bypass system for controlling and stopping the heat recovery process. In connection with the bypass system, the crossflow heat exchanger is fitted with a damper, as is the built-in bypass duct. In the event of low outdoor temperatures, the heat exchanger may ice up. This ice can be removed by adjusting the bypass damper or by reducing the speed of the supply air fan. The cross-flow heat exchanger is available in two models: S - Standard model. Used in all installations where there are no aggressive substances in the air. K - Corrosion-resistant model. Used in installations where there are substances which attack aluminium. Suitable for many types of installation in industry, swimming baths, etc. However, many chemical substances do not attack aluminium, so in these cases the heat exchanger can be used without protection against corrosion. This is a problem which should be closely examined in each case. As the TCQ has no moving parts, it is an almost maintenance-free unit. At the bottom of the TCQ section there is a condensation tray for collecting the water condensed in the exhaust air. The drain of the tray should be connected to a water trap with sufficient locking height. See the illustration of its theoretical design on page

36 Heat Exchanger Section TCQ Heat Exchanger Positions Viewed from the Inspection Side Exhaust air, diagonally downwards H1 V1 Heat Exchanger and Bypass 1. Bypass damper 2. Heat exchanger damper 3. Damper motor actuating arm 4. Cross-flow heat exchanger 5. Condensation tray 6. Condensation tray H2 V2 The bypass is controlled by a damper motor actuating the shaft passed through the section s side casing. The torque required for the damper motor is shown on page Supply air Exhaust air 3 Exhaust air, diagonally upwards *) 4 H3 V3 H4 V4 6 5 Efficiency Supply air *) Upward-directed exhaust air (positions 3 and 4) should only be used when the moisture content of the exhaust air before the exchanger does not exceed the following values: Supply air before exchanger -20 C -10 C 0 C Exhaust air before exchanger max. g water/kg air Exhaust air The table indicates the correction factor, k, for the efficiency levels in various conditions of the supply and exhaust air. The correction factor, k, should be multiplied by the proportional figure B 1. B 1 = q v supply air qv exhaust air Correction Factor, k Exhaust air be- Supply air before exchanger fore exchanger -20 C -10 C 0 C 10 C 20 C, 40% RH 1,10 1,20 1,30 1,30 22 C, 50% RH 1,05 1,15 1,25 1,30 25 C, 50% RH 0,95 1,05 1,20 1,30 28 C, 60% RH 0,85 1,00 1,10 1,20 qv supply air The figure B 1 k gives the proportion of qv exhaust air where the required efficiency level sought after can be found in the chart on the next page. 36

37 Heat Exchanger Section TCQ Supply air after heat exchanger C C C T exhaust air before exchanger T supply air before exchanger T supply air before exchanger Efficiency % q v supply air q v exhaust air 1,4 1,3 1,2 1,1 1,0 0,9 0,8 0, P, Air ,2 0,3 0,5 0,7 1,0 2,0 3,0 5,0 7,0 10,0 15,0 m 3 /s q v supply air m 3 /h Permissible Pressure Difference Across Heat Exchanger Example: TCQ - 30 Supply air: 2.25 m 3 /s -10 o C Exhaust air: 2.70 m 3 /s +20 o C 40% RH P, supply air: 190 P, exhaust air: 255 Max. P = 1500 P B 1 = 2.25 = Correction factor: 1.20 Efficiency: 64% Supply air temperature after heat exchanger: 9 o C 37

38 Heat Exchanger Section TCQ H 70 F RG L F RG - condensation tray B Dimensions and Weight Size B H L F RG 1" 1" 1" 1" 1¼" 1¼" 1¼" 1¼" 1½" 1½" 1½" 1½" 2" Weight kg Torque (Nm) /Size This table shows the (minimum) torque necessary for the performance of the damper motor with varying pressure drops across the damper. Specification TCQ - Size - Pos. - Exchanger model (S/K, standard/corrosion-resistant). Example: TCQ H1 - S 38

39 Heat Exchanger Section TCR T he TCR is is used to make a heat recovery system with run-around coil heat exchangers, and consists of an air heater section for the supply air and a cooler section for the exhaust airflow. The two sections are interconnected by means of a closed circuit in which a mixture of water and glycol circulates. The heat in the exhaust air is transferred to the supply air via the liquid, which thus preheats the supply air to a set temperature depending on the outdoor temperature and the efficiency level. The TCR run-around coil heat exchangers are used where the two airflows in the system are completely separated from each other, e.g. on two floors of a building, or where it is impossible to make the two airflows meet. The TCR heat exchanger section is fitted with a finned heat exchanger made of copper tubes and aluminium fins. When the outdoor temperature is low, the capacity of the system can be fully utilised. It will normally be necessary to supply extra heat from a postheating coil. For a large part of the year, the system will be able to supply all the heat required. It will therefore be necessary to control the capacity. This can be done by starting and stopping the pump, or by using a shunt system which leads a greater or lesser volume of the liquid around the heatemitting fin coil. In the event of extremely low outdoor temperatures, the risk of the condensation in the exhaust air freezing can be counteracted by fitting a temperature sensor on the cold side of the coil. The sensor can be used to control the shunt or a return damper incorporated into the system. The exhaust air section is fitted with a condensation tray at the bottom. The condensation is drained away through an outlet in the side. The outlet is connected to a water trap with sufficient locking height. See page 40. The heat exchanger is available in two models: S - Standard model. Used in all installations where there are no aggressive substances in the air. K - Corrosion-resistant model. Used in installations in which aggressive substances that attack aluminium are present. Suitable for many types of installation in industry, swimming baths, etc. The TCR can be supplied with a built-in droplet eliminator in the exhaust air section. A: Without droplet eliminator B: With droplet eliminator 39

40 Heat Exchanger Section TCR Sizing ge 41 contains charts for sizing a heat recovery system with two TCR sections. The charts are meant as a guide, and intended for an initial determination of the heat recovery data. The ultimate calculation is made in each individual case according to Danvent s sizing programme. The charts apply under the following conditions: T supply air : -10 C T exhaust air : 20 C 50% RH Ethylene glycol mixture: 30% The pressure drop on the air side, P, Air, indicates the pressure drop across each section. Data concerning the pressure drop on the liquid side, the volume of liquid circulated, etc., are calculated according to Danvent s sizing programme.. The chart below shows the supply air temperature after the heat exchanger. T exhaust air before exchanger T supply air before exchanger C 25 T supply air before exchanger C Effiency % Supply air after heat exchanger C Sizing of the Water Trap The drain pipes of components and humidifiers in which condensation occurs must always be fitted with water traps. For the water traps to function correctly, thus ensuring problem-free drainage of the water, the design and closing height of the water traps must be sized correctly. Unit with Negative Pressure Unit with Positive Pressure H1 H2 H1 H2 Negative pressure P () Positive pressure P () Negative H1 H2 Pressure P Min. 500 mm 40 mm mm 55 mm mm 70 mm Positive H1 H2 Pressure P Min mm 65 mm mm 90 mm mm 120 mm 40

41 Heat Exchanger Section TCR Exhaust air section Max. recommended condensation X without droplet eliminator Effiency % g water/kg air 0, ,3 1,2 1,1 1,0 0,9 0,8 0,7 q v supply air q v exhaust air E 22 E 20 E ,2 0,3 0,5 0,7 1,0 1,5 2,0 3,0 5,0 7,0 10,0 15, m 3 /s q v supply air m 3 /h Supply air Exhaust air P, air E 22 E 20 E 18 drop elim E 22 E 20 E mm H mm H 2 0 According to the I-X chart, 1.6 g water/kg air is condensed in the exhaust air. As this is less than the 2.2 g/kg indicated in the above chart, a droplet eliminator is not required. Supply air temperature after heat exchanger: 7 o C Example: TCR E22 Supply air: TCR E m 3 /s - 10 o C Exhaust air:tcr E22 - A 1.7 m 3 /s 20 o C 50% RH q v supply air q = 1.0 v exhaust air Efficiency: 57% P, supply air: 145 P, exhaust air:

42 Heat Exchanger Section TCR Pos. V Pos. H H RG B 120 L RG - condensation tray, only on exhaust air section Dimensions and Weight Size B H L RG 1" 1" 1" 1" 1¼" 1¼" 1¼" 1¼" 1½" 1½" 1½" 1½" 1½" Weight in kg exc. liquid E E E Specification Supply air: TCR - Size - Pos Output rate - Exchanger model (S/K, standard/corrosion-resistant) Exhaust air: TCR - Size - Pos Output rate - A/B (without/with droplet eliminator) - Exchanger model (S/K, standard/corrosion-resistant) Example: TCR V E22 - S Example: TCR H E22 - A - S 42

43 Heat Exchanger Section TCJ T he heat exchanger section TCJ is a heat recovery system made up of heat pipes. The section is made of the same sturdy frame profiles and well-insulated casing elements as the TC unit. The TCJ is used in cases where the two airflows need to be kept completely separate, e.g. to avoid odours being carried over from the exhaust air to the supply air. The TCJ is also well-suited to cases where the transfer of moisture from the exhaust air to the supply air is undesirable. With the heat exchanger section TCJ, efficiency levels of % can be achieved in air handling units, depending on the operating conditions and the moisture content of the exhaust air. The heat exchanger is made up of a large number of heat pipes with aluminium fins. There is a sealed plate in the middle of the heat exchanger, ensuring separation of the two airflows. Heat pipes are completely closed aluminium pipes filled with the environment-friendly cooling agent HFC 134A. The heat exchanger has a high net efficiency level, as the process does not use any extra energy. As the heat exchanger does not contain any moving parts, it has the advantage of being maintenancefree. The heat exchanger has a built-in bypass system for controlling and stopping the heat recovery process. In connection with the bypass system, the heat pipe heat exchanger is fitted with a damper, as is the built-in bypass duct. The heat exchanger is available in two models: S - Standard model. Used in all installations where there are no aggressive substances in the air. K - Corrosion-resistant model. Used in installations where aggressive substances that attack aluminium are present. Suitable for many types of installation in industry, swimming baths, etc. There is a condensation tray fitted at the bottom of the exhaust air section. The condensation is drained away through an outlet in the side. The outlet is connected to a water trap with sufficient locking height, see page 40. The TCJ can also be supplied with an built-in droplet eliminator in the exhaust air section. A: Without droplet eliminator B: With droplet eliminator The regular temperature distribution of the exhaust air in this type of exchanger ensures that the exchanger only ices up in the event of extremely low outdoor temperatures. 43