Refrigerant Type Heat Recovery Unit for Temperature & Humidity Control Room
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- Jonas Lane
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1 Legend of quality Energy saving products. Refrigerant Type Heat Recovery Unit for Temperature & Humidity Control Room ENERCOV, The best solution to create room environment controls such as humidity, temperature, supply air dewpoint and the other parameters as per your specified. ENERCOV HRU series are very flexible to design wide range of saturated suction temperature (SST) and saturated condensing temperature (SCT). This capability means lower sensible heat ratio controllable and selectable based on each application and providing supply air dewpoint from your air handling unit minimum to 8 o C at various supply air dry bulb temperature. provide standard full safety functions to improve operation reliability such as high/low pressure control, suction accumulator and liquid reciever tank including desuperheat TXV as standard equipments. Compressor unit with HGBP and/or VSD provides free reheat from compressor discharge gas and cooling capacity range kw Compressor for HRU Compressor for HRU Total solution to create the perfect climate controls for HVAC application
2 Technical Data High quality casing, compressor and DDC controls system for diversified commercial and industrial use - High operating efficiency - Years of trouble-free operation - High system application flexibility - DDC controllers with LCD 4x20 display - Provide with all necessary sensors - ETC. General Specification Design for energy saving ENERCOV HRU-series are designed and built to new innovation. HRUseries are consists of the scroll or semi-hermetic reciprocating compressor providing with hot gas bypass (HGBP) and/or variable speed drive (VSD) selecable to improve very efficient of cooling/heating/humidifying/ dehumidifying technology and provides trouble-free operation. Heat recovery feature is designed insteady of electric heaters by recover watsed heat energy from discharge gas of compressor discharge side during heating and dehumidifying process. Total energy saving is over 30-50%. Reliable operation Building owners will appreciate the high unit EERs (Energy Efficiency Ratios) offered by the CMP-series. These units provide greater efficiency than similar units in the marketplace, which translates into year-round operating savings. Heat Recovery Unit Model Unit HRU040 HRU048 HRU060 HRU080 HRU100 HRU120 HRU150 HRU200 HRU250 HRU280 HRU380 Cooling capacity* kw Btu/hr 40,102 49,488 62,218 81, , , , , , , ,355 Power source V/Ph/Hz /3/50 Required condensing capacity kw Max reheat capacity T1 kw T2 kw V Amps Compressor max. running amps Amps Locked Rotor Amps LRA Compressor power input kw Refrigerant - R-22 No.ofcompressor - 1 Compressor type Capacity control device - - Hermetic Scroll Hot gas bypass valve (HGBP) Semi-Hermetic Reciprocating HGBP + Variable Speed Drive (VSD) Capacity control range % 0-100% % % % Compressor VSD kw kw Capacity control range - 50% - 100% Proportional Suction accumulator - Yes Hotgasreheatvalve T1 - Electric on/off hot gas solenoid valve T2 Electronic 3 way modulating hot gas valve No. of refrigerant circuit - 1 Matching to air cooled CDU model - PVR048 PVR048 PVR060 PVR080 PVR100 RMC180 RMC180 RMC210 2xRMC180 2xRMC180 2xRMC210 Dimension in mm. Height Width Dept , , Approx. net weight kg Pipe conn. LIQ-IN/LIQ-OUT inch 3/8 3/8 1/2 1/2 1/2 5/8 5/8 5/8 3/4 3/4 7/8 DISC inch 1/2 5/8 5/8 5/8 7/8 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-5/8 HGS/HGR inch 1/2 5/8 5/8 5/8 7/8 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-5/8 HGBP inch 3/4 1/2 1/2 1/2 5/8 7/8 7/8 7/8 1-1/8 1-1/8 1-3/8 SUCT inch 5/8 7/8 7/8 7/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 1-5/8 2-1/8 Note : Cooling capacity based on saturated condensing temperature (SCT) 54.4 o C and saturated suction temperature (SST) 7.2 o C. Refrigerant Piping Sizing Installation Heat Recovery Unit Model Unit HRU040 HRU048 HRU060 HRU080 HRU100 HRU120 HRU150 HRU200 HRU250 HRU280 HRU380 Nominal cooling capacity kw Btu/hr 40,102 49,488 62,218 81, , , , , , , ,355 Equivalent length Refrig Line - Pipe sizing upon equivalent length LIQ Inches 3/8 3/8 1/2 1/2 1/2 1/2 5/8 5/8 3/4 3/4 3/4 <10 m. HGBP Inches 5/8 5/8 5/8 5/8 5/8 5/8 7/8 7/8 1-1/8 1-1/8 1-1/8 SUCT Inches 5/8 5/8 7/8 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-5/8 1-5/8 2-1/8 HGS/HGR/DISC Inches 5/8 1/2 7/8 7/8 7/8 7/8 1-1/8 1-1/8 1-3/8 1-3/8 1-3/8 LIQ Inches 3/8 3/8 1/2 5/8 5/8 5/8 5/8 3/4 3/4 3/4 7/ m. HGBP Inches 3/8 3/8 1/2 5/8 7/8 7/8 7/8 1-1/8 1-1/8 1-3/8 1-3/8 SUCT Inches 5/8 5/8 7/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 2-1/8 2-1/8 2-1/8 HGS/HGR/DISC Inches 1/2 1/2 5/8 7/8 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-5/8 1-5/8 LIQ Inches 1/2 1/2 5/8 5/8 5/8 5/8 3/4 3/4 7/8 7/8 1-1/ m. HGBP Inches 1/2 1/2 5/8 7/8 7/8 7/8 1-1/8 1-1/8 1-3/8 1-3/8 1-5/8 SUCT Inches 7/8 7/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 1-5/8 2-1/8 2-1/8 2-1/8 HGS/HGR/DISC Inches 5/8 5/8 7/8 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-5/8 1-5/8 2-1/8 LIQ Inches 1/2 1/2 5/8 5/8 5/8 5/8 3/4 3/4 7/8 1-1/8 1-1/ m. HGBP Inches 1/2 1/2 5/8 7/8 7/8 7/8 1-1/8 1-1/8 1-3/8 1-3/8 1-5/8 SUCT Inches 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 1-5/8 2-1/8 2-1/8 2-1/8 HGS/HGR/DISC Inches 7/8 7/8 7/8 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-5/8 1-5/8 2-1/8 LIQ Inches 1/2 1/2 5/8 5/8 3/4 3/4 3/4 7/8 1-1/8 1-1/8 1-1/ m. HGBP Inches 5/8 5/8 5/8 7/8 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-5/8 1-5/8 SUCT Inches 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 1-5/8 2-1/8 2-1/8 2-5/8 HGS/HGR/DISC Inches 7/8 7/8 7/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 1-5/8 2-1/8 2-1/8 LIQ Inches 5/8 5/8 3/4 3/4 3/4 3/4 7/8 7/8 1-1/8 1-1/8 1-1/ m. HGBP Inches 5/8 5/8 7/8 1-1/8 1-1/8 1-1/8 1-3/8 1-3/8 1-5/8 1-5/8 1-5/8 SUCT Inches 1-1/8 1-1/8 1-3/8 1-5/8 1-5/8 1-5/8 2-1/8 2-1/8 2-5/8 2-5/8 2-5/8 HGS/HGR/DISC Inches 7/8 7/8 1-1/8 1-3/8 1-3/8 1-3/8 1-5/8 1-5/8 2-1/8 2-1/8 2-1/8
3 Application Single DX cooling coil HRU system A B C D E PVR/RMC Series Single DX Coil HRU This HRU application can be designed for minimum supply air dewpoint o C. DX cooling coil is adjust and maintain supply dewpoint to control both important parameters within space, room temperature and relative humidity. The hot gas reheat coil is regulated reheating by 3 way modulating hot gas valve. The heating capacity can be selected to manage room heat load varying from 0 to 100% which is very efficient when compare to the other humidity control system. Because of this heating capacity is generted from waste heat energy. The supply air fan VSD is applied for better precise room temperature and relative humidity with minimum speed at 30%. This system is saving up to 40% when compare to conventional humidity control system such as electric heater. DX cooling coil HRU with chilled water coil A B C E D F PVR/RMC Series HRU With Chilled Water system This HRU application can be designed for minimum supply air dewpoint 7.0 o C. Chilled water coil is a pre-cool coil and controlled by 2 way valve. It is operate together with DX cooling coil to adjust and maintain supply dewpoint to control both important parameters within space, room temperature and relative humidity. The hot gas reheat coil is regulated reheating by 3 way modulating hot gas valve. The heating capacity can be selected to manage room heat load varying from 0 to 100% which is very efficient when compare to the other humidity control system. Because of this heating capacity is generted from waste heat energy. The supply air fan VSD is applied for better precise room temperature and relative humidity. Furthermore, ENERCOV's HRU series very efficient and saving up to 40-70% when compare to conventional humidity control system such as electric heater and dessicant with electric heater re-generating system.
4 Application Double DX cooling coil HRU system A OA This HRU application can be designed for minimum supply air dewpoint 8.0 o C. The first DX coil is a pre-cool coil. It is control partial load by HGBP or compressor's VSD. The firt cooling coil will operarte together with the second DX cooling coil to adjust supply dewpoint to maintain both important parameters withinspace, room temperature and relative humidity. The hot gas reheat coil of DX-2 is regulated reheating by 3 way modulating hot gas valve. The heating capacity can be designed to manage room heat load varying from 0 to 100% which is very efficient when compare to the other humidity control system. Because of this heating capacity is generted from waste heat energy.the supply air fan VSD is applied for better precise room temperature and relative humidity. Furthermore, ENERCOV's HRU series very efficient and saving up to 40-70% when compare to conventional humidity control system such as electric heater and dessicant with electric heater re-generating system. B C SA2 DX-2 SA1 Room Load Reheat (auto adj %) Psychrometric Diagram DX-1 E RAH RA D PVR/RMC Series All fresh air 100% A B C D E PVR/RMC Series APPLICATION 1. Clean room 2. Pharmaceutical 3. Biolab 4. Biological Safety Level 1-4 (BSL) 5. Hospital, ICU, OR, CCU, Isolation room, etc. 6. Factory production line 7. Telecommunication 8. Computer room 9. Animal laboratory 10. Historical, museum 11. Server room 12. Library, media resources 13. Etc. ADVANTAGE SUMMARY 1. Max cooling capacity ~ room load required. 2. Free reheat from capacity~ DX cooling capacity. 3. Energy saving >50-80%. 4. Low maintenance cost. 5. Simple mechanical installation work. 6. Low investment cost. 7. High accuracy. 8. Total control solution by DDC controller. 9. Network interfacing capability to BAS such as Siemens, Johnsan Controls, Honeywell by modbus, BACnet or Loanworks.
5 Architecture Refrigerant Diagram Type-1 ENERCOV AHU Casing Suction Hot Gas Return SUCT HGR T1 Accumulator Compressor Hot Gas Sol. Valve Check Valve DISC Remote Condenser Supply Air Fan Evaporator Reheat Coil HGBP HGS LIQ-OUT Heat Recovery Unit with on/off HGBP&Sol.V. hot gas solenoid valve. T1 LIQ-IN ENERCOV PVR-Series TXV Sight Glass Filter Drier Drain Pan Drainnage Piping 380V3Ph50Hz HRU-Series Type-1 Hot gas bypass valve is installed within compressor box and bypass discharge gas to inlet evaporator (after TXV). The two sets of solenoid valves are operated as heating and dehumidifying function. The heating coil of this type is on/off or PWM selectable. Refrigerant Diagram Type-2 Air Handling Unit ENERCOV Hot Gas Mod Valve AHU Casing Suction Hot Gas Suppy SUCT HGS T2 Accumulator Compressor DISC Remote Condenser Supply Air Fan Evaporator Reheat Coil Check Valve HGBP LIQ-OUT Heat Recovery Unit with proportional HGBP&Sol.V. hot gas valve. Check Valve T2 LIQ-IN ENERCOV PVR-Series TXV Sight Glass Filter Drier Drain Pan 380V3Ph50Hz Drainnage Piping HRU-Series Type-2 Hot gas bypass valve is installed within compressor box and bypass discharge gas to inlet evaporator (after TXV). This type is not necessary to install de- superheat TXV. The hot gas reheat coil is controlled by 3 way modulating valve and can be designed as auxiliary condenser in parallel. The maximum heating capacity of hot gas reheat coil is approximate cooling coil capacity plus compressor power input kilowatts which is about 135% of cooling capacty. Heating capacity is regulated in proportional from 0 to 100% adjustable. Temperature and relative humidity are controlled by this heat recovery system can be maintained very precisely. The condenser fan speed is varied to control high side pressure of discharge refrigerant. This type can apply for low ambient temperature at minimum -10 o C.
6 HRU Control System Hardware Feature Direct Digital Controls HRU system controller is the result of ENERCOV s years of experience in the design and develop of programmable controllers for heat recovery system for temperature and humidity control units. HRU system controller consists of programmable controllers, LCD user interfaces, completted algorithm software, all necessarily sensors, and a series of optional boards to interface to the more commonly-used Building Management Systems and a proprietary supervisory system. LCD Display HRU system controller's display provide 4 lines x 20 characters with 6 key pads. It is human interface device to access to all of HRU system parameters. Furthermore, it also display alarms, configuration, setpoint, and other menus. Sensors HRU system controller's sensor consist of room (or duct) temperature/humidity sensor, low/high refrigerant pressure transducer, supply air temperature, air on coil temperature, refrigerant suction temperature. Network Capability HRU system controller's optional interface board to BMS consists of LonWorks, Modbus, BACnet, SNMP. The controller offers solution for interfacing to each other by RS485 via PLAN or tlan network. This communication is also capable to connect to supervisory system on personel computer for more management features as per customer require. Control Functions Temperature & Humidity Controls The most important HRU system controller's algorithm is temperature and humidity controls function. It regulates compressor capacity control devices, hot gas reheat valve, and cooling coil control valve to maintain supply air dewpoint, room temperature and humidity at setting point. The FUZZY control routine adapt with PID control algorithm within HRU system controller is very powerful and accurately. Compressor Capacity Controls HRU system controller energizes hot gas bypass (HGBP) solenoid valve to reduce compressor capacity. HGBP is a mechanical device to release discharge gas back to suction section in proportinal. So, compressor will running continuousely without cycling on/off to prevent temperature and humidity fluctuation. Compressor Safety Protection Compressor safety protection devices consist of high/low pressure switch, oil diff pressure cutout switch, internal protection switch, air flow switch, return gas temperature sensor to monitor too high and too low suction temperature. Compressor will be stopped when one of protection switch energized. Refrigerant Pressure Balancing Function According to heat rejection of ENERCOV's HRU series are always vary depending on outdoor air temperature and percentage openning of hot gas reheat valve. It effects to high and low side refrigerant pressure which may cuases to compressor tripping. So, HRU system controller consists of low and high refrigerant pressure transducers to detect the actual operating value and maintain high/low pressure within compressor operating range by regulate condensing fan speed and also controls hot gas bypass valve. Alarms Function HRU system controller's will energize alarm light keypad when alarms had been occured. We can display alarm message and reset alarms by pressing alarm keypad. Setpoint Adjustment HRU system controller's can adjust all necessarily setpoints such as temperature, humidity, room pressure, and much more. Service Configuration Use for service person to access all setting and configured parameters with password to access. Sensor Calibration HRU system controller provides sensor calibration routine to compensate all sensors error. System Diagnostic HRU system controller's will recheck all its safety function before start running unit.
7 Dimension Unit Dimension in mm LP HP ELPOWER EL CONTROL LIQ-IN DISC LIQ-OUT HGBP HGS HGR (T1Only) SUCT HRU LP HP ELPOWER EL CONTROL LIQ-IN DISC LIQ-OUT HGBP HGS HGR (T1 Only) SUCT HRU
8 Enercov T1 Application
9 Enercov T2 Application
10 Product Nomenclature HRU 15/01/2007 HRU T1 Product series Nom. cooling capacity x1000 btu/h Type of application T1 - HGBP to evaporator + Hot gas reheat solenoid valve (on/off) T2 - HGBP to evaporator +3Wayhotgasmodulating valve (proportional) Best climate management system. Enercov (Thailand) Co.,Ltd. 48/259 Moo 1, Ramkhamhaeng Road, Sapnansung, Bangkok, Thailand Phone : (662) Fax : (662) Enercov Technology (Suzhou) Co.,Ltd. Block B, B6-7, Suhong Industrial Square, #81 Suhong West Road, Suzhou Industrial Park, Jiangsu, China Phone : (0512) Fax : (0512) Enercov (Singapore) PTE LTD 80 Genting Lane, #06-02 Genting Block, Ruby Industrial Complex, Singapore Phone : (65) Fax : (65) doc#
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