Design, Installation and Testing of the VRF System
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The document provides details about the design, installation, and testing of a VRF air conditioning system at the TK Royal One building in Cambodia. [1] It describes the components of a Panasonic VRF system, including outdoor units, indoor units, and compressor types. Load calculations were performed using estimation and manual methods to determine a total cooling load of 109.8kW was required. [2] An outdoor unit model U-40ME2R8 with 113kW maximum cooling capacity was selected. Four indoor ducted units were chosen for the conference hall. [3] The installation process for air ducts, copper pipes, drain pipes, and outdoor/indoor units is
![IV. Load Calculation
1. Estimate Method
Q = S . R
• Q: Total heat load [Btu.h-1]or [W]
• S: room area [m2]
• R: The rate of cooling [Btu.h-1.m-2]
Calculation total heating load for TKR1 “ Reception
room’’ which has S = 62.4 m2
• R = 900 Btu.h-1.m-2
Thus, Q = 56160 Btu.h−1 =16.45kW
16](https://image.slidesharecdn.com/slide-for-my-presentation-180723051208/85/Design-Installation-and-Testing-of-the-VRF-System-16-320.jpg)
![IV. Load Calculation
2. Manual Method
The Manual Method is the method used to calculate the cooling load
of the building space with minimum errors.
Total heating load:
QT = QS + QL [W]
oTotal sensitive loads
QS = QStr+ QSRm+QSRv+QSoc+QSecl+QSequip
oTotal latent loads
QL= QLr+ QLoc+QLequip
18](https://image.slidesharecdn.com/slide-for-my-presentation-180723051208/85/Design-Installation-and-Testing-of-the-VRF-System-18-320.jpg)
![IV.Load Calculation
Verify the cooling capacity coefficient R [Btu/h.m2]:
• Manul method: R= 53367Btu.h−1 / 62.4 m2 = 855 Btu.h−1
• Estimate method: R = 900 Btu.h−1
From the calculation above by manual method, we see that
error of cooling rate approximate 5 % compared to
estimation method
20](https://image.slidesharecdn.com/slide-for-my-presentation-180723051208/85/Design-Installation-and-Testing-of-the-VRF-System-20-320.jpg)
Design, Installation and Testing of the VRF System
- 1. MINISTRY OF EDUCATION OF YOUTHS AND SPORTS INSTITUTE OF TECHNOLOGY OF CAMBODIA DEPARTMENT OF INDUSTRIALAND MECHANICAL FINAL YEAR THESIS Tittle: Designing, Installation and Testing of VRF System Students : TITH Sopheara and VENG Socheat Specialty : Mechanical engineering Advisor : Mr. KHOUN Rithymean Academic Year : 2016- 2017 1
- 2. Contents I. General Introduction II. Definition III. Panasonic VRF system IV. Load calculation V. Selection VI. VRF system installation VII. Testing and Commissioning VIII.Conclusion 2
- 3. I. General Introduction Presentation of Internship •From: 20 February to 20 May 2017 •Company: Comin Khmere •Position : MVAC trainee •Project: TK Royal One (Cambodia) 3
- 4. II. Definition 4 What is VRF systems? • Variable refrigerant flow vary the flow of refrigerant to indoor units based on demand. There are 2 types of VRF system, heat pump and heat recovery system.
- 5. What is VRF Heat pump ? • VRF heat pump provide heating or cooling but not simultaneous heating and cooling 5 II. Definition
- 6. What is VRF heat recovery? • VRF heat recovery can operate simultaneous in heating or cooling mode. 6 II. Definition
- 7. Variable refrigerant flow (VRF) is an air-conditioning system configuration where there is one outdoor unit and multiple indoor units. III. Panasonic VRF System 7
- 8. III. Panasonic VRF System 1. Outdoor unit The outdoor unit of VRF system, sometimes called the outside unit or condenser. 8 (Carin, 2016)
- 9. III. Panasonic VRF System DC twin rotary compressor: The component of compressor are: 1. Electric motor 2. Compression mechanism 3. Accumulator The compressor is the heart of the refrigeration cycle. 9 (Bhatia, 2014)
- 10. III.Panasonic VRF System a. 2-WAY Mini-FSV LE1 Series Use for cooling or heating mode only Capacity range from 4HP to 6HP COP: 4.21 in case of 4 HP Cooling operation possible up to 46 °C And low as -20 °C for heating mode Max connectable 9 units with length 150m 10 (Hiong, 2016-2017)
- 11. III.Panasonic VRF System b. 2-WAY FSV-EX ME2 Series Use for cooling or heating mode only Capacity range from 8HP to 80HP Operation temperature as high as 52°C for cooling and as low as -20 °C for heating mode Max connectable 64 units with max length 1,000m 11 (Hiong, 2016-2017)
- 12. III.Panasonic VRF System c. 3-WAY FSV MF2 Series Using for simultaneous heating and cooling Capacity range from 8HP to 42HP Temperature operation as high as 46°C for cooling and as low as -20 for heating Max connectable 52 units with pipe length up to 500m 12 (Hiong, 2016-2017)
- 13. III.Panasonic VRF System 2. Indoor unit There are many types of indoor units such as: • F2 type : Cooling Capacity 2.2kW to 16kW • M1 type : Cooling Capacity 2.2kW up to 5.6kW • Z1 type : Cooling Capacity 2.2kW to 7.3kW • E2 type : Cooling Capacity 18kW to 28kW 13
- 14. III.Panasonic VRF System 2. Indoor unit • E1 type : Cooling Capacity 7.3kW to 28kW • U1 type : 4-way cassette, Cooling Capacity 2.2kW to 16kW • Y2 type : 4-way mini cassette, Cooling Capacity 2.2kW to 5.6kW • L1 type : 2-way cassette, Cooling Capacity 2.2kW to 7.3kW • D1 type : 1-way cassette, Cooling Capacity 2.8kW to 7.3kW • P1 type : Floor standing, Cooling Capacity 2.2kW to 7.3kW 14
- 15. IV.Load Calculation Feature of the Building TK Royal One 15http://www.cambodiancondos.com/condo-developments/tk-royal-one/
- 16. IV. Load Calculation 1. Estimate Method Q = S . R • Q: Total heat load [Btu.h-1]or [W] • S: room area [m2] • R: The rate of cooling [Btu.h-1.m-2] Calculation total heating load for TKR1 “ Reception room’’ which has S = 62.4 m2 • R = 900 Btu.h-1.m-2 Thus, Q = 56160 Btu.h−1 =16.45kW 16
- 17. Another room calculate by Estimate method Items Type of Room AREA Ratio Cooling Capacity m² Btu/h.m2 kW Btu/h 1 Conference Hall 265.45 1200 93.36 318540 2 Break Room 49.07 750 10.78 36802 3 Coffee Shop 73.6 1300 28.04 95680 4 Financial Office 98.14 850 24.48 83419 5 Hall 35.5 700 7.28 24850 6 Office 56.5 850 14.07 48025 7 Meeting Room 31.95 900 8.40 28755 8 Service Counter 36.8 1300 14.02 47840 9 Shop 87.7 800 20.56 70160 10 Toilet 38 500 5.56 19000 17
- 18. IV. Load Calculation 2. Manual Method The Manual Method is the method used to calculate the cooling load of the building space with minimum errors. Total heating load: QT = QS + QL [W] oTotal sensitive loads QS = QStr+ QSRm+QSRv+QSoc+QSecl+QSequip oTotal latent loads QL= QLr+ QLoc+QLequip 18
- 19. IV.Load Calculation Calculation heating load for TKR1 “ Reception Area’’ oTotal sensitive loads QS = 14445.26 W oTotal latent loads QL = 1197.58W Total heating load: QT= 14445.26 W + 1197.58W = 15642.84 W = 15.64 kW 19
- 20. IV.Load Calculation Verify the cooling capacity coefficient R [Btu/h.m2]: • Manul method: R= 53367Btu.h−1 / 62.4 m2 = 855 Btu.h−1 • Estimate method: R = 900 Btu.h−1 From the calculation above by manual method, we see that error of cooling rate approximate 5 % compared to estimation method 20
- 21. V. Selection 1. Selection indoor unit The total cooling load required is 109.8 kW 21(Hiong, 2016-2017)
- 22. V. Selection The characteristic of outdoor unit model U-40ME2R8 are: • Cooling capacity 113 kW • Using with power supply 400/415 V/3-phase/50 Hz • Electrical rating for cooling option: 57.3 A • Refrigerant amount at shipment: 22.0 kg • Air flowrate: 48600 m3 h-1 22
- 23. V. Selection 2. Selection indoor unit For Conference Hall of TKR1: The requirement of cooling load is 93.36 kW. Catalogue of model mid static duct E1 type chosen that Its cooling capacity from 7.3 kW to 28 kW. E1 type is a kind of saving energy, the power input 45% less (compared to H1 type) 4 of S-224ME1E5 were chosen: Cooling capacity 4 × 22.4kW = 89.6kW 23
- 25. VI.VRF System Installation 1. Air duct installation 25 2. Indoor unit installation
- 26. VI.VRF System Installation 3. Copper pipe installation 26
- 27. VI.VRF System Installation 4. Drainage water pipe installation 27
- 28. VI.VRF System Installation 5. Outdoor unit installation 28
- 29. VII. Testing and Commissioning Before we start operation VRF, we have to: 1. Test refrigerant pipe 2. Adding refrigerant 3. Check at main power on 4. Testing and commissioning 29
- 30. 30 1. Test refrigerant pipe a. Check for any leakage in the refrigerant piping b. Perform vacuum drying to remove all moisture
- 31. • Keeping the valve of the outdoor unit closed • If the specified amount of refrigerant cannot be charged, fully open the valves of the outdoor unit at liquid and gas sides, operate the air conditioner in COOL mode 31 2. Adding refrigerant
- 32. Check on the outdoor unit Check on the setting indoor unit 32 3. Check at main power on a. Check ON the rotary switches of outdoor unit b. Check ON the setting indoor unit
- 33. • Incoming supply for outdoor phrase sequence for 3 phases, Incoming Voltage (380~415V). • Incoming voltage for Indoor 220~240V and ensure power supply all Indoor unit is turn "ON". • Once all the setting is set and check, then start addressing the system by short-circuit pin CN-30 33 4. Testing and commissioning
- 34. 34 Start addressing the system by short-circuit pin CN-30 Laptop - Window 7 professional – 32 or 64 bits operation system Normal USB Printer Wire Panasonic Flash Writer – 8F000900210 / Part Code – 6233214375 To be purchase from Panasonic (Oudom, 2017)
- 35. 35 a. Indoor fan speed and temperature. OUTDOOR Screen INDOOR Screen b. Outdoor Compressor temperature, Gas temperature and etc. After the result have to be printed out by manufacture and to be attached in Testing and Commissioning form for VRF recording. (Oudom, 2017)
- 36. VIII. Conclusion • The calculation cooling load by estimation and manual seem a litter bit difference value. The selection of the systems that suitable for reception area and conference hall is outdoor unit model U-40ME2R8 which maximum cooling capacity is 113 kW. • To get the best result of VRF system, we have to understand about plan and condition for installation of indoor unit, outdoor unit, air duct, copper pipe, and drainage water pipe. • VRF testing and commissioning is a part which we use the method statement to carry on indoor unit, outdoor unit operation after installation. 36
- 37. Thank You For Your Attention ! Q & A 37 Thank you for your attention!!! Question?