test report #15 system drop-in test of …...air-conditioning, heating, and refrigeration institute...

Air-Conditioning, Heating, and Refrigeration Institute (AHRI) Low-GWP Alternative Refrigerants Evaluation Program (Low-GWP AREP) TEST REPORT #15 System Drop-In Test of Refrigerant R-32 in a VRF Multi-split Heat Pump Hideki Tsujii Hiroyuki Imada DAIKIN INDUSTRIES, LTD. 1304 Kanaoka-cho, Kita-ku Sakai, Osaka 591-8511 JAPAN May 24, 2013 This report has been made available to the public as part of the author company’s participation in the AHRI’s Low-GWP AREP.

2

Low-GWP AREP SYSTEM DROP-IN TEST

1. Introduction:

This document reports the system drop-in test of R32 conducted on a 8 Ton VRF multi-split heat pump

designed for R410A (RXYQ96PBTJ / FXMQ12PVJU(2) + FXMQ18PVJU(4)) at Intertek (1809 10th St.

Suite 400, Plano, TX 75074). The baseline test of R410A was also conducted at Intertek with the same

testing units and facilities beforehand. The instrumentation and accuracies are shown on the page 19 and

20.

2. Details of Test Setup:

a. Description of System

The outdoor unit is RXYQ96PBTJ (SN: A000563) which uses an inverter-driven variable speed

and a fixed speed scroll-type compressors.

The indoor units are six of ducted fan coils, FXMQ12PVJU(2) (SN: E004602 and E004575) and

FXMQ18PVJU(4) (SN: E005852, E005714, E005715 and E005716). They use a DC fan motor

and direct drive sirocco fans.

The AHRI 1230 Directory ratings for this system are:

*1: “EER” is the system cooling efficiency and “COP” is the system heating efficiency.

b. Description of Modifications to System

The charge of R32 was optimized to 19.8 lb (8.98kg, 83.2% of R410A charge) to obtain the

maximum cooling efficiency (EER) at the standard rating cooling test conditions.

The components other than refrigerant in the system stay the same as R410A system.

c. Description of Tests Conducted

Both of the baseline R410A test and the alternative R32 test at Intertek follow AHRI 1230 and

ANSI/ASHRAE 37.

AHRI # Classifica

tion

Cooling High Heating 47F Low Heating 17F

Capacity

(Btu/h)

EER*1 IEER Capacity

(Btu/h)

COP*1 Capacity

(Btu/h)

COP*1

4677061 HMSV-

A-CB

92000 12.5 17.0 103000 3.65 67000 2.50

3

ODRXYQ96PBTJ

FC - 1FXMQ12PVJU

FC - 3FXMQ18PVJU

FC - 4FXMQ18PVJU

FC - 2FXMQ12PVJU

FC - 6FXMQ18PVJU

FC - 5FXMQ18PVJU

Figure 1. Diagram of VRF Multi-Split Heat Pump

Figure 2. Photos of the outdoor unit (left) and the indoor units (right)

4

Figure 3. Schematic diagram of VRF system drop-in test setup

Low pressure sensor

Capillary tube Capillary tube

Filter

Filter

Compressor

Fixed

Compressor

INV

High pressure switch

Filter

Solenoidvalve

Check valve

Filter

Check valve

Oil

separator

Oil

separator

High pressure switch

High pressure sensor

Four way valve

Heatexchanger

Filter

Electronic expansion valve

Pressure regulatingvalve(Check valve type)

Electronic expansionvalve

Filter

Solenoidvalve

Solenoidvalve

FusibleplugAccumulator

Filter

Capillarytube

Filter

Heat exchanger

Fan

Filter Filter

Electronicexpansion

valve

Heat exchanger

Fan

Filter Filter

Electronicexpansion

valve

Heat exchanger

Fan

Filter Filter

Electronicexpansion

valve

Heat exchanger

Fan

Filter Filter

Electronicexpansion

valve

Heat exchanger

Fan

Filter Filter

Electronicexpansion

valve

Heat exchanger

Fan

Filter Filter

Electronicexpansion

valve

5

3. Results:

a. Data Form

Please see data forms of steady state test in the following pages.

The R32 properties come from Refprop 8 directly from NIST.

b. Conclusions

� R32 makes performance higher with 83% of R410A charge in case of using the existing

R410A system.

� R32 cooling capacity is 2.9% higher and EER is 6.4% higher than R410A at the standard

rating cooling conditions.

� R32 IEER is 9.5% higher than R410A. R32 part-load performance is even higher than

R410A.

� R32 high and low temperature heating capacities are 4.8% and 2.4% higher than R410A

respectively.

� R32 contributes to improvement in both capacity and EER/COP, but R32 discharge

temperature is higher than R410A as shown in Figure 5.

Figure 4. Capacity and EER/COP of R32 improvement over R410A

R32 improvement

2.9%

4.8%

2.4%

6.4%

9.5%

0.1%

1.6%

0.0%

2.0%

4.0%

6.0%

8.0%

10.0%

12.0%

Standard Cooling IEER High TempHeating

Low TempHeating

Capacity

EER/COP

6

Figure 5. Compressor discharge temperature of R32 vs. R410A

Compressor discharge temperature (ﾟF)

165

135 138

191

155165

0

50

100

150

200

250

Standard Cooling High Temp Heating Low Temp Heating

R410A

R32

Base. Alt. SI Units Base. Alt. IP Units Ratio

Cooling

Scroll Scroll

0.22 /

0.18

0.22 /

0.18m

3/min

6.19 /

7.85

6.19 /

7.85ft

3/min 1

N/A N/A hp

Variable Variable rpm

EXV EXV

1.8 1.8 liters 60.9 60.9 fl.oz. 1

23.8 19.8 kg 52.4 43.6 lb 0.83

kg/min lb/min

% wt

db 26.5 26.7 C 79.7 80.0 F

wb 19.4 19.6 C 66.9 67.2 F

db 35.0 35.0 C 95.0 95.0 F

wb 17.4 19.1 C 63.4 66.3 F

26343 27106 W 89881 92484 Btu/h 1.03

20775 20596 W 70885 70274 Btu/h 0.99

7309 7068 W 7309 7068 W 0.97

6922.5 6692.7 W 6923 6693 W 0.97

3.60 3.84 W/W 12.30 13.09 Btu/h/W 1.06

N/A N/A W/W

Other System Changes

Base. Alt. Ratio

18.9 20.7 1.10

Low-GWP AREP SYSTEM DROP-IN TEST DATA FORM

System Data

Integrated Energy Efficiency Ratio - IEER

Sensible Capacity

Total System Power Input

OD Unit Power Input

Energy Efficiency Ratio (EER)

Coeff. Of Performance (COP)

R32

FVC68D

R410A & FVC68D

OD: RXYQ96PBTJ

ID: FXMQ12PVJU(2), FXMQ18PVJU(4)

Rated Cooling Capacity: 92,000 Btu/h

Total Capacity

Make and Model of System

Nominal Capacity and Type of System

In -

door

Manufacturer: Daikin Manufacturer's Notation: Standard Rating Cooling Test

Basic Information

Alternative Refrigerant (If not proprietary, composition as

Charged, % wt)

Alternative Lubricant Type and ISO Viscosity

Baseline Refrigerant and Lubricant

Refrigerant Charge

Refrigerant Mass Flow Rate

Composition, at compr. Inlet

if applicable

Ambient

Temps. Out -

door

Nominal Motor Size

Motor Speed

Expansion Device Type

Lubricant Charge

Comparison Data

Mode (Heating/Cooling)

Compressor Type

Compressor Displacement

(Inverter driven / fixed speed)

7


(e.g. SSHP, window RAC, chiller, etc.) (and composition as charged, % weight, if not proprietary)


Air Air

85.46 82.23 m3/min 3018 2904 SCFM 0.96

26.5 26.7 C 79.7 80.0 F

14.8 14.7 C 58.7 58.4 F

Air Air

N/A N/A m3/min N/A N/A SCFM N/A

35.0 35.0 C 95.0 95.0 F


T (C) P [kPa] T (C) P [kPa] T (F) P [psig] T (F) P [psig]

16.4 1019 18.87 1049 61.6 147.7 66.0 152.2

74.0 2695 88.18 2769 165.2 390.8 190.7 401.6

2695 2769 390.8 401.6

35.7 35.8 96.2 96.4

N/A N/A N/A N/A

12.4 12.33 54.3 54.2

13.6 13.37 56.5 56.1

1.21 N/A 1.04 N/A 2.18 N/A 1.87 N/A

Additional Notes

Evap. Superheat

Subcooling, at

expan. device

Evaporator Inlet

Evaporator Outlet

Comp. Discharge

Condenser Inlet

Condenser Outlet

Expan. Device Inlet

Alternative Alternative

Compressor Suction

Air/Water Side Data

Evaporator

Refrigerant Side

Data T & P

Baseline

Heat Exchange Fluid

Flow Rate (air side)

Inlet Temperature

Data Source(s) for Refrigerant Properties

Alternate Refrigerant: R32Type of System: Air-source VRF HP

Heat Exchange Fluid

Outlet Temperature

Inlet Temperature

Outlet Temperature

Condenser


Baseline

8


Cooling

Scroll Scroll

0.22 /

0.18

0.22 /

0.18m

3/min

6.19 /

7.85

6.19 /

7.85ft

3/min 1

N/A N/A hp


EXV EXV

1.8 1.8 liters 60.9 60.9 fl.oz. 1

23.8 19.8 kg 52.4 43.6 lb 0.83

kg/min lb/min

% wt

db 26.5 26.7 C 79.7 80.0 F

wb 19.5 19.5 C 67.1 67.1 F

db 27.4 27.5 C 81.4 81.5 F

wb 13.8 15.8 C 56.8 60.5 F

21098 20432 W 71986 69714 Btu/h 0.97

18320 18264 W 62509 62318 Btu/h 1.00

3959 3631 W 3959 3631 W 0.92

3571.7 3248.1 W 3572 3248 W 0.91

5.33 5.63 W/W 18.19 19.20 Btu/h/W 1.06

N/A N/A W/W


Base. Alt. Ratio

18.9 20.7 1.10

Comparison Data


Compressor Type



Nominal Motor Size

Motor Speed


Lubricant Charge



if applicable

Ambient

Temps. Out -

door



In -

door

Manufacturer: Daikin Manufacturer's Notation: 75% Part-Load Cooling Test

Basic Information


Charged, % wt)



Refrigerant Charge



R32

FVC68D

R410A & FVC68D

OD: RXYQ96PBTJ



Total Capacity


System Data


Sensible Capacity


OD Unit Power Input

9




Air Air

85.20 84.19 m3/min 3009 2973 SCFM 0.99

26.5 26.7 C 79.7 80.0 F

16.1 16.2 C 61.1 61.2 F

Air Air


27.4 27.5 C 81.4 81.5 F



16.8 1100 16.2 1138 62.2 159.6 61.1 165.0

59.2 2312 65.6 2350 138.6 335.3 150.0 340.7

2312 2350 335.3 340.7

30.1 29.9 86.2 85.8

N/A N/A N/A N/A

13.8 14.3 56.8 57.7

14.7 15.1 58.5 59.2

0.94 N/A 0.82 N/A 1.69 N/A 1.48 N/A

Additional Notes



Heat Exchange Fluid

Outlet Temperature

Inlet Temperature

Outlet Temperature

Condenser


Baseline Alternative

Compressor Suction

Air/Water Side Data

Evaporator

Refrigerant Side

Data T & P

Baseline

Heat Exchange Fluid


Inlet Temperature

Condenser Inlet

Condenser Outlet

Expan. Device Inlet

Alternative

Subcooling, at

expan. device

Evaporator Inlet

Evaporator Outlet

Comp. Discharge

Evap. Superheat

10


Cooling

Scroll Scroll

0.22 /

0.18

0.22 /

0.18m

3/min

6.19 /

7.85

6.19 /

7.85ft

3/min 1

N/A N/A hp


EXV EXV

1.8 1.8 liters 60.9 60.9 fl.oz. 1

23.8 19.8 kg 52.4 43.6 lb 0.83

kg/min lb/min

% wt

db 26.5 26.7 C 79.7 80.0 F

wb 19.4 19.4 C 67.0 67.0 F

db 19.9 20.0 C 67.8 68.0 F

wb 12.6 12.6 C 54.7 54.7 F

14874 13719 W 50750 46809 Btu/h 0.92

13537 12709 W 46189 43364 Btu/h 0.94

2377 1980 W 2377 1980 W 0.83

1990.3 1598.9 W 1990 1599 W 0.80

6.26 6.93 W/W 21.35 23.64 Btu/h/W 1.11

N/A N/A W/W


Base. Alt. Ratio

18.9 20.7 1.10


System Data


Sensible Capacity


OD Unit Power Input



R32

FVC68D

R410A & FVC68D

OD: RXYQ96PBTJ



Total Capacity



In -

door


Basic Information


Charged, % wt)



Refrigerant Charge



if applicable

Ambient

Temps. Out -

door

Nominal Motor Size

Motor Speed


Lubricant Charge

Comparison Data


Compressor Type



11




Air Air

84.93 83.68 m3/min 2999 2955 SCFM 0.99

26.5 26.7 C 79.7 80.0 F

18.8 19.3 C 65.9 66.8 F

Air Air


19.9 20.0 C 67.8 68.0 F



20.5 1213 20.1 1285 68.9 175.9 68.2 186.3

55.1 2247 54.4 2136 131.2 325.8 130.0 309.7

2247 2136 325.8 309.7

23.3 28.4 74.0 83.0

N/A N/A N/A N/A

16.6 17.8 61.9 64.0

18.3 18.6 65.0 65.4

1.70 N/A 0.77 N/A 3.06 N/A 1.39 N/A

Additional Notes

Evap. Superheat

Subcooling, at

expan. device

Evaporator Inlet

Evaporator Outlet

Comp. Discharge

Condenser Inlet

Condenser Outlet

Expan. Device Inlet


Compressor Suction

Air/Water Side Data

Evaporator

Refrigerant Side

Data T & P

Baseline

Heat Exchange Fluid


Inlet Temperature



Heat Exchange Fluid

Outlet Temperature

Inlet Temperature

Outlet Temperature

Condenser


Baseline

12


Cooling

Scroll Scroll

0.22 /

0.18

0.22 /

0.18m

3/min

6.19 /

7.85

6.19 /

7.85ft

3/min 1

N/A N/A hp


EXV EXV

1.8 1.8 liters 60.9 60.9 fl.oz. 1

23.8 19.8 kg 52.4 43.6 lb 0.83

kg/min lb/min

% wt

db 26.5 26.7 C 79.7 80.0 F

wb 19.5 19.5 C 67.0 67.1 F

db 18.3 18.3 C 64.9 65.0 F

wb 12.0 11.5 C 53.6 52.6 F

7518 6563 W 25651 22392 Btu/h 0.87

6288 5435 W 21456 18544 Btu/h 0.86

1131 948 W 1131 948 W 0.84

748.1 569.9 W 748 570 W 0.76

6.65 6.92 W/W 22.68 23.62 Btu/h/W 1.04

N/A N/A W/W


Base. Alt. Ratio

18.9 20.7 1.10

Comparison Data


Compressor Type



Nominal Motor Size

Motor Speed


Lubricant Charge



if applicable

Ambient

Temps. Out -

door



In -

door


Basic Information


Charged, % wt)



Refrigerant Charge



R32

FVC68D

R410A & FVC68D

OD: RXYQ96PBTJ



Total Capacity


System Data


Sensible Capacity


OD Unit Power Input

13




Air Air

83.91 82.61 m3/min 2963 2918 SCFM 0.98

26.5 26.7 C 79.7 80.0 F

22.9 23.5 C 73.2 74.3 F

Air Air


18.3 18.3 C 64.9 65.0 F



22.3 1388 22.8 1448 72.2 201.2 73.1 209.9

42.1 1921 40.9 1821 107.7 278.6 105.6 264.1

1921 1821 278.6 264.1

23.5 25.1 74.3 77.2

N/A N/A N/A N/A

20.9 21.7 69.5 71.0

23.0 23.5 73.3 74.4

2.10 N/A 1.86 N/A 3.78 N/A 3.35 N/A

Additional Notes



Heat Exchange Fluid

Outlet Temperature

Inlet Temperature

Outlet Temperature

Condenser



Compressor Suction

Air/Water Side Data

Evaporator

Refrigerant Side

Data T & P

Baseline

Heat Exchange Fluid


Inlet Temperature

Condenser Inlet

Condenser Outlet

Expan. Device Inlet

Alternative

Subcooling, at

expan. device

Evaporator Inlet

Evaporator Outlet

Comp. Discharge

Evap. Superheat

14


Heating

Scroll Scroll

0.22 /

0.18

0.22 /

0.18m

3/min

6.19 /

7.85

6.19 /

7.85ft3/min 1

N/A N/A hp


EXV EXV

1.8 1.8 liters 60.9 60.9 fl.oz. 1

23.8 19.8 kg 52.4 43.6 lb 0.83

kg/min lb/min

% wt

db 21.1 21.1 C 69.9 70.0 F

wb 12.1 12.1 C 53.8 53.7 F

db 8.6 8.3 C 47.4 47.0 F

wb 6.2 6.1 C 43.2 43.0 F

28963 30346 W 98823 103541 Btu/h 1.05

28963 30346 W 98823 103541 Btu/h 1.05

8320 8705 W 8320 8705 W 1.05

7897.8 8290.8 W 7898 8291 W 1.05

W/W

3.48 3.49 W/W 1.00


Base. Alt. Ratio

N/A N/A N/A

Comparison Data


Compressor Type



Nominal Motor Size

Motor Speed


Lubricant Charge



if applicable

Ambient

Temps. Out -

door



In -

door

Manufacturer: Daikin Manufacturer's Notation: High Temperature Heating Test

Basic Information


Charged, % wt)



Refrigerant Charge



R32

FVC68D

R410A & FVC68D

OD: RXYQ96PBTJ


Rated High T. Heating Cap: 103,000 Btu/h

Total Capacity


System Data


Sensible Capacity


OD Unit Power Input

15




Air Air

100.50 97.38 m3/min 3549 3439 SCFM 0.97

21.1 21.1 C 69.9 70.0 F

35.2 36.4 C 95.4 97.6 F

Air Air


8.6 8.3 C 47.4 47.0 F



-1.3 666 -1.2 685 29.6 96.6 29.8 99.3

57.4 2275 68.4 2361 135.2 329.9 155.1 342.3

48.7 55.6 119.7 132.1

32.6 33.0 90.7 91.5

N/A N/A N/A N/A

1.1 0.4 33.9 32.7

N/A N/A N/A N/A

N/A N/A N/A N/A N/A N/A N/A N/A

Additional Notes



Heat Exchange Fluid

Outlet Temperature

Inlet Temperature

Outlet Temperature

Condenser



Compressor Suction

Air/Water Side Data

Evaporator

Refrigerant Side

Data T & P

Baseline

Heat Exchange Fluid


Inlet Temperature

Condenser Inlet

Condenser Outlet

Expan. Device Inlet

Alternative

Subcooling, at

expan. device

Evaporator Inlet

Evaporator Outlet

Comp. Discharge

Evap. Superheat

16


Heating

Scroll Scroll

0.22 /

0.18

0.22 /

0.18m

3/min

6.19 /

7.85

6.19 /

7.85ft3/min 1

N/A N/A hp


EXV EXV

1.8 1.8 liters 60.9 60.9 fl.oz. 1

23.8 19.8 kg 52.4 43.6 lb 0.83

kg/min lb/min

% wt

db 21.1 21.1 C 69.9 70.0 F

wb 12.7 12.6 C 54.9 54.7 F

db -8.1 -8.3 C 17.4 17.0 F

wb -9.4 -9.5 C 15.2 14.8 F

19327 19796 W 65944 67545 Btu/h 1.02

19327 19796 W 65944 67545 Btu/h 1.02

7838 7902 W 7838 7902 W 1.01

7413.4 7487.5 W 7413 7488 W 1.01

W/W

2.47 2.51 W/W 1.02


Base. Alt. Ratio

N/A N/A N/A


System Data


Sensible Capacity


OD Unit Power Input



R32

FVC68D

R410A & FVC68D

OD: RXYQ96PBTJ


Rated Low T. Heating Cap: 67,000 Btu/h

Total Capacity



In -

door

Manufacturer: Daikin Manufacturer's Notation: Low Temperature Heating Test

Basic Information


Charged, % wt)



Refrigerant Charge



if applicable

Ambient

Temps. Out -

door

Nominal Motor Size

Motor Speed


Lubricant Charge

Comparison Data


Compressor Type



17




Air Air

101.08 97.78 m3/min 3570 3453 SCFM 0.97

21.1 21.1 C 69.9 70.0 F

30.4 31.0 C 86.8 87.9 F

Air Air


-8.1 -8.3 C 17.4 17.0 F



-15.3 382 -15.2 390 4.4 55.5 4.6 56.6

59.0 1996 73.9 2021 138.1 289.4 165.0 293.1

44.9 49.6 112.8 121.3

26.8 26.7 80.2 80.1

N/A N/A N/A N/A

-13.4 -13.9 8.0 7.0

N/A N/A N/A N/A

N/A N/A N/A N/A N/A N/A N/A N/A

Additional Notes

Evap. Superheat

Subcooling, at

expan. device

Evaporator Inlet

Evaporator Outlet

Comp. Discharge

Condenser Inlet

Condenser Outlet

Expan. Device Inlet


Compressor Suction

Air/Water Side Data

Evaporator

Refrigerant Side

Data T & P

Baseline

Heat Exchange Fluid


Inlet Temperature



Heat Exchange Fluid

Outlet Temperature

Inlet Temperature

Outlet Temperature

Condenser


Baseline

18

Instrumentation and accuracies

19

Instrumentation and accuracies (continued)

20

test report #15 system drop-in test of …...air-conditioning, heating, and refrigeration institute...

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