TEST REPORT #64 - Air Conditioning, Heating and ...ahrinet.org/App_Content/ahri/files/RESEARCH/AREP_Final_Reports/AHRI... · subject to periodical calibration in accordance with EN

Air-Conditioning, Heating, and Refrigeration Institute (AHRI) Low-GWP Alternative Refrigerants Evaluation Program (Low-GWP AREP)

TEST REPORT #64 Compressor Calorimeter Test of Refrigerant DR-7 (R-454A) in a R-404A Reciprocating Compressors

Laurence Pérouffe Gaël Renevier Tecumseh Products Company 2 avenue Blaise Pascal 38090 Vaulx Milieu - France January 18, 2016 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

1. Introduction:

This report covers the calorimeter testing results of refrigerant blend DR-7 performed by

Tecumseh Products Company (Tecumseh) in the framework of the AHRI Low-GWP

AREP II study. The testing was done from June to September 2015 in Tecumseh’s ISO

17025 accredited Research and Development lab facility located in La Verpillière,

France. The refrigerant was tested with two R-404A Tecumseh reciprocating

compressors :

FH2511Z for low back pressure commercial refrigeration type application

FH4540Z for high back pressure commercial refrigeration type application

No optimization, oil or hardware changes were made to account for the alternative blend.

2. Details of Test Setup:

a. Description of Test Refrigerant-Lubricant and Charge

Refrigerant or refrigerant blend tested

o R404A supplied by Gazechim

o DR-7 supplied by Chemours

o total refrigerant charge:

Compressor

model

R-404A DR-7

Lbs Kg Lbs Kg

FH2511Z 11.2 5.1 6.2 2.8

FH4540Z 8.8 4 5.7 2.6

Lubricant

o POE oil viscosity grade 32 cSt

o FH2511Z oil charge 1625 cubic centimeter

o FH4540Z oil charge 1480 cubic centimeter

o

b. Description of Compressors

Hermetic two piston reciprocating compressors made by Tecumseh

no compressor modifications or accessories in place during test

3

Model FH2511Z FH4540Z

Application LBP HBP

S/N 54 L2114 90 145249 C 54 L2114 90 145228 C

Ambient temperature 95°F (35°C) 95°F (35°C)

Subcooling 0 K 0 K

Fan cooling yes yes

Fan airflow 530 CFM (900m3/h) 2*530 CFM (1800 m3/h)

Temperature

determination

Dew point Dew point

Motor type CSR High Start Torque CSR High Start Torque

Power supply 230V 50Hz 230V 50Hz

Phase 1 1

Displacement 4.53 cubic inch 4.53 cubic inch

c. Orientation of air flow in relation to the compressor

FH2511Z

FH4540Z

900m3/h

152mm

Fan Ø 250mm

152mm

2 fans Ø 250mm

900m3/h

4

d. Description and Size of Test Loop

The performance tests were done on a secondary fluid calorimeter on the suction side

according method A of standard NF EN 13771-1 : 2003. A direct expansion coil serves as

a primary evaporator. This evaporator is suspended in the upper part of a pressure-tight

and heat-insulated vessel. A heater is located in the base of this vessel, which is charged

with a secondary fluid so that the heater is well below the liquid surface.

As per NF EN 13771-1 : 2003 clause 4.2.2 this calorimeter is in constant use and is

subject to periodical calibration in accordance with EN ISO 9001 therefore a second

concurrent test (i.e mass flow meter) is not necessary

The refrigerant flow is controlled by a constant-pressure and heat-insulated expansion

device located close to the calorimeter. The calorimeter is insulated and exposed to the

ambient temperature surrounding the compressor ; the secondary fluid temperature is

maintained to the same temperature by varying the heater power in such a manner that

there is no heat exchange between the calorimeter and the ambient.

The suction gas temperature is adjusted to basic test condition by injecting refrigerant

collected at the condenser outlet in the suction line via an expansion device.

1 Refrigerant gas at the compressor inlet at the basic test conditions 2 Refrigerant gas at the compressor outlet 5 Refrigerant liquid at the inlet of the expansion device 6 Refrigerant gas at the outlet of the calorimeter A Compressor B Condenser C Expansion device E Heater F Calorimeter G Injection expansion device ts Temperature of the secondary fluid

5

e. Instrument uncertainties

Expanded uncertainties with a coverage factor k=2 assuring a level of confidence of 95%

Instrument Measurement Range Uncertainty

(of measurement)

Druck transducer Suction pressure 145 psi (10 bars) ± 0.92%

Druck transducer Discharge pressure 580 psi (40 bars) ± 0.92%

RTD Pt100 Temperatures 140°F (60°C) ± 0.52°F / 0.29°C

Zimmer LMG450 Power 600V 16A ± 0.5%

Calorimeter Refrigerating capacity 82 kBTU/h (24kW) ± 0.93%

f. Source of thermodynamic properties

From ASEREP32.DLL version 3.45.

g. Compressor operating conditions during test

Operating map points were measured first with R404A then with DR-7

with 10K (18°F) superheat and with fixed 20°C (68°F) suction gas

temperature according NF EN 12900: 2013.

6

3. Results

All compressor tests are performed at a dew point temperature for suction and discharge pressure conditions, per AHRI

Standard 540 requirements. This does not have an impact on comparing compressor performance between two or more

refrigerants that do not exhibit temperature glide. However, when refrigerants exhibit temperature glide, it is important to note

that actual systems operate closer to the mid-point condition. When comparing compressor performance of one refrigerant with

glide to another refrigerant without glide, or comparing two refrigerants with significantly different glides, comparison at

pressures corresponding to the midpoint of the temperature glide rather than the dew point will yield results that are more

representative of actual operation in a system.

The total temperature glide for DR-7 is 5.9K at 1 bar and 3.9K at 30 bars.

3.1. Reference measurement with R404A

3.1.1. Low Back Pressure Compressor FH2511Z

3.1.1.1. Operating map with 10K superheat (18°F)

*measured on discharge line at 6” from compressor discharge port

Table 3.1.1.1a, Measured data of LBP compressor FH2511Z, R404A, 10K superheat

°F °C °F °C °F °C °F °K °F °C °F °C °F/°K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W

95 35 -31 -35 86 30 18 10 -13 -25 239 115 0 5198 1523.439 109.1 49.47 8.9 1587.7 3.27 0.96

95 35 -13 -25 86 30 18 10 5 -15 219 104 0 9559 2801.335 190.1 86.21 10.8 2055.3 4.65 1.36

95 35 14 -10 91 33 18 10 32 0 194 90 0 19530 5723.673 372.8 169.09 14.8 2979.7 6.55 1.92

95 35 -31 -35 104 40 18 10 -13 -25 254 123 0 3728 1092.665 91.4 41.47 8.6 1506.3 2.48 0.73

95 35 -31 -35 104 40 18 10 -13 -25 256 125 0 3704 1085.421 90.8 41.21 8.6 1510.1 2.45 0.72

95 35 -31 -35 104 40 18 10 -13 -25 254 123 0 3700 1084.447 90.8 41.19 8.6 1507.8 2.45 0.72

95 35 -13 -25 104 40 18 10 5 -15 240 115 0 7464 2187.62 172.2 78.13 10.9 2090.6 3.57 1.05

95 35 14 -10 104 40 18 10 32 0 207 97 0 16888 4949.249 357.8 162.31 15.4 3111.0 5.43 1.59

95 35 -22 -30 122 50 18 10 -4 -20 261 127 0 3783 1108.582 109.4 49.62 9.6 1763.6 2.14 0.63

95 35 14 -10 122 50 18 10 32 0 224 107 0 13233 3878.151 333.0 151.06 16.0 3241.3 4.08 1.20

95 35 -4 -20 122 50 18 10 14 -10 244 118 0 7482 2192.677 201.1 91.24 12.4 2439.3 3.07 0.90

95 35 -22 -30 140 60 18 10 -4 -20 277 136 0 2265 663.8812 86.2 39.11 9.1 1641.1 1.38 0.40

95 35 -4 -20 140 60 18 10 14 -10 263 129 0 5073 1486.835 176.3 79.99 12.3 2416.2 2.10 0.62

95 35 14 -10 140 60 18 10 32 0 246 119 0 9394 2753.251 301.0 136.51 16.2 3283.4 2.86 0.84

EER COPSubcooling

temperatureCooling Capacity Mass flow Amps

Input

power

Ambient

temperature

Evaporating

temperature

Condensing

temperature

Superheating

temperature

Return Gas

Temperature

Discharge

temperature*

7

10-Coefficient polynomial equation

The coefficient data was derived from ASEVAL Software version 2.2. The coefficients are based

on dew point temperatures, with input temperatures to/tc in °C.

Capacity/Power/Mass Flow=

C1+C2*to+C3*tc+C4*to^2+C5*to*tc+C6*tc^2+C7*to^3+C8*to^2*tc+C9*to*tc^2+C10*tc^3

These coefficients are only applicable within the standard operating envelope of the compressor:

Figure 1, FH2511Z Operating Map, R404A, 10K superheat or 20°C return gas

Table 3.1.1.1b, Coefficients of LBP compressor FH2511Z, R404A, 10K superheat

Coefficient Capacity

(W)

Power

(W)

Mass Flow

(kg/h)

COP

(W/W)

C1 14369.013 3083.364 288.8910288 4.4701900

C2 546.7606 73.3954 10.2651520 0.0734044

C3 -156.7013 30.3646 -0.4864344 -0.0787708

C4 6.964887 0.966514 0.1271815 -0.0001418

C5 -4.919606 0.432859 -0.0025174 -0.0008963

C6 -0.216826 -0.199276 -0.0149688 0.0004923

C7 0.026989 0.007011 0.0005583 -0.0000031

C8 -0.046018 0.000196 -0.0000244 0.0000025

C9 -0.003879 0.001546 -0.0002736 0.0000025

C10 0.002354 -0.000078 0.0000309 -0.0000018

8

Figure 1a, FH2511Z Capacity (W), R404A, 10K superheat

Figure 1b, FH2511Z Power Input (W), R404A, 10K superheat

9

Figure 1c, FH2511Z Mass Flow (kg/s), R404A, 10K superheat

Figure 1d, FH2511Z COP (W/W), R404A, 10K superheat

10

3.1.1.2. Operating map with 20°C Return Gas Temperature (68°F)

Table 3.1.1.2a, Measured data of LBP compressor FH2511Z, R404A, 20°C RGT

Table 3.1.1.2b, Coefficients of LBP compressor FH2511Z,

R404A, 20°C RGT


95 35 -40 -40 86 30 108 60 68 20 247 120 0 4208 1233.1 65.4 29.67 8.6 1345.0 3.13 0.92

95 35 -31 -35 86 30 99 55 68 20 241 116 0 6190 1814.1 96.6 43.82 9.4 1599.1 3.87 1.13

95 35 -13 -25 86 30 81 45 68 20 220 104 0 11129 3261.6 175.4 79.54 11.1 2080.6 5.35 1.57

95 35 14 -10 86 30 54 30 68 20 192 89 0 22377 6558 360.3 163.42 14.5 2956.4 7.57 2.22

95 35 -31 -35 104 40 99 55 68 20 258 126 0 4587 1344.4 80.1 36.33 9.1 1541.6 2.98 0.87

95 35 -13 -25 104 40 81 45 68 20 239 115 0 8980 2631.9 158.6 71.93 11.2 2119.7 4.24 1.24

95 35 -40 -40 104 40 108 60 68 20 261 127 0 3106 910.3 54.1 24.55 8.5 1308.5 2.37 0.70

95 35 14 -10 104 40 54 30 68 20 208 98 0 18865 5528.9 342.1 155.16 15.2 3130.3 6.03 1.77

95 35 -22 -30 122 50 90 50 68 20 261 127 0 4851 1421.6 98.0 44.45 10.0 1782.6 2.72 0.80

95 35 -4 -20 122 50 72 40 68 20 243 117 0 9175 2688.9 188.2 85.38 12.4 2449.9 3.74 1.10

95 35 14 -10 122 50 54 30 68 20 225 107 0 15056 4412.5 315.7 143.20 15.6 3219.6 4.68 1.37

95 35 -22 -30 140 60 90 50 68 20 280 138 0 3280 961.2 80.0 36.27 9.6 1683.3 1.95 0.57

95 35 -4 -20 140 60 72 40 68 20 264 129 0 6564 1923.8 163.2 74.01 12.3 2417.5 2.72 0.80

95 35 14 -10 140 60 54 30 68 20 243 117 0 11217 3287.3 285.6 129.54 15.8 3267.8 3.43 1.01

Ambient

temperature

Evaporating

temperature

Condensing

temperature

Superheating

temperature

Subcooling

temperatureCooling Capacity

Return Gas

TemperatureCOPMass flow

Discharge

temperature*Amps

Input

powerEER


(W)

Power

(W)

Mass Flow

(kg/h)

COP

(W/W)

C1 14369.679 2553.765 279.4901940 5.1270600

C2 502.5065 48.2626 10.4675526 0.0901298

C3 -145.1798 45.3070 -0.7101379 -0.1002510

C4 5.797849 0.564216 0.1438886 0.0003057

C5 -4.524020 1.036213 -0.0181935 -0.0015710

C6 -0.235993 -0.260863 -0.0089459 0.0007675

C7 0.018827 0.005132 0.0007453 0.0000006

C8 -0.044178 0.005540 -0.0002151 -0.0000067

C9 -0.003393 -0.000484 -0.0001207 0.0000059

C10 0.001827 -0.000276 0.0000099 -0.0000032

11

Figure 2a, FH2511Z Capacity (W), R404A, 20°C RGT

Figure 2b, FH2511Z Power Input (W), R404A, 20°C RGT

12

Figure 2c, FH2511Z Mass Flow (kg/s), R404A, 20°C RGT

Figure 2d, FH2511Z COP (W/W), R404A, 20°C RGT

13

3.1.1.3. AREP test conditions for commercial refrigeration applications

Table 3.1.1.3, Measured data of LBP compressor FH2511Z, R404A, AREP rating points


95 35 -10 -23.3 120 48.9 20 11.1 10 -12.2 217 103 0 5906 1731 157.5 71.4 11.5 2189 2.70 0.79

95 35 -10 -23.3 120 48.9 40 22.2 30 -1.1 228 109 0 6788 1989 162.3 73.6 11.6 2232 3.04 0.89

95 35 -10 -23.3 120 48.9 75 41.7 65 18.3 248 120 0 7848 2300 159.5 72.4 11.7 2238 3.51 1.03

95 35 -25 -31.7 105 40.6 20 11.1 -5 -20.6 217 103 0 4310 1263 104.3 47.3 10.0 1753 2.46 0.72

95 35 -25 -31.7 105 40.6 40 22.2 15 -9.4 226 108 0 4701 1378 102.9 46.7 9.8 1727 2.72 0.80

95 35 -25 -31.7 105 40.6 90 50.0 65 18.3 252 122 0 5818 1705 104.0 47.2 9.8 1732 3.36 0.98

95 35 -40 -40.0 105 40.6 20 11.1 -20 -28.9 234 112 0 2047 600 52.4 23.8 8.7 1351 1.52 0.44

95 35 -40 -40.0 105 40.6 40 22.2 0 -17.8 239 115 0 2257 661 52.3 23.7 8.6 1327 1.70 0.50

95 35 -40 -40.0 105 40.6 105 58.3 65 18.3 260 127 0 3050 894 54.1 24.6 8.5 1294 2.36 0.69

EER COPSubcooling


Input

power

Ambient

temperature

Evaporating

temperature

Condensing

temperature

Superheating

temperature

Return Gas

Temperature

Discharge

temperature*

14


3.1.2. High Back Pressure Compressor FH4540Z


Table 3.1.2.1a, Measured data of HBP compressor FH4540Z, R404A, 10K superheat


95 35 -13 -25 86 30 18 10 5 -15 182 83 0 8783 2573.95 174.5 79.15 11.3 2096.7 4.19 1.23

95 35 -4 -20 86 30 18 10 14 -10 170 77 0 12151 3561.12 235.9 107.00 12.0 2320.4 5.24 1.53

95 35 -4 -20 105 41 18 10 14 -10 190 88 0 9231 2705.3 208.3 94.50 12.2 2364.6 3.90 1.14

95 35 5 -15 122 50 18 10 23 -5 199 93 0 9320 2731.36 243.1 110.27 13.1 2640.2 3.53 1.03

95 35 14 -10 104 40 18 10 32 0 171 77 0 17125 5018.89 363.2 164.74 14.2 2908.7 5.89 1.73

95 35 14 -10 86 30 18 10 32 0 154 68 0 21369 6262.62 395.2 179.27 13.8 2814.7 7.59 2.22

95 35 14 -10 140 60 18 10 32 0 212 100 0 8704 2550.88 278.0 126.09 14.2 2923.9 2.98 0.87

95 35 23 -5 140 60 18 10 41 5 204 96 0 12003 3517.71 368.3 167.05 15.8 3319.0 3.62 1.06

95 35 23 -5 122 50 18 10 41 5 184 84 0 17175 5033.51 419.3 190.18 15.7 3286.0 5.23 1.53

95 35 32 0 87 30 18 10 50 10 147 64 0 33475 9810.43 593.2 269.07 15.8 3306.2 10.12 2.97

95 35 32 0 106 41 18 10 50 10 163 73 0 27410 8033.04 561.2 254.58 16.5 3478.2 7.88 2.31

95 35 41 5 123 50 18 10 59 15 177 80 0 27396 8029 636.0 288.46 18.4 3930.4 6.97 2.04

95 35 41 5 140 60 18 10 59 15 193 89 0 20501 6008.31 587.7 266.57 19.1 4099.5 5.00 1.47

95 35 50 10 109 43 18 10 68 20 162 72 0 40025 11730.2 797.2 361.61 19.2 4137.4 9.67 2.84

95 35 59 15 122 50 18 10 77 25 171 77 0 41516 12167.2 909.7 412.63 21.5 4660.7 8.91 2.61

95 35 59 15 124 51 18 10 77 25 174 79 0 40378 11833.6 904.4 410.24 21.6 4694.9 8.60 2.52

95 35 59 15 141 60 18 10 77 25 189 87 0 31550 9246.53 855.3 387.94 22.6 4917.9 6.42 1.88

Input

powerEER COP

Discharge

temperature

Subcooling


Ambient

temperature

Evaporating

temperature

Condensing

temperature

Superheating

temperature

Return Gas

Temperature

15

Figure 1, FH4540Z Operating Map, R404A, 10K superheat or 20°C return gas

Table 3.1.2.1b, Coefficients of HBP compressor FH4540Z, R404A, 10K superheat


(W)

Power

(W)

Mass Flow

(kg/h)

COP

(W/W)

C1 13326.096 2508.119 268.6282308 5.2382700C2 524.7443 51.3521 9.5318809 0.1043990

C3 -66.7809 32.0033 1.1435357 -0.0866235

C4 7.797523 1.072062 0.1324144 -0.0000715

C5 -2.700976 -0.257839 0.0370149 -0.0008640

C6 -1.973267 -0.200727 -0.0415247 0.0004443

C7 0.038017 0.014613 0.0008197 -0.0000054

C8 -0.064263 -0.016387 -0.0003574 0.0000044

C9 -0.032803 0.010673 -0.0005711 -0.0000031

C10 0.011321 -0.000053 0.0001193 -0.0000017

16

Figure 3a, FH4540Z Capacity (W), R404A, 10K superheat

Figure 3b, FH4540Z Power Input (W), R404A, 10K superheat

17

Figure 3c, FH4540Z Mass Flow (kg/s), R404A, 10K superheat

Figure 3d, FH4540Z COP (W/W), R404A, 10K superheat

18


Table 3.1.2.2a, Measured data of HBP compressor FH4540Z, R404A, 20°C RGT


95 35 5 -15 123 51 63 35 68 20 229 110 0 11030 3232.48 231.0 104.78 13.0 2607.0 4.23 1.24

95 35 14 -10 122 50 54 30 68 20 217 103 0 14884 4361.94 311.2 141.18 14.2 2928.9 5.08 1.49

95 35 23 -5 122 50 45 25 68 20 205 96 0 18552 5437.03 393.3 178.38 15.4 3234.4 5.74 1.68

95 35 32 0 122 50 36 20 68 20 194 90 0 23113 6773.89 497.9 225.85 16.8 3559.8 6.49 1.90

95 35 40 4 123 51 28 16 68 20 187 86 0 27244 7984.39 604.0 273.98 18.1 3870.4 7.04 2.06

95 35 50 10 125 52 18 10 68 20 177 80 0 32200 9436.86 746.2 338.47 19.7 4253.4 7.57 2.22

95 35 59 15 124 51 9 5 68 20 171 77 0 39008 11432 911.6 413.51 21.1 4573.3 8.53 2.50

95 35 -4 -20 86 30 72 40 68 20 209 98 0 13971 4094.46 221.1 100.30 11.6 2246.7 6.22 1.82

95 35 -4 -20 86 30 72 40 68 20 208 98 0 13940 4085.45 220.7 100.10 11.6 2242.4 6.22 1.82

95 35 14 -10 104 40 54 30 68 20 199 93 0 18640 5462.74 337.1 152.91 13.8 2838.9 6.57 1.92

95 35 23 -5 140 60 45 25 68 20 224 106 0 13454 3943.12 347.7 157.73 15.6 3268.7 4.12 1.21

95 35 23 -5 140 60 45 25 68 20 224 106 0 13501 3956.65 348.3 157.98 15.6 3270.6 4.13 1.21

95 35 23 -5 140 60 45 25 68 20 223 106 0 13591 3983.02 350.9 159.18 15.7 3297.2 4.12 1.21

95 35 41 5 104 40 27 15 68 20 165 74 0 34917 10233.2 655.3 297.26 17.4 3713.1 9.40 2.76

95 35 50 10 104 40 18 10 68 20 157 69 0 41237 12085.2 791.1 358.82 18.7 4016.3 10.27 3.01

95 35 59 15 140 60 9 5 68 20 181 83 0 29492 8643.26 848.6 384.92 22.0 4775.2 6.18 1.81

95 35 59 15 105 41 9 5 68 20 150 66 0 47806 14010.5 945.4 428.82 20.2 4363.1 10.96 3.21

EER COPSubcooling


Input

power

Ambient

temperature

Evaporating

temperature

Condensing

temperature

Superheating

temperature

Return Gas

Temperature

Discharge

temperature

19

Table 3.1.2.1b, Coefficients of HBP compressor FH4540Z, R404A, 20°C RGT

Figure 4a, FH4540Z Capacity (W), R404A, 20°C RGT


(W)

Power

(W)

Mass Flow

(kg/h)

COP

(W/W)

C1 11712.109 2332.989 220.3791048 5.1250200

C2 470.7337 39.4797 9.1076040 0.0986384

C3 10.5002 33.7815 2.3357811 -0.0768698

C4 7.456463 0.489549 0.1856955 0.0003109

C5 -2.367358 0.410434 0.0554095 -0.0012542

C6 -2.839005 -0.132419 -0.0477028 0.0003275

C7 0.033223 0.004246 0.0017548 0.0000020

C8 -0.083890 -0.002788 -0.0005385 -0.0000073

C9 -0.031757 0.001918 -0.0007562 0.0000026

C10 0.013330 -0.001143 0.0000708 -0.0000015

20

Figure 4b, FH4540Z Power Input (W), R404A, 20°C RGT

Figure 4c, FH4540Z Mass Flow (kg/s), R404A, 20°C RGT

21

Figure 4d, FH4540Z COP (W/W), R404A, 20°C RGT

22


Table 3.1.1.3, Measured data of HBP compressor FH4540Z, R404A, AREP rating points

°F °C °F °C °F °C °F °K °F °C °F °C °K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W

95 35 45 7.2 130 54.4 20 11.1 65 18.3 186 86 8.3 32308 9468.64 681.9 309.3 19.2 4131.4 7.82 2.29

95 35 20 -6.7 120 48.9 20 11.1 40 4.4 189 87 0 16112 4721.9 385.4 174.8 14.9 3119.9 5.16 1.51

95 35 20 -6.7 120 48.9 40 22.3 60 15.6 206 97 0 17360 5087.8 373.0 169.2 14.9 3120.9 5.56 1.63

95 35 20 -6.7 120 48.9 45 25.0 65 18.3 209 98 0 17699 5187.2 371.4 168.5 14.9 3122.0 5.67 1.66

EER COPSubcooling


Input

power

Ambient

temperature

Evaporating

temperature

Condensing

temperature

Superheating

temperature

Return Gas

Temperature

Discharge

temperature

23

3.2. Measurement with DR-7

3.2.1. Low Back Pressure Compressor FH2511Z


Table 3.2.1.1a, Measured data of LBP compressor FH2511Z, DR-7, 10K superheat

Table 3.2.1.1b, Coefficients of LBP compressor

FH2511Z, DR-7, 10K Superheat


95 35 -31 -35 86 30 18 10 -13 -25 226 108 0 4687 1373.755 68.5 31.08 9.2 1532.8 3.06 0.90

95 35 -13 -25 86 30 18 10 5 -15 204 96 0 9630 2822.173 135.6 61.49 10.8 2005.1 4.80 1.41

95 35 -13 -25 104 40 18 10 5 -15 220 105 0 7848 2299.919 122.9 55.77 11.0 2048.7 3.83 1.12

95 35 14 -10 104 40 18 10 32 0 196 91 0 18115 5309.022 268.5 121.78 14.4 2917.7 6.21 1.82

95 35 -22 -30 104 40 18 10 -4 -20 232 111 0 5256 1540.452 84.2 38.19 9.9 1751.0 3.00 0.88

95 35 -22 -30 113 45 18 10 -4 -20 238 115 0 4410 1292.512 75.2 34.12 9.7 1735.0 2.54 0.74

95 35 -3 -20 122 50 18 10 15 -10 235 113 0 8347 2446.164 145.7 66.08 12.3 2391.8 3.49 1.02

95 35 -13 -25 122 50 18 10 5 -15 246 119 0 5679 1664.268 101.5 46.05 11.0 2012.7 2.82 0.83

95 35 14 -10 122 50 18 10 32 0 220 105 0 14663 4297.356 245.6 111.41 14.9 3037.1 4.83 1.41

95 35 14 -10 140 60 18 10 32 0 243 117 0 11054 3239.656 217.1 98.48 15.1 3089.0 3.58 1.05

95 35 -13 -25 140 60 18 10 5 -15 268 131 0 3572 1046.76 75.9 34.45 10.4 1904.8 1.88 0.55

Discharge

temperature*

Ambient

temperature

Evaporating

temperature

Condensing

temperature

Superheating

temperature

Return Gas

TemperatureEER COP

Subcooling


Input

power


(W)

Power

(W)

Mass Flow

(kg/h)

COP

(W/W)

C1 11555.303 1983.131 0.0525599 5.3987800

C2 438.1436 20.4876 0.0018976 0.1169080

C3 -31.9351 48.5836 0.0002809 -0.1071640

C4 5.482660 0.189912 0.0000239 0.0001987

C5 -1.973209 1.057029 0.0000059 -0.0021187

C6 -1.641257 -0.223301 -0.0000068 0.0009212

C7 0.021406 0.004161 0.0000001 -0.0000022

C8 -0.029920 0.002315 0.0000000 -0.0000023

C9 -0.018768 0.000207 -0.0000001 0.0000125

C10 0.007694 -0.000933 0.0000000 -0.0000042

24

Figure 5a, FH2511Z Capacity (W), DR-7, 10K Superheat

Figure 5b, FH2511Z Power Input (W), DR-7, 10K Superheat

25

Figure 5c, FH2511Z Mass Flow (kg/s), DR-7, 10K Superheat

Figure 5d, FH2511Z COP (W/W), DR-7, 10K Superheat

26


Table 3.2.1.2a, Measured data of LBP compressor FH2511Z, DR-7, 20°C RGT

Table 3.2.1.2b, Coefficients of LBP compressor FH2511Z, DR-7,

20°C RGT


95 35 -40 -40 86 30 108 60 68 20 256 124 0 3951 1158.037 46.3 20.99 8.5 1275.4 3.10 0.91

95 35 -31 -35 86 30 99 55 68 20 262 128 0 5793 1697.764 68.2 30.93 9.1 1512.0 3.83 1.12

95 35 14 -10 87 30 54 30 68 20 205 96 0 22994 6738.76 278.0 126.09 13.7 2758.0 8.34 2.44

95 35 -13 -25 88 31 81 45 68 20 248 120 0 10918 3199.775 130.6 59.22 10.9 2025.2 5.39 1.58

95 35 -13 -25 104 40 81 45 68 20 265 129 0 9182 2690.998 119.1 54.02 11.1 2050.8 4.48 1.31

95 35 -31 -35 104 40 99 55 68 20 265 130 0 4325 1267.645 55.6 25.23 8.9 1459.4 2.96 0.87

95 35 14 -10 104 40 54 30 68 20 229 110 0 19515 5719.157 258.4 117.21 14.5 2948.4 6.62 1.94

95 35 -3 -20 122 50 71 40 68 20 275 135 0 9754 2858.666 141.7 64.27 12.4 2438.3 4.00 1.17

95 35 14 -10 122 50 54 30 68 20 251 122 0 15906 4661.663 234.9 106.55 15.0 3092.6 5.14 1.51

95 35 -4 -20 140 60 72 40 68 20 294 146 0 7086 2076.656 117.9 53.48 12.2 2400.8 2.95 0.86

95 35 14 -10 140 60 54 30 68 20 275 135 0 12285 3600.475 208.3 94.49 15.4 3166.6 3.88 1.14

95 35 -22 -30 140 60 90 50 68 20 291 144 0 3111 911.644 51.2 23.21 9.6 1637.9 1.90 0.56

EER COPSubcooling


Input

power

Ambient

temperature

Evaporating

temperature

Condensing

temperature

Superheating

temperature

Return Gas

Temperature

Discharge

temperature*


(W)

Power

(W)

Mass Flow

(kg/h)

COP

(W/W)

C1 13407.383 1112.746 211.7365236 8.1448000

C2 474.9669 -61.9452 8.0517121 0.2729150

C3 -94.8319 85.7634 0.0429031 -0.2429200

C4 5.543841 -1.942397 0.1106021 0.0034146

C5 -3.458559 3.136686 -0.0072928 -0.0075993

C6 -0.853398 -0.792429 -0.0177698 0.0032046

C7 0.019416 -0.013170 0.0005564 0.0000197

C8 -0.039202 0.027617 -0.0002550 -0.0000562

C9 -0.008605 -0.012363 -0.0002060 0.0000590

C10 0.004660 0.002759 0.0000445 -0.0000170

27

Figure 6a, FH2511Z Capacity (W), DR-7, 20°C RGT

Figure 6b, FH2511Z Capacity (W), DR-7, 20°C RGT

28

Figure 6c, FH2511Z Mass Flow(kg/s), DR-7, 20°C RGT

Figure 6d, FH2511Z COP (W/W), DR-7, 20°C RGT

29


Table 3.2.1.3, Measured data of LBP compressor FH2511Z, DR7, AREP rating points


95 35 -10 -23.3 120 48.9 20 11.1 10 -12.2 241 116 0 6773 1985 117.5 53.3 11.4 2151 3.15 0.92

95 35 -10 -23.3 120 48.9 40 22.2 30 -1.1 253 123 0 7326 2147 118.4 53.7 11.3 2150 3.41 1.00

95 35 -10 -23.3 120 48.9 75 41.7 65 18.3 270 132 0 8082 2369 116.5 52.9 11.3 2141 3.77 1.11

95 35 -25 -31.7 105 40.6 20 11.1 -5 -20.6 240 115 0 4445 1303 71.8 32.6 9.6 1649 2.69 0.79

95 35 -25 -31.7 105 40.6 40 22.2 15 -9.4 248 120 0 4698 1377 71.1 32.3 9.5 1634 2.88 0.84

95 35 -25 -31.7 105 40.6 90 50.0 65 18.3 269 132 0 5570 1632 72.9 33.1 9.5 1627 3.42 1.00

95 35 -40 -40.0 105 40.6 20 11.1 -20 -28.9 245 118 0 1723 505 28.8 13.1 8.2 1184 1.46 0.43

95 35 -40 -40.0 105 40.6 40 22.2 0 -17.8 247 119 0 1893 555 29.7 13.5 8.2 1176 1.61 0.47

95 35 -40 -40.0 105 40.6 105 58.3 65 18.3 261 127 0 2647 776 34.4 15.6 8.2 1174 2.26 0.66

EER COPSubcooling


Input

power

Ambient

temperature

Evaporating

temperature

Condensing

temperature

Superheating

temperature

Return Gas

Temperature

Discharge

temperature*

30

3.2.2. High Back Pressure Compressor FH4540Z


Table 3.2.2.1a, Measured data of HBP compressor FH4540Z, DR-7, 10K Superheat

°F °C °F °C °F °K °F °C °F °C °F/°K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W

-12 -24 86 30 18 10 6 -14 210 99 0 8616 2525.08 102.1 46.33 10.1 1835.8 4.69 1.38

-3 -20 104 40 18 10 15 -10 221 105 0 9562 2802.35 124.7 56.56 11.1 2086.0 4.58 1.34

-3 -19 86 30 18 10 15 -9 200 94 0 12340 3616.53 147.1 66.71 11.1 2095.0 5.89 1.73

14 -10 86 30 18 10 32 0 177 80 0 21564 6319.65 260.5 118.14 12.8 2559.2 8.43 2.47

15 -10 140 60 18 10 33 0 242 117 0 10570 3097.81 179.2 81.29 13.4 2725.3 3.88 1.14

15 -10 104 40 18 10 33 0 196 91 0 17765 5206.27 235.2 106.70 13.1 2640.4 6.73 1.97

23 -5 140 60 18 10 41 5 232 111 0 14016 4107.66 240.5 109.10 14.8 3073.1 4.56 1.34

32 0 87 31 18 10 50 10 163 73 0 33238 9741.09 410.1 186.00 14.5 2993.6 11.10 3.25

32 0 105 40 18 10 50 10 181 83 0 28349 8308.23 384.2 174.28 15.2 3182.0 8.91 2.61

41 5 122 50 18 10 59 15 195 90 0 28912 8473.24 443.3 201.08 17.0 3623.0 7.98 2.34

41 5 140 60 18 10 59 15 216 102 0 22708 6655.14 402.4 182.51 17.8 3809.8 5.96 1.75

50 10 108 42 18 10 68 20 174 79 0 40726 11935.5 577.8 262.10 17.5 3736.1 10.90 3.19

59 15 123 50 18 10 77 25 187 86 0 41763 12239.6 668.3 303.15 19.8 4276.5 9.77 2.86

59 15 140 60 18 10 77 25 206 97 0 33639 9858.57 623.4 282.78 21.1 4569.8 7.36 2.16

EER COPSubcooling


Input

power

Evaporating

temperature

Condensing

temperature

Superheating

temperature

Return Gas

Temperature

Discharge

temperature

31

Table 3.2.2.1b, Coefficients of HBP compressor FH4540Z, DR-7, 10K Superheat

Figure 7a, FH4540Z Capacity (W), DR-7, 10K Superheat


(W)

Power

(W)

Mass Flow

(kg/h)

COP

(W/W)

C1 13515.451 2800.807 221.4263196 5.2814100

C2 555.4828 57.7123 8.4732361 0.1226270C3 -109.7421 -4.5978 -0.0072500 -0.0735996

C4 8.219854 0.890237 0.1190806 0.0002989

C5 -3.817344 -0.867886 0.0066454 -0.0009935

C6 -0.965136 0.483885 -0.0250020 0.0000777

C7 0.040335 0.012055 0.0007120 -0.0000033

C8 -0.062592 -0.017836 -0.0002506 0.0000010

C9 -0.016102 0.018835 -0.0003297 -0.0000044

C10 0.007222 -0.003795 0.0001200 0.0000014

32

Figure 7a, FH4540Z Power Input (W), DR-7, 10K Superheat

Figure 7a, FH4540Z Mass Flow (kg/s), DR-7, 10K Superheat

33

Figure 7a, FH4540Z COP (W/W), DR-7, 10K Superheat

34


Table 3.2.2.2a, Measured data of HBP compressor FH4540Z, DR-7, 20°C RGT


95 35 -3 -20 104 40 71 40 68 20 250 121 0 9980 2924.76 130.1 59.01 11.1 2084.1 4.79 1.40

95 35 14 -10 86 30 54 30 68 20 202 95 0 22219 6511.89 268.5 121.79 12.8 2560.2 8.68 2.54

95 35 14 -10 104 40 54 30 68 20 221 105 0 18339 5374.7 242.8 110.11 13.2 2668.3 6.87 2.01

95 35 15 -10 122 50 53 30 68 20 242 117 0 14234 4171.49 210.3 95.39 13.3 2689.9 5.29 1.55

95 35 15 -9 140 60 53 29 68 20 268 131 0 10416 3052.72 176.7 80.15 13.2 2685.9 3.88 1.14

95 35 32 0 93 34 36 20 68 20 185 85 0 32076 9400.6 408.6 185.35 14.9 3094.4 10.37 3.04

95 35 32 0 104 40 36 20 68 20 194 90 0 28978 8492.58 392.0 177.82 15.4 3216.7 9.01 2.64

95 35 41 5 122 50 27 15 68 20 203 95 0 29054 8514.99 445.9 202.24 17.2 3658.5 7.94 2.33

95 35 41 5 140 60 27 15 68 20 223 106 0 22943 6723.92 405.9 184.11 17.9 3838.2 5.98 1.75

95 35 50 10 95 35 18 10 68 20 163 73 0 45086 13213.5 596.6 270.60 16.9 3577.3 12.60 3.69

95 35 50 10 110 43 18 10 68 20 176 80 0 40045 11736.1 574.7 260.67 17.7 3767.1 10.63 3.12

95 35 59 15 124 51 9 5 68 20 181 83 0 41199 12074.1 663.9 301.12 19.8 4271.9 9.64 2.83

95 35 59 15 140 60 9 5 68 20 200 93 0 33550 9832.67 621.9 282.08 21.0 4551.7 7.37 2.16

EER COPSubcooling


Input

power

Ambient

temperature

Evaporating

temperature

Condensing

temperature

Superheating

temperature

Return Gas

Temperature

Discharge

temperature

35

Table 3.2.2.2b, Coefficients of HBP compressor FH4540Z, DR-7, 20°C RGT

Figure 8a, FH4540Z Capacity (W), DR-7, 20°C RGT


(W)

Power

(W)

Mass Flow

(kg/h)

COP

(W/W)

C1 13546.363 2349.304 211.9971600 5.8298900

C2 507.6628 45.7476 8.5907520 0.1201460

C3 -86.2985 20.7834 0.2743906 -0.0988760

C4 7.633842 1.204253 0.1592525 0.0004519

C5 -3.745959 -0.673312 -0.0126918 -0.0014535

C6 -1.394231 0.074196 -0.0271188 0.0005530

C7 0.045054 0.018944 0.0015093 0.0000027

C8 -0.087762 -0.029640 -0.0009252 -0.0000078

C9 -0.006242 0.019625 0.0000677 0.0000026

C10 0.009168 -0.001843 0.0001051 -0.0000016

36

Figure 8b, FH4540Z Power Input (W), DR-7, 20°C RGT

Figure 8c, FH4540Z Mass Flow (kg/s), DR-7, 20°C RGT

37

Figure 8a, FH4540Z COP (W/W), DR-7, 20°C RGT

38


Table 3.2.2.3, Measured data of HBP compressor FH4540Z, DR7, AREP rating points

°F °C °F °C °F °C °F °K °F °C °F °C °K BTU/hr W Lbm/hr Kg/hr A W BTU/Whr W/W

95 35 45 7.2 130 54.4 20 11.1 65 18.3 203 95 8.3 31603 9262 473.2 214.6 19.2 3850 8.21 2.41

95 35 20 -6.7 120 48.9 20 11.1 40 4.4 212 100 0 15805 4632 256.0 116.1 14.9 2830 5.58 1.64

95 35 20 -6.7 120 48.9 40 22.3 60 15.6 225 107 0 17221 5047 259.6 117.8 14.9 2900 5.94 1.74

95 35 20 -6.7 120 48.9 45 25.0 65 18.3 228 109 0 17644 5171 261.6 118.7 14.9 2919 6.04 1.77

EER COPSubcooling


Input

power

Ambient

temperature

Evaporating

temperature

Condensing

temperature

Superheating

temperature

Return Gas

Temperature

Discharge

temperature

39

4. Comparative Analysis

4.1. Low Back Pressure Compressor FH2511Z

4.1.1. Operating map with 10K superheat (18°F)

Tables and Figures of 4.1.1. show the deviation of DR-7 to R-404A cooling

capacity, power input, and cooling COP respectively, vs evaporating /condensing

temperature. At extreme operating conditions, testing uncertainties could lead to

higher than normal variability in reported results.

Tables 4.1.1, DR7/R404A-1, FH2511Z, 10K Superheat

°C -40 -35 -30 -25 -20 -15 -10

30 -11% -1% 3% 3% 3% 2% 1%

35 -16% -2% 4% 6% 6% 5% 3%

40 -26% -4% 5% 8% 8% 8% 6%

45 -9% 5% 10% 11% 10% 9%

50 -17% 3% 11% 13% 13% 12%

55 -1% 11% 15% 16% 15%

60 -9% 10% 17% 19% 19%

°C -40 -35 -30 -25 -20 -15 -10

30 -10% -7% -5% -5% -6% -8% -10%

35 -12% -8% -5% -5% -5% -7% -9%

40 -14% -9% -6% -5% -5% -6% -7%

45 -10% -6% -5% -4% -5% -6%

50 -12% -7% -5% -4% -4% -5%

55 -9% -6% -4% -4% -5%

60 -10% -6% -5% -4% -4%

°C -40 -35 -30 -25 -20 -15 -10

30 -2% 6% 9% 9% 10% 11% 12%

35 -5% 6% 10% 11% 12% 12% 13%

40 -14% 5% 11% 13% 14% 14% 15%

45 2% 12% 15% 16% 16% 16%

50 -6% 11% 16% 18% 18% 18%

55 8% 17% 20% 21% 21%

60 2% 18% 23% 24% 24%

To

Tc

COP

To

Tc

COOLING CAPACITY

To

Tc

POWER INPUT

40

Figures 4.1.1, DR7/R404A-1, FH2511Z, 10K Superheat

41

4.1.2. Operating map with 20°C Return Gas Temperature (68°F)





COOLING CAPACITY

To

°C -40 -35 -30 -25 -20 -15 -10

30 -10% -4% -1% 0% 1% 1% 1% 35 -13% -5% -1% 1% 2% 2% 2% 40 -17% -6% -1% 1% 2% 3% 3%

Tc 45 -8% -2% 2% 3% 4% 4% 50 -11% -3% 2% 4% 5% 5% 55 -4% 2% 5% 6% 7% 60 -6% 2% 6% 7% 8%

POWER INPUT

To

°C -40 -35 -30 -25 -20 -15 -10

30 -6% -5% -3% -2% -2% -4% -7% 35 -7% -6% -4% -3% -3% -4% -6% 40 -7% -6% -5% -4% -3% -4% -5%

Tc 45 -6% -5% -4% -3% -4% -5% 50 -5% -5% -4% -3% -3% -4% 55 -4% -4% -3% -3% -4% 60 -2% -3% -2% -3% -3%

COP

To

°C -40 -35 -30 -25 -20 -15 -10

30 -4% 0% 2% 2% 3% 5% 9% 35 -6% 1% 3% 4% 5% 6% 9% 40 -10% 0% 4% 5% 6% 7% 9%

Tc 45 -2% 4% 6% 7% 8% 10% 50 -6% 3% 6% 8% 9% 10% 55 0% 6% 8% 10% 11% 60 -4% 4% 8% 10% 12%

Tables 4.1.2, DR7/R404A-1, FH2511Z, 20°C RGT

42

Figures 4.1.2, DR7/R404A-1, FH2511Z, 20°C RGT

-20%

-18%

-16%

-14%

-12%

-10%

-8%

-6%

-4%

-2%

0%

2%

4%

6%

8%

10%

-45 -40 -35 -30 -25 -20 -15 -10 -5

DR

7 /

R4

04

A (

%)

Evaporating Temperature (°C)

Cooling Capacity

TC 30°C

TC 40°C

TC 50°C

TC 55°C

-20%

-15%

-10%

-5%

0%

5%

10%

15%

20%

25%

-45 -40 -35 -30 -25 -20 -15 -10 -5

DR

7 /

R4

04

A (

%)


COP

TC 30°C

TC 40°C

TC 50°C

Tc 55°C

43

4.1.3. Discharge temperature with 10K superheating

R404A – Discharge temperature (°C)

DR7 – Discharge temperature (°C)

°C -40 -35 -30 -25 -20 -15 -10

30 102 96 90 85 80 76 72

35 105 100 94 89 84 80 77

40 110 104 99 94 89 85 82

45 109 104 99 94 90 87

50 116 110 104 99 95 92

55 117 111 105 101 97

60 124 118 112 106 102

To

Tc

°C -40 -35 -30 -25 -20 -15 -10

30 115 112 107 101 95 90 87

35 118 116 112 106 101 96 92

40 122 121 117 112 107 102 98

45 126 123 118 113 108 104

50 131 128 124 119 114 110

55 133 129 125 120 116

60 138 134 130 125 121

To

Tc

44

4.2. High Back Pressure Compressor FH4540Z

4.2.1. Operating map with 10K superheat (18°F)





Tables 4.2.1, DR7/R404A-1, FH4540Z, 10K Superheat

°C -25 -20 -15 -10 -5 0 5 10 15

30 -14% -10% -8% -6% -4% -3% -2% -1% 0%

35 -13% -10% -8% -6% -4% -3% -2% -1% 0%

40 -9% -7% -5% -4% -2% -1% 0% 1%

45 -6% -4% -2% -1% 0% 1% 2%

50 -3% -2% 0% 1% 2% 3% 3%

55 1% 3% 3% 4% 5% 6%

60 6% 7% 8% 8% 9% 9%

°C -25 -20 -15 -10 -5 0 5 10 15

30 -13% -11% -10% -9% -9% -9% -9% -9% -10%

35 -14% -12% -11% -10% -9% -9% -9% -10% -10%

40 -12% -11% -10% -9% -9% -9% -10% -10%

45 -11% -10% -9% -9% -9% -9% -10%

50 -11% -9% -9% -8% -8% -8% -9%

55 -9% -8% -7% -7% -7% -8%

60 -9% -8% -7% -6% -6% -7%

°C -25 -20 -15 -10 -5 0 5 10 15

30 0% 1% 2% 4% 5% 6% 8% 9% 11%

35 1% 2% 3% 4% 6% 7% 8% 10% 12%

40 3% 4% 5% 6% 8% 9% 11% 12%

45 6% 6% 7% 8% 10% 11% 13%

50 8% 8% 9% 10% 11% 12% 14%

55 12% 11% 12% 13% 14% 15%

60 17% 16% 15% 15% 16% 17%

COP

To

Tc

COOLING CAPACITY

To

Tc

POWER INPUT

To

Tc

45

Figures 4.2.1, DR7/R404A-1, FH4540Z, 10K Superheat

-20%

-15%

-10%

-5%

0%

5%

10%

-30 -20 -10 0 10 20

DR

7 /

R4

04

A (

%)


Cooling Capacity

TC 30°C

TC 40°C

TC 50°C

TC 55°C

-5%

0%

5%

10%

15%

20%

-30 -20 -10 0 10 20

DR

7 /

R4

04

A (

%)


COP

TC 30°C

TC 40°C

TC 50°C

TC 55°C

46

4.2.2. Operating map with 20°C Return Gas Temperature (68°F)





Tables 4.2.2, DR7/R404A-1, FH4540Z, 20°C RGT

°C -25 -20 -15 -10 -5 0 5 10 15

30 -16% -8% -4% -1% 0% 1% 2% 2% 3%

35 -22% -12% -6% -3% -1% 0% 1% 2% 2%

40 -16% -8% -4% -2% 0% 1% 2% 3%

45 -11% -5% -2% 0% 2% 3% 4%

50 -13% -6% -1% 1% 3% 4% 5%

55 -6% 0% 3% 5% 7% 8%

60 -5% 2% 7% 9% 11% 12%

°C -25 -20 -15 -10 -5 0 5 10 15

30 -12% -7% -5% -5% -5% -6% -7% -8% -8%

35 -16% -10% -7% -6% -6% -7% -7% -8% -9%

40 -13% -8% -6% -6% -6% -7% -8% -9%

45 -10% -7% -6% -6% -7% -8% -8%

50 -13% -8% -6% -6% -6% -7% -8%

55 -10% -6% -5% -5% -6% -7%

60 -11% -7% -5% -4% -4% -5%

°C -25 -20 -15 -10 -5 0 5 10 15

30 -5% -1% 1% 4% 6% 8% 10% 11% 12%

35 -7% -2% 1% 3% 5% 7% 9% 11% 12%

40 -3% 0% 2% 5% 7% 9% 11% 12%

45 0% 2% 5% 7% 9% 11% 13%

50 0% 3% 5% 7% 10% 12% 14%

55 4% 7% 9% 11% 13% 15%

60 7% 10% 12% 14% 16% 18%

COOLING CAPACITY

To

COP

To

To

POWER INPUT

47

Figures 4.2.2, DR7/R404A-1, FH4540Z, 20°C RGT

-20%

-15%

-10%

-5%

0%

5%

10%

-30 -20 -10 0 10 20

DR

7 /

R4

04

A (

%)


Cooling Capacity

TC 30°C

TC 40°C

TC 50°C

TC 55°C

-10%

-5%

0%

5%

10%

15%

20%

-30 -25 -20 -15 -10 -5 0 5 10 15 20

COP

TC 30°C

TC 40°C

TC 50°C

TC 55°C

48

4.2.3. Discharge temperature with 20°C return gas temperature

R404A – Discharge temperature (°C)

DR7 – Discharge temperature (°C)

°C -25 -20 -15 -10 -5 0 5 10 15

30 100 98 94 89 82 75 67 60 54

35 100 98 94 89 83 77 70 64 59

40 101 97 92 86 80 74 69 65

45 102 97 91 85 79 74 71

50 109 103 96 90 84 79 76

55 109 101 94 88 83 80

60 114 106 98 91 86 83

To

Tc

°C -25 -20 -15 -10 -5 0 5 10 15

30 119 111 103 95 87 80 74 68 63

35 124 116 108 100 93 85 79 73 68

40 122 114 106 98 90 84 77 72

45 119 111 103 96 89 82 77

50 126 117 109 102 94 88 82

55 124 116 108 100 93 87

60 132 123 115 107 100 93

To

Tc

49

5. Summary

The compressor calorimeter testing of Chemours DR-7 was carried out at dew point conditions versus R-

404A.

Overall the compressor capacity is within 85% to +115% of R-404A rated performance across the

operating map, with extremes at high pressure ratio that should be double checked on smaller calorimeter

capacity range to eliminate potential testing uncertainty.

The compressor COP of DR-7 is between about 95% to +115% of R-404A across the compressor

operating envelope.

The discharge temperature of DR-7 is consistently higher than R-404A, up to 20K (36°F) with 10K

superheat (18°F), therefore additional compressor cooling will be required at low evaporating/high

condensing temperature and/or with high superheating.

Documents

TEST REPORT #64 - Air Conditioning, Heating and ...ahrinet.org/App_Content/ahri/files/RESEARCH/AREP_Final_Reports/AHRI... · subject to periodical calibration in accordance with EN