TEST REPORT #49. Compressor Calorimeter Test of Refrigerant Blend HDR110 in a R-404A Reciprocating Compressor
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1 Air-Conditioning, Heating, and Refrigeration Institute (AHRI) Low-GWP Alternative Refrigerants Evaluation Program (Low-GWP AREP) TEST REPORT #49 Compressor Calorimeter Test of Refrigerant Blend HDR110 in a R-4A Reciprocating Compressor Jozef Sedliak Embraco Slovakia Odorinska cesta 2, Spisska Nova Ves, Slovakia September 23, 2015 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: Scope of the work is evaluation of the compressor performance with new low GWP refrigerant HDR110 in compressor NEK2134GK primarily used for R4A refrigerant. 2. Details of Test Setup: a. Description of Test Refrigerant-Lubricant and Charge Refrigerant or refrigerant blend tested o R4A by supplier LINDE o New mixture refrigerant named HDR110 delivered by Honeywell Lubricant o Compressor lubricant is POE oil Emkarate RL 22HB by Lubrizol. b. Description of Compressors and test conditions/methodology The evaluation was done by testing of 2 compressors model NEK2134GK, 958AG71 made by Embraco, type hermetic reciprocating one piston compressor. Compressors are primarily used for R4A refrigerant. First test was done with R4A for purpose of reference values and then they were tested with new refrigerant HDR110. Average from 2 compressors was considered in the final results. Model NEK2134GK NEK2134GK BOM 958AG71 958AG71 Application LBP-HST LBP-HST S/N P12RLC52 P12RPA8D Oil POE 22 POE 22 Motor CSIR, monophase CSIR, monophase Power supply 115V/Hz 115V/Hz Ambient temperature C C Subcooling 0 C 0 C Fan cooling 270 m 3 /h 270 m 3 /h Temperature determination Dewpoint Dewpoint Table 2-1, Compressor configuration and test description Thermodynamic properties of R4A determined from Refprop 6.0 (by NIST USA), thermodynamic properties of HDR110 determined from files received from Honeywell. 2
3 c. Test facilities The performance tests were performed on a calorimeter using Calorimetric method A Secondary fluid calorimeter on the suction side, see EN Before the measurements were done, the calorimeter was cleaned from potential residues of previous tests, evacuated and subsequently charged with the correct refrigerant R4A and HDR110. Calorimeter charge with R4A: 0.7 kg Calorimeter charge with HDR110: 1.2 kg Figure 2-1, Schematic diagram of the calorimeter 3
4 Parameter Instrument Accuracy Compressor power input Yokogawa WT2 ± (0.1% of reading + 0.1% of range), Compressor voltage Yokogawa WT2 ± (0.1% of reading + 0.1% of range), 0 V Compressor current Yokogawa WT2 ± (0.1% of reading + 0.1% of range), 10 A Heat exchanger DC power input Yokogawa WT2 ± (0.3% of reading + 0.2% of range) Heat exchanger DC voltage Yokogawa WT2 ± (0.2% of reading + 0.2% of range), 0 V Heat exchanger DC current Yokogawa WT2 ± (0.2% of reading + 0.2% of range), 20 A Suction pressure transducer BD sensor 10 bar ± 0.1% of range Discharge pressure transducer BD sensor bar ± 1% of range Temperature - Heat exchanger input TC "T", Agilent 34970A ± 0.5 C Temperature - Heat exchanger output TC "T", Agilent 34970A ± 0.5 C Temperature - Heat exchanger internal TC "T", Agilent 34970A ± 0.3 C Temperature - Calorimeter ambient TC "T", Agilent 34970A ± 0.5 C Temperature - Compressor shell TC "T", Agilent 34970A ± 0.5 C Temperature - Return gas TC "T", Agilent 34970A ± 0.5 C Table 2-2, List of instruments with their accuracy d. Coefficients equation format Coefficients equation format: X = C1 +C2 (S) + C3 D +C4 (S 2 ) + C5 (S D) + C6 (D 2 ) + C7 (S 3 ) + C8 (D S 2 ) +C9 (S D 2 ) + C10 (D 3 ) where: C = Equation coefficient, represents compressor performance S = Suction dew point temperature, F [ C] D = Discharge dew point temperature, F [ C] X = compressor performance (mass flow rate, capacity, power and COP) e. Uncertainties Uncertainty for cooling capacity: ± BTU/h (valid for all points) Power input uncertainty: ± 3.46 W (valid for all points) 4
5 3. Results All compressor tests are performed at a refrigerant s dew point temperature for suction and discharge pressure conditions, per AHRI Standard 5 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 mid-point of the temperature glide rather than the dew point will yield results that are more representative of actual operation in a system. R4A is near azeotropic blend with small temperature glide less than 1K and from practical purposes can be neglected. HDR110 is a zeotropic blend with temperature glides between 12.4K (@ 0.01MPa) and 3.8K (@ 4MPa) Return gas temperature 18.3 C Reference measurement with R4A (dew point based) AVERAGE T cond T evap T return gas T Superheat Cool. Capacity Power input Current EER Mass flow REFRIGERANT ( C) ( C) ( C) ( C) BTU/h W A (BTU/Wh) kg/h R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A Table 3-1a., Measured data of NEK2134GK, refrigerant R4A, return gas temperature 18.3 C (dew point based) 5
6 AVERAGE T cond T evap T return gas T Superheat Cool. Capacity Power input Current EER Mass flow REFRIGERANT ( C) ( C) ( C) ( C) % % % % % R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A Table 3-1b., Difference (abs %) between 2 measured pieces of NEK2134GK, refrigerant R4A, return gas temperature 18.3 C (dew point based) Coefficients Capacity (BTU/h, C) Mass flow (kg/h, C) Power input (W, C) C E E E+02 C E E E+00 C3-1.3E E E+00 C E E E-02 C5-3.0E E E-02 C E E E-03 C E E E-03 C8-3.6E E E-04 C E E E-03 C E E E-05 Table 3-2., Coefficients C1 C10 for NEK2134GK, refrigerant R4A, return gas temperature 18.3 C (dew point based) 6
7 Capacity (BTU/h) CURVE-FITTED CHARTS COMPRESSOR CHART - CAPACITY (BTU/h); R4A, return 18.3 C Figure 3-1, Cooling capacity of NEK2134GK, refrigerant R4A, return gas temperature 18.3 C, (dew point based) 7
8 Power input (W) Mass flow (kg/h) COMPRESSOR CHART - MASS FLOW (kg/h); R4A, return 18.3 C Figure 3-2, Mass flow of NEK2134GK, refrigerant R4A, return gas temperature 18.3 C, (dew point based) 6 0 COMPRESSOR CHART - POWER INPUT(W); R4A, return 18.3 C Figure 3-3, Power input of NEK2134GK, refrigerant R4A, return gas temperature 18.3 C, (dew point based) 8
9 EER (BTU/Wh) COMPRESSOR CHART - EER(BTU/Wh); R4A, return 18.3 C Figure 3-4, EER of NEK2134GK, refrigerant R4A, return gas temperature 18.3 C, (dew point based) Measurement with new refrigerant HDR110 AVERAGE T cond T evap T return gas T Superheat Cool. Capacity Power input Current EER Mass flow REFRIGERANT ( C) ( C) ( C) ( C) BTU/h W A (BTU/Wh) kg/h HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR Table 3-3a., Measured data of NEK2134GK, refrigerant HDR110, return gas temperature 18.3 C, (dew point based) 9
10 AVERAGE T cond T evap T return gas T Superheat Cool. Capacity Power input Current EER Mass flow REFRIGERANT ( C) ( C) ( C) ( C) % % % % % HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR Table 3-3b., Difference (abs %) between 2 measured pieces of NEK2134GK, refrigerant HDR110, return gas temperature 18.3 C, (dew point based) Coefficients Capacity (BTU/h) Mass flow (kg) Power input (W) C E E E+02 C E E E+00 C3-7.1E E E-01 C E E E-03 C E E E-02 C E E E-01 C7 1.0E E E-04 C E E E-05 C E E E-03 C E E E-04 Table 3-4, Coefficients C1 C10 for NEK2134GK, refrigerant HDR110, return gas temperature 18.3 C, (dew point based) 10
11 Mass flow (kg/h) Capacity (BTU/h) CURVE-FITTED CHARTS COMPRESSOR CHART - CAPACITY (BTU/h); HDR110, return 18.3 C 00 T cond ( C) Figure 3-5, Cooling capacity of NEK2134GK, refrigerant HDR110, return gas temperature 18.3 C, (dew point based) COMPRESSOR CHART - MASS FLOW (kg/h); HDR110, return 18.3 C T cond ( C) Figure 3-6, Mass flow of NEK2134GK, refrigerant HDR110, return gas temperature 18.3 C, (dew point based) 11
12 EER (BTU/Wh) Power input (W) COMPRESSOR CHART - POWER INPUT(W); HDR110; return 18.3 C T cond ( C) Figure 3-7, Power input of NEK2134GK, refrigerant HDR110, return gas temperature 18.3 C, (dew point based) COMPRESSOR CHART - EER(BTU/Wh); HDR110, return 18.3 C T cond ( C) Figure 3-8, EER of NEK2134GK, refrigerant HDR110, return gas temperature 18.3 C, (dew point based) 12
13 Comparison of the results Capacity (BTU/h) HDR110 Mass Flow (kg/h) HDR110 C C Capacity (BTU/h) R4A Mass Flow (kg/h) R4A C C Capacity: (HDR110 - R4A)/R4A (%) Mass flow: (HDR110 - R4A)/R4A (%) C C
14 Power Input (W) HDR110 EER (BTU/Wh) HDR110 C C Power Input (W) R4A EER (BTU/Wh) R4A C C Power input: (HDR110 - R4A)/R4A (%) EER: (HDR110 - R4A)/R4A (%) C C Table 3-5, Comparison of the results, return gas temperature 18.3 C, (dew point based) 14
15 3.2. Superheating 11.1 C Reference measurement with R4A (dew point based) AVERAGE T cond T evap T return gas T Superheat Cool. Capacity Power input Current EER Mass flow REFRIGERANT ( C) ( C) ( C) ( C) BTU/h W A (BTU/Wh) kg/h R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A Table 3-6a, Measured data of NEK2134GK, refrigerant R4A, superheating 11.1 C, (dew point based) AVERAGE T cond T evap T return gas T Superheat Cool. Capacity Power input Current EER Mass flow REFRIGERANT ( C) ( C) ( C) ( C) % % % % % R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A Table 3-6b, Difference (abs %) between 2 measured pieces of NEK2134GK, refrigerant R4A, superheating 11.1 C, (dew point based) 15
16 Capacity (BTU/h) Coefficients Capacity (BTU/h, C) Mass flow (kg/h, C) Power input (W, C) C E E E+02 C E E E+00 C E E E+00 C E E E-02 C E E E-01 C E E E-02 C E E E-04 C E E E-04 C E E E-04 C E E E-04 Table 3-7, Coefficients C1 C10 for NEK2134GK, refrigerant R4A, superheating 11.1 C, (dew point based) CURVE-FITTED CHARTS COMPRESSOR CHART - CAPACITY (BTU/h); R4A, SH 11.1 C Figure 3-9, Cooling capacity of NEK2134GK, refrigerant R4A, superheating 11.1 C, (dew point based) 16
17 Power input (W) Mass flow (kg/h) COMPRESSOR CHART - MASS FLOW (kg/h); R4A, SH 11.1 C Figure 3-10, Mass flow of NEK2134GK, refrigerant R4A, superheating 11.1 C, (dew point based) COMPRESSOR CHART - POWER INPUT(W); R4A, SH 11.1 C Figure 3-11, Power input of NEK2134GK, refrigerant R4A, superheating 11.1 C, (dew point based) 17
18 EER (BTU/Wh) COMPRESSOR CHART - EER(BTU/Wh); R4A, SH 11.1 C Figure 3-12, EER of NEK2134GK, refrigerant R4A, superheating 11.1 C, (dew point based) Measurement with new refrigerant HDR110 (dew point based) AVERAGE T cond T evap T return gas T Superheat Cool. Capacity Power input Current EER Mass flow REFRIGERANT ( C) ( C) ( C) ( C) BTU/h W A (BTU/Wh) kg/h HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR Table 3-8a, Measured data of NEK2134GK, refrigerant HDR110, superheating 11.1 C, (dew point based) 18
19 AVERAGE T cond T evap T return gas T Superheat Cool. Capacity Power input Current EER Mass flow REFRIGERANT ( C) ( C) ( C) ( C) % % % % % HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR Table 3-8b., Difference (abs %) between 2 measured pieces of NEK2134GK, refrigerant HDR110, superheating 11.1 C, (dew point based) Coefficients Capacity (BTU/h) Mass flow (kg) Power input (W) C1 6.2E E E+02 C E E E+00 C E E E+01 C E E E-02 C E E E-02 C E E E-01 C E E E-04 C E E E-04 C E E E-03 C10-6.3E E E-03 Table 3-9, Coefficients C1 C10 for NEK2134GK, refrigerant HDR110, superheating 11.1 C, (dew point based) 19
20 Mass flow (kg/h) Capacity (BTU/h) CURVE-FITTED CHARTS COMPRESSOR CHART - CAPACITY (BTU/h); HDR110, SH 11.1 C 32 T cond ( C) Figure 3-13, Cooling capacity of NEK2134GK, refrigerant HDR110, superheating 11.1 C, (dew point based) COMPRESSOR CHART - MASS FLOW (kg/h); HDR110, SH 11.1 C T cond ( C) Figure 3-14, Mass flow of NEK2134GK, refrigerant HDR110, superheating 11.1 C, (dew point based) 20
21 EER (BTU/Wh) Power input (W) COMPRESSOR CHART - POWER INPUT(W); HDR110; SH 11.1 C T cond ( C) Figure 3-15, Power input of NEK2134GK, refrigerant HDR110, superheating 11.1 C, (dew point based) COMPRESSOR CHART - EER(BTU/Wh); HDR110, SH 11.1 C T cond ( C) Figure 3-16, EER of NEK2134GK, refrigerant HDR110, superheating 11.1 C, (dew point based) 21
22 Comparison of the results Capacity (BTU/h) HDR110 Mass Flow (kg/h) HDR110 C C Capacity (BTU/h) R4A Mass Flow (kg/h) R4A C C Capacity: (HDR110 - R4A)/R4A (%) Mass flow: (HDR110 - R4A)/R4A (%) C C
23 Power Input (W) HDR110 EER (BTU/Wh) HDR110 C C Power Input (W) R4A EER (BTU/Wh) R4A C C Power input: (HDR110 - R4A)/R4A (%) EER: (HDR110 - R4A)/R4A (%) C C Table 3-10, Comparison of the results, superheating 11.1 C, (dew point based) 23
24 3.3. Superheating 22.2 C Reference measurement with R4A (dew point based) AVERAGE T cond T evap T return gas T Superheat Cool. Capacity Power input Current EER Mass flow REFRIGERANT ( C) ( C) ( C) ( C) BTU/h W A (BTU/Wh) kg/h R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A Table 3-11a, Measured data of NEK2134GK, refrigerant R4A, superheating 22.2 C, (dew point based) AVERAGE T cond T evap T return gas T Superheat Cool. Capacity Power input Current EER Mass flow REFRIGERANT ( C) ( C) ( C) ( C) % % % % % R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A R4A Table 3-11b., Difference (abs %) between 2 measured pieces of NEK2134GK, refrigerant R4A, superheating 22.2 C, (dew point based) 24
25 Capacity (BTU/h) Coefficients Capacity (BTU/h, C) Mass flow (kg, C) Power input (W, C) C E E E+02 C E E E+00 C E E E+00 C E E E-02 C E E E-02 C E E E-02 C E E E-04 C E E E-04 C9 2.9E E E-03 C E E E-05 Table 3-12, Coefficients C1 C10 for NEK2134GK, refrigerant R4A, superheating 22.2 C, (dew point based) CURVE-FITTED CHARTS COMPRESSOR CHART - CAPACITY (BTU/h); R4A, SH 22.2 C Figure 3-17, Cooling capacity of NEK2134GK, refrigerant R4A, superheating 22.2 C, (dew point based) 25
26 Power input (W) Mass flow (kg/h) COMPRESSOR CHART - MASS FLOW (kg/h); R4A, SH 22.2 C Figure 3-18, Mass flow of NEK2134GK, refrigerant R4A, superheating 22.2 C, (dew point based) COMPRESSOR CHART - POWER INPUT(W); R4A, SH 22.2 C Figure 3-19, Power input of NEK2134GK, refrigerant R4A, superheating 22.2 C, (dew point based) 26
27 EER (BTU/Wh) COMPRESSOR CHART - EER(BTU/Wh); R4A, SH 22.2 C Figure 3-20, EER of NEK2134GK, refrigerant R4A, superheating 22.2 C, (dew point based) Measurement with new refrigerant HDR110 (dew point based) AVERAGE T cond T evap T return gas T Superheat Cool. Capacity Power input Current EER Mass flow REFRIGERANT ( C) ( C) ( C) ( C) BTU/h W A (BTU/Wh) kg/h HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR Table 3-13a, Measured data of NEK2134GK, refrigerant HDR110, superheating 22.2 C, (dew point based) 27
28 AVERAGE T cond T evap T return gas T Superheat Cool. Capacity Power input Current EER Mass flow REFRIGERANT ( C) ( C) ( C) ( C) % % % % % HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR HDR Table 3-13b., Difference (abs %) between 2 measured pieces of NEK2134GK, refrigerant HDR110, superheating 22.2 C, (dew point based) Coefficients Capacity (BTU/h) Mass flow (kg) Power input (W) C1 6.6E E E+02 C2 2.4E E E+00 C E E E+00 C4 3.6E E E-01 C E E E-03 C E E E-01 C E E E-04 C E E E-04 C E E E-03 C E E E-04 Table 3-14, Coefficients C1 C10 for NEK2134GK, refrigerant HDR110, superheating 22.2 C, (dew point based) 28
29 Mass flow (kg/h) Capacity (BTU/h) CURVE-FITTED CHARTS COMPRESSOR CHART - CAPACITY (BTU/h); HDR110, SH 22.2 C T cond ( C) Figure 3-21, Cooling capacity of NEK2134GK, refrigerant HDR110, superheating 22.2 C, (dew point based) COMPRESSOR CHART - MASS FLOW (kg/h); HDR110, SH 22.2 C T cond ( C) Figure 3-22, Mass flow of NEK2134GK, refrigerant HDR110, superheating 22.2 C, (dew point based) 29
30 EER (BTU/Wh) Power input (W) COMPRESSOR CHART - POWER INPUT(W); HDR110; SH 22.2 C T cond ( C) Figure 3-23, Power input of NEK2134GK, refrigerant HDR110, superheating 22.2 C, (dew point based) COMPRESSOR CHART - EER(BTU/Wh); HDR110, SH 22.2 C T cond ( C) Figure 3-24, EER of NEK2134GK, refrigerant HDR110, superheating 22.2 C, (dew point based)
31 Comparison of the results Capacity (BTU/h) HDR110 Mass Flow (kg/h) HDR110 C C Capacity (BTU/h) R4A Mass Flow (kg/h) R4A C C Capacity: (HDR110 - R4A)/R4A (%) Mass flow: (HDR110 - R4A)/R4A (%) C C
32 Power Input (W) HDR110 EER (BTU/Wh) HDR110 C C Power Input (W) R4A EER (BTU/Wh) R4A C C Power input: (HDR110 - R4A)/R4A (%) EER: (HDR110 - R4A)/R4A (%) C C Table 3-15, Comparison of the results, superheating 22.2 C, (dew point based) 32
33 C Relative change Relative change 4. Summary 4.1. Return gas temperature 18.3 C (dew point based) 105% 100% CAPACITY EVALUATION (%), return temp C, dew point based 100% 100% 100% R4A HDR110 95% 90% 90% 87% 85% 83% 80% 75% 70% -10/ -20/ -/ Evap/cond ( C) 115% 110% 105% 100% EFFICIENCY EVALUATION (%), return temp C, dew point based 108% 105% 100% 100% 100% 100% R4A HDR110 95% 90% 85% 80% 75% 70% -10/ -20/ -/ Evap/cond ( C) Shell temperature ( C), return temp C, dew point based R4A HDR / -20/ -/ Evap/cond ( C) 33
34 Relative change Relative change C Discharge temperature ( C), return temp C, dew point based R4A HDR / -20/ -/ Evap/cond ( C) 4.2. Superheating 11.1 C (dew point based) 105% 100% CAPACITY EVALUATION (%), superheating 11.1 C, dew point based 100% 100% 100% R4A HDR110 95% 90% 94% 92% 90% 85% 80% 75% 70% 115% 110% -10/ -20/ -/ Evap/cond ( C) EFFICIENCY EVALUATION (%), superheating 11.1 C, dew point based 112% 111% 108% R4A HDR % 100% 100% 100% 100% 95% 90% -10/ -20/ -/ Evap/cond ( C) 34
35 Relative change C C Shell temperature ( C), superheating 11.1 C, dew point based 56.9 R4A HDR / -20/ -/ Evap/cond ( C) Discharge temperature ( C), superheating 11.1 C, dew point based R4A HDR / -20/ -/ Evap/cond ( C) 4.3. Superheating 22.2 C (dew point based) 105% 100% CAPACITY EVALUATION (%), superheating 22.2 C, dew point based 100% 100% 100% R4A HDR110 95% 90% 91% 90% 89% 85% 80% 75% 70% -10/ -20/ -/ Evap/cond ( C)
36 C C Relative change 115% EFFICIENCY EVALUATION (%), superheating 22.2 C, dew point based R4A HDR % 105% 109% 108% 106% 100% 100% 100% 100% 95% 90% -10/ -20/ -/ Evap/cond ( C) 65 Shell temperature ( C), superheating 22.2 C, dew point based R4A HDR / -20/ -/ Evap/cond ( C) 110 Discharge temperature ( C), superheating 22.2 C, dew point based R4A HDR / -20/ -/ Evap/cond ( C) End of the report 36
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