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2205, Page 8 Figure 13 shows irreversible loss caused by pressure drop for heating mode 1 and 2. On other hand, irreversible loss caused by pressure drop in analysis is not exist because pressure drop is ignored in this analysis. For heating mode 1 and 2, the more the volumetric capacity is small, the more the irreversible loss caused by is large. Therefore, the irreversible loss caused by pressure drop decreases if the diameter of connecting pipe and heat exchanger is increased. 4. CONCLUSIONS The COP of four test refrigerants, R410A, R32, R1234ze(E)/R32(20/80 mass%), and R1234ze(E)/R32 (50/50 mass%) has been experimentally and analytically evaluated with a heat pump cycle. The concluding remarks are as follows: (1) For heating mode 1 and 2, in experiment, COP of Ternary 300 and Binary 300 are comparable to that of R410A. In analysis, COP of Ternary 300, Binary 300 and Binary 200 are higher than that of R410A (2) Even if temperature glide of zeotropic mixture equal to water temperature change in the heat exchanger, irreversible loss in heat exchanger increases because of lower heat transfer performance of heat exchanger. (3) COP of Ternary 300, Binary 300 and Binary 200 are higher than that of R410A in improved and the diameter of connecting pipe and heat exchanger is increased. COP coefficient of performance h enthalpy L irreversible loss m mass flow rate Q heat transfer rate T temperature s entropy W compression work Subscripts experiment if compressor is (-) (kJ・kg-1) COND (kJ・kg-1) COMPR (kg・s-1) EVA (kW) EXP (K) H (kJ・kg-1・K-1) h (kW) in NOMENCLATURE REFERENCES de’Rossi, F., Mastrullo, R., Mazzei, P., (1991). Working fluids thermodynamic behavior for vapor compression cycles. Appl. Energy, 38, 163–180. Jakobs, R., Kruse, H., (1978), The use of non-azeotropic refrigerant mixture in heat pumps for energy saving, Proceeding of IIR Commissions B2, Delft(207-218), Netherlands: IIR Kojima, H., Fukuda, S., Kondou C., Takata, N., Koyama, S., (2015), Comparative assessment of heat pump cycle operated with R32/R1234ze(E) and R32/R1234yf mixtures, Proceeding of The 24th IIR International Congress of Refrigeration, Yokohama (1-8). Kanagawa, Japan: IIR Kruse, H, (1981), The advantages of non-azeotropic refrigerant mixtures for heat pump application, Proceeding of IIR Commissions D1, D2, E1, and E2, (119-125): IIR McLinden, M.O., Radermacher, R., (1987), Methods of comparing the performance of pure and mixed refrigerants in the vapour compression cycle, Int. J. Refrig., 10, 318-325. Swinney, J., Jones, W.E., Wilson, J.A., (1998), The impact of mixed non-azeotropic working fluids on refrigeration system performance, Int. J. Refrig., 21(8), 607-616. International Refrigeration and Air Conditioning Conference at Purdue, July 16-19, 2012 condenser compressor evaporator expansion valve heat loss heating mode inlet R refrigerant out outlet P presser dropPDF Image | Experimental Assessment on Performance of a Heat Pump Cycle
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