Performance Investigation on the High Temperature Heat Pump System Using R1336Mzz(Z)and Its Binary Mixture
Heat pump technology is an important way to realize energy conversion and reuse.High-temperature heat pumps with heating temperatures above 100 ℃ boast a clear and significant application background as well as enormous market potential.In this paper,a high-temperature heat pump experimental platform was built and the novel refrigerant R1336mzz(Z)/R152a was designed.The performances of R1336mzz(Z)and R1336mzz(Z)/R152a were compared and evaluated at a heating temperature of 90～110 ℃.The results showed that the suction and discharge pressures of R1336mzz(Z)/R152a were 81.56％and 49.60％higher than those of R1336mzz(Z)in high-temperature operation,but its discharge temperature was lower by about 3.8 ℃.The high suction and discharge pressures resulted in high power consumption of the R1336mzz(Z)/R152a compressor.Compared to R1336mzz(Z),the power consumption of R1336mzz(Z)/R152a was 57.40％higher,but its heating capacity was about 62.55％higher.The COP of R1336mzz(Z)/R152a ranged from 5.10 to 4.16,which was about 3.28％more than that of R1336mzz(Z),and its unit volumetric heating capacity was 1639.56～1964.82 kJ/m3.Therefore,R1336mzz(Z)/R152a has great potential for application at a heating temperature of 90～110 ℃,because of its suitable suction and discharge pressures,discharge temperature,high COP,and unit volumetric heating capacity.
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