Economy of ice source heat pump clean heating system in cold winter zone

doi:10.19799/j.cnki.2095-4239.2021.0206

Abstract

Abstract:

As there is no central heating in most cold winter zones in China, the use of efficient heat pumps is a promising way to achieve clean heating. Based on the principle of phase transformation under supercooling, ice source heat pump uses the latent heat of water near freezing point, which has high energy efficiency and wide applicability. EES (engineering equation solver) software was used to simulate the performance of the ice source heat pump. The influence of parameters such as refrigerant, supercooling degree and condensing temperature on system performance was studied. The results indicated that R22 refrigerant can achieve the highest COP_sys For the system using refrigerant R22, when subcooling degree of subcooled water increased from 1.0 K to 3.5 K, COP_sys decreased from 2.87 to 2.71, which decreased by 5.57%. When the condensing temperature increased from 35 ℃ to 55 ℃, COP_sys decreased significantly from 3.4 to 2.3. What's more, to analyze the operation economy of ice source heat pump, the dynamic change of heating load of 200 m² building in Shanghai and Chongqing was simulated by TRNSYS. The results showed that the operating costs per square meter during heating period were 12.7 yuan/m² and 5.6 yuan/m² respectively. Besides, ice source heat pumps were more economical when operating in Shanghai.

Key words: clean heating, phase transformation under supercooling, ice source heat pump, operation economy analysis

CLC Number:

TU 83

Yingying WANG, Dekun FU, Mingbiao CHEN, Wenji SONG, Ziping FENG. Economy of ice source heat pump clean heating system in cold winter zone[J]. Energy Storage Science and Technology, 2021, 10(4): 1380-1387.

Figures/Tables 9

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地区	电价/元·(kW·h)^-1	水价/元·吨^-1	天然气价格/元·m^-2
上海	0.5	3.45	4.20
重庆	0.5	3.50	2.49

地区	燃气锅炉/元·m^-2	空气源热泵/元·m^-2	冰源热泵/元·m^-2
上海	23.5	13.8	12.7
重庆	6.1	6.1	5.6

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