Study on the performance of new air-source high-temperature hot water units driven by heat supply network in integrated energy systems

doi:10.3969/j.issn.2097-0706.2022.07.004

Abstract

Abstract:

Conventional electric heat pumps are of low energy efficiency in cold regions.Since the lowest operation temperature of lithium bromide absorption heat pumps is 5 ℃,they cannot work in sub-zero areas of Northeast China.By coupling compression cycle with absorption cycle,a new low-temperature air-source heat pump is proposed.The pump driven by the municipal heat network in an integrated energy system can produce domestic hot water effectively and solve the problems of conventional pumps'poor performance in cold areas and high electricity cost.The operation principle of the coupled heat pump unit is analyzed,and the proposed new heat pump unit is simulated.The effect of the evaporation temperature of a dual-phase heat exchanger,hot water outlet temperature,ambient temperature and steam compressor pressure ratio on the heating performance of the heat pump is obtained through simulation calculations.Through theoretical calculation and comparative analysis on the compression heat pump and the proposed new low-temperature air-source heat pump under four different working conditions,the high performance and industrial value of the latter pump is verified.

Key words: integrated energy systems, absorption heat pump, compression heat pump, dual-phase heat exchanger, coupled cycle, air-source heat pump, driven by heat-supply network

CLC Number:

TK01：TU83

SUN Jian, QIN Yu, WANG Yinwu, WU Kexin, HAO Junhong, YANG Yongping. Study on the performance of new air-source high-temperature hot water units driven by heat supply network in integrated energy systems[J]. Integrated Intelligent Energy, 2022, 44(7): 33-39.

Figures/Tables 12

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Table 1

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项目	耦合循环机组	压缩式热泵
性能系数	3.31	2.24
压缩机耗功功率/kW	215	418
热水流量/（kg·s^-1）	13.0	7.5