Cascade air-source heat pump with R410A single fluid

被引：0

作者：

Yang Y.-A. ^{[1
]}

Li R. ^{[1
]}

Li K. ^{[2
]}

Sun T. ^{[2
]}

机构：

[1] College of Mechanical Engineering, Tianjin University of Commerce, Tianjin

[2] Hua Shang International Engineering Co., Ltd., Beijing

来源：

Li, Ruishen (ruishli@yeah.net) | 1812年 / Materials China卷 / 71期

关键词：

Cascade; COP; Heating; Simulation; Variable speed compressor;

D O I：

10.11949/0438-1157.20190911

中图分类号：

学科分类号：

摘要：

In the light of the problems existing in the application of air source heat pump in cold regions, a new single-fluid cascade air-source heat pump (SC-ASHP) has been developed, combining with cascade cycle and compressor DC speed regulation technology. The new-type heat pump can operate not only in a single-stage heating cycle (SHC) mode, but also in a cascade heating cycle (CHC) mode. Under different operating conditions, simulation calculations and experimental studies were performed on the compression ratio, exhaust temperature, heating capacity, and coefficient of performance (COP) of the SC-ASHP system in two different heating modes. The results show that, in low temperature environment, the compressor discharge temperature and the compression ratio of the CHC mode are much lower than the SHC mode; when the condensing temperature of 46℃ and an evaporating temperature of -35℃, COP of the CHC mode is higher than 1.8, the compressor discharge temperature is lower than 120℃, and the compression ratio is not more than 5.0, the system can operate stably and reliably; in addition, the heating capacity is rising steadily by increasing the speed of the low temperature compressor in low temperature environment, meeting the heating supply. New heat pump system expanded the application range of air source heat pump system. © All Right Reserved.

引用

页码：1812 / 1821

页数：9

共 31 条

[1]

Chen Z.D., Luo H.L., Liu J.C., Et al., Analysis of heating performance of CO<sub>2</sub> air-source heat pump in cold region, CIESC Journal, 69, 9, pp. 4030-4036, (2018)

[2]

Shen M., Song Z.P., Applicability of air-source heat pumps in colder climate and relevant measures, Heating Ventilating & Air Conditioning, 6, pp. 37-39, (2002)

[3]

Chai Q.H., Ma G.Y., State of knowledge and current challenges in the ASHP developed for the cold areas, Energy Engineering, 5, pp. 25-31, (2002)

[4]

Chua K.J., Chou S.K., Yang W.M., Advances in heat pump systems: a review, Applied Energy, 87, 12, pp. 3611-3624, (2010)

[5]

Li W.H., Qiu J.J., Zhang X.S., Experimental research on new type of frost-free air source heat pump system in winter, CIESC Journal, 69, 12, pp. 5220-5228, (2018)

[6]

Xu J.F., Zhao Y.H., Quan Z.H., Et al., Defrosting characteristics and energy consumption of new air-water dual source composite heat pump system, CIESC Journal, 69, 6, pp. 2646-2654, (2018)

[7]

Zhang S.L., Researching on the performance of air source heat pump in low temperature, (2014)

[8]

Wu W.B., Wang W., Jin S.M., Et al., Experiment on two-stage compression air-source heat pump water heater, Journal of Refrigeration, 30, 1, pp. 35-38, (2009)

[9]

Shi W.X., Tian C.Q., Wang S., Technical review of air-source heat pump for cold regions, Fluid Machinery, 31, z1, pp. 43-48, (2003)

[10]

Wang W., Ma Z.L., Yao Y., Study on steady state characteristics of air source heat pump (ASHP) under new working conditions in cold environment, Building Science, 23, 10, pp. 28-31, (2007)

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