[1]王迪,王定标,杨雨燊,等.跨临界CO2热泵系统最优排气压力模拟与实验研究[J].郑州大学学报(工学版),2021,42(04):33-39.[doi:10.13705/j.issn.1671-6833.2021.04.001]
　Wang Di,Wang Dingbiao,Yang Yuxi,et al.Simulation and Experimental Analysis on the Optimal Discharge Pressure of a Transcritical CO 2 Heat Pump System[J].Journal of Zhengzhou University (Engineering Science),2021,42(04):33-39.[doi:10.13705/j.issn.1671-6833.2021.04.001]
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跨临界CO2热泵系统最优排气压力模拟与实验研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
42卷
期数:
2021年04期
页码:
33-39
栏目:
出版日期:
2021-07-30

文章信息/Info

Title:
Simulation and Experimental Analysis on the Optimal Discharge Pressure of a Transcritical CO 2 Heat Pump System
作者:
王迪; 王定标; 杨雨燊; 刘鑫鑫; 向飒
郑州大学机械与动力工程学院;郑州大学热能系统节能技术与装备教育部工程研究中心;
Author(s):
Wang Di; Wang Dingbiao; Yang Yuxi; Liu Xinxin; Xiang Yan;
School of Mechanical and Power Engineering of Zhengzhou University; Energy Sales Technology and Equipment Education Research Center of Zhengzhou University Thermal Energy System;
关键词:
Keywords:
intermediate heat exchanger; across the critical CO2; MATLAB; optimal exhaust pressure; correlations
DOI:
10.13705/j.issn.1671-6833.2021.04.001
文献标志码:
A
摘要:
为探究各变量对带中间换热器的跨临界CO2热泵系统制热性能的影响，建立了系统仿真模型，确定了影响最优排气压力的主要因素，并拟合了相应的关联式，同时进行了实验验证。结果表明：蒸发温度、气冷器出口温度、排气压力对系统制热性能的改变影响较大，干度、过热度对系统性能的影响不大，并以此为基础拟合了最优排气压力的相关关联式。经过与实验数据和前人所得的结论对比发现，拟合值与实验值的偏差小于3%，具有更高的精度。
Abstract:
To explore the impact of operating variables on the system optimal exhaust pressure,the influence of the system simulation model was built based on the MATLAB platform.It analyzed the specific conditions,in the presence of the heat exchanger in the middle of the case,the system would effect COP of the system,the variables to determine the main factors affecting the optimal exhaust pressure system,and fitting the corresponding correlations.At the same time,the influence of exhaust pressure on the system performance was studied under different evaporation temperature and air cooler outlet temperature by using the cross-critical CO2 heat pump system test platform.And the corresponding optimal exhaust pressure value under different working conditions was obtained,which was verified by comparison with the simulation value of optimal exhaust pressure.The results show that there was an optimal exhaust pressure in the system,and COP of the system could reaches the maximum under this pressure.With the addition of intermediate heat exchanger,COP of the system increased somewhat,but the optimal exhaust pressure was almost unchanged.High dryness and superheat had little effect on COP of the system.COP of the system decreased sharply with the increase of the outlet temperature of the air cooler,and increased with the increase of the evaporation temperature.The optimal exhaust pressure was mainly related to the outlet temperature of the air cooler and the evaporation temperature.The maximum error between the optimal exhaust pressure obtained by experiment and that obtained by simulation was 3%,the correlation formula of optimal exhaust pressure fitted by simulation was well matched with the actual operation process.

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更新日期/Last Update: 2021-08-26