上海交通大学学报

上海交通大学学报 >

2023 , Vol. 57 >Issue 10: 1367 - 1377

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2022.155

机械与动力工程

绿色工质HP-1高温热泵系统中膨胀阀开度与流量匹配特性

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  • 1.西安建筑科技大学 建筑设备科学与工程学院, 西安 710055
    2.浙江省化工研究院有限公司含氟温室气体替代及控制处理国家重点实验室, 杭州 310023
    3.上海交通大学 制冷与低温工程研究所, 上海 200240
王约翰(1998-),硕士生,从事绿色环保高温热泵技术和新型制冷剂膨胀节流特性研究.

收稿日期: 2022-05-10

  修回日期: 2022-06-06

  录用日期: 2022-06-17

  网络出版日期: 2022-11-11

基金资助

国家自然科学基金(52036004)

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Matching Characteristics of Expansion Valve Opening and Flow Rate of High Temperature Heat Pump with Green Refrigerant HP-1

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  • 1. School of Building Services Sciences and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
    2. State Key Laboratory of the Fluorinated Greenhouse Gases Replacement and Control Treatment, Zhejiang Research Institute of Chemical Industry Co., Ltd., Hangzhou 310023, China
    3. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China

Received date: 2022-05-10

  Revised date: 2022-06-06

  Accepted date: 2022-06-17

  Online published: 2022-11-11

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摘要

节流过程作为热泵系统中的重要环节,对系统运行有着重要影响.以新型环保工质HP-1准二级压缩高温热泵为对象,考虑电子膨胀阀的阀体开度和制冷剂性质等参数影响,利用MATLAB建立系统循环和电子膨胀阀的数学模型,对系统在变工况下的电子膨胀阀开度与流量匹配特性进行模拟,并利用实验数据通过幂律拟合的方法得到了HP-1的流量系数关联式.研究结果表明:椭圆锥形阀体结构的电子膨胀阀可用于HP-1高温热泵系统,能够适应系统在变工况下的节流特性,蒸发温度在50~90 ℃、冷凝温度在60~120 ℃范围变化时,该种类型阀体用于主节流阀的开度调节范围为49.8%~69.8%,用于补气路节流阀的开度调节范围为41.5%~56.0%,且经过实验验证具有良好适用性;获得的拟合关联式与实际数据的相对偏差在 -7.8%~+7.5%之间,能够准确地预测电子膨胀阀的流量特性.根据制冷剂性质选择与之匹配的电子膨胀阀, 并对其控制系统进行优化改进,这对于实际机组的运行性能至关重要.本研究为高温热泵用电子膨胀阀的选型与控制系统的优化提供了良好的研究基础.

关键词： HP-1高温热泵; 电子膨胀阀; 流量特性; 实验研究; 经验关联式

本文引用格式

王约翰, 南晓红, 欧阳洪生, 郭智恺, 胡斌, 王如竹 . 绿色工质HP-1高温热泵系统中膨胀阀开度与流量匹配特性[J]. 上海交通大学学报, 2023 , 57(10) : 1367 -1377 . DOI: 10.16183/j.cnki.jsjtu.2022.155

Abstract

The throttling process, as an important part of the heat pump system, plays a crucial role in the efficient and reliable operation of the whole system. This paper, taking the quasi two-stage compression high-temperature heat pump with green refrigerant HP-1 as the research subject, established the mathematical models of the circulatory system and electronic expansion valve by using MATLAB and considering the influence of the opening of electronic expansion valve and thermodynamic properties of the new green refrigerant. It simulated the matching characteristics of electronic expansion valve opening and flow rate under variable operating conditions, and fitted the HP-1 dimensionless flow coefficient correlation by power-law distribution using experimental data. The research results show that the electronic expansion valve with an elliptical conical body structure adapts to the throttling characteristics of the HP-1 high-temperature heat pump system under variable operating conditions. When the evaporating temperature varies from 50 ℃ to 90 ℃ and the condensing temperature varies from 60 ℃ to 120 ℃, the opening adjustment range of this type of valve body is from 49.8% to 69.8% for the main throttle valve, and from 41.5% to 56.0% for the injection throttle valve. The relative deviation of the fitted correlation results and the actual test data is between -7.8% and +7.5%, and the flow coefficient correlation can accurately predict the flow characteristics of the electronic expansion valve with a similar body structure. The selection of favorable electronic expansion valve matching refrigerant properties and the optimization of the electronic expansion valve control system are essential for the actual operating performance. This study provides a good research foundation for the selection of electronic expansion valves and the optimization of the control system for the HP-1 high temperature heat pump.

Key words： HP-1 high temperature heat pump; electronic expansion valves; flow characteristics; experimental research; experimental correlation

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