A Constrained High-pressure Control Equation for CO2 Heat Pump Water Heating System

Wang Lei; Liang Xingyu; Shao Liangliang; Zhang Chunlu

doi:10.3969/j.issn.0253-4339.2018.01.020

您当前的位置：

首页 >

文章列表页 >

A Constrained High-pressure Control Equation for CO2 Heat Pump Water Heating System

更新时间：2024-07-18

- A Constrained High-pressure Control Equation for CO2 Heat Pump Water Heating System
- Journal of Refrigeration Vol. 39, Issue 1, Pages: 20-27(2018)
- 作者机构：
  
  同济大学机械与能源工程学院制冷与低温工程研究所
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2018.01.020
  CLC：
- Published：2018
- 稿件说明：
移动端阅览
Wang Lei, Liang Xingyu, Shao Liangliang, et al. A Constrained High-pressure Control Equation for CO2 Heat Pump Water Heating System[J]. Journal of Refrigeration, 2018, 39(1): 20-27.
DOI：

Wang Lei, Liang Xingyu, Shao Liangliang, et al. A Constrained High-pressure Control Equation for CO2 Heat Pump Water Heating System[J]. Journal of Refrigeration, 2018, 39(1): 20-27. DOI： 10.3969/j.issn.0253-4339.2018.01.020.

摘要

系统高压的优化与控制在提升跨临界CO2系统效率方面至关重要。在CO2热泵热水系统中，传统的高压控制方程中仅考虑了气体冷却器侧的出口温度而忽略实际应用中对出水温度的要求和温度夹点，导致系统性能大大降低。本文针对温度夹点和进出水温等约束的影响，建立了有约束的气冷器模型，并对系统高压进行了优化。采用实验设计以及统计学方法确定影响最优高压的主要因素，通过最小二乘法回归出最优高压控制方程。使用该高压控制方程的系统平均COP损失1.8%，最大COP损失8.7%，可以更好地满足实际应用。

Abstract

The optimization and control of discharge pressure is important in transcritical CO2 heat pump water heating systems. The traditional high-pressure control equation simply takes the exit temperature of the gas cooler into account

neglecting the impacts of the pinch point and the outlet temperature of water

which might lead to a huge coefficient of performance (COP) loss in applications. In this paper

we report the development of a constrained gas cooler model by considering the influence of the pinch point and water inlet and outlet temperatures. The main impact factors of the optimum high pressure are determined through the design of experiments and statistical methods. Consequently

a new constrained optimal high-pressure control equation using least-squares regression is proposed. Based on the new control equation

the system COP loss is 1.8% in average (maximum 8.7%)

providing better reliability for engineering practices.

关键词

Keywords

references

Views

2648

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Advancements in Low-GWP Refrigerant Substitution and Lubricant Technologies for Variable Refrigerant Flow Systems

Research on Leakage Safety of Split-Type Air Conditioners Using R290 Based on Product Development

Heat-Transfer Performance of Gas-Gap Heat Switch for mK Sorption Cooler

Key Points and Feasible Paths for Carbon-Emission Reduction of Cold Processing in Vegetable-Producing Areas

Performance Comparison of Three Booster-Assisted Ejector Refrigeration Cycles with Environmentally Friendly Refrigerants

Related Author

No data

Related Institution

No data

Address：10/F, Yindu Mansion, 67 Fucheng Road, Haidian Dist, Beijing, China Postal code：100142
Tel：010-68711412 Email：editor@car.org.cn
Technical support is provided by Beijing Founder electronics co., LTD 京ICP备09064830号-19 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰

AI伴读