A Double-Heat Source High-Temperature Heat Pump System with an Intermediate Heat Exchanger

doi:10.7652/xjtuxb201411012

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A Double-Heat Source High-Temperature Heat Pump System with an Intermediate Heat Exchanger

更新时间：2025-07-09

- A Double-Heat Source High-Temperature Heat Pump System with an Intermediate Heat Exchanger
- Vol. 48, Issue 11, Pages: 70-74+80(2014)
- 作者机构：
  
  西安交通大学热流科学与工程教育部重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201411012
  CLC： TU833.1
- Online First：10 November 2014，
  
  Published：2014
- 稿件说明：
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A Double-Heat Source High-Temperature Heat Pump System with an Intermediate Heat Exchanger[J]. 2014, 48(11): 70-74+80.
DOI：

A Double-Heat Source High-Temperature Heat Pump System with an Intermediate Heat Exchanger[J]. 2014, 48(11): 70-74+80. DOI： 10.7652/xjtuxb201411012.

摘要

为了提高工业高温热泵系统的热力性能

实现对工业低温余热的高效综合回收

提出了一种带中间换热器的双热源高温热泵系统。第一级热泵以CO

为工质、以空气为热源

在超临界状态下将冷水加热到中间温度。第二级热泵以R152a(二氟乙烷)作为工质

从工业余热源吸收热量

将用水加热到所需的高温

并且在中间换热器中将CO

加热到过热状态。对该双热源热泵系统进行热力学分析

发现给定R152a在中间换热器温降的情况下

存在最大的过热度

使得整个系统达到最佳运行工况。以回收50 ℃废水余热为例与单热源热泵进行比较

平均供水量是后者的两倍多

单位质量热水的耗功量减少43.2%

性能系数和火用效率分别平均提高41.9%和23.96%。

Abstract

To improve the thermal performance of industrial heat pumps and realize the high-efficiency recovery of industrial low-temperature residual heat

a double-heat source high-temperature heat pump system with an intermediate heat exchanger is proposed in this paper and the cold water is heated to high temperatures by two stages for industrial application. First

it is heated to the intermediate temperature by CO

which absorbs heat from the air

and then

the water is further heated to a high temperature by R152a

taking waste water as the heat source. In the intermediate heat exchanger

the heat of R152a after condensation is recovered by heating CO

to the superheated state after evaporation. Thermodynamic analysis was conducted and it was i

ndicated that there exists a highest superheated temperature for CO

when the temperature drop of R152a is given in the intermediate heat exchanger

which shows the best performance of this heat pump system. Compared with the single-heat source heat pump by recovering the residual heat of waste water of 50 ℃

the hot water supply is more than double of it; the average power consumption per kg of hot water decreases about 43.2%; and the COP and energy efficiency increase about 41.9% and 23.9% respectively.

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Keywords

references

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