Experimental investigation on a capillary tube based transcritical CO2 heat pump system

Yulong Song; Jing Wang; Feng Cao; Pengcheng Shu; Xiaolin Wang

doi:10.1016/j.applthermaleng.2016.10.033

Experimental investigation on a capillary tube based transcritical CO₂ heat pump system

Yulong Song
, Jing Wang
, Feng Cao
, Pengcheng Shu
, Xiaolin Wang

Xi'an Jiaotong University
University of Tasmania

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

In this study, a transcritical CO₂ heat pump system using a capillary tube as an expansion device was experimentally investigated. A prototype was developed for this purpose. Experimental study was conducted under different outdoor and indoor temperatures. The results showed that the system cooling capacity and coefficient of performance (COP) dropped by 22% and 24%, respectively as the outdoor air temperature increased from 30 to 40 °C and increased by 12% and 15%, respectively as the indoor air temperature increased from 22 to 32 °C. The system performance was further compared with the transcritical CO₂ heat pump using an electronic expansion valve (EEV) at different gas-cooler outlet temperatures. The comparison results showed that the transcritical CO₂ heat pump using the capillary tube is promising and could achieve performance close to the heat pump using EEV over a wide range of gas-cooler outlet temperature.

Original language	English
Pages (from-to)	184-189
Number of pages	6
Journal	Applied Thermal Engineering
Volume	112
DOIs	https://doi.org/10.1016/j.applthermaleng.2016.10.033
State	Published - 5 Feb 2017

Keywords

Capillary
Carbon dioxide
Coefficient of performance
Transcritical heat pump

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10.1016/j.applthermaleng.2016.10.033

Cite this

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title = "Experimental investigation on a capillary tube based transcritical CO2 heat pump system",

abstract = "In this study, a transcritical CO2 heat pump system using a capillary tube as an expansion device was experimentally investigated. A prototype was developed for this purpose. Experimental study was conducted under different outdoor and indoor temperatures. The results showed that the system cooling capacity and coefficient of performance (COP) dropped by 22\% and 24\%, respectively as the outdoor air temperature increased from 30 to 40 °C and increased by 12\% and 15\%, respectively as the indoor air temperature increased from 22 to 32 °C. The system performance was further compared with the transcritical CO2 heat pump using an electronic expansion valve (EEV) at different gas-cooler outlet temperatures. The comparison results showed that the transcritical CO2 heat pump using the capillary tube is promising and could achieve performance close to the heat pump using EEV over a wide range of gas-cooler outlet temperature.",

keywords = "Capillary, Carbon dioxide, Coefficient of performance, Transcritical heat pump",

author = "Yulong Song and Jing Wang and Feng Cao and Pengcheng Shu and Xiaolin Wang",

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T1 - Experimental investigation on a capillary tube based transcritical CO2 heat pump system

AU - Song, Yulong

AU - Wang, Jing

AU - Cao, Feng

AU - Shu, Pengcheng

AU - Wang, Xiaolin

PY - 2017/2/5

Y1 - 2017/2/5

N2 - In this study, a transcritical CO2 heat pump system using a capillary tube as an expansion device was experimentally investigated. A prototype was developed for this purpose. Experimental study was conducted under different outdoor and indoor temperatures. The results showed that the system cooling capacity and coefficient of performance (COP) dropped by 22% and 24%, respectively as the outdoor air temperature increased from 30 to 40 °C and increased by 12% and 15%, respectively as the indoor air temperature increased from 22 to 32 °C. The system performance was further compared with the transcritical CO2 heat pump using an electronic expansion valve (EEV) at different gas-cooler outlet temperatures. The comparison results showed that the transcritical CO2 heat pump using the capillary tube is promising and could achieve performance close to the heat pump using EEV over a wide range of gas-cooler outlet temperature.

AB - In this study, a transcritical CO2 heat pump system using a capillary tube as an expansion device was experimentally investigated. A prototype was developed for this purpose. Experimental study was conducted under different outdoor and indoor temperatures. The results showed that the system cooling capacity and coefficient of performance (COP) dropped by 22% and 24%, respectively as the outdoor air temperature increased from 30 to 40 °C and increased by 12% and 15%, respectively as the indoor air temperature increased from 22 to 32 °C. The system performance was further compared with the transcritical CO2 heat pump using an electronic expansion valve (EEV) at different gas-cooler outlet temperatures. The comparison results showed that the transcritical CO2 heat pump using the capillary tube is promising and could achieve performance close to the heat pump using EEV over a wide range of gas-cooler outlet temperature.

KW - Capillary

KW - Carbon dioxide

KW - Coefficient of performance

KW - Transcritical heat pump

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U2 - 10.1016/j.applthermaleng.2016.10.033

DO - 10.1016/j.applthermaleng.2016.10.033

M3 - 文章

AN - SCOPUS:84993985659

SN - 1359-4311

VL - 112

SP - 184

EP - 189

JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

ER -

Experimental investigation on a capillary tube based transcritical CO₂ heat pump system

Abstract

Keywords

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