Research on the characteristics of CO2 heat pump integrated with thermal energy storage for space heating

Zhihua Wang; Yujia Zhang; Fenghao Wang; Guichen Li

doi:10.1007/s12206-021-0442-2

Research on the characteristics of CO₂ heat pump integrated with thermal energy storage for space heating

Zhihua Wang
, Yujia Zhang
, Fenghao Wang
, Guichen Li

School of Human Settlements and Civil Engineering

Xi'an Jiaotong University

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

7 Scopus citations

Abstract

The CO₂ air source heat pump (ASHP) has been widely used for space heating and domestic hot water because of its energy saving, high efficiency and environmental protection. However, when used for space heating, the high return water temperature causes higher throttle loss, which results in the energy efficiency of the system obviously decreasing. To solve this problem, a CO₂ ASHP integrated with thermal energy storage (TES) is proposed in this paper. A simulation model of the system was established by TRNSYS software, and the operating characters of the studied system were investigated under the typical daily operating conditions. Additionally, its performance was compared with the benchmark system. This research shows that the average unit COP of the studied system was increased by 14.1 % compared with the benchmark system. It indicates that TES is beneficial for promoting CO₂ heat pump application in cold areas.

Original language	English
Pages (from-to)	2259-2270
Number of pages	12
Journal	Journal of Mechanical Science and Technology
Volume	35
Issue number	5
DOIs	https://doi.org/10.1007/s12206-021-0442-2
State	Published - May 2021

Keywords

CO heat pump
Radiator
Space heating
TES
TRNSYS

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1007/s12206-021-0442-2

Cite this

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title = "Research on the characteristics of CO2 heat pump integrated with thermal energy storage for space heating",

abstract = "The CO2 air source heat pump (ASHP) has been widely used for space heating and domestic hot water because of its energy saving, high efficiency and environmental protection. However, when used for space heating, the high return water temperature causes higher throttle loss, which results in the energy efficiency of the system obviously decreasing. To solve this problem, a CO2 ASHP integrated with thermal energy storage (TES) is proposed in this paper. A simulation model of the system was established by TRNSYS software, and the operating characters of the studied system were investigated under the typical daily operating conditions. Additionally, its performance was compared with the benchmark system. This research shows that the average unit COP of the studied system was increased by 14.1 \% compared with the benchmark system. It indicates that TES is beneficial for promoting CO2 heat pump application in cold areas.",

keywords = "CO heat pump, Radiator, Space heating, TES, TRNSYS",

author = "Zhihua Wang and Yujia Zhang and Fenghao Wang and Guichen Li",

note = "Publisher Copyright: {\textcopyright} 2021, The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature.",

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doi = "10.1007/s12206-021-0442-2",

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TY - JOUR

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AU - Wang, Zhihua

AU - Zhang, Yujia

AU - Wang, Fenghao

AU - Li, Guichen

PY - 2021/5

Y1 - 2021/5

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AB - The CO2 air source heat pump (ASHP) has been widely used for space heating and domestic hot water because of its energy saving, high efficiency and environmental protection. However, when used for space heating, the high return water temperature causes higher throttle loss, which results in the energy efficiency of the system obviously decreasing. To solve this problem, a CO2 ASHP integrated with thermal energy storage (TES) is proposed in this paper. A simulation model of the system was established by TRNSYS software, and the operating characters of the studied system were investigated under the typical daily operating conditions. Additionally, its performance was compared with the benchmark system. This research shows that the average unit COP of the studied system was increased by 14.1 % compared with the benchmark system. It indicates that TES is beneficial for promoting CO2 heat pump application in cold areas.

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KW - Radiator

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KW - TRNSYS

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