Performance analysis of a cascade high temperature heat pump using R245fa and BY-3 as working fluid

Xuelian Ma; Yufeng Zhang; Lei Fang; Xiaohui Yu; Xiaoqiong Li; Ying Sheng; Yan Zhang

doi:10.1016/j.applthermaleng.2018.05.052

Performance analysis of a cascade high temperature heat pump using R245fa and BY-3 as working fluid

Xuelian Ma, Yufeng Zhang, Lei Fang, Xiaohui Yu, Xiaoqiong Li, Ying Sheng^*, Yan Zhang

^*Corresponding author for this work

Tianjin University

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Abstract

A high temperature cascade heat pump (HTCHP) using a near-zeotropic mixture named BY-3 as the working fluid in the low-stage refrigerant cycle and R245fa as working fluid in the high-stage refrigerant cycle was proposed in this study. Several experiments were carried out to investigate the performance of the HTCHP at the evaporating temperature from 40 °C to 60 °C and the water outlet temperature on the condensing unit of the high-stage cycle can reach 142 °C with the coefficient of performance (COP) of 1.72. The results showed that BY-3 was feasible to be used in the low-stage cycle. A numerical model of the HTCHP was proposed and validated in this study to evaluate its performance. The comparison between the experimental results and the simulated results showed that the HTCHP system using BY-3 and R245fa can product hot water at 142 °C with good performance and the temperature lift of the HTCHP can reach 100 °C.

Original language	English
Journal	Applied Thermal Engineering
Volume	140
Pages (from-to)	466-475
Number of pages	10
ISSN	1359-4311
DOIs	https://doi.org/10.1016/j.applthermaleng.2018.05.052
Publication status	Published - 2018

Keywords

Experimental verification
High-temperature cascade heat pump
Modeling analysis
Performance evaluation

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10.1016/j.applthermaleng.2018.05.052

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title = "Performance analysis of a cascade high temperature heat pump using R245fa and BY-3 as working fluid",

abstract = "A high temperature cascade heat pump (HTCHP) using a near-zeotropic mixture named BY-3 as the working fluid in the low-stage refrigerant cycle and R245fa as working fluid in the high-stage refrigerant cycle was proposed in this study. Several experiments were carried out to investigate the performance of the HTCHP at the evaporating temperature from 40 °C to 60 °C and the water outlet temperature on the condensing unit of the high-stage cycle can reach 142 °C with the coefficient of performance (COP) of 1.72. The results showed that BY-3 was feasible to be used in the low-stage cycle. A numerical model of the HTCHP was proposed and validated in this study to evaluate its performance. The comparison between the experimental results and the simulated results showed that the HTCHP system using BY-3 and R245fa can product hot water at 142 °C with good performance and the temperature lift of the HTCHP can reach 100 °C.",

keywords = "Experimental verification, High-temperature cascade heat pump, Modeling analysis, Performance evaluation",

author = "Xuelian Ma and Yufeng Zhang and Lei Fang and Xiaohui Yu and Xiaoqiong Li and Ying Sheng and Yan Zhang",

year = "2018",

doi = "10.1016/j.applthermaleng.2018.05.052",

language = "English",

volume = "140",

pages = "466--475",

journal = "Applied Thermal Engineering",

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T1 - Performance analysis of a cascade high temperature heat pump using R245fa and BY-3 as working fluid

AU - Ma, Xuelian

AU - Zhang, Yufeng

AU - Fang, Lei

AU - Yu, Xiaohui

AU - Li, Xiaoqiong

AU - Sheng, Ying

AU - Zhang, Yan

PY - 2018

Y1 - 2018

N2 - A high temperature cascade heat pump (HTCHP) using a near-zeotropic mixture named BY-3 as the working fluid in the low-stage refrigerant cycle and R245fa as working fluid in the high-stage refrigerant cycle was proposed in this study. Several experiments were carried out to investigate the performance of the HTCHP at the evaporating temperature from 40 °C to 60 °C and the water outlet temperature on the condensing unit of the high-stage cycle can reach 142 °C with the coefficient of performance (COP) of 1.72. The results showed that BY-3 was feasible to be used in the low-stage cycle. A numerical model of the HTCHP was proposed and validated in this study to evaluate its performance. The comparison between the experimental results and the simulated results showed that the HTCHP system using BY-3 and R245fa can product hot water at 142 °C with good performance and the temperature lift of the HTCHP can reach 100 °C.

AB - A high temperature cascade heat pump (HTCHP) using a near-zeotropic mixture named BY-3 as the working fluid in the low-stage refrigerant cycle and R245fa as working fluid in the high-stage refrigerant cycle was proposed in this study. Several experiments were carried out to investigate the performance of the HTCHP at the evaporating temperature from 40 °C to 60 °C and the water outlet temperature on the condensing unit of the high-stage cycle can reach 142 °C with the coefficient of performance (COP) of 1.72. The results showed that BY-3 was feasible to be used in the low-stage cycle. A numerical model of the HTCHP was proposed and validated in this study to evaluate its performance. The comparison between the experimental results and the simulated results showed that the HTCHP system using BY-3 and R245fa can product hot water at 142 °C with good performance and the temperature lift of the HTCHP can reach 100 °C.

KW - Experimental verification

KW - High-temperature cascade heat pump

KW - Modeling analysis

KW - Performance evaluation

U2 - 10.1016/j.applthermaleng.2018.05.052

DO - 10.1016/j.applthermaleng.2018.05.052

M3 - Journal article

SN - 1359-4311

VL - 140

SP - 466

EP - 475

JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

ER -

Performance analysis of a cascade high temperature heat pump using R245fa and BY-3 as working fluid

Abstract

Keywords

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