Comparative performance of an automobile heat pump system with an internal heat exchanger using R1234yf and R134a

Autor:	Murat Hosoz, Ertan Alptekin, Erkutay Tasdemirci
Rok vydání:	2020
Předmět:	Exergy business.industry Automotive industry law.invention General Energy Air conditioning law Power consumption Automotive air conditioning Waste heat Environmental science business Internal heating Process engineering Heat pump
Zdroj:	International Journal of Exergy. 33:98
ISSN:	1742-8300 1742-8297
Popis:	Automotive heat pump (AHP) systems have been recently employed in electric vehicles where waste heat is limited. Due to its impact on global warming, the use of R134a was restricted, and R1234yf has been regarded as its best alternative for automotive air conditioning systems. The AHP systems using R1234yf perform poorly, and a remedy to this problem may be the use of an internal heat exchanger (IHX). This study aims at evaluating and comparing various performance parameters of an experimental AHP system using R134a and R1234yf with and without an IHX. The findings reveal that the R1234yf system with IHX provided on average 13.9% lower heating capacity but 7.8% higher COP based on total power consumption relative to the R134a system. Moreover, for 5 degrees C air inlet temperature, the R1234yf system with IHX yielded on average 22.3% less exergy destruction rate per unit heating capacity compared to the R134a system.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1745dc98bf1ee0cc559f2b5f24a5e0f1 https://doi.org/10.1504/ijex.2020.109625 Zobrazit plný text záznamu