Energy and Thermal Conductivity Assessment of Dimethyl-Ether and its Azeotropic Mixtures as Alternative Low Global Warming Potential Refrigerants in a Refrigeration System

Substituting Hydrofluorocarbons with natural refrigerants in domestic refrigerators will significantly reduce the direct contributions of fluorinated gases to global warming which will be of great environmental benefit. In this study, the performances of dimethyl-ether (RE170) and its azeotropic mix...

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Autores principales:	Bolaji Bukola Olalekan, Oyelaran Olatunde Ajani, Abiala Israel Olutunji, Ogundana Tunde Oluwatoyin, Amosun Semiu Taiwo
Formato:	article
Lenguaje:	EN
Publicado:	Sciendo 2021
Materias:	azeotropic mixtures alternative refrigerants dimethyl-ether domestic refrigerator low global warming r510a and r511a thermal conductivity Renewable energy sources TJ807-830
Acceso en línea:	https://doaj.org/article/2b761c3e06ff4501b6e3da53671ab3d1
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spelling	oai:doaj.org-article:2b761c3e06ff4501b6e3da53671ab3d12021-12-05T14:11:10ZEnergy and Thermal Conductivity Assessment of Dimethyl-Ether and its Azeotropic Mixtures as Alternative Low Global Warming Potential Refrigerants in a Refrigeration System2255-883710.2478/rtuect-2021-0002https://doaj.org/article/2b761c3e06ff4501b6e3da53671ab3d12021-01-01T00:00:00Zhttps://doi.org/10.2478/rtuect-2021-0002https://doaj.org/toc/2255-8837Substituting Hydrofluorocarbons with natural refrigerants in domestic refrigerators will significantly reduce the direct contributions of fluorinated gases to global warming which will be of great environmental benefit. In this study, the performances of dimethyl-ether (RE170) and its azeotropic mixtures (R510A and R511A) in a refrigeration system were assessed theoretically and compare with that of conventional refrigerant. The study revealed that the three investigated alternative refrigerants exhibited significantly good heat transfer characteristics, low pressure ratio, high latent heat in the liquid phase which resulted in their high thermal conductivity and Volumetric Cooling Capacity (VCC). The thermal conductivity of the refrigerants reduces while the evaporating temperature rises and the value obtained for RE170 was the highest among the four refrigerants studied. The Coefficient of Performance (COP) for RE170, R510A and R511A were higher than that of R134a by 6.20, 10.06 and 3.02 % respectively while their power consumptions per ton of refrigeration were lower than that of R134a by 6.99, 11.04 and 1.47 % respectively. In conclusion, dimethyl-ether and its azeotropic mixtures performed better than R134a in that they have higher thermal conductivity, refrigerating effect, VCC, COP, lower power consumption per ton of refrigeration and hence, they can be considered as suitable replacements for R134a in domestic refrigerator.Bolaji Bukola OlalekanOyelaran Olatunde AjaniAbiala Israel OlutunjiOgundana Tunde OluwatoyinAmosun Semiu TaiwoSciendoarticleazeotropic mixturesalternative refrigerantsdimethyl-etherdomestic refrigeratorlow global warmingr510a and r511athermal conductivityRenewable energy sourcesTJ807-830ENEnvironmental and Climate Technologies, Vol 25, Iss 1, Pp 12-28 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	azeotropic mixtures alternative refrigerants dimethyl-ether domestic refrigerator low global warming r510a and r511a thermal conductivity Renewable energy sources TJ807-830
spellingShingle	azeotropic mixtures alternative refrigerants dimethyl-ether domestic refrigerator low global warming r510a and r511a thermal conductivity Renewable energy sources TJ807-830 Bolaji Bukola Olalekan Oyelaran Olatunde Ajani Abiala Israel Olutunji Ogundana Tunde Oluwatoyin Amosun Semiu Taiwo Energy and Thermal Conductivity Assessment of Dimethyl-Ether and its Azeotropic Mixtures as Alternative Low Global Warming Potential Refrigerants in a Refrigeration System
description	Substituting Hydrofluorocarbons with natural refrigerants in domestic refrigerators will significantly reduce the direct contributions of fluorinated gases to global warming which will be of great environmental benefit. In this study, the performances of dimethyl-ether (RE170) and its azeotropic mixtures (R510A and R511A) in a refrigeration system were assessed theoretically and compare with that of conventional refrigerant. The study revealed that the three investigated alternative refrigerants exhibited significantly good heat transfer characteristics, low pressure ratio, high latent heat in the liquid phase which resulted in their high thermal conductivity and Volumetric Cooling Capacity (VCC). The thermal conductivity of the refrigerants reduces while the evaporating temperature rises and the value obtained for RE170 was the highest among the four refrigerants studied. The Coefficient of Performance (COP) for RE170, R510A and R511A were higher than that of R134a by 6.20, 10.06 and 3.02 % respectively while their power consumptions per ton of refrigeration were lower than that of R134a by 6.99, 11.04 and 1.47 % respectively. In conclusion, dimethyl-ether and its azeotropic mixtures performed better than R134a in that they have higher thermal conductivity, refrigerating effect, VCC, COP, lower power consumption per ton of refrigeration and hence, they can be considered as suitable replacements for R134a in domestic refrigerator.
format	article
author	Bolaji Bukola Olalekan Oyelaran Olatunde Ajani Abiala Israel Olutunji Ogundana Tunde Oluwatoyin Amosun Semiu Taiwo
author_facet	Bolaji Bukola Olalekan Oyelaran Olatunde Ajani Abiala Israel Olutunji Ogundana Tunde Oluwatoyin Amosun Semiu Taiwo
author_sort	Bolaji Bukola Olalekan
title	Energy and Thermal Conductivity Assessment of Dimethyl-Ether and its Azeotropic Mixtures as Alternative Low Global Warming Potential Refrigerants in a Refrigeration System
title_short	Energy and Thermal Conductivity Assessment of Dimethyl-Ether and its Azeotropic Mixtures as Alternative Low Global Warming Potential Refrigerants in a Refrigeration System
title_full	Energy and Thermal Conductivity Assessment of Dimethyl-Ether and its Azeotropic Mixtures as Alternative Low Global Warming Potential Refrigerants in a Refrigeration System
title_fullStr	Energy and Thermal Conductivity Assessment of Dimethyl-Ether and its Azeotropic Mixtures as Alternative Low Global Warming Potential Refrigerants in a Refrigeration System
title_full_unstemmed	Energy and Thermal Conductivity Assessment of Dimethyl-Ether and its Azeotropic Mixtures as Alternative Low Global Warming Potential Refrigerants in a Refrigeration System
title_sort	energy and thermal conductivity assessment of dimethyl-ether and its azeotropic mixtures as alternative low global warming potential refrigerants in a refrigeration system
publisher	Sciendo
publishDate	2021
url	https://doaj.org/article/2b761c3e06ff4501b6e3da53671ab3d1
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Energy and Thermal Conductivity Assessment of Dimethyl-Ether and its Azeotropic Mixtures as Alternative Low Global Warming Potential Refrigerants in a Refrigeration System

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