Performance analysis of low GWP refrigerants mixture as a substitute for R410A in residential air conditioner in tropical region

International Conference on Sustainable Energy and Green Technology 2018

能源学;生态环境科学

Ng, Wenbin^1^2 ; Mohamed Kamar, Haslinda^1 ; Kamsah, Nazri^1 ; Wang, Fu-Jen^3

School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, UTM, Johor Bahru, Johor

81310, Malaysia^1

Heating, Ventilating, Air Conditioning and Refrigerating Section, Universiti Kuala Lumpur Malaysia, France Institute, Bandar Baru Bangi, Selangor, Malaysia^2

Department Refrigeration, Air Conditioning and Energy Engineering, National Chin-Yi University of Technology, Taiping, Taichung

41170, Taiwan^3

关键词: Condensing temperature;    Conditioning systems;    Global warming potential;    Refrigerants mixtures;    Residential air conditioning;    Split air conditioners;    Total equivalent warming impacts;    Vapour compression cycles;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/268/1/012104/pdf
DOI  :  10.1088/1755-1315/268/1/012104

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The issue of global warming has triggered more critical issues, and today's refrigerants with high global warming potential (GWP) are facing the challenges of being phased out. According to 2014 Assessment Report of the Refrigeration, Air-Conditioning and Heat Pumps Technical Options Committee (RTOC Assessment Report 2014), the R410A has GWP of 2100 and is widely used in residential air-conditioning and heat pump systems. Currently, in the market, the potential refrigerant that can be used to replace R410A in the air-conditioning system is R32. The purpose of this project is to create a new refrigerant mixture using low GWP refrigerant as a base that can replace for R410A in an air-cooled split air conditioner. Simulation works have been developed using Refprop software to simulate the refrigeration cycle with the operating conditions of the air-cooled split air conditioner, in the tropical region. The chosen cycle was an ideal vapour compression cycle with the evaporating and condensing temperatures of 5 °C and 47 °C, respectively. Through this study, two potential refrigerants mixture was found to be suitable to replace the R410A. The two refrigerant mixtures, R32/R1234ze and R32/R600a, both based on R32, were found to have similar thermodynamic properties as the R410A. They were found to be able to produce the coefficient of performance (COP) very close to the R410A when used in an air-cooled split air-conditioning system. Hence, the use of this refrigerants will avoid significant modifications on the present air-conditioning system configurations. Refrigerant R32/R1234ze has the potential to reduce the GWP of R410A by 70 % while refrigerant R32/R600a by 73 %. At the end of the equipment lifespan, refrigerant R32/R1234ze would reduce the direct of Total Equivalent Warming Impact (TEWI) by 23 % while refrigerant R32/R600a by 20 %.in constructing both.