Abstract
The energy and exergy of low-global warming potential (GWP) refrigerants were investigated experimentally and theoretically. Refrigerants with a modest GWP100 of ≤ 150 can be sufficient for bringing down emissions which were concerned for the automotive air-conditioning system. Three types of low-GWP refrigerants, R152a, R1234yf, and R1234ze(E), were examined with particular reference to the current high-GWP of R134a. The effect of different evaporating and condensing temperatures in addition to compressor speed was considered. The purpose was to bring a clear view of the performance characteristics of possible environment friendly alternatives of R134a. The analysis was carried out with compressor power, cooling capacity, coefficient of performance, exergy destruction, and exergy efficiency. It was noted that the total exergy destruction of R1234yf was reduced by 15% compared to that of R134a. The refrigerant R1234ze(E) has the highest energetic and exergetic performance compared with the other investigated refrigerants.
Highlights
Academic Editor: H.P.S Abdul Khalil e energy and exergy of low-global warming potential (GWP) refrigerants were investigated experimentally and theoretically
Introduction e greenhouse gases of the refrigerants became the most issue in scientific research due to their impact on the environment. e industrial gases which are released in the environment are comparable with CO2 gas, which is identified by a high global warming potential (GWP100) equal to one. e gas with a higher value of global warming potential warms the earth more than the CO2 gas. e current third generation of hydrofluorocarbon refrigerants in the automotive industry is characterized by a zero ozone depletion potential and a high global warming potential when released to the atmosphere
Results and Discussion e results of the low-GWP refrigerants in the automotive air-conditioning system with R134a as baseline were presented as an energetic performance involving cooling capacity, compressor power, and coefficient of performance for different compressor speeds and evaporating and condensing temperatures. e exergetic performance is presented in the form of exergy destruction of each cycle component, total exergy destruction, and exergy efficiency at different cases of refrigerant flow rate and evaporating and condensing temperatures
Summary
Academic Editor: H.P.S Abdul Khalil e energy and exergy of low-global warming potential (GWP) refrigerants were investigated experimentally and theoretically. Many researchers in the past decade have concerned about the energy and exergy analysis of the refrigerants with a low global warming potential (GWP100 < 150) according to Europe’s recommendation. E experiments were performed with a variable speed compressor, and the refrigeration cycles contained a heat exchanger Both the cooling capacity and the coefficient of performance of R1234yf were reduced by 4–7% and 3.6–4.5%, respectively, compared with the R134a system. Jemaa et al [5] performed a theoretical study using the Engineering Equation Solver (EES) software to analyze the chiller refrigeration cycle using R1234ze(E) as an alternative to R134a. Both the energy and exergy were analyzed at different evaporating and ambient temperatures. It was concluded that there was a similar dynamic behavior between the refrigerants R134a and R1234yf
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
