Performance computation of window air conditioner with very low GWP near azeotropic refrigerant mixtures as a drop in Substitutes to R22

Shaik Sharmas Vali,Ashok Babu,Talanki Puttaranga Setty

doi:10.1051/matecconf/201814404007

Shaik Sharmas Vali, Ashok Babu + Show 1 more

Open Access

https://doi.org/10.1051/matecconf/201814404007

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Abstract

The principal objective of the present study is to compute the thermodynamic performance of window air conditioner based on standard vapour compression refrigeration cycle using R22, R407C and nineteen refrigerant mixtures. In this work nineteen R290/R1270 blends at different compositions are developed. A MATLAB code is developed to compute the thermodynamic performance parameters of all the studied refrigerants at condensing and evaporating temperatures of 54.4°C and 7.2°C respectively. The performance parameters are cooling effect, compressor work, COP, compressor discharge temperature, power per ton of refrigeration and volumetric cooling capacity respectively. Analytical results revealed that COP of new binary mixture R290/R1270 (90/10 by mass %) is 2.82% higher among R22, R407C and nineteen studied refrigerants. Energy required by the compressor per ton of refrigeration for R290/R1270 (90/10 by mass %) is 2.73% lower among R22, R407C and nineteen studied fluids. The discharge temperature of the compressor for all the nineteen investigated blends are reduced by 6.0-8.9oC compared to R22. Overall thermodynamic performance of window air conditioner with R290/R1270 (90/10 by mass %) is better than R22 with significant savings in energy consumption and hence it is an energy efficient ecofriendly refrigerant mixture as a drop in substitute to R22.

Highlights

Hydrochlorofluorocarbon (HCFC) refrigerant R22 was extensivenly used in air conditioning as well as heat pump industries from past several years
Referring to figure 2 it is noticed that refrigeration effect of nineteen refrigerant blends R290/R1270 (2 to 20) are higher than the R22 and R407C
This is due to high latent heat of vaporization of refrigerants when compared to R22 and R407C

Summary

Introduction

Hydrochlorofluorocarbon (HCFC) refrigerant R22 was extensivenly used in air conditioning as well as heat pump industries from past several years. R22 was eventually phase out in all the developed nations by the year 2030 as per Monetreal protocal [1-3]. Till no pure refrigerant is avialble to replace R22. Earlier several theoretical and expermintal investigations were carried to find an appropriate fluid to replace R22. From the past several years refrigerants R407C and R410A were the foremost substitues to R22 [4]. Theorotical results reported that R444B was a viable refrigerant to replace R22 [5]. Experimental results reported that R407C was a suitable retrofit candidate to R22 [6]. Experimental test was conducted in an air conditioner with R290 as a drop in refrigerant. Test results exhibited that performance of R290 was 2.8-

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