IJE TRANSACTIONS A: Basics Vol. 31, No. 1 (January 2018) 157-163   

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C. S. Choudhari and S. N. Sapali
( Received: August 26, 2017 – Accepted in Revised Form: November 30, 2017 )

Abstract    This paper presents environment friendly refrigerant R290 as a solution to the environmental concerns like depletion of ozone layer and rise in global warming because of wide use of synthetic refrigerants R22 and R134a. The water cooler is the widely used refrigeration application in warm climatic countries. Refrigerant R22 and R134a are predominantly used refrigerants in water cooler refrigeration systems. These refrigerants are to be phased out as per the international agreements, Kyoto and Montreal protocol. This experimental study investigates the applicability of the environment friendly refrigerant R290 for applications, especially in warm climate sub-tropical and tropical countries like India. A water cooler test facility of a nominal cooling capacity 1.5 kW is especially designed, developed for R290 and its performance is investigated at different operating conditions. Performance parameters like cooling capacity, discharge gas temperature and coefficient of performance are analyzed. Results showed that compressor energy consumption and discharge gas temperatures are lower for the water cooler refrigeration system. The overall performance of the especially developed system for water cooler application proved that R290 can be a better alternative refrigerant with respect to energy efficiency and greenhouse impact as a replacement to R22 and R134a.


Keywords    COP, Experimentation, Refrigerant R290, Water Cooler


چکیده    این مقاله مبرد دوستدار محیط زیست R290 را به عنوان یک راه حل برای نگرانی های زیست محیطی مانند حذف لایه ازن و افزایش گرم شدن کره زمین به دلیل استفاده گسترده از مبرد های مصنوعی R22 و R134a ارائه می دهد. کولر آبی، مبردی با کاربرد گسترده در کشورهایی با آب و هوای گرم است. مبرد R22 و R134a مبردهایی هستند که عمدتا در سیستم های کولر آبی استفاده می شوند. این مبرد ها طبق توافقنامه های بین المللی، پروتکل کیوتو و مونترال منسوخ شده اند. این مطالعه تجربی، کاربرد مبرد R290 دوستدار محیط زیست را برای برنامه های کاربردی، به ویژه در کشورهای گرمسیری و گرمسیری گرم مانند هند، مورد بررسی قرار می دهد. تست خنک کننده آب با ظرفیت خنک سازی اسمی ۵/۱ کیلو وات به طور ویژه طراحی شده و برای R290توسعه یافته و عملکرد آن در شرایط عملیاتی مختلف مورد بررسی قرار گرفته است. پارامترهای عملکرد مانند ظرفیت خنک کنندگی، دمای گاز تخلیه و ضریب عملکرد تجزیه و تحلیل می شود. نتایج نشان داد که مصرف انرژی کمپرسور و دمای تخلیه گاز برای سیستم مبرد کولر آبی پایین تر است. عملکرد کلی سیستم ویژه توسعه یافته برای استفاده از کولر آبی ثابت کرد که R290 می تواند با توجه به بهره وری انرژی و تاثیر گلخانه ای مبرد بهتری به عنوان جایگزینR22 و R134aباشد.


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