Volume : 7, Issue : 11, November - 2018

EFFECTS OF SUB-COOLING ON THE PERFORMANCE OF R152a AND RE170 AS POSSIBLE ALTERNATIVES IN A DOMESTIC REFRIGERATION SYSTEM

A. Baskaran, V. P. Sureshkumar, N. Manikandan

Abstract :

<p>&nbsp;</p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;text-align:&#10;justify;line-height:200%;mso-layout-grid-align:none;text-autospace:none"><span style="font-family:&quot;Times New Roman&quot;,&quot;serif&quot;;color:black;mso-bidi-font-style:&#10;italic">This paper presents the theoretical investigation of effects of sub-cooling on </span><span style="font-family:&quot;Times New Roman&quot;,&quot;serif&quot;;&#10;color:black">the<span style="mso-bidi-font-style:italic"> performance of eco-friendly alternative refrigerants (R152a, RE170 (Dimethyl ether) in a </span>domestic<span style="mso-bidi-font-style:italic"> refrigeration system. The study was performed using a vapour compression system with the aim of finding a drop-in replacement for R134a. An increase in sub-cooling effectiveness reduces the compressors power and increases the system refrigeration effect. Also, an increase in the degree of sub-cooling, reduces the refrigerant mass flow rate, compressor power and increases</span> <span style="mso-bidi-font-style:italic">both the refrigerating effect and coefficient of performance (COP) of the</span> <span style="mso-bidi-font-style:italic">system. The comparison of the performance of R134a and the investigated alternative refrigerants showed that R152a and Dimethylether (DME) have the most similar performance characteristics to R134a with DME having better </span>performance<span style="mso-bidi-font-style:italic">. These two refrigerants are the best replacements for R134a in</span> <span style="mso-bidi-font-style:italic">a domestic refrigeration system. </span><span style="mso-spacerun:yes">&nbsp;</span><o:p></o:p></span></p>