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AN EXPERIMENTAL STUDY FOR THE EFFECT OF CAPILLARY TUBE DIAMETER ON REFRIGERATOR PERFORMANCE WITH NEW ALTERNATIVE REFRIGERANT MIXTURE TO R134A

Author: Ali K. Al-Sayyab
Journal: KUFA JOURNAL OF ENGINEERING مجلة الكوفة الهندسية ISSN: 25230018 Year: 2018 Volume: 9 Issue: 2 Pages: 31-44
Publisher: University of Kufa جامعة الكوفة

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Abstract

In this work, the effect of capillary tube diameter on refrigerator performance is studied for refrigerants R134a, R290, R600a and its mixture which named: RMix1(70%R134a,20%R290,10%R600a), RMix2(70%R134a,10%R290,20%R600a), RMix3.(50%R134a,20%R290,30%R600a), RMix4 (60%R134a,20%R290,20%R600a). The three adopted capillary tubes diameter are 1.4 mm, 1.8 mm and 2.2 mm, named capillary1, capillary2 and capillary3 respectively. The experimental work show that, the refrigerator operates in 2.2 mm capillary tube's diameter with R134a gives the highest COP from other refrigerants with the same diameter, where the performance of refrigerator with capillary tube of 1.4 mm and alternative ozone friendly refrigerant RMix2 give 1.3% COP reduction from base case of R134a .

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