Buhar sıkıştırmalı bir soğutma sisteminde R22 yerine N20 ve R444B soğutucu akışkanlarını kullanmanın termodinamik performansa etkisi

Bu çalışmada buhar sıkıştırmalı bir soğutma sisteminde R22 soğutucu akışkanı yerine N20 ve L20 (R444B) soğutucu akışkanının kullanılmasıyla enerji ve ekserji parametreleri teorik olarak incelenmiştir. Aynı çalışma şartları altında farklı evaporasyon sıcaklıkları (-15?C, -10?C, -5?C, 0?C) ve kondenser sıcaklıkları (30?C, 40?C, 50?C) için enerji parametrelerin mukayesesi yapılmıştır. Üç soğutucu akışkan için de performans katsayılarının (COP) aynı mertebede olduğu görülmüş ancak en yüksek COP değeri R22 durumunda elde edilmiştir. N20 veya R444B kullanacak olan cihazların, R22 ile çalışan sistemlere göre daha büyük kondenser yüzey alanlarının olması gerektiği anlaşılmıştır. İncelenen soğutucu akışkanlar içerisinde R22'nin ekserji veriminin daha yüksek olduğu tespit edilmiştir.

Effect on the thermodynamic performance using N20 and R444R refrigerants instead of R22 in a vapor compression refrigeration system

In this study, the energy and exergy parameters were theoretically investigated for a vapor compression refrigeration system for which N20 and L20 (R444B) refrigerants were used instead of R22. The comparison of the energy parameters was carried out for different evaporation temperatures (-15?C, -10?C, -5?C, 0?C) and condensing temperatures (30?C, 40?C, 50?C) under the same operating conditions. The coefficients of performance (COP) were seen to be in the same order of magnitude for three refrigerants, but the highest COP value was obtained with R22 case. It was seen that the equipments which will use N20 or R444B should have larger condenser surface areas compared to devices operating with R22. It was also determined that the exergetic efficiency of R22 was higher among the investigated refrigerants.

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