Journals / Isı Bilimi ve Tekniği Dergisi / 2014 / Cilt: 34 - Sayı: 2

Second Law Analysis of an Environmentally Friendly R290/R600/R600a Mixture in a Water-Cooled Heat Pump Unit

Çevre Dostu R290/R600/R600a Karışımının Su Soğutmalı Isı Pompasındaki İkinci Kanun Analizi

Pages
19–28
Publication Date
2014-06-01
DOI
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AI Summary & Key Takeaways

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⚡ TL;DR(Too Long; Didn't Read)

Higher energy consumption and lower rational efficiencies can be resolved by a hermetic compressor with higher sweep volume which is compatible with pure and mixture hydrocarbons

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, second law analysis of environmentally friendly R290/R600/R600a mixture at a rate of 45/46/9 % by mass fraction has been experimentally executed on a water-cooled heat pump as a substitute for HFC134a at varying air and water mass flow rates.
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Key Findings & Data:Experimental outputs indicate that the heat pump system shows the highest exergy efficiency at 0.040 kg s-1 of water mass flow rate and 0.1 kg s-1 of air mass flow rate running with both R134a and HC mixture.
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Conclusion & Impact:Higher energy consumption and lower rational efficiencies can be resolved by a hermetic compressor with higher sweep volume which is compatible with pure and mixture hydrocarbons
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:R134a · Hidrokarbon karışım · Isı pompası

Abstract

In this study, second law analysis of environmentally friendly R290/R600/R600a mixture at a rate of 45/46/9 % by mass fraction has been experimentally executed on a water-cooled heat pump as a substitute for HFC134a at varying air and water mass flow rates. Experimental outputs indicate that the heat pump system shows the highest exergy efficiency at 0.040 kg s-1 of water mass flow rate and 0.1 kg s-1 of air mass flow rate running with both R134a and HC mixture. Even though proposed HC mixture has lower COP and rational efficiencies, cooling exergy efficiency of HC mixture is 2-3% better than that of R134a. Higher energy consumption and lower rational efficiencies can be resolved by a hermetic compressor with higher sweep volume which is compatible with pure and mixture hydrocarbons

Özet

Bu çalışmada, HFC134a soğutucu akışkanının yerine, kütlesel olarak 45/46/9 % karışım oranlarına sahip çevre dostu R290/R600/R600a karışımının, su soğutmalı ısı pompasında değişik hava ve su debileri için ikinci kanun analizi yapılmıştır. Deneysel sonuçlar, ısı pompası sisteminin en yüksek ekserji veriminin, R134a ve HC karışımlarının her ikisinde de su ve hava için sırasıyla 0.040 kg s-1 ve 0.1 kg s-1’de elde edildiğini göstermiştir. HC karışımı COP ve verim açısından daha düşük bir performansa sahip olmasına rağmen, HC karışımının soğutma ekserji veriminin R134a’dan %2-3 daha iyi olduğu görülmüştür. Yüksek enerji tüketimi ve enerjinin rasyonel kullanımı ile ilgili problemler, saf ve karışım HC’lara uygun büyük süpürme hacmine sahip kompresör

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Cite This Article

MENLİK, T., ÖZCAN, H., ARCAKLIOĞLU, E. (2014). Second Law Analysis of an Environmentally Friendly R290/R600/R600a Mixture in a Water-Cooled Heat Pump Unit. Isı Bilimi ve Tekniği Dergisi, Cilt: 34 - Sayı: 2, 19–28. https://ajindex.com/articles/133440

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