Comparative analysis of the performance and exergy efficiency of absorption cooling system for different working fluids

Öz

Bu çalışmada, termodinamiğin birinci ve ikinci kanunları, tek etkili absorpsiyonlu soğutma sisteminin enerji ve ekzerjik verimliliğini değerlendirmek için kullanılmıştır. Absorpsiyonlu soğutma sisteminde çalışma sıvısı olarak LiBrH2O, LiSSC ve LiCl-H2O kullanılmıştır. Farklı çalışma akışkanları için çeşitli çalışma koşullarında enerji, ekzerjetik verimlilik ve sirkülasyon oranı değerleri incelenmiştir. Sonuçlar, LiCl-H2O solüsyonlu absorpsiyonlu soğutma sisteminin farklı çalışma sıcaklıkları için en yüksek COP ve ekzerjik verimlilik değerine sahip olduğunu gösterdi. Ayrıca her bir sistem bileşeninin tersinmezlik değerleri hesaplanmıştır. Sonuçlar, jeneratörde ve soğurucuda maksimum tersinmezliğin oluştuğunu gösterdi. Tüm analizlerde EES programı kullanılmıştır. Bu çalışmadan elde edilen sonuçlar absorpsiyonlu soğutma sisteminin optimizasyonu ve optimum çalışma koşullarının elde edilmesi için kullanılabilir.

Anahtar Kelimeler

• Absorpsiyonlu soğutma
• Enerji Analizi
• Ekserji Analizi
• Tersinmezlik
• Çalışma Akışkanları

Comparative analysis of the performance and exergy efficiency of absorption cooling system for different working fluids

Öz

In this study, the first and second laws of thermodynamics have been employed to evaluate energy and exergetic efficiency of the single effect absorption cooling system. LiBrH2O, LiSSC and LiCl-H2O were used as working fluid in the absorption cooling system. The energy, exergetic efficiency and circulation ratio values at various operating conditions for different working fluids were investigated. The results showed the absorption cooling system with LiCl-H2O solution has the highest COP and exergetic efficiency value for different operating temperatures. In addition, the irreversibility values of each system component were calculated. The results showed that maximum irreversibility was occurred in the generator and absorber. EES program was used in all analyzes. Obtained results from this study can be used for optimization of absorption cooling system and obtaining optimum operating conditions.

Anahtar Kelimeler

• Absorption Cooling
• Energy Analysis
• Exergy Analysis
• Irreversibility
• Working fluids

Kaynakça

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