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Adsorbsiyonlu Bir İklimlendirme Sisteminin İkinci Yasa Analizi

Second Law Analysis of an Adsorption Air-Conditioning System

Journal Name:

  • Cumhuriyet Üniversitesi Fen Fakültesi Fen Bilimleri Dergisi

Publication Year:

  • 2016

Key Words:

Keywords (Original Language):

Author NameUniversity of Author
Abstract (2. Language): 
Air conditioning systems are designed to improve people's living standards and provide comfort. The use of this system brings together with environmental problems, energy consumption and costs. These problems can be reduced by making studies on energy efficiency and saving in air conditioning systems. Adsorption (dehumidification, desiccant) air conditioning systems, which have widely being used in recent years, can be evaluated in terms of energy efficiency. In this study, a desiccant based air-conditioning system was considered to evaluate the system performance by using second law analysis (exergy analysis) for Yozgat province. Psychometric properties for each state and system performance parameters were calculated using Engineering Equation Solver (EES). It was found from the results that maximum exergy destruction occurs in electric heater unit and the total exergy destruction of the system is 24.66 kW. It was also found that the exergy efficiency of this system is 19.87 %. The results showed that this system can be used for air conditioning in Yozgat climate conditions and the performance of the system can be increased by using waste heat or renewable energy resources for regeneration heat.
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Abstract (Original Language): 
İklimlendirme sistemleri insanların yaşam standartlarını yükseltmek ve konfor sağlamak için tasarlanmaktadır. Bu sistemlerin kullanımı enerji tüketimi, enerji maliyetleri ve çevre problemlerini de beraberinde getirir. Bu problemler, iklimlendirme sistemlerinde enerji verimliliği ve tasarrufuna yönelik çalışmalar yapılarak azaltılabilmektedir. Enerji verimliliği açısından değerlendirilebilecek iklimlendirme sistemlerinden biride son yıllarda yaygın bir şekilde kullanılmakta olan adsorbsiyonlu (nem almalı, desisif) iklimlendirme sistemleridir. Bu çalışmada, nem almalı bir iklimlendirme sistemi ele alınarak sistem performansı, ikinci yasa analizi (ekserji analizi) yapılarak Yozgat iklim şartları için değerlendirilmiştir. Sistemde bulunan bütün noktaların psikrometrik özellikleri ve sistem performans parametreleri, Engineering Equation Solver (EES) programı kullanılarak hesaplanmıştır. Yapılan çalışma sonunda ele alınan sistemde en çok tersinmezliğin (ekserji yıkımı) ısıtma ünitesinde meydana geldiği ve sistemin toplam tersinmezliğin 24.66 kW olduğu tespit edilmiştir. Ayrıca sistem ikinci yasa (ekserji) verimi %19.87 olarak hesaplanmıştır. Elde edilen sonuçlardan sistemin Yozgat iklim şartlarında iklimlendirme uygulamalarında kullanılabileceği ayrıca bu tür sistemlerde rejenerasyon ısısının elde edilmesinde atık ısı veya yenilenebilir enerji kaynaklarının kullanımıyla sistem performansının arttırılabileceği belirlenmiştir.
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