Thermodynamic and Economic Evaluation of a Kalina Cycle

Year 2023, Volume: 13 Issue: 3, 1153 - 1168, 15.09.2023

Osman Kara , Önder Kaşka

https://doi.org/10.31466/kfbd.1311665

Abstract

Nowadays, one of the most important issues that countries pay attention to is energy, and energy consumption is increasing rapidly with constantly developing technologies. In order to meet these energy demands, the use of different fossil resource-based power technologies has become widespread. Additional problems such as the depletion of fossil resources and damage to the environment have led to increased in research on the more efficient operation of such technologies. Electricity generation by the Kalina cycle (KC) in medium- and low-temperature heat sources is one of the important technologies. The equipment of the Kalina cycle is a turbine, separator, pump, evaporator, condenser, mixing chamber, throttling valve, and heat exchangers. In this study, a model was created in order to make detailed thermodynamic analyses of the cycle in question, and the properties of all points in the system were calculated analytically using the Engineering Equation Solver (EES) program. The system performance is analyzed in terms of energy and economy depending on the turbine inlet pressure, condenser outlet temperature, and isentropic efficiency of the pump and turbine.

Keywords

Kalina cycle, Ammonia water mixture, Waste heat recovery

Bir Kalina Çevriminin Termodinamik ve Ekonomik Açıdan Değerlendirilmesi

Abstract

Günümüzde, ülkelerin en önemli dikkat ettiği konulardan bir tanesi enerjidir ve sürekli gelişen teknolojilerle enerji tüketimi de hızla artış göstermektedir. Bu taleplerin karşılanması için fosil kaynak esaslı farklı güç teknolojilerinin kullanımı yaygınlaşmıştır. Fosil kaynakların, tükenecek olması, çevreye zarar vermesi gibi farklı problemler, bu tür teknolojilerin daha verimli çalıştırılmasına yönelik araştırmaların artmasına neden olmuştur. Orta ve düşük sıcaklıklı ısı kaynaklarında Kalina çevrimiyle (KC) elektrik üretimi önemli teknolojilerdendir. Kalina çevrimini oluşturan ekipmanlar, türbin, seperatör, pompa, buharlaştırıcı, kondenser, karışım odası, kısma valfi ve ısı değiştiricileridir. Bu çalışmada, ele alınan çevrimin detaylı termodinamik analizlerini yapabilmek için bir model oluşturulmuş ve Mühendislik Denklem Çözücüsü (EES) programı kullanılarak sistemde bulunan tüm noktaların özellikleri analitik olarak hesaplanmıştır. Sistemin türbin giriş basıncı, kondenser çıkış sıcaklığı, pompa ve türbinin izentropik verimlerine bağlı olarak sistem performansı enerji ve ekonomik açıdan analiz edilmiştir.

Keywords

Kalina çevrimi, Amonyak su karışımı, Atık ısı geri kazanımı.

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