ENERGY, EXERGY AND THERMOECONOMIC ANALYSİS OF A NATURAL GAS ASSİSTED GEOTHERMAL CENTRAL HEATING SYSTEM

Öz

In this work, a natural gas assisted geothermal central heating system in northwestern Turkey utilising low enthalpy geothermal fluid and natural gas as the sources for space heating was analyzed.The study comprised energy, exergy and thermoeconomic analyses of the system under hybrid operating conditions (i.e., from 1 January 2020 to 31 March 2020). The data were collected from a basis of the facility which operates the system. The values about the heat pumps were obtained from the department of the sales company in Istanbul, Turkey and the ‘Average Values for Hybrid Case’ were determined. This work covers energetically, exergetically and thermoeconomically assessment of the system in question through its all stages. The results were found with regard to the system performance investigation. The whole system efficiencies of energy and exergy were found as 56.77% and 49.93% respectively. The exergy cost value per hour and the thermoeconomic factor were calculated as 411.242 €/h and 9.8% respectively.

Anahtar Kelimeler

• Energy
• Exergy
• Thermoeconomic analysis

Bir Doğalgaz Destekli Jeotermal Merkezi Isıtma Sisteminin Enerji, Ekserji ve Termoekonomik Analizi

Öz

Bu çalışmada, alan ısıtması için kaynak olarak düşük entalpili jeotermal akışkan ve doğalgaz kullanan ve Türkiye’nin kuzeybatısında bulunan doğalgaz destekli bir jeotermal merkezi ısıtma sisteminin analizi yapılmıştır. Çalışma, sistemin hibrit çalışma şartları altında (1 Ocak 2020’den 31 Mart 2020’ye kadar) enerji, ekserji ve termoekonomik analizden oluşmaktadir. Veriler sistemi kullanan işletmeden toplanmıştır. Isı pompalarına ait kapasite değerleri ise satıcı firmanın İstanbul, Türkiye’deki şubesinden elde edilmiştir ve ‘Hibrit Durum İçin Ortalama Değerler’ tespit edilmiştir. Bu çalışma, söz konusu sistemin tüm aşamalarındaki enerjetik, ekserjetik ve termoekonomik değerlendirmesini kapsamaktadır. Sonuçlar, sistem performansının incelenmesine dayalı olarak bulunmuştur. Tüm sistemin enerji ve ekserji verimi sırasıyla %56,77 ve % 49,93 olarak bulunmuştur. Saatlik ekserji maliyeti ve termoekonomik faktör sırasıyla 411,242 €/h ve %9,8 olarak hesaplanmıştır. 

Anahtar Kelimeler

• Enerji
• Ekserji
• Termoekonomik analiz

Kaynakça

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