Toprak Kaynaklı Bir Isı Pompasında R410A’ya Alternatif Soğutucu Akışkanların ASHRAE Sınıflandırmasına Göre Teorik Olarak İncelenmesi

Günümüzde çevre kirliliği ve küresel ısınma global bir tehdit haline gelmiştir. Yenilenebilir enerji kaynaklarının kullanımı bu sorunun üstesinden gelmek için akılcı bir yaklaşımdır ve toprak kaynaklı ısı pompaları da bu yaklaşımda önemli bir yer tutmaktadır. Fakat bu sistemlerde kullanılan soğutucu akışkanlar çoğunlukla belirlenen normların üzerinde küresel ısınma potansiyeline sahiptir. Bu çalışmada Engineering Equation Solver paket programı kullanılarak R410A alternatif soğutucu akışkanların performans değerleri ve çevresel etkileri deneysel çalışmadan elde edilen veriler yardımıyla ASHRAE güvenlik gruplarına göre teorik olarak analiz edilmiştir. Sonuçlar R32’nin, COP değerini %3.1 artırdığını, kütlesel debiyi %35’e yakın düşürdüğünü göstermiştir. Ayrıca çalışmada R152a'nın en başarılı sonuçları sağladığı hesaplanmıştır. R152a, R410A'ya kıyasla COP'ta %8,5'lik bir artış sağlamıştır. Çevre Koruma Ajansı tarafından alternatif soğutucu akışkan olarak belirtilen R452B, R454B ve R454C'nin işletme maliyetlerinin R410A'dan daha yüksek olduğu gözlemlenmiştir. Çalışmada R454C'nin her açıdan en düşük değerlere sahip olduğu belirlenmiştir. R410A yerine R32 kullanılmasının CO2 eşdeğeri emisyonlarını yaklaşık %2.54 oranında azalttığı hesaplanmıştır.

Anahtar Kelimeler:

Isı pompası, Toprak kaynaklı ısı pompası, R410A, Alternatif soğutucu akışkanlar, GWP, Birinci kanun analizi, COP

Theoretical Examination of Alternative Refrigerants for R410A in a Ground Source Heat Pump According to ASHRAE Classification

Today, environmental pollution and global warming have become global threats. The use of renewable energy sources is a rational approach to overcome this problem, and ground source heat pumps also play an important role in this approach. However, the refrigerants used in these systems often have global warming potential values above the specified norms. In this study, using the Engineering Equation Solver package program, the performance values, and environmental effects of R410A alternative refrigerants were analyzed theoretically according to ASHRAE safety groups with the help of the data obtained from the experimental study. The results showed that the R32 increases the COP value by 3.1% and reduces the mass flow rate by nearly 35%. It has been calculated that R152a provides the most successful results in the study. R152a provided an 8.5% increase in COP compared to R410A. It has been observed that the operating costs of R452B, R454B and R454C, which are specified as alternative refrigerants by environmental protection agency, are higher than R410A. In the study, it was determined that the R454C has the lowest values in all respects. It has been calculated that using R32 instead of R410A reduces the CO2 equivalent emissions by approximately 2.54%.

Keywords:

Heat pumps, Ground-source heat pump, R410A, Alternative refrigerants, GWP, First law analysis, COP,

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