COMPARATIVE EXPERIMENTAL EVALUATION ON HEATING PERFORMANCE OF A MOBILE AIR CONDITIONING SYSTEM USING R134A, R1234ZE(E), R152A and R444A

Öz

In this study, the use of R1234ze(E), R152a and R444a as alternative to R134a in a mobile air conditioning (MAC) system are tested. The performance characteristics of R134a, R444a, R1234ze(E) and R152a were experimentally examined in a MAC system by changing the air temperatures. Besides, the influence of compressor volume when the system operates with R1234ze(E) was investigated. The results show that the heating performance of R152a are higher than those obtained from R134a, R444a, R1234ze(E). Additionally, R1234ze(E) has lowest heating capacities among the low GWP refrigerants investigated. The heating performance of R1234ze(E) increased along with increasing the total compressor volume. Finally, R444a, R152a and R1234ze(E) can be used as alternative to R134a in MAC systems when the necessary improvements are made.

Anahtar Kelimeler

• Mobile air conditioning system
• R134a
• R1234ze(E)
• R152a
• R444a

R134A, R1234ZE(E), R152A ve R444A SOĞUTUCU AKIŞKANLARINI KULLANAN BİR MOBİL İKLİMLENDİRME SİSTEMİNİN ISITMA PERFORMANSININ KARŞILAŞTIRMALI DENEYSEL DEĞERLENDİRİLMESİ

Öz

Bu çalışmada, R134a'ya alternatif olarak R1234ze(E), R152a ve R444a soğutucu akışkanlarının bir mobil iklimlendirme sisteminde kullanımı test edilmiştir. Hava sıcaklıkları değiştirilerek R134a, R444a, R1234ze(E) ve R152a'nın performans özellikleri deneysel olarak incelenmiştir. Ayrıca, sistem R1234ze(E) ile çalışırken kompresör hacminin etkisi araştırılmıştır. Sonuçlar, R152a’dan elde edilen ısıtma performansı değerlerinin R134a, R444a ve R1234ze(E)'den daha yüksek olduğunu göstermektedir. Ayrıca, R1234ze(E) en düşük ısıtma performansı değerlerine sahiptir. R1234ze(E)’nin ısıtma kapasitesi, toplam kompresör hacminin artmasıyla birlikte artmıştır. Son olarak, R444a, R152a ve R1234ze(E), gerekli iyileştirmeler yapıldığında mobil iklimlendirme sistemlerinde R134a'ya alternatif olarak kullanılabilir.

Anahtar Kelimeler

• Mobil iklimlendirme sistemi
• R134a
• R1234ze(E)
• R152a
• R444a

Kaynakça

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