KABUL, Ahmet Süleyman Demirel Üniversitesi - Teknik Eğitim Fakültesi - Makine Eğitimi Bölümü, Turkey , KIZILKAN, Önder Süleyman Demirel Üniversitesi - Teknik Eğitim Fakültesi - Makine Eğitimi Bölümü, Turkey , YAKUT, Ali Kemal Süleyman Demirel Üniversitesi - Teknik Eğitim Fakültesi - Makine Eğitimi Bölümü, Turkey

THEORETICAL AND EXPERIMENTAL INVESTIGATION OF HEAT TRANSFER COEFFICIENT FOR SHELL AND TUBE HEAT EXCHANGER

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Scope of this study is to investigate the heat transfer coefficient in terms of different system parameters in a shell and tube heat exchanger equipped in a refrigeration system using R404a. For this aim, an experimental system was built up. The effects of evaporator pressure and temperature, refrigerant mass flow rate and cooling water mass flow rate on heat transfer coefficient were investigated. Experiments were made for evaporator pressure of 2.73-5.76 bar and refrigerant mass flux rate of 64.64-152.68 kg/m^2 s. The shell and tube heat exchanger is 60 cm in length and consist of 9 tubes which are 8 mm in inner diameter and 10 mm in outer diameter. Overall heat transfer coefficient during boiling was calculated using the results of the experiments. After calculating the experimental results, overall heat transfer coefficient during boiling was recalculated using three different equations proposed by some researchers. The calculated results were compared with experimental results.

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shell and tube heat exchanger , boiling , heat transfer coefficient

Sdu International Technologic Science

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