المجلة الدولية للعلوم والتقنية

This paper study the effect of inlet flow conditions on the counter flow double pipe heat exchanger performance. The results were obtained by both theoretical analysis and experimental data. The experimental investigation was performed on a counter flow double pipe heat exchanger at variable values of hot and cold water mass flow rates and cold and hot water inlet temperatures. Increasing hot water mass flow rate and hot water inlet temperature increase the hot and cold water outlet temperatures and the heat transfer rate between the two fluids. Increasing the cold water inlet temperature increases the hot and cold water outlet temperatures and decreases the heat transfer rate between the two fluids. The results obtained from the theoretical analysis were in agreement with those obtained from the experiments