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Corresponding Author

Kandil, Mohammed

Subject Area

Mechanical Power Engineering

Article Type

Original Study

Abstract

The present work was carried out theoretically and experimentally to study the performance enhancement of the heat pipe charged with refrigerant (R-22) as a working fluid. The heat pipe heat exchangers are used in heat recovery applications to cool the incoming fresh air in air conditioning systems. The study discusses the effect of inclination angle and supply on temperature on thermal efficiency, supply off temperature (T2), thermal resistance and heat recovered of the heat pipe heat exchanger. Two streams of fresh and return air have been flowed through the heat pipe heat exchanger to investigate the performance of heat recovery system. The heat pipe heat exchanger is consisting of one row of 16 copper tubes and aluminum fins. The diameter of each copper tube is 9.53 mm. The experiments were performed due to ASHRAE standard 1060(I-P) for performance rating of air-to-air exchangers for energy recovery ventilation equipment [1]. The results showed that Heat pipe efficiency and heat recovered capacity are increased by increasing the inclination angle until reach its maximum values at (θ=30o) and then decreased with further increase in inclination angle. The results showed also that the thermal efficiency and heat-recovered capacity are increased by increasing the supply on temperature

Keywords

Heat Pipe; Saving Energy; Inclination angle; heat exchanger; Thermal Efficiency

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