User talk:Moslemsalehi

Heat pipe heat exchanger for heat recovery equipment are aimed for recovering sensible heat and they are recommended for systems in which inlet and return air should not be mixed such as surgery rooms in hospitals and chemical and biological laboratories. The advantages of using heat pipes over conventional methods is that large quantities of heat can be transported through a small cross-sectional area over a considerable distance with no additional power input to the system, (except for the fans to drive the airstreams) together with simplicity of design and ease of manufacture [1]. Efforts have successfully developed a series of heat pipes equipment, such as heat pipes gas to gas exchangers, heat pipes steam generators, high-temperature heat pipes hot air furnaces, and progresses have been made in the fields of metallurgical, petrochemical, chemical, power and construction material industries on the basis of experimental and theoretical investigations [2,3]. Also, heat pipe heat exchangers are suitable for energy recovery in air conditioning systems in tropical countries where incoming fresh air at high ambient temperature could be pre-cooled by the cold exhaust air stream before it enters the refrigeration equipment [4]. Any study of an air conditioning system in a building should be focused mainly on indoor air quality, thermal comfort, energy saving and environmental protection [5]. Numerous investigations have been made to obtain the thermal performance, ensure efficient and reliable operation of heat pipe heat exchanger [6–10]. Simple experiment was carried out for using heat pipe heat exchanger for heating automobiles using exhaust gas [11]. It is obvious that the heat transferred by the heat pipe heat exchanger increased with the rise of exhaust gas temperature. The effects of input heat transfer rate, the working fluid filling