Heat Pipe Air Preheater Overall Optimization And Cad Research

With high efficiency in heat transferring, heat-pipe is a new king of component ordevice. The heat transfer of heat pipe is carried out by phase change of the medium and continuous loop of the medium. The heat pipe technology on heat transfer and supervising in space science has been solved. The heat pipe is now used widely in industrial engineering. The heat pipe exchanger has the advantages of compact, controlling erode of acid dew point, high efficiency, low pressure drop loss and reliability, so they are used widely in heat energy utilization and waste heat recovery. It is also helpful to recover the waste heat, save the raw materials and reduce the production costs. Economic benefit from application is obvious.Heat pipe exchanger has many types, so it is important to know how choose suitable one in engineering application. This thesis focuses on the overall optimal design of pipe parts and head pipe exchanger. An example is also presented to stand for the typical heat pipe heat exchanger (that is, head-pipe air pre-heater). The specific details and methods are introduced in the integrated optimal design and the optimal selection for head pipe heat exchangers. The method how to analysis practical problems and determine design parameters and constraints are given to solve practical process and technical conditions. In order to optimize the heat pipe diameter, space of fin, pipeline space, thickness of fin and windward velocity of flow are selected as optimal parameters. Some of them such as head pipe diameter, space of fin in cold liquid side, pipeline spacing, thickness of fin in cold liquid side and thickness of fin in hot liquid side are dispersing variable. Windward velocity of flow is optimized. We use combinatorial method for dispersing variable and use plural adjusting optimum method for successive variable. The maximal net investment income is considered as object function and a mathematical model about the optimum design was established and optimal answer is obtained by adopting limit illustration method and plural adjusting optimum method.The computer program of the optimal selection for heat-pipe pre-heater is developed. According to comparison the optimization result with the conventional design result, it shows that program can optimize to determine the sizes of parts of heat-pipe p re-hate and give the most optimal parameter. The equation of the maximal net investment income can assist the optimal selection for pre-heater. So the method can save initial investment and cut operating cost obviously. The software can also optimize p re-hate with different medium and can be used as counsel of engineering design and provide design philosophy for engineering application.