Research On The Application Of Heat-pipe Technology In Highly Intensified Diesel Engines

The development direction of propulsion system in vehicles is high-compact, high-performance, and high-reliability. The engine heat load is increasing with the increasing of engine speed and power density, this requires the cooling systems and the lubrication systems having high performance. Vehicles cooling technology is one of the core technologies of auxiliary system in the engines. So, searching for small size, high efficiency heat transfer equipment has become the key but difficult process of developing a new generation of engines.Using the efficient component or high temperature cooling system are two valid ways to resolve this problem. Owe to the extensive application of heat-pipe and its characteristics, it may well be a meaningful exploration using the heat-pipe cooling technology for the heat-exchanger components in diesel engine cooling systems.Based on the heat transfer theory, the calculation methods of heat-pipe heat-exchanger were summarized in this paper. According to the common calculation method of heat-pipe heat-exchanger, the common procedure for heat-pipe heat-exchanger was compiled using VB language. In order to make the procedure more practical, more feasible and more easily for secondary development, this calculation procedure is linked with the Excel and AutoCAD. Using this procedure, you can get the Excel statements and AutoCAD graphics conveniently.In this paper, a heat-pipe heat-exchanger was designed using the calculation program, and bench performance tests were carried out. The calculation procedure was amended by using 3 groups test data and the accuary of the amended procedure was verified by using other 4 groups test data. The results proved that the procedure is reliable and practical.Finally, as the practical application of the research results, a heat-pipe oil-cooler was designed according to the request of the cooling system in highly intensified diesel engines. In addition, the author analyzed the factors influencing the performance of heat-pipe oil-cooler and the structure size of the heat-pipe oil-cooler was settled after repeated calculations.