Abstract:Heat pipe heat exchangers are widely used in waste heat recovery due to their excellent heat transfer performance.In this paper,based on the research background of a 58 MW circulating fluidized bed boiler in a power station,the optimization design software of the ultra-low temperature heat pipe air preheater is compiled by using VC++ and MFC class library technology.The software has a visual parameter input and output interface,and integrates the fluid thermodynamic properties calculation model interface.Through a series of calculation processes such as logarithmic average temperature difference method,discrete method and flow resistance check,heat exchanger design for different fluids can be realized.The results of the optimized design show that the length of the flue gas side and the height of the fins have optimal values,and the fin spacing and fin thickness have the greatest influence on the air preheater.