The Simulation Calculation And Design Of Thermosiphon Dehumidification System

The application of the thermosyphon-based heat exchanger in the dehumidification system is still in the research stage, although it has a bright prospect for application because of its good heat transfer performance and structural feature, but because of the working environment and special role in the dehumidification system, it has different thermal performance compared with the occasions used in industrial waste heat recovery. In this paper, the thermosyphon heat pipe dehumidification system was made and the simulation was completed. The author used the experimental results to verify the simulation reliability and explored the optimization of the system design initially.After the comprehensive analysis of the calculation method of thermosyphon-based heat exchangers, the evaporator and condenser of the dehumidification system, the structure of the thermosyphon heat pipe dehumidification system used for performance test was determined. The author divided the dehumidification system into the thermosyphon-based heat exchanger and the traditional four parts of the air-conditioning system. This five-part mathematical model was established and the thermosyphon heat pipe dehumidification system simulation software was compiled by use of the Visual Basic language. Also the author used the program to analyze the outside working parameters and the main structural parameters of thermosyphon-based heat exchanger influencing the performance, which were the moisture removal capability per input power and sensible heat ratio.In order to verify the reliability of the simulation results, the two thermosyphon-based heat exchangers were studied by the experiment respectively. The author obtained the experimental results under different filling rate, and analyzed the difference between the experiment and simulation results. The relative errors were within a certain range, indicating that the simulation results and experimental results were basically tallies. On the basis of the depth analysis of the experimental results, the relationship among the enthalpy difference and the dehumidification capacity per unit power and wet coefficient in the evaporator was also fitted. It would provide a theoretical basis for the depth study of the thermosyphon heat pipe dehumidification system. Also in this paper, the mathematical model of the thermosyphon-based heat exchanger was applied to study the heat exchanger optimization method.As the conclusion, an integrated design program for the thermosyphon-based heat exchanger applied in dehumidification system was established, which improved the structure of the thermosyphon heat exchanger. The studies of simulation optimization would provide a basis for the application of thermosyphon heat exchanger in the dehumidification system.