New High Efficiency Heat Pipe Air Conditioning System, Energy-saving Devices

Owing to the distance between fresh air and exhaust air, conventional energy recovery equipments need to build long air pipes to bring cold air and hot air together for energy exchange, which is not cost-effective or practicable. Thus the paper has proposed separated type heat pipe be applied to the energy recovery in air condition system, which is able to avoid complex pipe design led by large amount fluid transfer and recover efficiently low quality energy in exhaust air. Separated type heat pipes in air condition systems can reduce the load of the refrigerator and heater, which is energy saving.In this paper, a theoretical and experimental investigation on the whole energy transportation and condensation performance of the condensation section was conducted. First, based on the structure, working principle and application condition of the separated type heat pipe, taking single heat pipe as physical model for analysis, combined with analysis of heat transfer, adopting some experience formulas, a mathematical model was developed. The program was put forward by virtue of Visual Basic. The program put out results on heat transfer coefficient of the condensation section and on optimum charge at different working temperature. The model has provided an effective method for analysis of the problem.Secondly, based on Nusselt's theory and the characteristics of the heat transfer in the condensation section, the analysis was conducted and the fundamental theoretical solution was established. The temperature of exhaust, the flux of exhaust, the temperature of the evaporation section and the amount of working fluid have the influence on heat transfer of the evaporation section. At last, the experiment was conducted measuring the degree of the influence. On the basis of the experiment data, some results were discussed and some conclusions was erected. The solution has provided scientific basis for application of the separated type heat pipe. Furthermore, It calculates the value of saved exhaust air energy and its economic efficiency, as well as compares heat pipe heat exchanger with rotary total heat recovery system.