Characteristics Analysis Of Separate Heat Pipe And Application Of Heat Recovery Air-Conditioner

Much of the energy conservation for increasing of building energy consumption and appearance of power intensity are drawn attention. There are many ways to save energy in air-conditioning, and exploitation of heat recovery facility is important one. Preheating/cooling outdoor fresh air with heat recovery facilities is a good way not only to reduce energy consumption and add fresh air quantity, but to improve indoor air environment and create healthy indoor climate.This thesis aims to obtain energy conservation in a window-type air conditioning room. Separate heat pipe heat recovery facility was designed and developed. However, indoor air environment and air conditioner frosting have been changed with the heat recovery facility. Details would be discussed in the following.Firstly, the research background and practice significance are presented out. Heat pipe development history and its up to date states in the whole world have been reviewed. Reference analysis shows that heat recovery facility in air conditioning is an efficient way for both energy conservation and health.Critical value of the initial filling ratio of working fluid has been discussed, a one-dimensional mathematic model has been developed to calculate the correlations of upper and lower running boundaries. Parametric analysis is applied to study the influence of the working fluid evaporating temperature, characteristics of heat pipe cross-section, heat throughput and the types of working fluid on the initial filling ratio boundaries. The results show that different parameters have different influence on initial filling ratio boundaries. The lower boundary is mostly affected by the working fluid evaporating temperature and the length of evaporator; nevertheless, the upper boundary is greatly influenced by the sectional hydrodynamic radius. And different types of working fluid would vary running envelope. An experiment scheme is designed to validate the theory results.A separate heat pipe facility for window-type air conditioner was developed. The performance experiment was carried out. The main purpose of the experiment is to check out how the other parameters affect the heat pipe when its structure is fixed. The influences of the start up temperature, initial filling raito of working fluid and indoor air temperature were studied. The results indicate that the initial filling ratio of working fluid has great effect on the heat recovery efficiency.