Study On Cold Air Distribution System Used With Ice-Storage And Ground Source Heat Pump

In recent years, the policy of energy conservation and pollutant emission reduction has been one of the most important items in the government work report. The scarce resources are increasingly reduced. The human habitat suffers the threat. Both of them make the air conditioning domain full of challenge and responsibility. Energy conservation seems more significant in the electric power profession which is one of the basic national economy industry. And that, the electricity used in the air conditioning domain accounts for the very major part of the total uses in China. Therefore, it is inevitable to require saving energy in this area. The ice storage technology is developped quickly under this situation. The pure ice storage technology can shift on-peak power to off-peak periods, and the operating cost is lower than that of the conventional system. However, the enormous and complicated ice-storage air conditioning system makes the investment of the cold source and the actual energy consumption exceed the conventional system. So, the cold air distribution emerges as the times require. The ground source heat pump system is advocated by the government for its saving energy and protecting the environment. By operating with the ice-storage technology, it can let the users use not only the low-cost subterranean heat but also the comfortable cooling supplied by ice-storage system.This paper expatiates the principle of the union of the ground source heat pump and the ice storage technology, as well as the basic principles and methods of design. It also analyzes the energy saving effect while using the ground source heat pump in the ice-storage and cold air distribution system, and then analyzes the process of the cold air distribution combining with the air-to-air total heat exchanger or the dry air-conditioning equipment in the psychrometric chart. Whereafter, the right means of confirming the state point in which the fresh air goes through the equipment can be advanced. After studying on the air jet flow theory, we get the formulas which are used to solve the tuebulent flow coefficient of the jet flow in the plan or the round section.Later, it simulates the air distribution in the office room of the actual project, points out the weak points, and then puts forward the resolvent. It also simulates the condition when using double deflection grille to send air. During this experiment, it can find that the diffusivity in landscape orientation of the double deflection grille is low, which induces the appearance of air curtain phenomenon. So the double deflection grille is not suitable to be used in the air conditioning room where with lower efficient highness such as the office room.We establish a radiant floor cooling system, and study on the theoretic method of defending the dew problem in this system with the cold air distribution.At last, the paper summarizes the application foreground of the cold air distribution system, and advances the development direction in this area.