Considers that in the future residential air conditioning in large cities should be directed toward district heating/cooling and cogeneration of heating/cooling and power while in middle and small cities or suburb areas,the so called household air conditioning should be promoted and for apartments for singles or shared occupancy,the room air conditioners are desirable, and that these ways a.

Selection of chillers for central cooling in underground railway systems;

Treats some ways to better economics including the applications of frequency control technology, transient comfort concept, shield door system, central cooling, large difference in air supply temperature and proper selection of equipment, etc.

Because of the improvement of the airconditioning technology,such as Central cooling and Thermal storage,provide a large scale of energy saving,besides this article also bring forward a idea of using the Artificial NN in the control system to maximize the effect of energy saving and improve the comfortable feeling.

This paper points out the method for analysis of energy consumption in variable water volume(VWV) system, and calculates annual energy consumption of different schemes for distribution system of a district cooling system in residential area.