Analysis of choosing cold source form in dedicated outdoor air system;

Energy saving operating mode for cold source of central air conditioning systems;

As a example of a residential district,analysis of the economical efficiency of different modes of district cooling systems is carried on in initial investment and operation cost in order to supply reference to the correct choosing of cold source of distrct cooling system.

The feasibility of using geothermal water, underground water, geothermal energy (thermal energy of soil), solar energy, electric boiler and gas-fired boiler as heat and cooling sources for radiant heating and cooling system is discussed.

In view of decreasing the temperature of the base metal,the effects of the assistant cooler on the dilution rate were studied.

Preliminary study on technology for ice-making using natural cold resource based on heat pipe;

Discussion on solving overheat problem of inner zones in civil buildings in winter using natural cooling source;