The principle of the heat pump for air conditioning and hot water supplying is introduced, the quantity of electricity conserved and consumption decreased was calculated.

The principle of air conditioning and hot water supplying combined heat pump is introduced.

This paper probes into the technical measures for improving the economy of the hot water heating from two aspects of the supply and return water temperature and the specific pressure drop, and expounds the paths for improving the economy of hot water heating from the angle of operation management.

In this paper,compared with hot water heating system and steam heating system,it was found that hot water heating system have more advantages which are stability,safety and healthy.

Comparison and application of the schemes for steam and hot water heating;

Reforming and rethinking for a vertical double-pipe hot water heating system with up-supply and up-return mode;

Use of an energy efficiency index in hot water heating systems;

Analysis on the condition of hot water supply in district heating system;

Experimental research on the dynamic characteristics of the energy-saving type air conditioner with domestic hot water supply;

Legionella pneumophila which is caused by the air conditioning and hot water supply system can not be ignored for threatening health.

Analysis of the hot-water supply benefit of the solar water heater;

Therefore,this conclusion should be taken into account when we study how to select one circulation pump with reason in a hot-water supply system.

Probability calculation method of design flow rate for domestic hot water supply;

The heat pump air conditioner with domestic hot water supply (HPACDHWS) presented in this dissertation is a novel saving-energy heat pump device.