Introduced in the article are the main aspects of the positive water evaporator, including the operating principle,the structural characteristics,the method for calculation of the heat-exchanging area as well as its superiorities and main advantages.

Fouling mechanism of cooler is analyzed,and regulation of fouling products and fouling resistance of cooler with the running period,the relate formula among the fouling resistance,heat exchanging coefficient and heat exchanging area are given.

Presents types of the high temperature heat pump system and the preliminary design of the heat exchanger, and programs for the system simulation, and obtains the variety patterns of several critical parameters including COP, heat transfer coefficient, water pressure drop with heat transfer area under eight different heat exchanger types.

It is illustrated that increasing the heat transfer coefficient and minimizing the heat transfer area is the ultimate objective for the process design of condensers.

The heat exchanger volume was considered as the optimization objective function; the heat transfer area required for the heat duty and the pressure drop were considered as the restrictive conditions.

Optimal design for dual-stage high temperature heat pump by heat exchange area simulation;

In order to keep the equipment running, process operation adjustment and extensive pipeline repair were conducted, and ultimately reduced the heat exchange area and change .

From the plan design,space area,storey height,wideness,direction and other aspects the rationality and amenity of house type are analyzed in order to design favorable house type and create natural and comfortable dwelling environment for residents.