In order to boost up the practicability and advantage of evaporative cooling unit,and make the unit manufacture standard,from project optimization technology,thermotechnical calculation of plate indirect evaporative cooling and packing direct evaporative cooling unit simplified are simplified by experiment that the optimal spraying consistency are gained.

The applications of medium & high temperature steam are discussed in detail in this paper,and the characteristics of different process heat collectors including all-glass evacuated tubes collector,flat-plate collector and parabolic trough collector applied for producing the medium & high temperature steam are discussed respectively.

A novel system which integrated solar energy with CCHP(combined cooling,heating and power) system was researched,compared to traditional CCHP system,a parabolic trough collector was added,using the solar energy of middle-low temperature.

Presents the study status of direct evaporative coolers, including the performance of heat and mass transfer and purification of padding, and the application of direct evaporative coolers.

After the comparison and analysis of the current fillers in direct evaporative cooler,the porous ceramic direct evaporative cooler was proposed,while the application status of porous ceramic material and the characters of porous ceramic direct evaporative cooler were analyzed.