Water flow rate through terminal devices in an air condition water system with a single pump is controlled by the bypass valve when the air conditioning system is under part-load.

The water flow rate through the terminal devices in water system with single pumps is controlled by the by-pass valves when the air conditioning system is under part-load.

Base on the analysis of the classical design problems,a new model of dedicated outdoor air systemwith parallel distributed sensible terminal equipment was introduced in the article to keep up with the situation ofsafety and energy conservation of modern HVAC design.

There is no TCP/IP and PPP in the GPRS module and many terminal equipments?熏 so these make the application in terminal equipments is too hard.

A load control center with distributed C/S structure is designed,and the practicable terminal equipment (FRTU)is also designed for storied buildings with more households,which can collect hundreds of power parameters.

Some methods suitable to reliability analysis for the terminal equipments of automatic fare collection (AFC) system operated actually of rail transit have not been found as yet.