Air Conditioning Cold Water Variable Flow Systems To Optimize The Design And Control

Although the cooled water system has been carefully studied and developed in the equipment disposal, control strategy and system design during the recent tens of years, the cooled water system in the world ,especially in our country ,still remains many problems unresolved. With the development of the technology in industry, engineers get fresh ideas on the cooled water system design and operation mode. In terms of economization, it is important to know how to apply these fresh thinking and exert thepotential of the new system.This article is based on the existed HVAC cooled water system, aiming at the design problems encountered during design process, further bringing out a set of optimum system design method by inducing the concept of the LCC(life circle cost) of the water system. According to this method, we can realize overall hydraulic balance without increasing LCC, thus establish the base for high efficiency and economization. The author programs for new design through Microsoft Visual Basic and Microsoft Access, and applies the program successfully to actual system design, and in the end concludes a control strategy adapting the situation of China. The strategy is characterized by adding and meliorating a few of the equipments of the primary pumpsystem, resulting in safe, efficient and economic operation mode, and lighting theworkload at the same time.