区域供冷大口径电动调节阀的选型及控制方法研究
Selection and control method of large caliber electric control valves for district cooling
摘要：
在区域供冷系统中,管道尺寸及系统流量较大,传统暖通空调领域常用的电动调节阀由于口径过小,无法满足其调节需求。针对此问题,提出了使用蝶阀作为调节阀来解决。对区域供冷系统中大口径调节阀的使用位置及作用进行了说明,介绍了蝶阀的调节特性及选型计算方法;针对区域供冷系统流量调节范围大、单个蝶阀无法满足所有工况调节需求的问题,提出了通过并联蝶阀的解决方法,并进行了理论分析,介绍了阀门的分程控制方法;结合实际工程,介绍了大口径蝶阀的选型方法。
Abstract：
In district cooling systems, the pipe size and system flow rate are relatively large, and the electric control valves commonly used in the traditional HVAC field cannot meet the regulation requirements due to their small diameter. To solve this problem, the use of butterfly valves as regulating valves is proposed. This paper describes the use position and function of large caliber control valves in district cooling systems, presents the adjustment characteristics and selection calculation method of butterfly valves. Aiming at the problem that the flow regulation range of district cooling system is large and a single butterfly valve cannot meet the adjustment requirements of all working conditions, a solution through parallel butterfly valves is proposed and a theoretical analysis is carried out, and the part-range control method of the valves is presented. Combined with an actual engineering, the selection method of large caliber butterfly valves is presented.
Keywords:district cooling; large caliber electric control valve; butterfly valve; adjustment characteristic; selection; control method