可变流量以适应施加在循环加热和冷却系统上的可变热负荷，是设计师可用的两个选项之一。另一个是可变温度范围。在这两种选择中，可变温度范围历来是首选方法。本文探讨了变流量概念在变温度范围内的优势，其中一些优势包括更简单、控制稳定性和改进的能源经济性。本文对广泛使用变温的原因进行了透视，并探讨了改变这种趋势的情景。引文:研讨会，ASHRAE交易，1985年，第91卷，pt。1B芝加哥

Variable flow rates to accommodate variable thermal loads imposed upon hydronic heating and cooling systems are one of two options available to designers. The other is variable temperature ranges. Of the two options, variable temperature ranges have historically been the preferred method. This paper explores the advantages of the variable flow concept over variable temperature range, some of which include greater simplicity, control stability, and improved energy economics. The reasons for the wider use of variable temperatures are put in perspective, and scenarios for changing the trend are explored.