Analysis and solution for reverse flow in secondary pump system

Reverse flow is a common issue in secondary pump system, which may lead to the increase of supply water temperature in secondary loop, decrease of the refrigerating capacity of terminal devices, and increase of electricity consumption of pumps. Simulates the forming and developing process of reverse flow by a simulation tool, and discusses the conditions with which reverse flow could occur and the influence of chilled water pumps control and terminal devices regulating. Points out that the inadequate refrigerating effect is the primary cause for reverse flow, and gives solutions.