Solution to overpressure problem of terminal heating equipment in direct supply systems with low temperature heat source

Discusses the solution to the overpressure of users heating terminal equipment in the direct supply system with low temperature heat source. Taking a residential building heating project with total heating area of 330 000 m2 as an example, analyses the working pressure changes of the users heating system under different hydraulic transportation systems and water replenishing and pressure fixing systems. Finally, applies the three-stage pump delivery system with the user pump installed in return water pipeline and the highly accurate controlled pump pressure fixing device to solve the overpressure problem in low temperature floor radiant heating systems. This solution can be used as a reference for the similar system with low temperature heat source.