Method and installation for controlling the amount of heat taken from district heating appropriate to the actual need of a domestic distribution point

摘要

A method for controlling a district heating system which provides optimum heat transfer for each user without lowering the temperature of the water circuit unduly. The process control (2) monitors the ambient temperature and the supply and return feed temperatures and progressively adjusts the control valves (7, 10, 11) in a control algorithm to approach the optimum settings without lowering the circuit temperature to levels which favor Legionnaire's Disease. The adjustment is in steps with time delay monitoring of the results.