Variable temperature difference control of variable frequency circulating pumps in heat supply network

Based on an analysis on the variable flow operation regulation of heating systems, puts forward variable temperature difference control and control scheme. Variable temperature difference control process has positive feedback as well as negative feedback, capable of following the outdoor climatic change. Compares the energy saving performance of variable temperature difference control, constant temperature difference control, constant pressure difference control and variable pressure difference control. The result shows that the energy saving potential of variable temperature difference control is the most notable.