Efficiency of variable frequency circulating pump in heating system

Based on experimental data in the relevant literature, draws the comprehensive electromechanical constant efficiency curves of variable frequency pump under different conditions, and finds the large deviation between the theoretical constant efficiency curves based on the similarity law and the comprehensive electromechanical constant efficiency curves. Combined with practical engineering test, provides the comprehensive electromechanical constant efficiency curves of variable frequency pump, and finds out the effective operation range. Verifies that the variable frequency technique can play a great energy-saving effect based on the reasonable selection of pumps.