According to the characteristics of low-temperature waste heat power generation system

the degree of superheat directly affects the heat transfer efficiency of the evaporator

and it is concluded that the superheat degree of the evaporator can be controlled by controlling the speed of the centrifugal pump motor to ensure the heat transfer efficiency of the evaporator. According to the analysis

the model based on centrifugal pump and working fluid is established

and the fuzzy PID controller is designed and simulated. The simulation results show that the fuzzy PID controller has the advantages of fast response speed

small overshoot

Short process time

good stability and robustness. Under the action of the fuzzy PID controller

the low temperature waste heat power generation system runs more smoothly.