Electronically Controlled Expansion Valve for Use in a Geothermal Heat Pump System
International Journal of Thermal and Environmental Engineering
This paper presents a detailed design of a development control board that can control an electronic expansion valve in a geothermal heat pump. The design utilized a microcontroller based system with a fuzzy control algorithm, and a temperature and pressure sensor configuration at the inlet of the compressor. The fuzzy control was designed and simulated using Simulink in Matlab. The control algorithm takes the information that the microcontroller obtained from the pressure and temperature sensor and adjusts the valve accordingly to control the amount of superheat. The controller was able to bring the superheat to the desired set point of 10°F ±2°F and maintain it.
Expansion valve, Geothermal, Electronic control, Heat pump
Hosni Abu-Mulaweh, Donald W. Mueller Jr., and Hossein Oloomi (2014).
Electronically Controlled Expansion Valve for Use in a Geothermal Heat Pump System. International Journal of Thermal and Environmental Engineering.7 (1), 1-10.