« Back
E2V & PWM: comparison between proportional and pulse width modulating expansion valves
11/02/2011
E2V & PWM: comparison between proportional and pulse width modulating expansion valves
Expansion valves are used in commercial refrigeration to supply the evaporators on showcases and in cold rooms.
The task of the expansion device is to guarantee correct superheat at the evaporator outlet.
It's easy to understand how better control precision can bring advantages in terms of energy saving, control quality and stability/safety of the entire refrigerant circuit.
To demonstrate such assumption with scientific rigour, CAREL has brought together a series of data and observations to help understand the true positive effects of proportional control compared to pulse width modulating.
This document reports the results measured in our laboratories, on real working installations and with the help of tests conducted independently by third party organisations.
+4000009EN
The task of the expansion device is to guarantee correct superheat at the evaporator outlet.
It's easy to understand how better control precision can bring advantages in terms of energy saving, control quality and stability/safety of the entire refrigerant circuit.
To demonstrate such assumption with scientific rigour, CAREL has brought together a series of data and observations to help understand the true positive effects of proportional control compared to pulse width modulating.
This document reports the results measured in our laboratories, on real working installations and with the help of tests conducted independently by third party organisations.
+4000009EN
