Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
645345 | Applied Thermal Engineering | 2015 | 11 Pages |
Abstract
This paper considers superheat control of a vapor compression cooling cycle. Earlier research presented a hybrid expansion valve (HEV) that combines fast-acting mechanical pressure control with a slower electronic controller to regulate superheat, providing significant improvements in superheat control over standard valves. This paper shows that these improvements can be recreated with a simpler implementation of purely electronic control and a single expansion valve actuator. Simulations explore the actuator requirements, and experiments using a commercially available thermally-actuated MEMS valve show that the control architecture is suitable for both single and multiple evaporator systems, provided the actuator is fast enough.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Matthew Elliott, Bryan P. Rasmussen,