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Proportional integral derivative control of an oil-heated fractal-like branching microchannel desorber

Creator:

Davis, Keith R.

Abstract:

A PID controller was designed to control the performance of an oil-heated fractal-like branching microchannel desorber for use in an ammonia-absorption refrigeration system. Both the amount and concentration of ammonia refrigerant generated at the desorber can be controlled by choosing the rectified circulation ratio as the controlled variable in a...

Resource Type:

Masters Thesis

Full Text:

dependent on thermal operating conditions [13]. Since cycle COP is maximized when the heat of desorption
An experimental study of ammonia-water bubble absorption in a constrained microscale film

Creator:

Jenks, Jeromy W.

Abstract:

An experimental study of absorption of ammonia into a constrained thin film of ammonia-water solution is presented. A large aspect ratio microchannel with one of its walls formed by a porous material is used to constrain the thickness of the liquid film. Experiments were performed at a pressure of 1,...

Resource Type:

Masters Thesis

Full Text:

transfer coefficient (kg/m 2 -s) s h Solution heat transfer coefficient (W/m 2 K) k Thermal