The overall pressure drop and the vertical static pressure profile in a 0.14‐m. diameter mobile‐bed contactor have been investigated for two packing sizes and three packing heights. The gas and liquid flow rates were the two other variables studied. Foam polystyrene spheres were used as packings.
The relationship between the static pressure and vertical position of the bed was found to be linear. A correlation of the drag parameter with Gg, Gt and Lp is presented. States of fully‐mobile bed operation are discussed.
A validated model of a liquid chilling plant has been adapted for an investigation into the control of multiple liquid chilling plants incorporating reciprocating compressors. Problems of set point accuracy, system stability and energy efficiency are analysed and a new intelligent controller has been developed. The controller has three sequencing schedules and is superior to PID systems considering first safety, then set point accuracy and finally energy efficiency; however, further development work is required.
The capital and annual energy consumption costs of an air conditioning system were evaluated to assess the economic application of variable compressor speed for refrigeration system capacity control. This system was compared with two other capacity control systems, hot gas bypass and cylinder unloading, for both continuous and intermittent operation. It was concluded that variable compressor speed control is only economically viable when used for continuous operation.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.