Automatic proportional integral derivative control techniques are applied in a single-stage solar absorption cooling system, showing 3.8 kW (~1 ton) capacity, with coefficient of performance 0.6 and ?4.1 °C evaporator temperature. It is built plate heat exchangers as main components, using ammonia–water the working mixture fluid collectors source hot water. Control tuning was verified dynamical...

control of well drilling operations poses a challenging issue to be tackled. the loss of well control could lead to the occurrence of blowout as a severe threat, involving the risk of human lives and environmental and economic consequences. conventional proportional-integral (pi) controller is a common practice in the well control operation. the small existing margin between pore pressure and f...

in this paper, we try to use modeling based on singular perturbation theory, in order to control satellite attitude during the wide rolling angle maneuvering through nonlinear h∞ control strategy. differential equations describing dynamics of the satellite are presented first, and by choosing the appropriate dynamic model for actuators and based on the standard singular perturbation model, the ...

Abstract A common requirement for turbomachinery testing facilities is the ability to independently control Mach number and Reynolds number. In practice, this means independent of inlet total pressure exit static in a test facility. paper, we present solution problem with particular applicability large-scale annular facilities. We describe design commissioning combined dump diffuser deswirl sys...

In a cascade hydroponic system, the used nutrient solution drained from primary crop is directed to secondary crop, enhancing resource-use efficiency while minimizing waste. Nevertheless, inevitably increased EC of drainage requires salinity-tolerant crops. The present study explored salinity-tolerance thresholds basil evaluate its potential use as in system. Two distinct but complemented appro...