izvorni znanstveni rad
Flooded evaporator is one of the physical ways in which thermal energy can be exchanged between a cooled medium and refrigerated medium, but which is rarely used due to management issues. This paper presents the design of an electronic control unit for controlling the operation of a cooling device based on flooded evaporator technology, and for the purpose of flow cooling juices and beer. Sensor and actuator equipment for control and acquisition of process information is installed on a real laboratory model. The control electronic circuit is designed so that the control of system operation and acquisition of sensor values can be performed via a computer program MATLAB Simulink and parallel via an internal application in the microcontroller. The model is equipped with several various sensors (temperature, pressure, flow) and actuators (fluid solenoid valves, condenser fan, frequency- controlled compressor) and as a result a microcontroller system was developed as a signal interface between the Simulink acquisition card and the physical model. Experimental methods lead to optimal control and regulation algorithms applicable in the later phase of industrial design of the complete device.
electronic circuit, laboratory model, flooded evaporator, beer cooling
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