stručni rad
Individual quick freezing process is a complex cooling process that takes place in cooling tunnels and is used for dynamic thermal processing of certain type of goods. Type of goods and temperature of goods that needs to be achieved over specific time in cooling tunnel determine the complexity of cooling process. Complex cooling process is therefore divided into two types of regulation. Temperature regulation, the inferior type, is used for control of the cooling and defrosting parts of the system according to predefined room temperature. Superior time-cycle regulation is used to control various cycles of operation by defining its time frames. These cycles together form a period of time in which the cooling system is appropriately used for goods' freezing. This paper describes further development in automation control design for complex cooling process in cooling tunnels. This design includes selection of appropriate control devices (temperature/pressure regulators, PLC device, HMI/SCADA), definition of LADDER program solution for dynamic time-cycle control, connection and configuration of HMI/SCADA system used for defining the number/duration of time cycles of cooling and defrosting operations and monitoring the system conditions.
Individual Quick Freezing; Automation Control; PLC; SCADA
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