Refrigerator model Simple model of a domestic refrigerator for connection to ET 915 Features - simple model of a domestic refrigerator for connection to the ET 915 - component operation and fault simulation via the GUNT software Learning objectives/experiments - design and operation of a simple refrigeration system - different expansion elements -- operation with capillary tube -- operation with expansion valve - operating behaviour under load - refrigeration cycle in the log p-h diagram - fault simulation Specification [1] model of a refrigerator to plug onto the base unit ET 915 [2] GUNT training system with HSI technology [3] refrigeration chamber with evaporator, fan and cooling load [4] chamber with transparent front [5] electric heater to generate the cooling load [6] expansion elements selectable via solenoid valves: expansion valve or capillary tube [7] sensors to record temperature and pressure [8] operation of solenoid valves, fan, heater and fault simulation via software [9] GUNT software with control functions and data acquisition via USB under Windows 10 [10] GUNT software: educational software, data acquisition, system operation Technical data Refrigeration chamber, LxWxH: 270x270x220mm Electric PTC heater as cooling load: 210W Capillary tube: length 2m Measuring ranges - temperature: 3x -50...50°C - pressure: -1...9bar LxWxH: 850x380x550mm Weight: approx. 30kg