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ET 915.06

- Model of a simple air conditioning system for room cooling
- Component operation and fault simulation via the GUNT software


Technical Description

ET 915.06 is part of the HSI training system for refrigeration and air conditioning technology. In combination with the base unit ET 915 the operational model of a simple air conditioning system is created. The model is plugged onto the base unit, secured using fasteners and connected with refrigerant hoses to become a complete refrigeration circuit for the air cooler.  

In systems for room cooling the air to be cooled is aspirated from the room by a fan, cooled and fed back into the room. This model demonstrates the principles of room cooling and the components of an air conditioning system.

The model ET 915.06 includes an air duct with transparent front, fan for air transport, an evaporator as air cooler and an expansion valve. All components are clearly arranged on a panel.

The individual components of the system, here the compressor and the fan, are operated via the software. The software offers the option to simulate faults.

The volumetric air flow rate is determined via a differential pressure measurement. Temperatures before and after the evaporator are recorded by sensors, digitised and dynamically represented in the software.

Fundamentals and individual components are represented in the educational software for ET 915.06. Performance assessments check the learning progress. With the aid of the authoring system further exercises and performance assessments can be created.

Learning Objectives / Experiments

- air conditioning system for room cooling and its main components
- principle of operation of an evaporator as air cooler
- fault simulation


[1] model of a simple air conditioning system to plug onto the base unit ET 915
[2] GUNT training system with HSI technology
[3] air duct with transparent front
[4] evaporator as air cooler
[5] radial fan with throttle valve
[6] thermostatic expansion valve as expansion element
[7] sensors to record temperature and differential pressure for determining the volumetric air flow rate
[8] operation of individual components and of the system and fault simulation via software
[9] GUNT software: educational software, data acquisition, system operation 
[10] GUNT software for data acquisition via USB under Windows Vista or Windows 7

Technical Data
Air duct: 136x136x435mm
Evaporator as air cooler
- transfer area: approx. 900cm²
Radial fan 
- max. power consumption: 80W
- max. flow rate: 255m³/h
Measuring ranges
- temperature: 2x -50...50°C,  2x 0...100°C
- differential pressure: 0...10mbar  

Dimensions and Weight
LxWxH: 970x370x600mm
Weight: approx. 35kg

Scope of Delivery
1 model of a simple air conditioning system, filled with refrigerant
1 GUNT software CD + USB cable

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