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ET 850

- Laboratory-scale steam generator for wet or overheated steam
- Characteristic values of a steam boiler
- Various safety and monitoring devices
- Setting up a complete steam power plant in conjunction with the ET 851 steam turbine


Technical Description

A steam generator generates steam which will later be used in drives for steam turbines or for heating. Steam generators and steam consumers together form a steam power plant. Steam power plants work according to the Rankine cycle which is still one of the most important industrially used cyclic processes. Steam power plants are mainly used for electrical power generation.

The ET 850 steam generator and the ET 851 axial steam turbine together form a complete laboratory-scale steam power plant.

The ET 850 trainer serves to familiarise students with the components and principle of operation of a steam generator and enables them to examine the characteristic values of the system. The numerous safety devices of the steam generator can be tested and checked using various monitoring devices.

If the steam generator is operated without the steam turbine, the generated steam is directly liquefied in a condenser and fed back into the evaporation circuit via a tank.

As all components are clearly arranged on the front panel, the cyclic process can be easily monitored and understood. Sensors record the temperature, pressure and flow rate at all relevant points. The measured values can be read on digital displays. At the same time, the measured values can also be transmitted directly to a PC via USB. The data acquisition software is included.

The steam generator has been constructed according to the German "Technische Regeln Dampf" (TRD) (Technical Regulations for Steam), pressure-tested and is equipped with all legally required safety devices.

The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments

- specific characteristic values of a steam boiler
- efficiency of a steam generator
- analysis of the exhaust gases
- influence of different burner settings 
- saturation temperature and pressure of the steam
- steam enthalpy
- determination of the heat flux density and the overall heat transfer coefficient



[1] trainer with gas-powered heater for steam generation
[2] ET 851 steam turbine can be connected to operate a steam power plant
[3] condenser as a thick-walled glass cylinder with water-cooled tube coil and water jet pump for air extraction
[4] closed-circuit feed water supply
[5] sensor for temperature, pressure, flow rate
[6] safety facilities  in accordance with the German TRD for safe operation
[7] exhaust gas analysis with exhaust gas analyser
[8] GUNT software for data acquisition via USB under Windows Vista or Windows 7

Technical Data

- heating power: 8kW

Measuring ranges
- temperature: 0...400°C
- pressure 
condenser: 0...1,6bar abs.
live steam: 0...16bar
- power consumption superheater: 750W
- flow rate
  gas: 0...14L/min
  cooling water: 0...720L/h
  feed water: 0...15L/h

Dimensions and Weight
LxWxH: 1830x790x1770mm (without chimney)
Weight: approx. 280kg Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz, 1 phase
Gas supply (propane): 700g/h, 50mbar
Water connection: 720L/h, 2bar, drain
Ventilation and exhaust gas routing required

Scope of Delivery
1 trainer
1 GUNT software CD + USB cable
1 exhaust gas analyser
1 packing unit of distilled water (20L)
1 set of tools
1 set of instructional material

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