TESS - Training and Experimental System for Students

Current-voltage characteristic of the wind wheel

Principle

This experiment can also be carried keeping the distance constant but changing the number of rotor vanes. In the following example, the performance dependence on the voltage is examined using all 6 rotor vanes but different distances (5 cm and 10 cm) ...

Generation of hydrogen and oxygen using a PEM electrolyser

Principle

The PEM electrolyser consists of a thin, proton-conducting polymer electrolyte membrane (PEM), the two sides of which are each coated with a catalysing material. These coatings form the anode and the cathode. The theoretical decomposition voltage of w ...

Generation of electric energy using a PEM fuel cell

Principle

All fuel cells fundamentally consist of two electrodes (cathode and anode) and an electrolyte which separates the two electrodes from each other. The mode of operation corresponds to a reversed electrolysis. Fuel cells are classified according to the ...

Solar-hydrogen system

Principle

Whereas coal, natural gas and crude oil sources will be exhausted in the not too distant future, the sun is expected to continue to exist in the form known to us for about 5 billion years. Solar energy can be utilised, but is not always available whe ...

Wind-hydrogen system

Principle

Similarly to solar energy, wind energy is a regenerative form of energy. It differs in that it has been used by man for centuries, for example, in windmills, in which it is converted to mechanical energy. In recent times, wind power plants have been b ...

Characteristic curve of a PEM electrolyser

Principle

The PEM electrolyser consists of a thin, proton-conducting, polymer electrolyte membrane (PEM). The two sides of this are each coated with a catalysing material and act as anode and cathode. The theoretical decomposition voltage of water is 1.23 V, bu ...

Faradic efficiency and energetic efficiency of a PEM electrolyser

Principle

The efficiency of an electrolyser is an indicator of the efficiency of energy conversion. A differentiation is made here between energetic and faradic efficiencies.

When a new technology is developed, it is important that it can be economica ...

Current-voltage characteristic of a PEM fuel cell

Principle

The performance curve of a PEM fuel cell is not linear, but reaches a maximum performance at a certain current. When fuel cells are used in practice, it is important that they are operated with the current at which the fuel cell brings the most power. ...

Faradic and energetic efficiencies of a PEM fuel cell

Principle

The efficiency of a fuel cell is an indicator of the efficiency of the energy conversion, whereby a differentiation is made between two efficiency types, the energetic efficiency and the faradic efficiency. 

The recovery of electric ene ...

The efficiency of a electrolyser-fuel cell system

Principle

The use of hydrogen and oxygen for energy storage only makes sense when it functions with the lowest possible losses.

In this experiment, an examination is to be made on the efficiency of an electrolyser - fuel cell system and consequently o ...

current-voltage characteristic of an air breathing fuel cell

Principle

The decisive element for the operation of a fuel cell is hydrogen. High concentrations of this are required for combustion in the fuel cell.

In this experiment, the current-voltage characteristic of an airbreathing fuel cell is examined, whe ...

Generation of electrical energy using a thermogenerator(thermoelectric power)

Principle

The Peltier element (thermal generator) is made of many thermo elements. These are switched on electrically in series and thermally parallel, so that their thermoelectric voltages are added together. This experiment demonstrates that a thermo generato ...

Thermal voltage and temperature

Principle

In this experiment the temperature difference is generated by a metal beaker containing hot water which stands on the upper plate of the thermo element. The temperature difference changes when the hot water is cooled down.

Task

Peltier effect: cooling engine

Principle

In this experiment, the shown effect in experiment 7.1 is inverted. Instead of converting heat into electric energy with the help of the thermo generator, we prove here the Peltier effect. The effect is that the current flowing through the Peltier ele ...

Peltier effect: heat pump

Principle

A heat pump is a device which uses mechanical or electric energy to pump thermal energy from a medium A into a medium B. The heat Q conducted to the medium B is greater than the used mechanical or electric energy E₀. The Q factor (performan ...