Benchtop heat pump model
Entry-level model: Understanding the heat pump

Evaporation, compression, condensation and expansion
Item No.: 101961

The benchtop model conveys the functional principle of a heat pump in an easy and understandable way. It illustrates the different stations of the refrigeration cycle that are crucial for the smooth functioning of a heat pump: Evaporation, compression, condensation and expansion. With the help of this model, these central phases can be understood in a simple way.


After the tanks have been filled with tap water and the model has been connected electrically (via Schuko plug for conventional 230V socket), the heat pump is ready for operation and the trainees as well as the pupils can get to know how a heat pump works. The compact design of the model in conjunction with the didactic materials provided enables flexible use both in theory and in practice.

The parameters temperature and pressure, which are important for the operation of a heat pump, are recorded and displayed using modern measuring technology. The measured values can then be traced, processed and evaluated by the trainees or students using the didactic materials. In this way, a deeper understanding of the processes in the refrigeration cycle and of heat pump technology as a whole is gained.

Thanks to its compact dimensions and robust frame, the model is extremely versatile. This helps to make understanding of heat pump technology easy and training more effective overall. The flexible use of the model makes it possible to structure training in a more efficient way.

Technology and environment

It is particularly important for trainees or apprentices to be familiar with how heat pumps work, as this technology has a huge impact on the energy efficiency, sustainability and environmental friendliness of heating and cooling systems. Climate targets can only be met with environmentally friendly technology. Decarbonisation in heating technology plays a very crucial role in this. Therefore, the heat pump is the building heating of the future! Thus, it is particularly important to teach this technology comprehensively in education and training.

First of all, it is crucial to understand the functional principle of a heat pump. Only when the relevant components and their function, as well as the complete process in the heat pump, are understood, will one be able to plan, set up, commission and maintain heat pump systems.


The optimal combination of theory and practice is essential for a sound understanding of heat pumps. On the one hand, the theoretically learned basics can be reproduced experimentally, and on the other hand, the results and measurements of the practical exercises and experiments can decisively promote the understanding of heat pump technology.

  • Understanding the functional principle of a heat pump
  • Getting to know the main components of a heat pump and their function
  • Operating conditions of a heat pump heating system
  • W x D x H = approx. 86 x 58 x 92 cm
  • Weight: approx. 40 kg Table model each without water filling in the containers
  • Electrical connection: 230V Schuko plug

Table model heat pump, consisting of:

  • Spiral heat exchanger as evaporator
  • Compressor
  • Spiral heat exchanger as condenser
  • Expansion valve
  • Pressure gauge for displaying the pressure on the low-pressure side and on the high-pressure side
  • Pressure switch on the high pressure side
  • Two transparent vessels to hold the two heat exchangers
  • Two thermometers for recording the temperatures in the two vessels
  • Four thermometers for recording the temperatures in the refrigeration circuit, at:
  • Evaporator inlet and outlet
  • Condenser inlet and outlet
  • Refrigerant R134a
  • Training as a plant mechanic SHK
  • Further training in heat pump technology
  • Further training in renewable energies

Learning fields:

  • Plant mechanic SHK 9, 12, 14, 15

The mobile base (art. no. 104060) is available separately and is not included in the scope of delivery.


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