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    Excerpt: Guide – Heat pump knowledge in 4 modules

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    Module 3: Correctly plan and measure heat pumps.

    Heat pumps are industrially prefabricated in large quantities. The refrigerant circuit is then already pre-installed in a monobloc – whether for indoor or outdoor installation. In the case of split units, the expert technician must close the refrigerant circuit. The next task is to properly connect the heat pump to the thermal storage tanks or the distribution network in the building and to the heat source. No mistakes must be made here, because this will inevitably have a negative impact on the seasonal performance factor and thus the overall efficiency of the heating system. The final step is commissioning.

    1. Planning heat pump systems

    However, everyday practice often demands even more from a specialist company. In contrast to combustion technology with energy sources such as oil, gas, wood or pellets, each degree Celsius in the thermodynamic cycle of a heat pump by and large plays a major role in the use of electrical energy. For example, 1 K higher evaporation temperature on the heat source side or 1 K lower condensation temperature at the heat sink bring about a 2 to 3 percent improvement in the COP of the heat pump. Expert knowledge is therefore required.

    The planning of heat pump systems includes preliminary investigation, conceptual development and detailed planning. This should include hydraulic circuits, dimensioning of system components, documentation, commissioning of the system, instruction of the operator and also cost considerations.

    2. Practical knowledge for work in the field

    Exact measuring values and expert knowledge form the basis for comprehensive system evaluation and correct adjustment of the refrigerant circuit of a closed split heat pump. This is the only way to record and evaluate crucial operating conditions or parameters.

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