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Article | REF: BE9731 V1

Refrigerating machines theory - Mechanical compression machines. Single-stage cycles

Authors: Maxime DUMINIL, Jean-Pierre DOMBLIDES

Publication date: April 10, 2012, Review date: October 16, 2019 | Lire en français

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    6. Thermal power adjustment modes

    The values for the cooling capacity of a refrigeration machine, or the heating capacity of a heat pump, used to calculate and select the required equipment, generally correspond to the machine's maximum thermal load. This is because the system must be able to satisfy cooling or heating requirements under the most difficult conditions. When, under the influence of various factors, these requirements are reduced, the machine's cooling or heating output must be lowered to adapt to the new load conditions.

    We must therefore consider the various methods that can be used to reduce the thermal power produced by these machines. We will confine ourselves here to presenting the principles.

    Examples

    In an air-conditioning system, power requirements decrease as soon as: the outside temperature drops, there is...

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