Investigation of subcooling in receivers




Greater Copenhagen area

The amount of refrigerant charge needed in a heat pump or refrigeration system varies with the load and working conditions of the system. In order to make systems flexible, receivers are used to store excess refrigerant. This receiver is typically placed after the condenser, such that it is fed with liquid from the condenser.

When modelling a heat pump or refrigeration system it is usually assumed that the state of the refrigerant is saturated out of the receiver, since both liquid and vapour are present in the receiver. However this also assumes thermodynamic equilibrium.

MSK (Maskinmesterskolen København) has a test facility equipped with temperature and pressure sensors in the receiver as well as sight glasses for visual inspections. Preliminary measurements show that subcooled refrigerant can exit the receiver. The hypothesis is that thermodynamic equilibrium is not attained in the receiver.

The project aims at investigating the subcooling in the condenser and receiver by modelling and experimental investigations.

For more information please contact Wiebke Brix Markussen (

According to the personal preferences of the candidate, topic and extend of the work can be adjusted.


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