In a refrigeration system, heat is rejected by which process?

In a refrigeration system, heat rejection occurs during the process of latent heat of condensation. When refrigerant vapor is condensed into liquid form within the condenser, it releases heat to the environment. This is an essential step in the refrigeration cycle, allowing the system to maintain low temperatures inside the refrigerated space.

During condensation, the refrigerant transitions from a gaseous state to a liquid state while expelling the energy it absorbed earlier when it evaporated. This process not only helps in removing heat from the refrigerated area but also maintains the flow of the refrigeration cycle by allowing the refrigerant to continue to circulate.

The other processes listed are related to different phase changes: the latent heat of vaporization refers to the heat absorbed when a liquid becomes a gas (which occurs during the evaporator phase), the latent heat of fusion relates to the change from solid to liquid, and the latent heat of sublimation pertains to the direct transition from solid to gas. None of these processes involve the rejection of heat in the context of the refrigeration cycle as effectively as condensation does.