Thermal Reservoir

Thermal Reservoir:
  • A thermal reservoir is the part of environment which can exchange heat energy with the system.
  • It has sufficiently large capacity and its temperature is not affected by the quantity of heat transferred to or from it.
  • The temperature of heat reservoir remains constant. The changes that do take place in the thermal reservoir as heat enters or leaves are so slow and so small that processes within it are quasistatic.
  • The reservoir at high temperature which supplies heat to the system is called HEAT SOURCE.
  • For example: Boiler Furnace, Combustion Chamber, Nuclear Reactor.
  • The reservoir at low temperature which receives heat from the system is called HEAT SINK.
  • For example: Atmospheric Air. Ocean, River.

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