Thermal Physics III Cooling Processes Refrigerators, air conditioners, and heat pumps are devices that make heat flow from cold to hot. This is called.

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Presentation transcript:

Thermal Physics III Cooling Processes Refrigerators, air conditioners, and heat pumps are devices that make heat flow from cold to hot. This is called the refrigeration process.

Refrigeration versus Heat Engines

These are better known as air conditioners and refrigerators.

Is it possible to cool your kitchen by leaving the refrigerator door open or to cool your room by putting a window air conditioner on the floor by the bed? a. Yes b. No

Refrigerator or air conditioner

The heat pump uses work to make heat from the wintry outdoors flow into the house. An ideal, or Carnot, heat pump is used to heat a house at 294 K. How much work must the pump do to deliver 3350 J of heat into the house on a day when the outdoor temperature is 273 K?

heat pump