relative density

Absolute humidity

Temperature of flowing liquids

Relative humidity and pressure of air

60 km/hr

45 km/hr

80 km/ hr

26 km/hr

Removes heat from a low temperature body and delivers it to a high temperature body

Removes heat from a high temperature body and delivers it to a low temperature body

Generates work out put between high and low temperature

Do not provide any energy exchanger

Wet bulb temperature

Dry bulb temperature

Dew point temperature

Saturation temperature

Vapour compression

Vapour absorption

Carnot cycle

Electrolux refrigerator