Food Engineering
Wet bulb temperature
The temperature reached by a wetted surface in a moving air stream at steady state, where evaporative cooling balances heat gain from the air.
Used in food drying and cold storage design to understand how effectively air can cool or dry a product through evaporation.
Related terms
Psychrometric chart
Food EngineeringA chart relating dry bulb temperature, wet bulb temperature, humidity ratio, relative humidity and enthalpy of moist air.
Spray drying
Food EngineeringAtomising a liquid feed into a hot air stream so droplets dry almost instantly into powder.
Constant rate period
Food EngineeringThe first stage of drying, in which free surface water evaporates at a steady rate and the surface stays at the wet bulb temperature.
Know the terms? Put them to the test.
Definitions only get you so far. The free General Aptitude test shows you how you handle the real thing under a clock.
Start the free test