文档介绍：© American Standard Inc. 1999
period one Heat and Refrigeration
Refrigeration Cycle
Air Conditioning Clinic TRG-TRC003-EN
What is Refrigeration?
Refrigeration is the process of removing heat from one substance and transferring it to another substance.
What is Heat?
Heat is a form of energy
Quantity and Intensity
Quantity and Intensity
110°F
[°C]
60°F
[°C]
Measuring Heat Quantity
60°F
61°F
15°C
16°C
1 Btu
1 kcal
1 lb
water
1 kg
water
Principles of Heat Transfer
Heat energy cannot be destroyed
Heat always flows from a higher temperature substance to a lower temperature substance
Heat can be transferred from one substance to another
Heat Energy Cannot Be Destroyed
Heat Flows from Hot to Cold
Methods of Heat Transfer
radiation
hot
water
conduction
convection
cool air
warm air