Refrigeration Cycle

a refrigeration system removes thermal energy from a low-temperature region and transfers heat to a high-temperature region.
• the 1st law of thermodynamics tells us that heat flow occurs from a hot source to a cooler sink, therefore, energy in the form of work must be added to the process to get heat to flow from a low temperature region to a hot temperature region.
• refrigeration cycles may be classified as
– vapour compression
– gas compression
• we will examine only the vapour compression systems
• refrigerators and heat pumps have a great deal in common. The primary difference is in the manner in which heat is utilized.
Refrigeration Cycle
The Ideal Vapor-Compression Refrigeration Cycle
New Refrigeration Cycle To Improve 100-Year-Old Technology
Ejector Refrigeration Cycle