
Second Law of Thermodynamics
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Safiah razak
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7 Slides • 0 Questions
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Second Law of Thermodynamics
Heat Engine & Reversed Heat Engine
2
What is 2nd Law of Thermodynamics??
"Although the nett heat supply in cycle is equal to the nett work done, gross heat supply mst be always greater than work done"
3
Thermal Energy Reservoir
Heat sink:Reservoir that absorbs heat
Heat source:Reservoir that supllies heat
4
Heat engine
device that uses heat to perform work
application example: power plant, gas turbine, locomotive engine, steam engine
5
Reversed Heat Engine
Device that make heat flows from cold to hot
application example: refrigeration, air conditioning, heat pump
6
The difference between heat pump and air conditioning
or refrigerator
Desire output for heat pump is QH
Desire output for air conditioning/refrigerator is QL
7
How to measure performance for heat engine and heat pump??
heat engine: efficiency
reversed heat engine: coefficient of performance
Second Law of Thermodynamics
Heat Engine & Reversed Heat Engine
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