A heat engine receives heat from a source at 1727oC at a rat

A heat engine receives heat from a source at 1727^oC at a rate of 500 kW and rejects the waste heat to the atmosphere at 27^oC. The net output from the engine is 300 kW. Determine:

a. The reversible power output

b. The rate of exergy flux into the engine

c. The rate of irreversibility (exergy destruction) in the universe

d. The second-law (exergy) efficiency of the engine

T1= 1727+273= 2000 K

T2 = 27+273= 300 K

CARNOT EFFICIENCY= 1-(300/2000)= 0.85

CARNOT EFFICIENCY= W/Q1=0.85

W/500= 0.85

SOLVING a) REVERSIBLE POWER OUTPUT= W= 425 KW

B) RATE OF EXERGY FLUX= 500 KW

C) RATE OF EXERGY DESTRUCTION= 425-300= 125 KW

D) CYCLE EFFICIENCY= 300/500= 0.60

SECOND LAW EFFICIENCY= 0.60/0.85= 0.70588

A heat engine receives heat from a source at 1727oC at a rate of 500 kW and rejects the waste heat to the atmosphere at 27oC. The net output from the engine is

A heat engine receives heat from a source at 1727oC at a rat

Solution

Get Help Now

Submit a Take Down Notice