課程名稱︰熱力學
課程性質︰必修
課程教師︰許文翰
開課學院：工學院
開課系所︰工科海洋系
考試日期（年月日）︰2009/06/18
考試時限（分鐘）：90分鐘
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
1. The compression ratio in an air-standard otto cycle is 10. At
the begining of the compression stoke,the pressure is 0.1MPa and
the temperature is 15。C. The heat transfer to the air per cycle
is 1800 KJ/Kg air. Determine (1) The pressure and temperature at
the end of each process of the cycle；(2) The thermal efficiency
﹔(3)the mean effective pressure.(20%)
2. An air-standard diesel cycle has a compression ratio of 20 and
the heat transferred to the working fluid per cycle is 1800 KJ/Kg
.At the begining of the compressure procer the pressure is 0.1Mpa
and the temperature is 15。C. Determine (1) The pressure and temp
-erature at each point in the cycle (2)The thermal efficiency (3)
The mean effective pressure.(20%)
3. In an air-standard Brayton cycle, the air enters the compressor
at 0.1 MPa and 15。C. The pressure leaving the compressor is 1 Mpa
and The maximan temperature in the cycle is 1100。C. Determine (1)
The pressure andtemperature at each point in the cycle.(2)The comp
-ressor work、turbine work.(3)Cycle efficiency.(20%)
4. Calculate the change of entropy of 3Kg of air that changes state
from 300K and 100KPa to 800K and 500KPa. (20%)
5. A compressor seceires 0.75 m^3/s of air at 290K and 101KPa. The
compressor discharges the air at 707 KPa and 435K. The heat transf
-er from the control volume is determined to be 2.1KW .Determine
the power required to drive the compressor.(20%)
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