Continue Air Standard Carnot Cycle Answer:Must have work! For an ideal gas,if T=constant,then py constant! p P2 s=const. S=const. P3 3 TH=const. 4 P4 =const. V1 V3 V4 上游通大学 Monday,May 08,2017 6 SHANGHAI JIAO TONG UNIVERSITY
Monday, May 08, 2017 6 Continue Air Standard Carnot Cycle Answer: Must have work! v p 1 2 3 4 p3 p2 p4 p1 TL = const. v2 v1 v3 v4 TH = const. s = const. s = const. For an ideal gas, if T = constant, then pv = constant!
Continue Air Standard Carnot Cycle s=const Physical Devices: s=const. TH=const. TL=const. V2 V1 V3 V4 1 isentropic isothermal isentropic isothermal compression expansion expansion compression QL 2 2 QH 1 1 3 土4 上降文通大学 Monday,May 08,2017 7 SHANGHAI JIAO TONG UNIVERSITY
Monday, May 08, 2017 7 Continue Air Standard Carnot Cycle Physical Devices: 2 3 4 wnet isentropic compression isentropic expansion isothermal compression isothermal expansion 1 1 2 3 2 4 3 4 1 qL qL qH qH v p 1 2 3 4 p3 p2 p4 p1 TL = const. v2 v1 v3 v4 TH = const. s = const. s = const
Internal (ignition)Combustion Engines Spark ignition (SD: combustion initiated by spark air and fuel can be added together Light and lower in cost,used in automobiles Compression ignition (CD: combustion initiated by auto ignition requires fuel injection to control ignition large power,heavy trucks,locomotives,ships 上游通大学 Monday,May 08,2017 8 SHANGHAI JLAO TONG UNIVERSITY
Monday, May 08, 2017 8 Internal (ignition) Combustion Engines Spark ignition (SI): • combustion initiated by spark • air and fuel can be added together • Light and lower in cost, used in automobiles Compression ignition (CI): • combustion initiated by auto ignition • requires fuel injection to control ignition • large power, heavy trucks, locomotives, ships