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 TL=const. V2 V1 VA V3 V 上游充通大率 May15,2018 6 SHANGHAI BAO TONG LINIERSITY
May 15, 2018 6 Continue Air Standard Carnot Cycle Answer: Must have work! v p 1 2 3 4 p 3 p 2 p 4 p 1 TL = const. v 2 v 1 v 3 v 4 TH = const. s = const. s = const. For an ideal gas, if T = constant, then pv = constant!
Continue Air Standard Carnot Cycle S=const ④Physical Devices:: s =const Tu=const. T=const V2 V1 V3 V4 net 1 isentropic isothermal isentropic isothermal compression expansion expansion compression AL 2 2 AH 人●2 1 上游充通大率 May15,2018 7 SHANGHA BAO TONG LINIERSITY
May 15, 2018 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 q L q L q H q H 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 上游充通大率 May15,2018 8 SHANGHAI BAO TONG LINIERSITY
May 15, 2018 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