Thermodynamic Analysis of Energy Cycles : The Enhancement of Efficiency
Dealing with the thermodynamics of the classic energy cycles, this work considers modifications of various power cycles that have the potential to double the efficiency of electric power generation. The book offers a detailed discussion of nonadiabatic behaviour during compression and expansion, which is a topic of central importance in the enhancement of efficiency. Coverage includes practical ways of recouping waste heat from a modified Joule cycle, latent heat recovery, and power and latent heat cycles utilizing compression and expansion along the vapour-pressure or saturation curve of the working fluid. The methodology discussed can be applied directly to geo-thermal and solar energy recovery, and is particularly adapted to skid-mounted units, as used for gas-fired turbine/generators. The evidence presented shows that significant increases in efficiency are still possible in spite of the conventional wisdom about the classic power cycles.
- Hardback | 356 pages
- 167.64 x 241.3 x 25.4mm | 725.74g
- 01 Jul 1996
- Elsevier Science Publishing Co Inc
- Academic Press Inc
- San Diego, United States
Table of contents
Energy relationships: the pressure scale and pressure-volume work; enthalpic energy change and pressure-volume work; internal energy change and pressure-volume work; Joule-Thomson and Gay-Lussac expansions for a perfect gas; the energy balance and frictional effects in fluid flow; flow rate; isentropic behaviour and efficiency; nonadiabatic behaviour; nozzles; discharge co-efficients versus dissipative effects multiphase flow. The conversion between heat and work: isentropic compression and expansion; differential compression and expansion; the Carnot cycle; the Rankine cycle; the Joule cycle; the use and misuse of entropy; other power cycles; heat pump and refrigeration; cycles. Heat engines and the Joule cycle: compression and expansion; generalized cycles; efficiency of the Joule cycle; working fluids; boundary conditions; regenerative cycle; efficiency with two-stage compression; combined cycles; waste-heat recapture; continuous nonadiabatic behaviour during compression and expansion; heat balances. The Joule cycle with nonadiabatic compression and expansion: multistage compression and expansion; nonadiabatic multistage behaviour with constant inlet temperatures; nonadiabatic multistage behaviour with constant interstage heat transfer; nonadiabatic multistage behaviour with variable interstage heat transfer; nonadiabatic multistage behaviour supported by combustion; nonadiabatic multistage behaviour supported by thermal or geothermal sources. Latent heat recovery cycles: latent heat pump; process description; theory; effectiveness; rating (COP); heat transfer; vapour recompression; economics. Compression/expansion in the two-phase region: latent heat change and work. two-phase expansion and compression. Power cycles using the saturation curve - heat pump cycles using the saturation curve: heat pump cycles; heat pump cycles using compression along the saturated vapour curve; latent heat recovery; multiple effect evaporation; symbols.