) increasing the compressor pressure ratio raises the energy and exergy efficiencies, especially at lower pressure ratios; (4 …Biomass energy and especially biofuels produced by biomass gasification are clean and renewable options for power … plants. Also, on hot days the performance of gas turbines decreases substantially, a problem that can be mitigated by fog …

-Roegen (1906–1994) and his advocacy of 'the Entropy Law' as a determinant of economic scarcity. It is argued that exergy is a more … behaviour of energy and matter are not equally mirrored by thermodynamic laws. Thermodynamic insights as typically employed in …

Many factors to be appropriately addressed in moving towards energy sustainability are examined. These include … harnessing sustainable energy sources, utilizing sustainable energy carriers, increasing efficiency, reducing environmental … with the approach put forward, and options for energy sustainability and the broader objective of sustainability. Energy …

In the present work, the results are reported of the energy and exergy analyses of three biomass-related processes for … energy and exergy efficiencies are maximized for the three configurations at particular values of compressor pressure ratios … dual-fuel combined cycle, and the biomass gasification integrated post-firing combined cycle. The energy efficiency for the …

This study reports the results of exergy, economic and environmental analyses of simple and combined heat and power …

for two reference frames. For an electric train, exergy losses can be related to the energy flows during dynamic processes …The paper illustrates some aspects of energy conversion processes during underground electric train operation. Energy … conversion processes are explained using exergy, in order to support transport system sustainability. Loss of exergy reflects a …

Exergy is a thermodynamic concept that has been widely promoted for assessing and improving sustainability, notably in … the characterization of resources and wastes. Despite having many notable benefits, exergy is often misused by authors who … both theoretical and empirical evidence the authors present five key limitations that must be overcome before exergy can be …

cycle (RORC). Exergoeconomic analyses are performed with the specific exergy costing (SPECO) method. First, energy and … exergy analyses are applied to the combined cycles. Then, a cost-balance, as well as auxiliary equations are developed for … the effects on the exergoeconomic performance of the combined cycles of various significant parameters, e.g., turbine …

Heat can be collected from local energy sources and concentrated into a relatively small volume, and at a useful …. The heat pump maintains the temperature of the periphery at the ambient ground temperature so very little energy is lost …

the application of Extended Exergy Accounting (EEA) to the quantification of such externalities. The exergy flow diagrams … good or service, and it is shown to provide a wealth of quantitative information to energy managers and planners. …