Showing 1 - 10 of 12
This study reports the results of exergy, economic and environmental analyses of simple and combined heat and power …
Persistent link: https://www.econbiz.de/10011254947
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 …-MHR/RORC has the highest and the GT-MHR/HORC has the lowest exergy destruction cost rate. …
Persistent link: https://www.econbiz.de/10010762598
of exergy is useful in understanding the physical phenomena. The article points out that just after the short …
Persistent link: https://www.econbiz.de/10010675939
conversion processes are explained using exergy, in order to support transport system sustainability. Loss of exergy reflects a … for two reference frames. For an electric train, exergy losses can be related to the energy flows during dynamic processes …, and exergy conversion in these processes provides a meaningful measure of the industrial (<em>i.e.</em>, transportation …
Persistent link: https://www.econbiz.de/10008683005
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 …
Persistent link: https://www.econbiz.de/10008683124
-Roegen (1906–1994) and his advocacy of 'the Entropy Law' as a determinant of economic scarcity. It is argued that exergy is a more …
Persistent link: https://www.econbiz.de/10008683156
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 impact and improving socioeconomic acceptability. The latter...
Persistent link: https://www.econbiz.de/10008683166
exergy methods. It is observed that (1) increasing the compressor pressure ratio raises the air flow rate in the plant but …) increasing the compressor pressure ratio raises the energy and exergy efficiencies, especially at lower pressure ratios; (4 … cycle power slightly. The gas turbine exhibits the highest exergy efficiency of the cycle components and the combustor the …
Persistent link: https://www.econbiz.de/10011147110
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 … ratio of mass of air per mass of steam for the other cycles. The gas turbine exergy efficiency is the highest for the three …
Persistent link: https://www.econbiz.de/10011133879
Heat can be collected from local energy sources and concentrated into a relatively small volume, and at a useful working temperature, by using a heat pump as the concentrator. That heat can be stored and utilized at a later date for applications like space heating. The process is doing two...
Persistent link: https://www.econbiz.de/10011075161