Showing 171 - 180 of 15,002
Both thermoeconomic accounting and emergy analysis methodologies deal with energy systems and are aimed at allocating … focuses on energy systems converting the energy of fuel/s into the desired product/s. The latter amplifies the perspective by …, either devices or material and energy flows. …
Persistent link: https://www.econbiz.de/10010810142
Possibly one of the most significant advantages that hydrogen may have as a fuel is its potential for increased second-law efficiency, due to fundamental differences in the mechanism of entropy generation during combustion with respect to the usual hydrocarbon-based fuels. A computational...
Persistent link: https://www.econbiz.de/10010810171
zone combustion model is developed to simulate the natural gas fueled HCCI engine. Also, the performance of AWCC is … both the AWCC and the tri-generation system are investigated in detail. The cycle performance is then optimized for the … fuel energy saving ratio (FESR). The enhancement in the FESR could be up to 28.56%. Under optimized condition, the second …
Persistent link: https://www.econbiz.de/10010810380
based power generation systems. Exergy analysis is performed based on the first and second laws of thermodynamics for power … generation systems. The results show the exergy analyses for a steam cycle system predict the plant efficiency more precisely … for increasing the net power output and efficiency. To evaluate the energy utilization, one combined cycle unit and one …
Persistent link: https://www.econbiz.de/10010810443
The exergy method is used to compare different production processes and various methods for emission abatement with … exergy input and cumulative exergy consumption …
Persistent link: https://www.econbiz.de/10010810469
flow of cumulative exergy in the 488-sector benchmark economic input–output model in two different ways. Industrial … cumulative exergy consumption (ICEC) captures the exergy of all natural resources consumed directly and indirectly by each … economic sector, while ecological cumulative exergy consumption (ECEC) also accounts for the exergy consumed in ecological …
Persistent link: https://www.econbiz.de/10010810495
of three cycles. Using the first and second laws of thermodynamics, theoretical analyses on the performance … characteristics of the cycles are carried out. Also a parametric study is conducted to optimize the performance of each cycle under … various operating conditions. The proposed cycles exhibit a reasonable value of COP (coefficient of performance) with a much …
Persistent link: https://www.econbiz.de/10010811012
This paper makes an assessment of the exergy loss of the main minerals produced in the world throughout the 21st … century, namely coal, oil, natural gas, iron, aluminium and copper. The reason for using the exergy analysis as an assessment …, composition and quantity. Furthermore, using the same unit of measurement (energy) means all minerals considered can be compared …
Persistent link: https://www.econbiz.de/10010811088
analyse where and why the losses in the process occur. Therefore a structured exergy analysis of an IGCC with carbon capture …
Persistent link: https://www.econbiz.de/10010811116
A numerical simulation of a plate contact-type isothermal heat pump dryer (HPD) is used to examine the energy … detailed plate, product and air flow model, solving the mass, momentum and energy balances within the drier, into a pre … to lead to significant error when it is integrated into the whole-system HPD model. The energy efficiency benefit …
Persistent link: https://www.econbiz.de/10010811155