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Exergy destruction in adiabatic pipeline flow of surfactant-stabilized oil-in-water emulsions is investigated in five … exergy destruction rate per unit pipe length increases linearly with the increase in the Reynolds number on a log-log scale … in both laminar and turbulent regimes. However the slope in the turbulent regime is higher. The exergy destruction rate …
Persistent link: https://www.econbiz.de/10011075167
The second law of thermodynamics and, specifically, exergy analysis have been traditionally used for the assessment and … optimization of energy systems. Nevertheless, as shown in this paper, exergy could also constitute a powerful tool for the … evaluation of mineral commodities. That said, new or re-defined exergy-based concepts need to be developed. This paper presents …
Persistent link: https://www.econbiz.de/10011133882
) turbogenerator. An exergy analysis is performed to identify the sources of inefficiencies, the optimal design variables, and the most …
Persistent link: https://www.econbiz.de/10011096854
Lowering the exergy content of heat required for heating purposes decreases the primary energy consumption. District … heating systems are often an important link between facilities that generate heat with low exergy content and consumers … methodology for an exergy-based distribution-network analysis in a district heating system. Criteria for performance evaluations …
Persistent link: https://www.econbiz.de/10011030758
directly in a building wall to reduce transmission heat losses. The Active Low Exergy Geothermal Insulation Systems (ALEGIS …) minimizes exergy demand and maximizes the use of renewable geothermal heat from the ground. A fluid is pumped into a small pipe … exergy input. We present an overview of the operation and analysis of our low exergy concept and its modeled performance. …
Persistent link: https://www.econbiz.de/10011030771
constraints, in order to minimize the overall exergy destruction, <em>i.e.</em>, to move up the exergy efficiency of the entire …, operating as simple and cascade cycles, were investigated. Combined exergy analysis and pinch optimization was performed to … identify the potential of various working fluids, by their properties, to overcome the global irreversibility according to the …
Persistent link: https://www.econbiz.de/10011030792
Research Operation. Our objective was to design a space to evaluate the performance of Swiss-developed low exergy building … tropics was to design and build a test bed out of the shipping containers that transported the prototype low exergy systems …
Persistent link: https://www.econbiz.de/10011030892
.83 under the conditions used in this study. However, higher S/B ratios have a negative effect on the energy and exergy … values for the energy and exergy efficiencies are 81.5% and 76.2%, respectively. Based on the calculated limitation values …, where the highest chemical energy (exergy) of the produced syngas and maximum achievable efficiencies are determined, a …
Persistent link: https://www.econbiz.de/10011030979
. Exergy has been promoted as a preferred means of characterizing the impacts of resource consumption and waste production for … comprehensive formulations of the chemical exergy reference environment, for the purpose of better understanding how exergy can … inform decision-making. Four related insights emerged from the analysis, notably: (1) standard and universal chemical exergy …
Persistent link: https://www.econbiz.de/10011031064
irreversibility and exergy efficiency of the process. The process performances are also estimated under the condition of saturated … compression. In this study exergy analysis of the overspray process in gas turbine system is carried out with a non … results show that the irreversibility increases but the saturated irreversibility decreases with increasing initial droplet …
Persistent link: https://www.econbiz.de/10011031089