Results 151 to 160 of about 3,985 (187)

Exergy Efficiency in Industry: Where Do We Stand?

Environmental Science & Technology, 2011
Efficiency is a term generally used to determine how well a system performs. However, efficiency can have different meanings and, unaccompanied by a formal definition or taken out of context, can lead to serious misconceptions. In many official publications, efficiency is calculated as the ratio of useful output to energy input.
Robert U, Ayres, Laura, Talens Peiró, Gara, Villalba Méndez   +2 more
openaire   +2 more sources

Exergy-Based Efficiency and Renewability Assessment of Biofuel Production

Environmental Science & Technology, 2005
This study presents an efficiency and renewability analysis of the production of three biofuels: rapeseed methyl ester (RME), soybean methyl ester (SME) and corn-based ethanol (EtOH). The overall production chains have been taken into account: not only the agricultural crop production and the industrial conversion into biofuel, but also production of ...
J, Dewulf, H, Van Langenhove, B, Van De Velde   +2 more
openaire   +2 more sources

Through exergy approach to more efficient processes

2000
This paper compares three different types of a turbine-converter-expander combination with respect to the exergetic efficiency. Converter stands for a combustion chamber, a Solid Oxide Fuel Cell and a reactor in which a chemical process is carried out. The exergy losses for the first examples are 22%. The exergy losses for the other two examples can be
PLOUMEN, P., JANSSEN, F.j.j.g.
openaire   +2 more sources

Exergy efficient building design

2008
Building ...
openaire   +1 more source

Calculation of exergy losses, exergy efficiency and cooling coefficient of refrigerant R22

International Journal of Science and Research Archive
This study presents a detailed analysis of the exergy losses, exergy efficiency, and cooling coefficient of performance (COP) for the refrigerant R22 in refrigeration systems. Exergy analysis, which considers both the quantity and quality of energy, is used to identify and quantify the irreversibilities within the system. The objective of this analysis
openaire   +1 more source

Study of exergy efficient distillation technologies

2021
Crude oil distillation is the core separation process in any refinery; However, distillation process is one of the most energy- intensive processes in the chemical process industry and with more than 40000 distillation columns operating all over the world, they consume over 40% of the energy used in the chemical processes.
openaire   +1 more source

Analysis of the effect of characteristic parameters and operating conditions on exergy efficiency of alkaline water electrolyzer

Journal of Power Sources, 2022
Song Hu, Fuyuan Yang, Jian Dang
exaly  

Exergy efficiency of solar components and systems

2017
The solar energy is an inexhaustible source of energy and offers many environmental advantages compared to conventional energy sources. This paper deals with exergy efficiency of solar systems. The exergy is the measure of the maximum useful work which can be achieved by a system having to interact with an environment which is at a constant pressure ...
Jaramaz, Lana, Banjac, Miloš
openaire   +1 more source

Exergy Efficient Application of LNG Cold

2010
Technology, Policy and ...
Stougie, L. (author), Van der Kooi, H.J. (author)   +1 more
openaire   +1 more source

A comparison of exergy efficiency definitions with focus on low temperature processes

Energy, 2012
Danahe Marmolejo-Correa, Truls Gundersen   +1 more
exaly