Results 41 to 50 of about 27,766 (222)

Expanding the exergy concept to the urban water cycle [PDF]

open access: yes, 2009
The world is urbanizing fast and this increases the pressure on available resources. In a world of cities, it is therefore crucial to take a new look at the way urban systems function: where do the resources come from and where do the wastes end up?
Leduc, W.R.W.A.   +3 more
core  

Exergy analysis of laminar fluid flow in stainless steel microtubes

open access: yes, 2011
In the study, exergy analysis of steady laminar fluid flow in stainless steel microtubes with diameters between 103 mu m and 179 mu m were conducted in the adiabatic conditions experimentally.
Hasan Kucuk   +7 more
core   +1 more source

Energy, exergy and environment analyses of a hybrid PV-system district heating system for a new household settlement in Germany

open access: yes, 2022
267292This work presents an exergetic and environmental assessment of a hybrid district heating system (HDHS) and normal district heating system (NDHS) analysed within two supply temperature levels. Energetic, exergetic and environmental performances are
Bouaziz, N.   +4 more
core   +1 more source

Characterization of Ecological Exergy Based on Benthic Macroinvertebrates in Lotic Ecosystems

open access: yesEntropy, 2013
The evaluation of ecosystem health is a fundamental process for conducting effective ecosystem management. Ecological exergy is used primarily to summarize the complex dynamics of lotic ecosystems.
Young-Seuk Park   +3 more
doaj   +1 more source

Numerical Analysis and Optimization of a Continuous‐Flow pH‐TRC for Steady‐State Low‐Grade Waste Heat Recovery

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A steady‐state numerical model is established for a continuous‐flow pH‐TRC for low‐grade waste heat recovery. Based on carbonate and bicarbonate electrolytes, the influences of operating conditions and electrode structure on pH‐driven power generation are clarified.
Jinpeng Hu   +7 more
wiley   +1 more source

Exergy analysis of transcritical two stage CO2 refrigeration system

open access: yesShipin yu jixie, 2023
Objective: In order to improve the energy efficiency of the transcritical two stage CO2 refrigeration system, the conventional exergy analysis and advanced exergy analysis of the system were conducted.
XU Hao   +3 more
doaj   +1 more source

Effects of Camber of S‐Series Airfoils on Aerodynamic Performance, Entropy Generation Rate, Irreversibility, and Second Law Efficiency of Horizontal Axis Wind Turbines

open access: yesEnergy Science &Engineering, EarlyView.
Due to the depletion of fossil fuels, enhancing wind turbine efficiency is crucial. Utilizing airfoils with high lift‐to‐drag ratios significantly improves power generation by optimizing aerodynamic parameters. Furthermore, entropy generation analysis serves as an effective method for design optimization by minimizing energy losses and exergy ...
Mitra Yadegari
wiley   +1 more source

Exergy Analysis

open access: yesEcology, Economy and Society–the INSEE Journal, 2023
This paper argues for a continuing exploration of Nature’s organizing principles that sustain prolonged homeostasis of the earth’s ecosystems punctuated by forceful transitions to new emergent states. Ecosystems develop and maintain a dynamically stable state by transacting energy and materials with the surrounding flows to keep reversing their ...
Chauhan, Tejasvi, Gaur, Vinod K
openaire   +1 more source

On exergy and sustainable development - Part 1 : conditions and concepts

open access: yes, 2001
The future of life on our planet is a matter of great concern. This paper is based on a vision of sustainable development. It is divided into two parts. The first part introduces conditions and concepts that are of importance for sustainable development.
Gong, Mei,, Wall, Göran,
core   +1 more source

The Exergy Losses Analysis in Adiabatic Combustion Systems including the Exhaust Gas Exergy

open access: yesEntropy, 2022
The entropy generation analysis of adiabatic combustion systems was performed to quantify the exergy losses which are mainly the exergy destroyed during combustion inside the chamber and in the exhaust gases. The purpose of the present work was therefore:
Senda Agrebi   +2 more
doaj   +1 more source

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