نتایج جستجو برای: advanced exergy analysis

تعداد نتایج: 3021485  

Journal: :energy equipment and systems 0
mona rahmatian department of mechanical engineering, faculty of engineering & technology, alzahra university, tehran, iran fateme ahmadi boyaghchi department of mechanical engineering, faculty of engineering & technology, alzahra university, tehran, iran

the present research proposes and optimizes the performance of a novel solar-driven combined cooling, heating, and power (cchp) kalina system for two seasons—winter and summer—based on exergy, exergo-economic, and exergo-environmental concepts applying a non-dominated sort genetic algorithm-ii (nsga-ii) technique. three criteria, i.e. daily exergy efficiency, total product cost rate, and total ...

Journal: :Journal of Non-Equilibrium Thermodynamics 2017

2012
C. M. Beal

Although algal biofuels possess great potential, profitable production is quite challenging. Much of this challenge is rooted in the thermodynamic constraints associated with producing fuels with high energy, low entropy, and high exergy from dispersed materials. In this study, a preliminary thermodynamic analysis is presented that calculates the energy, entropy, and exergy of the intermediate ...

Journal: Gas Processing 2017

The POXR and SMR methods adopted in producing hydrogen from methane gas are simulated and exergy analysis of both the processes are run for comparison. The effective parameters of the feeding materials ratio and the system temperature for maximizing hydrogen production and increasing efficiency are assessed here. Influenced by the changes in these parameters the unit efficiency is increased up ...

2002
Noam Lior Benjamin Franklin

In face of the likely doubling of the world population and perhaps tripling of the power demand over the next 50 years, this paper (1) presents some thoughts on the possible ways to meet the power demands under the constraints of increased population and land use while holding the environmental impact to a tolerable one, and (2) outlines the ways exergy analysis may be effectively used in the c...

Exergy analysis emboldens in cases that all the inefficiencies and bottlenecks to improve energy systems are to be addressed. In this study, a novel vapor compression air dehumidifier integrated with an auxiliary heat exchanger in series arrangement with the main condenser in order to mitigate the reheat coil, and an extra mixing box to recover the ventilated air heat has been introduced. A com...

Journal: :gas processing 0
gholam reza salehi department of mechanical engineering, nowshahr branch, islamic azad university, nowshahr, iran majid amidpour faculty of mechanical engineering, k. n. toosi university of technology, tehran, iran amir salehi faculty of mechanical engineering, k. n. toosi university of technology, tehran, iran mostafa maleki department of industrial engineering, university of kurdistan, kurdistan, iran bahram ghorbani faculty of mechanical engineering, k. n. toosi university of technology, tehran, iran

abstract: in this paper, an exergy analysis approach is proposed for optimal design of distillation column by using simulated annealing algorithm. first, the simulation of a distillation column was performed by using the shortcut results and irreversibility in each tray was obtained. the area beneath the exergy loss profile was used as irreversibility index in the whole column. then, first opti...

Journal: :international journal of environmental research 0
e. amirabedin department of mechanical engineering, faculty of engineering, gazi university, 06570, maltepe ankara, turkey d. mcilveen-wright room 26b16, school of the built environment, university of ulster, jordanstown campus, shore road, newtownabbey, co. antrim, bt37 0qb, northern ireland

biomass co-firing with lignite represents an attractive solution for operating lignite-fired thermalpower plants (tpp) with the dual advantage of using local renewable resources and simultaneously reducingemissions. the subject of this study is technical and environmental investigation of the feasibility of the cofiring of soma lignite with some dried agricultural residues in the soma thermal p...

2012
Forrest Meggers Luca Baldini

Ground heat is a renewable resource that is readily available for buildings in cool climates, but its relatively low temperature requires the use of a heat pump to extract it for heating. We developed a system that uses low temperature ground heat directly in a building wall to reduce transmission heat losses. The Active Low Exergy Geothermal Insulation Systems (ALEGIS) minimizes exergy demand ...

2010
N. Shankar Ganesh T. Srinivas

In Kalina power generation as well as vapor absorption and refrigeration systems ammonia-water mixture has been used as working fluids. Unlike for pure components, binary mixtures additionally need mixture concentration to solve thermodynamic properties. A flowchart is developed to understand the computations of the properties. The thermodynamic properties for ammonia-water mixture have been ge...

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