Thermodynamic analysis of a combined chemical looping-based trigeneration system

Özcan, Hasan; Dinçer, İbrahim

doi:10.1016/j.enconman.2014.06.011

Cited by 69 publications

(28 citation statements)

References 32 publications

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“… Similarly to the H2O/CO2 stream, the H2O/H2 stream could be reheated and expanded in a third gas turbine to obtain some extra work. This is the case in the CLHG system proposed by [14]. On the contrary, here we have preferred to consider a trigeneration scheme where some process heating is supplied by the H2O/H2 stream.…”

Section: Proposed Clhg Systemmentioning

confidence: 99%

“…[14] explores the case with syngas as fuel and [16] the case of methane. We refer to this option as extra-firing.…”

Section: Extra-firingmentioning

confidence: 99%

“…The reactors chemical looping adopted here is a three-reactor system previously proposed for CLHG from methane [16] and from syngas [14]. It is based in a cycle of reduction-oxidation of iron oxides.…”

Section: Clhg Reactorsmentioning

confidence: 99%

“…In this context, a combination of the two previous ideas, i.e. the integrated gasification of coal upstream to a syngas-fueled gas turbine system, and the CLHG concept itself, is explored very convincingly by reference [14]. A complex system is modeled and both, energy and exergy analysis are provided.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic analysis of a dual power-hydrogen production system based on chemical-looping combustion

Álvaro

Montesino

Orgaz

et al. 2017

Energy

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Chemical-looping hydrogen generation (CLHG) is a chemical-looping combustion variant that allows simultaneous production of power and hydrogen. A thermodynamic analysis from the exergy method point of view of an integrated syngas-fueled CLHG cycle is carried out with the aim of contributing to the conceptual understanding and development of CLHG systems. The cycle working point is optimized in a range of conditions. The proposed system shows a very interesting potential for power, hydrogen and process heating coproduction with high efficiency.

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Section: Proposed Clhg Systemmentioning

confidence: 99%

“…[14] explores the case with syngas as fuel and [16] the case of methane. We refer to this option as extra-firing.…”

Section: Extra-firingmentioning

confidence: 99%

Section: Clhg Reactorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermodynamic analysis of a dual power-hydrogen production system based on chemical-looping combustion

Álvaro

Montesino

Orgaz

et al. 2017

Energy

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“…Organic Rankine cycle (ORC) compared to traditional power systems have the potential to work at lower temperature related to the working fluid used. Here, heat is generally supplied from outside such as industrial waste heat [1][2][3], solar energy [4][5][6] and geothermal and SOFC exhaust energy [7][8][9][10][11]. ORC has four main components [12]; these are pump, evaporator, turbine and condenser.…”

Section: Introductionmentioning

confidence: 99%

Comparative Thermodynamic Assessment of Various Super- and Trans-Critical Working Fluids for Low Temperature Power Generation Applications

Özcan¹,

Seyitoğlu²

2017

Journal of Polytechnic

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Bu makaleye şu şekilde atıfta bulunabilirsiniz (To cite to this article): Ozcan H. and Seyıtoglu S. S., "Comparative thermodynamic assessment of various super-and trans-critical working fluids for low temperature power generation applications", Politeknik Dergisi, 20(4): 915-921, (2017). Politeknik Dergisi, 2017; 20 (4) : 915-921 Journal of Polytechnic, 2017; 20 (4) ABSTRACTRecently, energy need is exponentially increasing in the world while energy sources are decreasing rapidly. Therefore, this issue requires energy sources to be used more efficiently and urges professionals to utilize energy from low temperature energy sources such as waste heat and low temperature renewable sources. In this study, energy and exergy analyses of several clean working fluids are comparatively studied in several organic Rankine cycle configurations. CO2, N2O, and SF6 fluids are compared with the conventional R23 in three ORC configurations, namely the basic ORC cycle, regenerative ORC cycle, and reheat and regenerative ORC cycle, respectively. Effects of various selected system and environmental parameters on the system performances are comprehensively investigated. Even though R23 shows the best energy and exergy performances than those of other investigated working fluids at low-temperature applications, N2O and CO2 provide a clean solution to high GWP (global warming potential) R23 with similar performance characteristics at low and high temperature power generation applications.Keywords: Organic rankine cycle, energy, exergy, R23, CO2, N2O, SF6. ÖZSon zamanlarda, enerji ihtiyacı dünyada katlanarak artarken enerji kaynakları hızla azalmaktadır. Bu yüzden, bu konu enerji kaynaklarının daha verimli kullanılması ve uzmanları atık ısı ve düşük sıcaklık yenilenebilir enerji kaynakları gibi düşük sıcaklık kaynaklarının kullanmalarını gerektirir. Bu çalışmada, birbirinden farklı temiz akışkanların enerji ve ekserji analizleri farklı organik Rankine çevrim konfigürasyonlarında karşılaştırmalı olarak incelenmiştir. CO2, N2O ve SF6 akışkanları geleneksel R23 akışkanı ile sırasıyla temel organik Rankine çevirimi, ara buhar almalı organik Rankine çevrimi ve ara ısıtmalı-ara buhar almalı organik Rankine çevrimlerinde karşılaştırılmıştır. Çeşitli seçilmiş sistemlerin ve çevresel parametrelerin sistem performanslarına etkileri kapsamlı olarak incelenmiştir.Anahtar Kelimeler: Organik rankine çevrimi, enerji, ekserji, R23, CO2, N2O, SF6.

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Thermodynamic and environmental impact assessment of steam methane reforming and magnesium-chlorine cycle-based multigeneration systems

Özcan

Dinçer

2015

Int. J. Energy Res.

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Summary In this study, thermodynamic analyses and environmental impact assessments of two integrated systems are comparatively performed for multigenerational applications. The first system consists of a heliostat solar heat and power generation field as energy source, a magnesium–chlorine (Mg–Cl) hybrid thermochemical cycle for hydrogen production, a steam Rankine cycle for power production, and a LiBr–water absorption chiller cycle for space cooling application. The second system is same as the first system except that the steam methane reforming (SMR) which considered for hydrogen production instead of Mg–Cl cycle. The SMR method is commonly used to produce hydrogen; however, it has disadvantages such as releasing CO2 emissions and utilizing fossil fuels for reforming. Mg–Cl cycle can be considered as a promising thermoelectrochemical cycle for water splitting because of its simplicity and applicability as well as possessing higher energy and exergy efficiencies and stability of chemical reactions throughout the cycle. Comparative energy and exergy performance assessments of both integrated systems are performed, and their assessment results are presented and discussed. In addition to the performance evaluation, environmental impact and sustainability assessments of both integrated systems are performed. Furthermore, the study compares two hydrogen production systems in terms of their performances and environmental impacts at varying conditions. Energy and exergy efficiencies of the present systems are found to be 28.4–18.4% for the system I and 43.2–27.4% for the system II, respectively. Exergetic sustainability of SMR‐based system is higher than that of Mg–Cl‐based system. However, Mg–Cl system does not emit greenhouse gases during production and is more environmentally benign in terms of greenhouse gas emissions. Copyright © 2015 John Wiley & Sons, Ltd.

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Thermodynamic analysis of a combined chemical looping-based trigeneration system

Cited by 69 publications

References 32 publications

Thermodynamic analysis of a dual power-hydrogen production system based on chemical-looping combustion

Thermodynamic analysis of a dual power-hydrogen production system based on chemical-looping combustion

Comparative Thermodynamic Assessment of Various Super- and Trans-Critical Working Fluids for Low Temperature Power Generation Applications

Thermodynamic and environmental impact assessment of steam methane reforming and magnesium-chlorine cycle-based multigeneration systems

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