Exergoeconomic analysis and evaluation of energy-conversion plants—I. A new general methodology

Tsatsaronis, George; Winhold, Michael

doi:10.1016/0360-5442(85)90020-9

Cited by 200 publications

(61 citation statements)

References 3 publications

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“…In consequence each component can be evaluated according to the cost formation of the product separately. For the analysis in the present work the proposed method by Tsatsaronis and Winhold (Tsatsaronis &Winhold 1985) is used. The so-called exergy costing converts an exergy stream i E  to a cost stream i C  , by multiplying the exergy with a corresponding factor c i :…”

Section: Exergoeconomic Analysismentioning

confidence: 99%

Exergoeconomic optimization of an Organic Rankine Cycle for low-temperature geothermal heat sources

Heberle¹,

Bassermann²,

Preißinger³

et al. 2012

Int. J. Thermo

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An exergoeconomic analysis of a geothermal power generation for a low-temperature resource is performed. An Organic Rankine Cycle (ORC) with isobutane and isopentane as working fluids is considered as binary power plant. A systematic parameter variation is done for the minimum temperature difference in the evaporator and condenser. The most suitable design parameters are evaluated under exergetic, economic and exergoeconomic criteria. The specific costs of electricity generation are minimal for the use of isobutane as working fluid and minimal temperature difference of 3 K at evaporation and 7 K at condensation. The most suitable concept for isopentane leads to only 0.4 % higher specific costs although the second law efficiency is 4.75 % lower. The exergoeconomic analysis permits to consider important criteria, like design and operating parameters in the fluid selection for ORC applications.Keywords: Organic Rankine Cycle; ORC; geothermal heat source; exergoeconomic analysis. IntroductionGeothermal power generation is a promising technology among the renewable energies.

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Section: Exergoeconomic Analysismentioning

confidence: 99%

Exergoeconomic optimization of an Organic Rankine Cycle for low-temperature geothermal heat sources

Heberle¹,

Bassermann²,

Preißinger³

et al. 2012

Int. J. Thermo

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“…Matter and energy flows entering and exiting a given system are classified into fuel and product. Fuel (F) refers to the resources that the component uses to achieve its purpose, and product (P) corresponds to the flows related to that purpose [21].…”

Section: Thermoeconomic Analysismentioning

confidence: 99%

Thermoeconomic Analysis of Biodiesel Production from Used Cooking Oils

2015

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Biodiesel from used cooking oil (UCO) is one of the most sustainable solutions to replace conventional fossil fuels in the transport sector. It can achieve greenhouse gas savings up to 88% and at the same time reducing the disposal of a polluting waste. In addition, it does not provoke potential negative impacts that conventional biofuels may eventually cause linked to the use of arable land. For this reason, most policy frameworks favor its consumption. This is the case of the EU policy that double-counters the use of residue and waste use to achieve the renewable energy target in the transport sector. According to different sources, biodiesel produced from UCO could replace around 1.5%-1.8% of the EU-27 diesel consumption. This paper presents an in-depth thermoeconomic analysis of the UCO biodiesel life cycle to understand its cost formation process. It calculates the ExROI value (exergy return on investment) and renewability factor, and it demonstrates that thermoeconomics is a useful tool to assess life cycles of renewable energy systems. It also shows that UCO life cycle biodiesel production is more sustainable than biodiesel produced from vegetable oils.

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“…This rule was originally formulated for heat exchangers, and prescribes that the temperature differences between the heating and heated fluid should not be too small (because the necessary heat transfer area will be too large) but also not too high (because the irreversibility in a heat transfer process grows with the T). The rule applies with obvious modifications to chemical, electrical and fluid processes where the exergy decrement of one stream is the "fuel" Throughout this paper, the words "fuel" and "product" are used in the acception proposed by Tsatsaronis [9,10], i.e., as "used exergy input" and "useful exergy output" respectively. used to increase the exergy content of another stream: the exergy destruction is proportional in all cases to the square of the driving force (ΔT, ΔG, ΔV, ΔH).…”

Section: Do Not Use Excessively Large or Excessively Small Thermodynamentioning

confidence: 99%

A Critical Interpretation and Quantitative Extension of the Sama-Szargut Second Law Rules in an Extended Exergy Perspective

Sciubba

2014

Energies

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Twenty-five years ago, Gaggioli, Sama and Qian published a series of 10 "second law guidelines" for design and process engineers, nicknamed at that time "the Gaggioli-Sama rules". These guidelines, some of them previously published by Sama between 1980 and 1983, are a compilation of "second law errors" to avoid in the design of energy conversion systems. The list was rearranged several times, until a revised version containing 21 rules was published by Sama and Szargut in 1995. Ever since, these guidelines came to be known as "the Sama-Szargut rules". The rules are a series of well-formulated and insightful suggestions that reflect a thermodynamicist's idea that the "best design" is the one that minimizes the overall irreversibility in a process or plant, under the prescribed technological constraints. Characteristically, the concept of "optimal system" is completely absent, the emphasis being on the extensive inclusion of second law reasoning into design decisions. A critical analysis of the rules would suggest that all of them be routinely implemented both in new designs and most important in retrofit projects. A survey of some of the current most common energy conversion installations shows that, quite on the contrary, most of the rules are disregarded in practical applications. This paper argues that the reason for this incongruency is the neglection in the engineering design decision of the real cost of installation, operation and decommissioning of a plant, and proposes a rephrasing of the rules in an extended exergy perspective: if the production cost, including the externalities, is measured in units of equivalent primary exergy, the Sama-Szargut rules can be directly interpreted in this sense, and abidance by the rules results in the reduction of the resource cost for any given objective. OPEN ACCESSEnergies 2014, 7 5358

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Exergoeconomic analysis and evaluation of energy-conversion plants—I. A new general methodology

Cited by 200 publications

References 3 publications

Exergoeconomic optimization of an Organic Rankine Cycle for low-temperature geothermal heat sources

Exergoeconomic optimization of an Organic Rankine Cycle for low-temperature geothermal heat sources

Thermoeconomic Analysis of Biodiesel Production from Used Cooking Oils

A Critical Interpretation and Quantitative Extension of the Sama-Szargut Second Law Rules in an Extended Exergy Perspective

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