A comparative exergoeconomic analysis of different ORC configurations for binary geothermal power plants

Zare, V.

doi:10.1016/j.enconman.2015.07.073

Cited by 215 publications

(73 citation statements)

References 37 publications

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“…An increasing amount of researchers estimate the costs of components based on equipment correlations, using either percentages ( [32]) or multiplication factors ( [33][34][35]) to estimate the total project costs based on the module/equipment costs. Techno-economic ( [22,[36][37][38][39][40][41]) as well as thermo-or exergoeconomic ( [33,[42][43][44]) methods are used to simultaneously analyze technical and economic aspects and tradeoffs. Figure 1 displays a review of published data on estimated ORC investment costs.…”

Section: Orc Investment Costs: a Brief Literature Reviewmentioning

confidence: 99%

Cost Engineering Techniques and Their Applicability for Cost Estimation of Organic Rankine Cycle Systems

Lemmens

2016

Energies

126

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Abstract:The potential of organic Rankine cycle (ORC) systems is acknowledged by both considerable research and development efforts and an increasing number of applications. Most research aims at improving ORC systems through technical performance optimization of various cycle architectures and working fluids. The assessment and optimization of technical feasibility is at the core of ORC development. Nonetheless, economic feasibility is often decisive when it comes down to considering practical instalments, and therefore an increasing number of publications include an estimate of the costs of the designed ORC system. Various methods are used to estimate ORC costs but the resulting values are rarely discussed with respect to accuracy and validity. The aim of this paper is to provide insight into the methods used to estimate these costs and open the discussion about the interpretation of these results. A review of cost engineering practices shows there has been a long tradition of industrial cost estimation. Several techniques have been developed, but the expected accuracy range of the best techniques used in research varies between 10% and 30%. The quality of the estimates could be improved by establishing up-to-date correlations for the ORC industry in particular. Secondly, the rapidly growing ORC cost literature is briefly reviewed. A graph summarizing the estimated ORC investment costs displays a pattern of decreasing costs for increasing power output. Knowledge on the actual costs of real ORC modules and projects remains scarce. Finally, the investment costs of a known heat recovery ORC system are discussed and the methodologies and accuracies of several approaches are demonstrated using this case as benchmark. The best results are obtained with factorial estimation techniques such as the module costing technique, but the accuracies may diverge by up to +30%. Development of correlations and multiplication factors for ORC technology in particular is likely to improve the quality of the estimates.

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Section: Orc Investment Costs: a Brief Literature Reviewmentioning

confidence: 99%

Cost Engineering Techniques and Their Applicability for Cost Estimation of Organic Rankine Cycle Systems

Lemmens

2016

Energies

126

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“…To estimate the costs in an exergoeconomic analysis, the cost balance is required which is used in this study. The cost balance and flow cost rate Ċ for the entire system operating at steady state condition is expressed as follows:

{\overset{C}{true}}_{p, tot} = {\overset{C}{true}}_{F, tot} + {\overset{Z}{true}}_{tot}^{Cl} + {\overset{Z}{true}}_{tot}^{OM}

{\overset{C}{true}}_{j} = c_{j} {\overset{E}{true}}_{j}

…”

Section: Methodsmentioning

confidence: 99%

Analysis, economical and technical enhancement of an organic Rankine cycle recovering waste heat from an exhaust gas stream

Ghoreishi

Vakilabadi

Bidi

et al. 2019

Energy Science & Engineering

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Any effort with the aim of increasing the total electrical power generation (EPG) due to the existed constraints in vessels is desired in power plants. Using Organic Rankine Cycle (ORC) for recovering waste heat of an exhausting gas is considered as an auxiliary way for improving EPG value. In this study, four ORC arrangements were first modeled for six refrigerants by EES software and the first and second laws of thermodynamics efficiency (ηI and ηII, respectively) and mass flow rate were studied for these cycles. Based on modeling results, the best arrangement was selected for each refrigerant such as; F‐type (Reference cycle+ Intermediate recuperator+ Final recuperator) for R123, H‐type (Reference cycle+ Intermediate recuperator) for R114 and n‐butane and R‐type (Reference cycle + Final recuperator) for n‐pentane, n‐heptane, and toluene. The ηI value as a technical objective function was then optimized for the above cycles by Aspen HYSYS. n‐heptane and toluene cycles were chosen due to higher first‐law efficiency value and then were studied under different source temperature condition and n‐heptane cycle showed better adaptability. Afterward, exergoeconomic was applied on n‐heptane cycle and maximum cycle pressure was chosen as a design variable for economically optimizing net final income (NFI). Finally, NFI value is increased from 423.1$/kW·h to 609.9$/kW·h about 44.2%, while the second‐law efficiency value is just decreased from 25.6% to 20.6% about 5%.

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“…Organic Rankine cycle is an outstanding cycle for taking advantage of mid‐/low‐level temperature sources and power generation by means of a turbine . It is worth mentioning that both the first and second law efficiencies of ORC depend on heat sink temperature . The design aspects and equipment specifications of an appropriate ORC for coupling with the proposed system are investigated and presented in the following sections.…”

Section: Heat Utilization System Design Modelling and Evaluationmentioning

confidence: 99%

A waste heat recovery system development and analysis using ORC for the energy efficiency improvement in aluminium electrolysis cells

2017

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Summary The present work investigates an active waste heat recovery system for the side walls of the aluminium electrolysis cells, enabling utilization of the extracted heat in power generation. This will potentially lead to energy efficiency improvement in the primary aluminium production industry and an enhanced aluminium production rate. An experimentally validated loop thermosyphon heat pipe model was used for heat extraction from the cell side wall. Boosting system thermal efficiency through waste heat recovery, by means of a heat utilization system, and increasing the level of control, as well as thermal equilibrium, stand as the main addressed objectives of the current study, which consequently result in an increased aluminium production rate. An organic Rankine cycle is incorporated into the system, and its performance is evaluated, taking into consideration the operating situations in terms of available temperature and thermal power range.

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A comparative exergoeconomic analysis of different ORC configurations for binary geothermal power plants

Cited by 215 publications

References 37 publications

Cost Engineering Techniques and Their Applicability for Cost Estimation of Organic Rankine Cycle Systems

Cost Engineering Techniques and Their Applicability for Cost Estimation of Organic Rankine Cycle Systems

Analysis, economical and technical enhancement of an organic Rankine cycle recovering waste heat from an exhaust gas stream

A waste heat recovery system development and analysis using ORC for the energy efficiency improvement in aluminium electrolysis cells

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