Multi-Objective Thermo-Economic Optimization Strategy for ORCs Applied to Subcritical and Transcritical Cycles for  Waste Heat Recovery

Lecompte, Steven; Lemmens, Sanne; Huisseune, Henk; Broek, Martijn van den; Paepe, Michel De

doi:10.3390/en8042714

Cited by 55 publications

(33 citation statements)

References 68 publications

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“…Because there is little information about the component costs of actual ORC systems, most researchers use publicly available correlations for standard equipment items. For instance, Lee et al [62] were early to use component correlations to estimate the costs of an ORC heat recovery system. Quoilin et al [71] combine correlations from literature [14] with self-derived ones.…”

Section: Estimating the Purchased Equipment Costsmentioning

confidence: 99%

“…Finally, the module costing technique illustrated by Turton et al [13] is a commonly used factorial cost estimation method based on the approach of Guthrie [13]. It is increasingly applied in ORC research (see e.g., [47,48,50,61,62,65]). This technique is suitable for preliminary estimates in the −20% to +30% accuracy range.…”

Section: Estimating the Total Investment Costs: Multiplication Factorsmentioning

confidence: 99%

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

Lemmens

2016

Energies

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120

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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: Estimating the Purchased Equipment Costsmentioning

confidence: 99%

Section: Estimating the Total Investment Costs: Multiplication Factorsmentioning

confidence: 99%

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

Lemmens

2016

Energies

Self Cite

120

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“…The ORC thermal efficiency can be expressed as Equation (20) according to the first law of thermodynamic.…”

Section: Of 23mentioning

confidence: 99%

“…The capital cost estimation for each component of the regenerative ORC system is expressed as [20,32] C BM = C b F bm (37)…”

Section: Economical Modelmentioning

confidence: 99%

Thermo-Economic Performance Analysis of a Regenerative Superheating Organic Rankine Cycle for Waste Heat Recovery

Han

et al. 2017

Energies

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Abstract:The Organic Rankine Cycle (ORC) is a promising form of technology for recovering low-grade waste heat. In this study, a regenerative ORC system is established to recover the waste flue gas of 160 • C. Focusing on thermodynamic and economic performance while simultaneously considering the limitations of volume flow ratio (VFR) and the effect of superheat, working fluid selection and parameter optimization have been investigated. The optimization of the evaporation temperature is carried out by analyzing the variation of net power output and specific investment cost (SIC). Then, the net power output, specific net power output, total exergy destruction rate, VFR, total capital cost, and levelized electricity cost (LEC) are selected as criteria, and a fuzzy multi-criteria evaluation method is adopted to select a more suitable working fluid and determine the optimal degree of superheat. In addition, the preheating coefficient, latent heat coefficient, superheating coefficient, and internal heat coefficient were proposed to explore the effect of working fluid critical temperature on thermal efficiency. Research studies demonstrate that there is an optimal evaporation temperature, maximizing net power output and minimizing the SIC. Isohexane and butane have greater specific net power output due to greater latent heat. A suitable degree of superheat is not only conducive to improving the working capacity of working fluids, but also reduces the VFR, total capital cost, SIC, and LEC for different working fluids. Thus, the system's thermodynamic and economic performance-as well as the operational stability-are improved. Among the six working fluids, butane exhibits the best comprehensive performance, and its optimal evaporation temperature and degree of superheat are 100 • C and 5 • C, respectively.

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“…As for instance, Campana et al [3] estimated an installation potential of 2705 MW e in Europe, which would lead to about 21.6 TWh e of electricity production with a corresponding reduction of greenhouse gas emissions (GHG) of about 8.1 million. Consequently, a lot of efforts have been put by researchers and engineers to investigate deeply the performance and benefits of this technology [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Technical and economic optimization of subcritical, wet expansion and transcritical Organic Rankine Cycle (ORC) systems coupled with a biogas power plant

Dumont

Dickes

Роса

et al. 2018

Energy Conversion and Management

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A B S T R A C TGenerally, > 40% of the useful energy (cooling engine and exhaust gases) are wasted by a biogas power plant through the cooling radiator and the exhaust gases. An efficient way to convert this waste heat into work and eventually electricity is the use of an organic Rankine cycle (ORC) power system. Over the last few years, different architectures have been widely investigated (subcritical, wet expansion and trans-critical). Despite the promising performances, realistic economic and technical constraints, also related to the application, are required for a meaningful comparison between ORC technologies and architectures. Starting from the limited literature available, the aim of the present paper is to provide a methodology to compare sub-critical, transcritical and wet expansion cycles and different types of expanders (both volumetric and turbomachinery) from both technical and economic point of view, which represent one of the main novel aspects of the present work. In particular, the paper focuses on the thermo-economic optimization of an ORC waste heat recovery unit for a 500 kWe biogas power plant located in a detailed regional market, which was not investigated yet. By means of a genetic algorithm, the adopted methodology optimizes a given economic criteria (Pay-Back Period, Net Present Value, Profitability Index and Internal Rate of Return) while respecting technical constraints (expander limitations) and thermodynamic constraints (positive pinch points in heat exchangers, etc.).The results show that optimal ORC solutions with a potential of energy savings up to 600 MWh a year and with a pay-back period lower than 3 years are achievable in the regional market analysed.

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Multi-Objective Thermo-Economic Optimization Strategy for ORCs Applied to Subcritical and Transcritical Cycles for Waste Heat Recovery

Cited by 55 publications

References 68 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

Thermo-Economic Performance Analysis of a Regenerative Superheating Organic Rankine Cycle for Waste Heat Recovery

Technical and economic optimization of subcritical, wet expansion and transcritical Organic Rankine Cycle (ORC) systems coupled with a biogas power plant

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