A hierarchical approach for evaluating and selecting waste heat utilization opportunities

Oluleye, Gbemi; Jobson, Megan; Smith, Robin

doi:10.1016/j.energy.2015.05.086

Cited by 32 publications

(13 citation statements)

References 16 publications

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“…The PBP for the proposed site-wide heat network was calculated using Equation 11 where the denominator consists of the economic value of the heat savings Q i int in each plant as well as the heat sales to the DH system.…”

Section: Economic Analysismentioning

confidence: 99%

“…However, possibilities for further increasing the efficiency of the industrial processes, eg, by increased heat recovery, often exist. For instance, Oluleye et al evaluated several on‐site and off‐site alternatives for excess heat utilization using earnings per unit of reduced emissions as a ranking criterion …”

Section: Introductionmentioning

confidence: 99%

“…For instance, Oluleye et al evaluated several on-site and offsite alternatives for excess heat utilization using earnings per unit of reduced emissions as a ranking criterion. 11 In some studies, the term unavoidable waste heat is proposed to better address the industrial excess heat that cannot be recovered and reused at the plant site. 12 Several possible technologies can be adopted for efficient utilization of industrial excess heat.…”

Section: Introductionmentioning

confidence: 99%

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A feasibility study of improved heat recovery and excess heat export at a Swedish chemical complex site

2017

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Summary New ambitious targets for reduced greenhouse gas emissions and increased energy efficiency in industry and in the stationary energy sector provide incentives for industrial plants to investigate opportunities for substantially increasing recovery and use of excess heat from their operations. This work investigates the economic feasibility of recovering industrial excess heat at a Swedish chemical complex site for increased site internal heat recovery or export to a regional district heating (DH) network. The work is based on investment cost data estimated in previous work by the authors. A site‐wide heat collection and distribution system based on circulating hot water was envisioned, which is also connected to a regional DH network. With the help of multiobjective optimization, the optimal heat contributions from the individual plant sites were identified that minimize the total system cost for a large range of options involving different quantities of internally recovered heat and heat export to the DH system. A payback period analysis was conducted together with a risk assessment to take into account uncertainty regarding utility steam production cost and heat sale price. The results of the study indicate that a payback period of around 3 years can be achieved for a number of cases in which 30% to 50% of the total excess heat produced by the site plants is recovered. Although it seems more profitable to recover heat at the site rather than exporting heat to the DH system only, profitability appears to be maximized by hybrid solutions that allow a share of the excess heat to be sold to the DH system and some heat to be recovered at the site simultaneously.

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Section: Economic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A feasibility study of improved heat recovery and excess heat export at a Swedish chemical complex site

2017

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“…Nasir et al proposed an organic Rankine cycle coupled vapor compression cycle for air conditioning. The integration of the organic Rankine cycle and vapor compression‐absorption cascade refrigeration cycle was used as a tri‐generation system by Patel et al A framework and the corresponding model for selection and integration of different waste heat recovery technologies for the heat source temperature of below 100°C were given by Oluleye et al…”

Section: Introductionmentioning

confidence: 99%

Thermoeconomic analysis of optimization potential for CO ₂ vapor compression cycle: From transcritical to supercritical operation for waste heat recovery from the steam condenser

Wang

Zhang

2018

Int J Energy Res

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Summary Recent research has been focused on the utilization of low‐grade waste heat, and the industrial high‐temperature heat pump can be an alternative technology because of its simplicity and outstanding performance. However, the use of carbon dioxide in vapor compression heat pumps with high‐temperature heat source is still to be optimized because of low critical temperature. In the present study, a system for waste heat recovery from the steam condenser using CO2 vapor compression cycle is modeled from the energetic, exergetic, and economic perspectives, and optimized system performances are obtained by dual‐objective Jaya algorithm. Potential optimized operating strategies for transcritical cycle are discussed by the parametric study and T‐s diagrams. The transcritical and supercritical cycles are further compared with each other considering different steam temperatures. The optimization strategies of transcritical cycle are based on the main purpose to improve the evaporation potential and achieve transcritical cycles with the critical point inside the closed region surrounded by the process curves, so lower superheating degree and minimum temperature difference of gas cooler, higher evaporating temperature, and more return water cooling should be employed in order to promote the cycle performances. In comparison with transcritical cycles performances, the supercritical operation shows superior performances, which are less sensitive to the variations of return water temperature.

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“…In light of the continuing shift towards sustainable industrial systems, low to medium grade heat to power conversion has become of increasing importance for low emissions electricity supply [1][2][3]. Low to medium temperature heat source streams can be found in many systems including industrial processes, geothermal energy, biomass, and solar energy [4].…”

Section: Introductionmentioning

confidence: 99%

Power Generation Targets from Hot Composite Curves

Al-Ani

Linke

2018

Energies

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Abstract:The paper proposes a simple systematic procedure to target thermodynamic power generation limits from a set of heat source streams. The procedure takes the form of an algebraic targeting approach commonly applied in process heat integration. It allows the designer to quickly determine the maximum amount of power that can theoretically be generated from the available heat in thermodynamic cycles. The paper describes the procedure and is applicability in the context of common data availability for heat source streams in the form of a Composite Curve or Total Site Profile (hot composite curves) commonly developed in heat integration. The application of the procedure is illustrated with examples.

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A hierarchical approach for evaluating and selecting waste heat utilization opportunities

Cited by 32 publications

References 16 publications

A feasibility study of improved heat recovery and excess heat export at a Swedish chemical complex site

A feasibility study of improved heat recovery and excess heat export at a Swedish chemical complex site

Thermoeconomic analysis of optimization potential for CO ₂ vapor compression cycle: From transcritical to supercritical operation for waste heat recovery from the steam condenser

Power Generation Targets from Hot Composite Curves

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A hierarchical approach for evaluating and selecting waste heat utilization opportunities

Cited by 32 publications

References 16 publications

A feasibility study of improved heat recovery and excess heat export at a Swedish chemical complex site

A feasibility study of improved heat recovery and excess heat export at a Swedish chemical complex site

Thermoeconomic analysis of optimization potential for CO 2 vapor compression cycle: From transcritical to supercritical operation for waste heat recovery from the steam condenser

Power Generation Targets from Hot Composite Curves

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Product

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Thermoeconomic analysis of optimization potential for CO ₂ vapor compression cycle: From transcritical to supercritical operation for waste heat recovery from the steam condenser