Biomass retrofit for existing solar organic Rankine cycle power plants: Conceptual hybridization strategy and techno-economic assessment

Oyekale, Joseph; Heberle, Florian; Petrollese, Mario; Brüggemann, Dieter; Cau, Giorgio

doi:10.1016/j.enconman.2019.06.064

Cited by 43 publications

(28 citation statements)

References 39 publications

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“…Figure 1 shows the conceptual hybrid Concentrated Solar Power (CSP)-biomass Organic Rankine Cycle (ORC) plant studied in this paper [32]. As illustrated, it is possible for the ORC to be fed by thermal power from either or both of the solar field and biomass furnace, depending on availability.…”

Section: System Descriptionmentioning

confidence: 99%

“…As aforementioned, this study seeks to modify cost formation process in advanced exergoeconomic analysis, with reference to the real ORC plant. Suffice it to emphasise here that the details of components design, modelling and firstlaw-based techno-economic analysis of the hybrid plant have been reported in a previous study, which also includes validation of simulation results with experimental data obtained from the real plant [32]. Based on this previous study, it is assumed here that biomass furnace constantly satisfies 40 % of the required ORC nominal thermal input, which corresponds to the minimum power essential for continuous plant operation.…”

Section: System Descriptionmentioning

confidence: 99%

“…Cost associated with engineering, procurement and construction (EPC) as well as taxes was factored into Z, at 11 %. The purchase costs of solar field and TES system are based on previous study [32]. The cost of Sardinian Eucalyptus was taken as 50 €/tonne in this study, which translates to 1.1 c€/kWh based on its energy contents.…”

Section: Advanced Exergoeconomic Analysismentioning

confidence: 99%

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Modified auxiliary exergy costing in advanced exergoeconomic analysis applied to a hybrid solar-biomass organic Rankine cycle plant

2020

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This study concerns advanced exergoeconomic analysis of a hybrid solar-biomass organic Rankine cycle (ORC) cogeneration plant. The hybrid plant had been previously conceived as structural optimization scheme to upgrade thermo-economic performance of a real 630 kW solar-ORC plant which currently runs in Ottana, Italy. The irreversibility rates, investment cost rates and irreversibility cost rates were obtained for each system component, based on thermodynamic balance as well as cost balance and auxiliary equations established for the components. Next, the avoidable/unavoidable and exogenous/endogenous splitting options were applied to investigate the sources of thermo-economic losses in the system, the effects of component interactions on the losses, as well as the best approach to improving the system. The main contribution of this paper centers on modification of the traditional auxiliary exergy costing in advanced exergoeconomic methodology, by incorporating stream energy quality into the cost formation process. Results showed that more than 50 % of total irreversibility rates can be avoided in almost all of the components of the hybrid plant, most of which are endogenous. Similarly, it was obtained that component interdependencies have little impact on thermo-economic losses. Specifically, more than 60 % of irreversibility cost rates could be avoidable in the hybrid plant by optimizing internal operations of each of the system components individually. Moreover, results showed that how auxiliary exergy costing is defined in advanced exergoeconomic method plays a significant role on the analysis, and the modified approach presented in this study is a viable choice.

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Section: System Descriptionmentioning

confidence: 99%

Section: System Descriptionmentioning

confidence: 99%

Section: Advanced Exergoeconomic Analysismentioning

confidence: 99%

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Modified auxiliary exergy costing in advanced exergoeconomic analysis applied to a hybrid solar-biomass organic Rankine cycle plant

2020

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“…The lowest LCOE, and the lowest payback period were calculated equal to 0.0716 (€/kWh), and 8.79 (years) for the optimum condition of the developed solar ORC system, respectively. Joseph et al proposed an idea for biomass retrofit for existing solar ORC plants for improving efficiency and flexibility. The retrofit system can increase working hours and economic competitiveness of solar ORC plants and the case study showed that annual net electrical efficiency increases by 4% to 5% points, relative to the solar‐only ORC plant.…”

Section: Introductionmentioning

confidence: 99%

A study of effects on economic indicators for different heat source temperature on thermal storage‐based solar organic Rankine cycle system

Baral

2020

Engineering Reports

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The solar organic Rankine cycle (ORC) system for power generation with thermal storage type may be one of the promising technologies for prolonging power generation. The thermal storage type of solar ORC system is feasible for investment due to higher power production. In addition, the heat source temperature of the ORC system plays an important role in the investment. The main aim of the study is to investigate the solar ORC with thermal storage systems from the thermoeconomic point of view. The paper provides recommendations for a suitable class of investment in which an ORC system can be economically feasible.Besides, the economics and thermoeconomic analysis is carried out in order to find the cost of electricity production from the solar ORC under various solar source temperatures. The cost of electricity generation is found to be in the range of $0.2/kWh to $0.6/kWh for 120 • C and 90 • C, respectively. For analysis, different financial scenarios are developed based on the total cost of the solar ORC units. The economic parameters, such as payback period, internal rate of return (IRR) and specific investment cost, are calculated. The payback period is found to be less than 6 years for the thermal storage type of solar ORC system with the IRR to be 15%. This shows that the investment is feasible for medium and large scale solar ORC with thermal storage systems.

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“…The solar thermal systems have been efficiently coupled with direct biomass-fired GT system [27,28], Rankine cycle [29] as well as with absorption cooling cycles [22][23][24][25]. Many works have been carried out on biomass-based combined power and cooling system and also biomass-based tri-generation system [4,7].…”

Section: Introductionmentioning

confidence: 99%

Thermo-economic assessment of a hybrid tri-generation system making simultaneous use of biomass and solar energy

Chattopadhyay

Ghosh

2020

J Braz. Soc. Mech. Sci. Eng.

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In this work, a tri-generation system is proposed that relies on a biomass-gasification-based externally fired gas turbine (EFGT) generator and an array of solar flat-plate collectors. A LiBr-water-based absorption cooling (VAR) system utilizes the waste heat of a 100-kW power generator as well as solar thermal energy of a 200 sq. m. solar collector to run a vegetable cold store of 200 metric ton capacity. A domestic water-heating system is also integrated with the unit that recovers low-temperature thermal energy to produce 150 tons of hot water daily. The power generator shows its maximum electrical efficiency of 27.5% at 1100 °C turbine inlet temperature and 10 pressure ratio. The maximum efficiency of solar collector is found to be 48%. The overall energetic efficiency of the tri-generation system varies in the range of 59 to 76%, while the overall exergetic efficiency varies in the range of 19 to 26.5%. The components of EFGT generator show high exergetic efficiencies, about 93% for air compressor and about 90% for GT, whereas the solar thermal system shows the poor exergetic performance of about 17%. Based on economic analysis of the proposed plant, the effective price of electricity is estimated as 0.068 USD/kWh without any subsidy, but considering 50% capital subsidy the price is estimated as 0.04 USD/kWh. The discounted payback period is found to be 10.8 years without any capital subsidy, but when 50% subsidy is considered, the payback period is reduced to 5 years.

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Biomass retrofit for existing solar organic Rankine cycle power plants: Conceptual hybridization strategy and techno-economic assessment

Cited by 43 publications

References 39 publications

Modified auxiliary exergy costing in advanced exergoeconomic analysis applied to a hybrid solar-biomass organic Rankine cycle plant

Modified auxiliary exergy costing in advanced exergoeconomic analysis applied to a hybrid solar-biomass organic Rankine cycle plant

A study of effects on economic indicators for different heat source temperature on thermal storage‐based solar organic Rankine cycle system

Thermo-economic assessment of a hybrid tri-generation system making simultaneous use of biomass and solar energy

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