Exergetic and exergoeconomic analysis of a novel hybrid solar-geothermal polygeneration system producing energy and water

摘要: Abstract A dynamic simulation model of a novel solar–geothermal polygeneration system and the related exergetic exergoeconomic analyses are presented in this paper. The plant is designed order to supply electrical, thermal cooling energy fresh water for small community, connected district heating network. hybrid equipped with an Organic Rankine Cycle fueled by medium-enthalpy geothermal Parabolic Trough Collector solar field. Geothermal brine also used space purposes. Finally, fluid supplies heat Multi-Effect Distillation unit, producing desalinized from seawater. Dynamic simulations were performed design system. overall model, implemented TRNSYS environment, includes detailed algorithms components. Detailed control strategies included properly manage An analysis implemented. allows identify all aspects that affect global exergy efficiency, suggest possible enhancements. accounting costs aims at establishing monetary value material flows, then providing reasonable basis price allocation. applied integral values comparison results between summer winter season performed. Results analyzed on different time bases presenting energetic, exergetic, economic performance data. show efficiency varies 40% 50% during “Thermal Recovery Mode” operation 16% 20% “Cooling mode” operation. It was found electricity, chilled water, desalinated vary respectively ranges 0.1475–0.1722 €/kW h, 0.1863–0.1888 €/kW hex, 0.01612–0.01702 €/kW hex 0.5695–0.6023 €/kW hex.