The present work proposes an advanced small scale Combined Heat and Power (CHP) Rankine cycle plant, conceived for a fully renewable energy sources (RES) power input. The steam generator system has been defined with the design target of constant CHP outputs. This is made possible by combining modular parabolic trough solar technology, equipped with concrete thermal storage, and a biomass fed furnace compensates the solar field hot thermal fluid flow (HTF) drop related to the solar radiation changes. The Rankine cycle electric power output is given by a reciprocating steam engine, while the thermal power output is collected at the condenser. The power plant design and its operating behaviour have been modelled and investigated by using transient simulations with an hourly distribution data during a one-year period and climate data have been referred to the latitude of Rome. Furthermore, the assessment of the proposed RES power technology has been carried out by comparing its energy and environmental performance against solar-alone or biomass-alone plants of identical power outputs. The main objective is to evaluate the effectiveness of the solar-biomass combination against the solar-alone and the biomassalone configurations. The combined CHP plant has been designed to supply an output power share of 14% electric and 86% thermal, with the possibility to use the latter either for heating or cooling purposes. When compared to the biomass-alone solution, the combined CHP plant was found to gain 14,1% saving in biomass consumption. While with respect to the solar-alone plant, keeping constant power outputs, it is found that the solar field foot-print was reduced by a factor 1:7.75. The above findings confirm the effectiveness of solar-biomass combination in terms of powerdensity pay-off for small size CHP concepts. © 2009 by ABCM.
A combined solar-biomass Rankine cycle concept for micro-cogeneration / Borello, Domenico; Corsini, Alessandro; Rispoli, Franco; Tortora, Eileen. - ELETTRONICO. - (2009), pp. 1203-1212. (Intervento presentato al convegno 22nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems tenutosi a Foz du Iguacu; Brazil nel August 31st - September 3rd, 2009).
A combined solar-biomass Rankine cycle concept for micro-cogeneration
BORELLO, Domenico;CORSINI, Alessandro;RISPOLI, Franco;TORTORA, EILEEN
2009
Abstract
The present work proposes an advanced small scale Combined Heat and Power (CHP) Rankine cycle plant, conceived for a fully renewable energy sources (RES) power input. The steam generator system has been defined with the design target of constant CHP outputs. This is made possible by combining modular parabolic trough solar technology, equipped with concrete thermal storage, and a biomass fed furnace compensates the solar field hot thermal fluid flow (HTF) drop related to the solar radiation changes. The Rankine cycle electric power output is given by a reciprocating steam engine, while the thermal power output is collected at the condenser. The power plant design and its operating behaviour have been modelled and investigated by using transient simulations with an hourly distribution data during a one-year period and climate data have been referred to the latitude of Rome. Furthermore, the assessment of the proposed RES power technology has been carried out by comparing its energy and environmental performance against solar-alone or biomass-alone plants of identical power outputs. The main objective is to evaluate the effectiveness of the solar-biomass combination against the solar-alone and the biomassalone configurations. The combined CHP plant has been designed to supply an output power share of 14% electric and 86% thermal, with the possibility to use the latter either for heating or cooling purposes. When compared to the biomass-alone solution, the combined CHP plant was found to gain 14,1% saving in biomass consumption. While with respect to the solar-alone plant, keeping constant power outputs, it is found that the solar field foot-print was reduced by a factor 1:7.75. The above findings confirm the effectiveness of solar-biomass combination in terms of powerdensity pay-off for small size CHP concepts. © 2009 by ABCM.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.