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Hybrid Solar and Coal-Fired Steam Power Plant with Air Preheating Using a Solid Particle Receiver

Prosin, Tobias and Pryor, Trevor and Creagh, Christine and Amsbeck, Lars and Buck, Reiner (2014) Hybrid Solar and Coal-Fired Steam Power Plant with Air Preheating Using a Solid Particle Receiver. Solar2014: The 52nd Annual Conference of the Australia Solar Council, Australia.

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Abstract

Fuel reduction has been achieved for coal power stations by hybridisation with solar thermal systems. Current technology uses feedwater or turbine bleed steam (TBS) heating with linear Fresnel based concentrated solar power (CSP) fields. The low temperature heat produced by these systems results in low solar to power conversion efficiency and very low annual solar shares. In this paper the technical advantages of solarising coal fired power plants using preheated air by a novel CSP system based on a solid particle receiver (SPR) are examined. This system is compared to the current deployed state-of-the-art coal plant solarisation by modelling the systems and analysing the thermodynamic heat and mass balance of the steam cycle and coal boiler using EBSILON®Professional software. Annual performance simulation tools are also used to calculate the performance of the solarisation technologies. Solarisation using SPR technology for preheating air in solar-coal hybrid power stations has the potential to considerably increase the solar share of the energy input by 28% points at design point and improve the annual fuel reduction from 0.7% fuel saved to 20% over the year. This is a significant reduction in fossil fuel requirements and resulting emissions. These benefits are a result of SPR solar system’s higher operating temperature and integrated thermal storage, which also allow a buffered response time for handling transients in the intermittent solar resource. Analysis indicates air-solarisation of coal plants can enable 81% higher solar to electric conversion efficiency than currently existing solar hybridisation option. Thus, the cost of the thermal energy generated by Fresnel based TBS solarisation must be up to 38% lower than thermal energy generation of secondary air preheating SPR system for economic parity between the options. Initial calculations indicate that the required thermal energy cost levels for SPR systems for this application are already achievable.

Item URL in elib:https://elib.dlr.de/92088/
Document Type:Conference or Workshop Item (Speech)
Title:Hybrid Solar and Coal-Fired Steam Power Plant with Air Preheating Using a Solid Particle Receiver
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Prosin, TobiasMurdoch University, Perth, WA, 6150, AustraliaUNSPECIFIED
Pryor, TrevorMurdoch University, Perth, WA, 6150, AustraliaUNSPECIFIED
Creagh, ChristineMurdoch University, Perth, WA, 6150, AustraliaUNSPECIFIED
Amsbeck, Larslars.amsbeck (at) dlr.deUNSPECIFIED
Buck, Reinerreiner.buck (at) dlr.deUNSPECIFIED
Date:2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:CSP, hybrid, particle receiver, coal, tower
Event Title:Solar2014: The 52nd Annual Conference of the Australia Solar Council
Event Location:Australia
Event Type:international Conference
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Systems (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Point-Focusing Systems (old)
Location: Stuttgart
Institutes and Institutions:Institute of Solar Research > Punktfokussierende Systeme
Deposited By: Uhlig, Tamara
Deposited On:19 Nov 2014 14:21
Last Modified:19 Nov 2014 14:21

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