elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Power generation based on the Ca(OH)2/ CaO thermochemical storage system – Experimental investigation of discharge operation modes in lab scale and corresponding conceptual process design

Schmidt, Matthias and Linder, Marc Philipp (2017) Power generation based on the Ca(OH)2/ CaO thermochemical storage system – Experimental investigation of discharge operation modes in lab scale and corresponding conceptual process design. Applied Energy (203), pp. 594-607. Elsevier. DOI: 10.1016/j.apenergy.2017.06.063 ISSN 0306-2619

[img] PDF
69MB

Official URL: http://www.sciencedirect.com/science/article/pii/S0306261917308127

Abstract

Thermochemical storage systems offer in theory promising advantages for a wide range of applications. In particular the reversible reaction of calcium hydroxide to calcium oxide and water vapour is intensively discussed as an alternative storage solution for concentrated solar power plants. The material is cheap, environmentally friendly and discharge temperatures of the reaction of 600°C and above fit to the operating range of today’s power plants. However, experimental data on the operation of the system in lab scale and at load conditions comparable to the real application is rarely reported. Therefore the thermal discharge of the reaction system at vapour pressures between 4 and 470kPa and temperatures between 280 and 600°C is experimentally investigated in this study. In particular the influence of the cooling load at various vapour pressures on the achievable discharge temperatures is analysed. The presented data complements the experimental characterisation of the reaction system in the complete temperature and pressure range which is relevant for real process applications. Based on this knowledge the applicability of the storage for various processes can now be assessed more accurate. By means of the experimental results a first integration option of the thermochemical system in a CSP plant is proposed in this work and thermodynamically analysed. The analysis revealed that, when the required steam production during discharge is thermally integrated into the Rankine steam cycle, a high storage efficiency of up to 87% can be reached compared to only 60% in the reference case.

Item URL in elib:https://elib.dlr.de/113424/
Document Type:Article
Title:Power generation based on the Ca(OH)2/ CaO thermochemical storage system – Experimental investigation of discharge operation modes in lab scale and corresponding conceptual process design
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmidt, MatthiasMatthias.Schmidt (at) dlr.deUNSPECIFIED
Linder, Marc PhilippMarc.Linder (at) dlr.deUNSPECIFIED
Date:October 2017
Journal or Publication Title:Applied Energy
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.apenergy.2017.06.063
Page Range:pp. 594-607
Publisher:Elsevier
ISSN:0306-2619
Status:Published
Keywords:Thermochemical energy storage Calcium hydroxide/ oxide Thermal discharge operation modes High vapour pressures Power generation Storage efficiency
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Thermal Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Thermochemical Processes (Storage)
Location: Köln-Porz
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Schmidt, Matthias
Deposited On:26 Jul 2017 09:35
Last Modified:06 Sep 2019 15:21

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.