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ANALYSIS OF OPERATION TEST RESULTS OF A HIGH TEMPERATURE PHASE CHANGE STORAGE FOR PARABOLIC TROUGH POWER PLANTS WITH DIRECT STEAM GENERATION

Laing, Doerte und Eck, Markus und Hempel, Matthias und Steinmann, Wolf-Dieter und Meyer-Grünefeldt, Mirko und Eickhoff, Martin (2012) ANALYSIS OF OPERATION TEST RESULTS OF A HIGH TEMPERATURE PHASE CHANGE STORAGE FOR PARABOLIC TROUGH POWER PLANTS WITH DIRECT STEAM GENERATION. ASME 2012 6th International Conference on Energy Sustainability, 2012-07-23 - 2012-07-26, San Diego, USA. doi: 10.1115/ES2012-91056.

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Kurzfassung

For future parabolic trough plants direct steam generation in the receiver pipes is a promising option for reducing the costs of solar thermal energy [1]. These new solar thermal power plants require innovative storage concepts, where the two phase heat transfer fluid poses a major challenge [2]. For the regions where the heat transfer fluid is in a single phase (water or steam), sensible heat storage using molten salt [3] or concrete [4] as storage material can be applied. However, efficient energy storage in the two-phase evaporation/condensation region requires heat storage operation within a narrow temperature range. For this two phase region, a high performance PCM storage technology was developed and demonstrated by DLR. A test module using 14 tons of PCM with 700 kWh capacity was built in 2009 and commissioned in 2010 in a direct steam test loop, set up at the power plant Litoral of Endesa in Carboneras, Spain [5]. The PCM-storage uses Sodium nitrate as phase change material with a melting temperature of 305 °C. Cycle testing has started end of 2010. Cycling tests have proven the expected discharge capacity of approx. 700 kWh for the PCM-storage module. System operation in constant pressure mode and sliding pressure mode has been conducted for the PCM-storage. While in the constant pressure mode a peak performance of the storage of more than 700 kW could be demonstrated, in the sliding pressure mode a constant power output over almost the whole charge and discharge period could be provided. The paper discusses the test results and evaluation for different operation modes for the phase change storage for discharge operation. Charging of the phase change storage is always in a once-through mode. However, for discharge, the steam can be generated either in forced or natural circulation mode or in once-through mode, leading to very different effects for the two-phase flow and filling level inside the heat exchanger pipes in the storage. The effects for forced and natural circulation discharge will be analysed and described in the paper.

elib-URL des Eintrags:https://elib.dlr.de/79659/
Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:ANALYSIS OF OPERATION TEST RESULTS OF A HIGH TEMPERATURE PHASE CHANGE STORAGE FOR PARABOLIC TROUGH POWER PLANTS WITH DIRECT STEAM GENERATION
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Laing, Doertedoerte.laing (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Eck, Markusmarkus.eck (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Hempel, Matthiasmatthias.hempel (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Steinmann, Wolf-Dieterwolf.steinmann (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Meyer-Grünefeldt, Mirkomirko.meyer-gruenefeldt (at) dlr.dehttps://orcid.org/0000-0003-4124-3482NICHT SPEZIFIZIERT
Eickhoff, Martinmartin.eickhoff (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:Juli 2012
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
DOI:10.1115/ES2012-91056
Status:veröffentlicht
Stichwörter:Thermal Energy Storage, Phase Change Material, Concrete, Parabolic Trough Power Plant, Direct Steam Generation, Testing, Operation Mode, Forced Circulation, Natural Circulation
Veranstaltungstitel:ASME 2012 6th International Conference on Energy Sustainability
Veranstaltungsort:San Diego, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:23 Juli 2012
Veranstaltungsende:26 Juli 2012
Veranstalter :ASME
HGF - Forschungsbereich:Energie
HGF - Programm:Rationelle Energieumwandlung und Nutzung (alt)
HGF - Programmthema:Energieeffiziente Prozesse (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E EV - Energieverfahrenstechnik
DLR - Teilgebiet (Projekt, Vorhaben):E - Thermochemische Prozesse (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Thermodynamik > Thermische Prozesstechnik
Hinterlegt von: Laing, Dörte
Hinterlegt am:18 Dez 2012 17:45
Letzte Änderung:24 Apr 2024 19:46

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