Solar Thermal Energy Storage System

Simple item page
dc.date.accessioned2020-08-11T13:44:15Z
dc.date.available2020-08-11T13:44:15Z
dc.date.issued2019
dc.identifierdoi:10.17170/kobra-202008051532
dc.identifier.isbn978-3-7376-0635-6 (e-bbok)
dc.identifier.urihttp://hdl.handle.net/123456789/11679
dc.language.isoengeng
dc.publisherkassel university press
dc.publisher.placeKassel
dc.relation.isbn978-3-7376-0634-9 (print)
dc.relation.uriurn:nbn:de:0002-406353
dc.rightsNamensnennung - Weitergabe unter gleichen Bedingungen 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-sa/4.0/*
dc.subjectlatent heat storageeng
dc.subjectMannitoleng
dc.subjectcomputational fluid dynamicseng
dc.subjectScheffler reflectoreng
dc.subjectsolar heat receivereng
dc.subject.ddc620
dc.subject.swdSonnenenergieger
dc.subject.swdLatentwärmespeicherger
dc.subject.swdMannitger
dc.subject.swdReflektor <Lichttechnik>ger
dc.subject.swdSonnenkollektorger
dc.titleSolar Thermal Energy Storage Systemeng
dc.title.subtitleusing phase change material for uninterrupted on-farm agricultural processing and value additioneng
dc.typeWorking paper
dc.type.versionpublishedVersion
dcterms.abstractThermal energy storage technologies are gaining attention nowadays for uninterrupted supply of solar power in off-sunshine hours. An indigenized solar phase change material (PCM) system was developed and performance evaluated in the current study to efficiently store solar thermal power using a latent heat storage approach, which can be utilized in any subsequent decentralized food processing application. A 2.5 m2 laying Scheffler reflector is used to precisely focus the incoming direct normal irradiance (DNI) on a casted aluminum heat receiver (220 mm diameter) from where this concentrated heat energy is absorbed and conducted to the PCM unit by the flow of thermal oil (Fragoltherm-32 thermo-oil). During the circulation around PCM pipes inside the PCM unit, thermal oil discharges heat energy to the PCM, which undergoes change of phase from solid to liquid. Computational fluid dynamics (CFD) analysis of the PCM unit were also performed according to the actual boundary conditions, which gave satisfactory results in terms of temperature and velocity distribution. With an average DNI of 781 W/m2, the highest temperature of the receiver surface during the trials was observed at about 155 C that produces thermal oil at 110°C inside the receiver and around 48°C of PCM in the PCM unit. The heat energy losses per unit time (W) due to the lack of reflectivity from the Scheffler reflector, out-of-focus radiations at the targeted area, absorptivity of heat receiver, piping system losses, and cylinder losses (in the form of conduction, convection, and radiations using 50 mm insulation thickness) were found to be 110 W (10 %), 99 W (9 %), 89 W (8 %), 128 W (12 %), 161 W (15 %), and 89 W (8 %), respectively. These findings of CFD analysis and mathematical modeling were also consistent with real-time data, which was logged through an online Control and Monitoring Interface portal. The final energy available to the PCM was 414W with an overall system efficiency of 38 %, which can be improved by decreasing thermal losses of the system and using other PCM materials.eng
dcterms.accessRightsopen access
dcterms.creatorMunir, Anjum
dcterms.creatorHensel, Oliver
dcterms.extent45 Seiten
dcterms.isPartOfICDD Working Papers ;; No. 26
dcterms.source.seriesICDD Working Papers
dcterms.source.volumeNo. 26
kup.institutionFB 11 / Ökologische Agrarwissenschaften
kup.institutionFB 14 / Bauingenieur- und Umweltingenieurwesen
kup.iskuptrue
kup.seriesICDD Working Papers
kup.subjectNaturwissenschaft, Technik, Informatik, Medizin
kup.typMonographie

Files

Original bundle

Now showing 1 - 2 of 2
Thumbnail Image
Name:
kup_9783737606356.pdf
Size:
18.66 MB
Format:
Adobe Portable Document Format
Description:
Download
No Thumbnail Available
Name:
orig_9783737606356.pdf
Size:
18.71 MB
Format:
Adobe Portable Document Format
Description:
Download

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
3.03 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

kup - kassel university press