F R A U N H O F E R - I N S T I T U T F Ü R U m w E lT- , S I c H E R H E I T S - U N d E N E R g I E T E c H N I k U m S I c H T

I N S T I T U T S T E I l S U l z b A c H - R O S E N b E R g

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Keywords

• Thermalstoragematerials

• Analysesforcyclestabilityandheat

capacity

• Fluctuatingthermaldischarge

• Fluegaspurification

• Processdevelopment

• Thermaldischargeutilisationconcepts

Sectors

• Chemicalindustry

•Metalandglassindustry

•Wasteincinerationplants

• Biomasspowerstations

• Constructionofcombinedheatand

powerplants

• Refrigeratingplantconstruction

• Energygeneratorsandconsumers

•Manufacturingsector

Fraunhofer Institute for

Environmental, Safety and Energy

Technology UMSICHT

Institute Branch

Sulzbach-Rosenberg

AnderMaxhütte1

92237Sulzbach-Rosenberg

Contact person

PaulMichaelRundel

Energytechnology

Telephone+499661908-437

paul.michael.rundel@umsicht.fraunhofer.de

Director

Prof.Dr.AndreasHornung

Telephone+499661908-403

andreas.hornung@umsicht.fraunhofer.de

www.umsicht-suro.fraunhofer.de

www.umsicht.fraunhofer.de

1 Demonstration scale fixed-bed

heat storage unit for the investiga-

tion of dust exposure effects.

Dependentontheprocess,wasteheatis

oftenproducednotonaconstant,but

onafluctuatinglevel.Especiallyinenergy

intensiveindustrialsectors,considerable

amountsofwasteheatwithapotentially

usabletemperaturelevelareproduced.

Newinnovativeconceptsenablethecon-

versionofthiswasteheattohigh-quality

processenergy,therebyincreasingthe

overallenergyefficiency.

Thermalstorageunitsmakeuseofboth

sensitiveheatandthephasechangeenergy

ofselectedmaterials.Theyareherebyable

toproduceatemporaldecoupledand

constantheatflowforvaryingdurations,

therebymatchingheatsupplyrequirements

ofprocesses.Theheatflowgeneratedby

thestoragesystemcanforexamplebe

usedforthegenerationofprocesssteamor

forpowergenerationinacombinedheat

andpowerprocess.

THERMAL STORAGE UNIT CONVERSIONOFWASTEHEATTOHIGH-QUALITYPROCESSENERGY

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F R A U N H O F E R I N S T I T U T E F O R E N V I R O N M E N TA L , S A F E T Y A N D E N E R G Y T E C H N O L O G Y U M S I C H T

I N S T I T U T E B R A N C H S U L Z B A C H - R O S E N B E R G

1

09/1

3

Aftertheselectionofasuitedstorage

material,surveysregardingthelong-term

stabilityandloadingand/ordischargeare

carriedoutatthedemonstrationcenter

ofFraunhoferUMSICHT.Itispossibleto

simulateheatflowswithtemporaltempe-

raturevariationsandvaryingdustloadin

ordertorepresenttheapplicationcaseas

application-orientedaspossible.Anintense

supportandevaluationofthemeasure-

mentdataallowsforthedeterminationof

theoptimumoperationparametersforyour

wasteheatutilisationconceptwhichwe

willsupportduringitsimplementation.

Your benefits

FraunhoferUMSICHTlooksbackonmany

yearsofexpertiseintheareaofthermal

energystorageanditsapplicationinthe

processes.Indifferentpilotplants,bulk

materialsandPCMwereinvestigated

concerningtheirphysicalcharacteristicsas

thermalstorageunits.Atthesametime,

thefunctionofthefluegaspurificationwas

analysedandverifiedforthebulkmaterial

storageunits.Moreover,thermo-chemical

storagematerialsarealsopartofthe

portfolioofFraunhoferUMSICHT.

Thermal storage units concept

• Definitionoftheapplicationcase

• Identificationandassessmentofnew

materialsystemsforheatstorage

• Testofstoragemedia(phasechange

material,bulkmaterials)

• Analysesregardinglong-termstability

andrateofefficiency

• Trialsinthetechnicalcenterwithash/

dust-loadedexhaustgases

•Measurementserieswithfluctuating

wasteheatflows

• Verificationofpotentialoptimisation

measures

Our service

Inaccordancewithyourapplication,

FraunhoferUMSICHTanalysesthe

occurringphysicalstressofthelatentor

sensitivestoragematerial–suchasthedust

loadinexhaustgas–anddefinescertain

minimumrequirementsforthesystem.

Relevantparametersare,forexample,

theloadingtemperatureandnumberof

cycles.Basedonthedefinedrequirements

profile,potentialstoragematerialsare

definedandinformationregardingthe

availabilityandpricelevelofthesubstances

aredetermined.

1 Demonstration center Fraunhofer

UMSICHT Institute branch Sulzbach-

Rosenberg.

2 High-temperature storage material.

3 Sodium acetate trihydrate with solid-

liquid phase transition for storage of

latent heat.

1

2 Alumin ium ox ide Volcan ic rock

3

Generation of a continuous and need-based load profile

Thermal energy storage

In-process useConversion into electricity / CHP

Refrigeration Local-/ District heating

Heat sink

Useful heat

Load profile of waste heat before storage

Q

t

QMax

QMin

Q

t

QMax

QMin

Load profile of waste heat after storage

QMittel

t

Q

Industrial process

Heat source

Steam Water Thermal oil Exhaustair