mj2412 seu through tes feb 3 2010

7/27/2019 MJ2412 SEU Through TES Feb 3 2010

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integrated thermal energy storage

Viktoria Martin, Ph.D.

Renewable Energy Technology Advanced Course, 2010

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pp ca ons or ens e eyon o wa er s orage ,Latent Heat TES, and using Chemical Reactions

Underground Thermal Energy Storage

Storage in District Energy Systems

Storage for Solar Thermal Power

Overheating in the Greenhouse Sector

etc

2Department of Energy Technology


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Thermal Energy Storage the Hunt forNe awatt hours

The IEA has recently identifiedthe cost of CO2 reductions forvarious measures working onend-use efficiency is estimated toactuall have a ne ative cost!

Thermal Energy Storage (TES) isthe storage of heat and/or cold. It

s a ey componen or en -useefficiency.

TES enables the Rational Use of

EnergyMinimize part load operation of

e ui ment for heatin and coolin . From the IEA 2008 Ener Technolo Pers ectives

Peak Shaving in the Electrical EnergySystem

Increased use of natural sources for

TES facilitates DistributedCo eneration of Power Heat and

heating and cooling, e.g. storenighttime cold for use duringdaytime.

Cold

TES enables increased use of

storage as well as seasonalstorage.


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Underground Thermal EnergyStorage (UTES)

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IEA/ECES Annex 14 State-of-the-Art Report


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A lar e invisible isolated stora e volume.

For seasonal or daily storage applications.

Aquifer Thermal Energy Storage (ATES)

.

possibilities for large, invisible storage with high capacity and

power properties.,

level.

Borehole Thermal Energy Storage (BTES)

single plastic u-tube with circulating heat transferred fluid(glycol solution)

means that the conductivity of the ground, and groundwater flow around the borehole site are important.

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response.


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IEA/ECES Annex 14 State-of-the-Art Report


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BTES Systems example:

Karlstad

Photo: Sweco FFNS

101 boreholes

Geotech120 m deep5.5 m apart

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,

seasonal storage of solar heat

50 single family homes

summer: storing excess heat in the ground

winter: heating wo heat pumpore o es, m eep

Solar fraction: 70%Source: Prof. Hellstrm, Lund University

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Hot Water Storage in DistrictHeating Systems

Contacts:

[email protected]

[email protected]

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Vxj Energi AB, 40000 m3, 2700 MWh heat


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s r c oo ng e wor oc o m

ree- oo ng rom e a cSea

Waste Cooling from Electrical

Heat Pum s300 MW

380 GWh/yearConventional Compression

Chillers

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District Cooling Storage Hornsberg, Stockholm

5 C water pumped Cold water

through a heatexchanger and cool

the DC network

e vere to t e eman .

Because of cold TES, more

customers can be connected.

District

Cooling Net

Heat

Exchanger

Mechanical chillers make sure that

o

www.fortum.se

the water temperature is stable.

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Contact person: [email protected]


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Snow Storage CoolingSundsvall Hospital

Contact: K ell.sko sber snow ower.se

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Storage for Solar ThermalPower Necessar for continuous o eration alternativel for ra id

start-up in the morning. Molten salt (sensible heat storage only)

Sensible storage in solid material (Sand, Concrete etc)

Emerging technology:High Temp. PCM storage

Chemical reactions

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Sou r c e : NREL , USA


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Storage in Solar ThermalPower Applications

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W a r e r k a r e t a l ., I EA / ECES A n n e x 1 8 4 t h W o r k s h o p

w w w .w e b f o r u m . co m / a n n ex 1 8


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Solar Power with molten saltstorage

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So u r c e : Sa n d i a N a t i o n a l L ab o r a t o r y


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Advanced TES fortransportation

reeoptions Chemical ReactionsHeat of Reaction

orpt onTransporting dry sorbent.

Heat is discharged as water

PCMMaking use of the heat

involved in phase changevapor s a sor e on

surfaceprocess of suitable material,

like sodium acetate.


Ny Teknik, May 2007


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Energy Transportation using

advanced TES-technology.

10 MWh/m3 cost-effective!

Regional (~ 1000 km) transportation ofbiomass 0.8-3 MWh/m cost-effective!

Local transportation of heat ( order of 10 3 -effective!

So, with TES technology 200W m t s ou e poss e to

reach cost-effective transportation ofwaste heat for some distance!



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Feasibility Study Mobile TESin District Heating System

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Weilong Wang, Mlardalen University, 2009


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-

TABLE37MELTINGTEMPERATURE AN DSTORAGECAPACITYOF TH EINVESTIGATEDPC MS

PCMChoice

, 3 2

MeltingTemp.[C] 58 89 120

TransportedHeat(45

120C)pertransport

[MWh]

4.3 3.3 4.5

a en ea

[kWh/tonne]

Martin et al IEA/ECES Annex 18 2010

Alfred Schneider Conce t

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Ulriksdals Castle will make use of itsown reen ouse E ect

Seasonal store of summertime

excess heat in Greenhouse

A greenhouse typically collects 3

t mes ts own annua energy

consumption.

Case study: Slottstrdgrden

Ulriksdal and Royal Castle in the

area:

There is theoretically enough

excess to also heat the castle


fl l d hfl l d hfl l d hfl l d h


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Energy flows closed greenhouseEnergy flows closed greenhouseEnergy flows closed greenhouseEnergy flows closed greenhouse

Aart Snijders, If Technology, Annex 22 preliminary Workshop, Ankara, 2007


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Solar Thermal Cooling withBuilt-in Storage Function

condenser/(evaporator)

Heat of condensation

Vapor

Reactor

as e ea

Supply

Salt t rap/

crystals

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. .


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Thermal Energy Storage Concepts exists,

wSensible storage being commercially available,-

PCM-technology being a merging technology,

close to commercial9Material development needed

9 System Integration Know-How needed

Chemical Reactions at basic research stage with afew systems being close to commercial (e.g.,

matewe or coo ng

As an Energy Engineer, consider the

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mj2412 seu through tes feb 3 2010

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