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Author:Aspelund, Benjam
Title:Keskitetty lämmöntuotanto: Parantamismahdollisuudet ja lämpöverkon simulointi
Centralized heat production; Enchancing possibilities and heat network simulation
Publication type:Master's thesis
Publication year:2010
Pages:84 s. + liitt. 17      Language:   fin
Department/School:Energiatekniikan laitos
Main subject:Energiatalous ja voimalaitostekniikka   (Ene-59)
Supervisor:Lahdelma, Risto
Instructor:Liukkonen, Erkki
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
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In the closed network of Learning Centre you can read digital and digitized theses not available in the open network.

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Location:P1 Ark Aalto  4826   | Archive
Keywords:district heating
rationalizing
fluid-flow simulation
kaukolämmitys
aluelämmitys
toiminnan tehostaminen
virtaussimulointi
Abstract (eng): In this thesis the means of improving small and big scale district heating networks were enlarged on.
The research part of the thesis centralized on a small district heating network of Vivamo in Lohja.
The network was modelled with a fluid-flow simulation program.
The results were used to enforce the improving possibilities in the Vivamo's network.

Enhancing possibilities discussed were heat storage systems, demand side management, throttling to reduce pressure differences and improving the equipment on the district heating substations.
Also means of reducing operating temperatures were under discussion.

In the Vivamo network, different flowing situations were modelled with a static flow simulation program.
The network's flowing conditions were evaluated on differing outside temperature levels.
The results showed that at least in two of the networks branches, throttling was advisable.
Also the water of the network could be circulated using a significantly lower temperature curve.
Abstract (fin): Tässä diplomityössä on käyty läpi keinoja keskitetyn lämmöntuotannon toiminnan kehittämiseksi ja energiatehokkuuden parantamiseksi verkon omistajan kannalta.
Työn tutkimusosassa on tietokoneavusteisesti mallinnettu Lohjalla sijaitsevan Vivamon aluelämpöverkon ensiöpuolta.
Simulointitulosten perusteella verkkoon on tehty kehittämisehdotukset toiminnan tehostamiseksi.

Säästöä keskitetyssä lämmöntuotannossa todettiin olevan saatavissa mm. lämmön varastoinnilla, kulutuksen ohjauksella, paikallisella paine-eron alennuksella kuristusventtiilien avulla, sekä kuluttajapään asiakaslaitteiden tarkkuutta ja säätöä parantamalla.
Myös pumppauskustannusten ja kiertoveden lämpötilatasojen kautta säästöpotentiaalia on olemassa huomattavasti.

Tutkittavassa aluelämpöverkossa käytiin staattisella virtaussimulointiohjelmalla eri ulkolämpötilatasojen mukaisia lämmönkulutustilanteita läpi etsien painetasapainoa, sekä optimaalista menoveden lämpötilaa.
Huomattiin, että ainakin kahdessa verkon haarassa paine-eroa kannattaa alentaa kuristamalla läpi vuoden.
Menovedelle löydettiin myös uudet, edeltävää matalammat lämpötilatasot.
ED:2010-10-15
INSSI record number: 41088
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