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Author:Sillman, Jouni
Title:Betonielementtikerrostalojen linjasaneerauksen hankesuunnitelman energiansäästölaskennan ja raportin kehittäminen
Development of an energy savings calculation model and the reporting of project planning for pipeline renovations in precast concrete apartment blocks
Publication type:Master's thesis
Publication year:2013
Pages:83 + [8]      Language:   fin
Department/School:Energiatekniikan laitos
Main subject:Energiatalous ja voimalaitostekniikka   (Ene-59)
Supervisor:Lahdelma, Risto
Instructor:Karves, Kim
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
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Location:P1 Ark Aalto  5947   | Archive
Keywords:energy efficiency
building renovation
investment cost based feasibility
line renovation
precast concrete apartment blocks
project planning
energiatehokkuus
korjausrakentaminen
investointien kannattavuus
linjasaneeraus
betonielementtikerrostalo
hankesuunnitelma
Abstract (eng): The objective of this thesis was to develop an effective and easy to use calculation model to evaluate a building's energy consumption before and after an energy renovation.
The model is based on the National Building Code of Finland D5 2012.
The model enables the simulation of a building with few initial parameters but also generates more precise results when additional input data are provided.

Investment cost based feasibility calculations were implemented into the calculation model.
Different measures promoting energy efficiency were compared with internal rate of return and breakeven point.
The required rate of return, inflation, maintenance costs and the change in energy prices can all be taken into account.
The measures promoting energy efficiency can also be put together as a group of actions and the feasibility of the whole project can be evaluated.

Housing company Pietarinkatu 12 was modelled with the developed calculation model and different renovation measures were evaluated.
Modelling of the current energy consumption gave results very close to the actual measured consumption.
Also the results for evaluating different energy renovation measures were found acceptable.
When calculating feasibilities, the most significant uncertainty factor was found to be the lack of extensive initial information regarding investment costs.
For this purpose a renovation work cost monitoring tool was built.

The developed energy savings calculation model as well as the feasibility calculations was found accurate and fast to use in project planning for pipeline renovations.
However the absolute accuracy of the results is essentially bound to the quality and quantity of the initial information.
Three differently scoped energy renovation report models were outlined for further development.
Abstract (fin): Tässä selvityksessä tavoitteena oli luoda tehokas ja helppokäyttöinen laskentatyökalu, jolla voidaan tarvittavalla tarkkuudella laskea rakennuksen nykyinen ja energiakorjauksen jälkeinen energiankulutus.
Laskentamalli perustuu rakentamismääräyskokoelman D5 2012 osaan.
Malli mahdollistaa rakennuksen mallinnuksen hyvin suppeilla lähtötiedoilla, mutta laajentamalla lähtötietoja voidaan saatavaa tulosta huomattavasti tarkentaa.

Samaan laskentatyökaluun toteutettiin energiakorjausten investointien kannattavuuden vertailu.
Lähtötietoina käytetään laskettua energiankulutuksen muutosta ja arvioitua investointikustannuksia.
Vertailu perustuu sisäisen koron ja korollisen takaisinmaksuajan vertaamiseen.
Vertailussa voidaan muokata tuottovaatimusta, inflaatiota ja energian hinnan nousua.
Huomioon voidaan ottaa myös ylläpitokustannukset, sekä yhdistää eri järjestelmien investoinnit yhteen ja tarkastella yhdistetyn kokonaisuuden kannattavuutta.

As Oy Pietarinkatu 12:a mallinnettiin luodulla laskentatyökalulla ja eri saneerausvaihtoehtoja tutkittiin.
Nykyisen energiankulutuksen mallinnus osui lähelle todellista kulutusta.
Energiakorjausten mallinnus antoi myös hyväksyttäviä tuloksia.
Investointien kannattavuuden laskennassa suurimmaksi epävarmuustekijäksi muodostui kustannusten arviointi laajan lähtötietomateriaalin puuttuessa.
Tätä varten luotiin urakkakustannusten järjestelmälliseen seurantaan työkalu.

Laskentamalli ja kannattavuus vertailu todettiin tarpeeksi tarkaksi sekä nopeakäyttöiseksi hankesuunnitelmavaiheen käyttöön.
Tulosten tarkkuus riippuu kuitenkin olennaisesti lähtötietojen laadusta ja tarkkuudesta.
Saatujen kokemusten perusteella hahmoteltiin kolme energiakorjausraportin laajuutta jatkokehittämistä varten.
ED:2013-10-23
INSSI record number: 47404
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