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Fastigheten Maskinbolaget SWECON: - programbaserade och egna energiberäkningar med ekonomisk kalkyl
Mälardalen University, School of Sustainable Development of Society and Technology.
2008 (Swedish)Independent thesis Basic level (university diploma), 20 credits / 30 HE creditsStudent thesis
Abstract [sv]

Sammanfattning

I det följande examensarbetet har två alternativ av installationer jämförts beträffande ny­­bygg­nationen Maskinbolaget Swecon, en fastighet med en kontorsbyggnad och till­hör­­ande maskinhall i Uppsala. Alternativen har varit en fjärrvärmeinstallation med en separat kyl­mas­kin, och två bergvärmepumpar med en frikyleslinga. Jämförelser har gjorts mellan dator- och egenberäknade simu­leringar av energi­för­­brukningen [kWh­­/­(m2,år)], och då med olika ändringar i fastig­het­ens kon­struk­tion, där det ur­sprung­­­liga pro­jekt­­erings­un­der­laget har varit utgångspunkt (Inne­kli­mat­byrån, 2008).

    Därefter har en nu­vär­des­­kal­kylering med en kalkylhorisont på 30 år utförts, som visar på det mest eko­no­miska alternativet och simuleringen gällande drifts- och in­ves­­­t­eringskostnader.

    Energiberäkningarna har genomförts med datorprogrammen BV2 och VIP+, och även med egna beräkningar i Excel. Nuvärdeskalkylen har också gjorts i Excel.

 

                                     ♠    ♠    ♠

 

Resultaten visar att kontorsbyggnaden och maskinhallen uppfyller riktlinjerna från Bo­verkets byggregler, BBR, avseende U-värde. Kontoret uppfyller även BBR:s di­rek­tiv angående energi­för­bruk­ning [kWh/(m2,år)], något som däremot inte gäller för mas­kinhallen.

    Alternativet med bergvärmepumparna är ekonomiskt fördel­ak­tig­ast i ett per­spek­tiv på 30 år. Jämförelserna mellan de olika simuleringarna ger vidare att störst för­tjänst erhålls då maskinhallen utrustas med vikportar som har ett lägre U-värde än de ur­sprung­­liga, och även att luftflödet till samma lokal sänks med tio procent. Med dessa förändringar uppfyller även maskinhallen BBR:s direktiv enligt ovan.

    De egna beräkningarna i Excel anses här ge ett lika tillförlitligt resultat på fastig­het­­ens energiförbrukning som med dator­programmen BV2 och VIP+, förbehållet att vissa justeringar görs på in­­gå­ende ekvationer.    

 

 

 

 

 

Abstract [en]

 

Abstract

In this degree project a comparison between two alternatives of heating and cooling systems has been made, regarding not yet constructed buildings on the property Maskinbolaget Swecon in Uppsala, consisting of an office and a machine room. The al­ter­­­natives of choice have been a district heating installation with a separate refri­ge­ra­ting machine, and two heat pumps with the bedrock as a heat source, the latter equip­ped with a circuit of directly transferred cold water from the bedrock as a cool­ing sys­tem. A number of simulations of the buildings' en­­er­gy consumption [kWh /(m2,år)] have also been performed, and this with a variety of comparisons con­tain­ing of certain chang­es of the construction of the buildings vis-à-vis the original plan­ning data.

    After that a calculation of present value with a perspective of 30 years has been executed, a calculation which shows the most economical alternative and simulation concerning the costs of operation and investment.

    The simulations of the energy consumption have been computed with the pro­gram­mes BV2 and VIP+, and also with a matrix in Excel by the writer's own design. The calculation of present value has been performed in Excel.  

 

                                     ♠    ♠    ♠

 

The results indicate that the office and the machine hall fulfil the guidelines of U-value from BBR. The office also comply with BBR regarding the energy consump­tion [kWh/(m2,år)]; this, however, is not the case with the machine hall.

    The alternative with the heat pumps is the economically most sound, viewed in the perspective of 30 years. Furthermore, the comparisons of the different simula­tions yield that the largest profit occur when the machine hall is equipped with ent­rance gates that have a lower U-value than the originally planned, and also that the air flow to the mentioned hall is decreased with ten per cent. With these changes, even the machine hall fulfil the requirements of energy consumption from BBR.

    The results from the computations with the matrix in Excel, is in this degree pro­ject consider­ed to be as accurate as those derived from the programmes BV2 and VIP+, on con­di­tion that certain adjustements are made in the equations of the mat­rix.   

Place, publisher, year, edition, pages
2008. , p. 34+164
Keywords [sv]
Installationsteknik, energiberäkningar, energisimulering, vip+, bv2, ekonomisk kalkyl, beräkningsprogram, installationer, simulering
National Category
Other Civil Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-5355OAI: oai:DiVA.org:mdh-5355DiVA, id: diva2:173344
Presentation
(English)
Uppsok
teknik
Supervisors
Examiners
Available from: 2009-03-03 Created: 2009-02-14 Last updated: 2009-03-03Bibliographically approved

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