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Energimodellering med specialanpassade BIM-verktyg: En undersökning av hur parametrisk programmering kan användas för energianalyser av byggnader
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
2024 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Energy Modeling with Customized BIM Tools : An exploration of how parametric programming can be used for energy analysis of buildings (English)
Abstract [sv]

Detta examensarbete vid Kungliga Tekniska Högskolan utforskar tillämpningen av parametrisk programmering för avancerad energianalys av byggnader genom att använda de relativt nya verktygen Ladybug Tools inom Grasshopper. Arbetet kompletteras med andra metoder för att undersöka arbetsprocessen vid energimodellering. Studien utvärderar effektiviteten och potentialen hos parametriska verktyg för att automatisera och optimera processer för energimodellering.Genom en metodik som inkluderar litteraturgranskning, intervjuer och en praktisk fallstudie undersöks interoperabilitetsutmaningar mellan BIM (Building Information Modeling) och BEM (Building Energy Modeling) samt verktygens effektivitet i energianalyser. Tester och jämförelser görs med simuleringsverktyget IDA ICE som är ett betrott verktyg i branschen.Studien har visat på goda förutsättningar och potential för att använda parametriska verktyg på ett tillförlitligt sätt, eftersom resultaten från Ladybug Tools och IDA ICE visade relativt samstämmiga värden när metoderna testades mot varandra i samma scenario, dock en skillnad var att resultaten från IDA ICE visade generellt högre transmissionsförluster vilket resulterade i högre uppvärmningsenergi. Samtidigt identifierades utmaningar inom Grasshopper-metoden, främst kopplat till uppbyggnaden av HVAC-systemen och resultatutläsning. Ytterligare utveckling behövs för komponenterna som hanterar tekniska system för att maximera verktygets användbarhet. Vidare har tillhörande verktyg visat sig vara någorlunda effektivt för att omvandla BIM-modeller till BEM-modeller som sedan kunde användas i båda simuleringssprogram, vilket ger tidsbesparingar och bidrar till en mer effektiv arbetsprocess.

Abstract [en]

This thesis written at Royal Institute of Technology in Stockholm explores the application of parametric programming for advanced energy analysis of buildings using the relatively new tools Ladybug Tools within Grasshopper. The work is complemented by other methods to examine the workflow of energy modeling. The study evaluates the effectiveness and potential of parametric tools to automate and optimize processes for energy modeling.Through a methodology that includes literature reviews, interviews, and practical case studies, the study also examines interoperability challenges between BIM (Building Information Modeling) and BEM (Building Energy Modeling) as well as the tools' effectiveness in energy analyses. Tests and comparisons are made with the commonly used tool IDA ICE, which is popular in the industry.The study has shown good potential for using parametric tools reliably, as the results from Ladybug Tools and IDA ICE showed relatively consistent values when the methods were tested against each other in the same scenario. For example, the results from IDA ICE indicated higher transmission losses, resulting in higher heating energy. At the same time, challenges were identified within the Grasshopper method, primarily related to the construction of HVAC systems and result interpretation. Further development is needed for the components that handle technical systems to maximize the tool's useability. Furthermore, the associated tool has proven to be reasonably effective in converting BIM models to BEM models, which saves time and contributes to a more efficient workflow.

Place, publisher, year, edition, pages
2024.
Series
TRITA-ABE-MBT ; 24652
Keywords [en]
Grasshopper, BIM, BEM, Building information modeling, Building energy modeling, Ladybug Tools, IDA ICE, Energy simulation, Energy analysis, Interoperability, Parametric programming.
Keywords [sv]
Grasshopper, BIM, BEM, Building information modeling, Building energy modeling, Ladybug Tools, IDA ICE, Energisimulering, Energianalys, Interoperabilitet, Parametrisk programmering.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-351861OAI: oai:DiVA.org:kth-351861DiVA, id: diva2:1889818
External cooperation
Bengt Dahlgren AB
Supervisors
Examiners
Available from: 2024-08-16 Created: 2024-08-16

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