Data requirements and workflow for energy efficient renovation
Author
Petersons, Reinis
Term
4. term
Publication year
2020
Submitted on
2020-04-23
Abstract
This thesis examines how energy-efficient renovation of residential buildings can be supported by digital data and BIM. The motivation is tightening energy regulations (BR18 and related guidance), a large existing building stock without BIM documentation, and the need for up-to-date information on geometry and materials. The aim is to identify the information required for performance-oriented renovation and to describe an integrated workflow linking building capture, BIM modeling and energy calculation. Methods include a literature review; distinguishing geometric and semantic data and available methods to register them in existing buildings; reviewing Danish energy calculation practice and standards (BR18, SBi, DS, including links to DS418); defining registration and exchange protocols to connect site capture to model creation; surveying typical Danish building types; and a proof-of-concept that extracts data from a Revit model using Dynamo scripts to supply U-value and heat transmission calculations. The thesis proposes a workflow for energy calculations in renovation projects, shows how geometric models can be enriched with the necessary semantic information and how data can be extracted for calculation tools, and discusses key trade-offs between energy performance, cost, architectural value and indoor climate. The conclusion outlines discussion points and suggests future work to further develop and test the workflow in practice.
Denne afhandling behandler, hvordan energirenovering af boliger kan understøttes af digitale data og BIM. Baggrunden er skærpede krav til energieffektivitet (BR18 m.fl.), en stor eksisterende bygningsmasse uden BIM-dokumentation og behovet for ajourført viden om bygningers geometri og materialer. Formålet er at identificere, hvilke oplysninger der kræves for performanceorienteret energirenovering, og at beskrive en sammenhængende workflow fra bygningsregistrering over BIM-modellering til energiberegning. Metodisk omfatter arbejdet et litteraturstudie; en skelnen mellem geometriske og semantiske data samt metoder til at registrere dem i eksisterende bygninger; en gennemgang af dansk energiberegningspraksis og standarder (BR18, SBi, DS, herunder sammenhænge til DS418); udledning af registrerings- og udvekslingsprotokoller som bro mellem opmåling og model; samt et proof-of-concept, der demonstrerer udtræk af data fra en Revit-model via Dynamo-scripts til brug for U-værdi- og varmetabsberegninger. Afhandlingen foreslår en workflow for energiberegning i renoveringsprojekter, viser hvordan geometriske modeller kan beriges med nødvendig semantisk information og hvordan data kan ekstraheres til beregningssoftware, og diskuterer centrale afvejninger mellem energieffektivitet, økonomi, arkitektonisk værdi og indeklima. Konklusion og diskussion peger på behov for yderligere udvikling og afprøvning af workflowet i praksis.
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