BIM-based Automation for OTTV Calculation and Construction Cost Estimation in Energy-Efficient Building Design
Journal
Proceedings of the World Congress on New Technologies
ISSN
23698128
ISBN (of the container)
9781990800627
ISBN
9781990800627
Date Issued
2025
Author(s)
Morakote, Nichakarn
Rinchumphu, Damrongsak
Manokeaw, Sattaya
Khuwuthyakorn, Pattarraporn
Phichetkunbodee, Non
Abstract
Due to the increasing trend of building energy consumption in Thailand, the Department of Alternative Energy Development and Efficiency (DEDE) established the Building Energy Code (BEC) to promote energy conservation. The BEC standard evaluates energy-efficient buildings with initial assessments conducted using the DEDE-developed software, BEC Version 1.0.6. The Overall Thermal Transfer Value (OTTV) is a crucial index in the BEC code for evaluating building energy efficiency. However, adding OTTV calculation task during the design stage may hinder the flow and time consuming. This study introduces a BIM-based tool developed using Dynamo, an add-in for Autodesk Revit, to assist designers in evaluating building designs while simultaneously controlling construction costs. The 3D model of eight alternative cases was created according to various building envelope and orientation settings. The instruction sets for OTTV calculation and construction cost of the wall extracted from the software were compared to the BEC program to validate its efficiency. The results demonstrate that the OTTV calculation using the developed instruction set closely aligns with the BEC program, achieving an R² value of 0.9898. Additionally, the instruction set for construction cost estimation produces lower costs compared to traditional methods. This workflow streamlines OTTV evaluation and construction cost estimation, enhancing design efficiency while ensuring compliance with energy standards.
Event(s)
11th World Congress on New Technologies, NewTech 2025, Paris, 21 August 2025 - 23 August 2025
Subjects
BIM
Construction Cost
OTTV
Wall
Publisher
Avestia Publishing
Type
conference paper