Real-Time Monitoring and Development of a Localized OTTV Equation for Building Energy Performance

Anees A. Vighio; Rozana Zakaria; Faridahanim Ahmad; Eeydzah Aminuddin

doi:10.28991/CEJ-2025-011-02-09

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Anees A. Vighio
anees@graduate.utm.my
1) Faculty of Civil Engineering, Universiti Teknologi Malaysia Skudai, 81310, Johor Bahru, Malaysia. 2) Department of Civil Engineering, Mehran University of Engineering & Technology Jamshoro 76062, Sindh, Pakistan. http://orcid.org/0009-0003-9725-2764
Rozana Zakaria Faculty of Artificial Intelligence, Universiti Teknologi Malaysia, Kuala Lumpur 54100,, Malaysia
Faridahanim Ahmad Faculty of Civil Engineering, Universiti Teknologi Malaysia Skudai, 81310, Johor Bahru,, Malaysia
Eeydzah Aminuddin School of Civil Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam, Selangor,, Malaysia

Vol. 11 No. 2 (2025): February

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Global warming negatively impacts indoor environments, affecting human comfort. Despite global efforts, energy demand and greenhouse gas emissions continue to rise. As sustainable building designs become more critical, enhancing energy efficiency through real-time data analytics is essential. The Overall Thermal Transfer Value (OTTV) is a key metric for assessing a building's energy usage, considering factors like orientation, location, and climate. However, limited research has examined real-time data's impact on OTTV coefficients. Therefore, this research aims at developing and validating new OTTV coefficients using real-time data with the EQUEST simulation engine. The coefficients of OTTV (Equivalent Temperature Difference TDeq, Temperature Difference âˆ†T, and Solar Factor SF) were monitored in real-time using HOBO Temperature Data loggers and Delta Ohm Photometer for Solar Radiations. Focusing on UTM Eco-Home building, the study calculates heat gain components, including transmission through walls, windows, and radiation heat gain. The findings of the study suggest that the modified OTTV equation accurately determines a building's OTTV, enhancing energy efficiency evaluations. The novelty of the study lies in the development of a new OTTV equation for the specific climate of Johor, Malaysia, and the real-time monitoring of OTTV that helps the energy managers analyze the Thermal Transmittance of Building envelopes in real-time.

Doi: 10.28991/CEJ-2025-011-02-09

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Vighio, A. A., Zakaria, R., Ahmad, F., & Aminuddin, E. (2025). Real-Time Monitoring and Development of a Localized OTTV Equation for Building Energy Performance. Civil Engineering Journal, 11(2), 544–564. https://doi.org/10.28991/CEJ-2025-011-02-09

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Real-Time Monitoring and Development of a Localized OTTV Equation for Building Energy Performance

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