Performance Evaluation of Active and Passive Systems on Energy Consumption Reduction Based on Comfort Conditions

Articles in Press

Document Type : Original Article

Authors

Shahid Beheshti University

Abstract

This study focuses on the design and modeling of an office building aimed at increasing energy efficiency and reducing greenhouse gas emissions. In this regard, both passive and active energy methods have been employed, including changing consumption patterns, insulation, adjusting the dimensions and positions of windows, and improving the efficiency of lighting and ventilation systems. Analyses show that the highest electricity consumption in this building is attributed to electricity for rooms (55/4%) and cooling systems (22/04%). Additionally, refrigerators and lighting systems account for 56/9% of internal heat generation. The results indicate that by employing a combination of active and passive methods, electricity and gas consumption will be reduced by 58/73% and 59/39%, respectively. Improving the usage patterns of office equipment and lighting has had a more significant impact on reducing electricity consumption (81/6%). Additionally, the capacity of heating and cooling coils will be reduced by 57/70% and 71/69%, respectively. The highest energy consumption is evident in providing gas for heating and electricity for cooling, which will decrease by 7/89 and 33/97 Megawatt-hours, respectively, following the implementation of energy optimization strategies. The peak heating and cooling loads have also decreased by 88/8 and 65/7, respectively, resulting in a 65% increase in user environmental comfort. These results highlight the importance of optimizing energy consumption in buildings and its impact on improving environmental conditions.

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Journal of sustainable Energy Systems

Articles in Press, Accepted Manuscript
Available Online from 19 September 2025

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