Application of Vertical Greenery Systems to Enhance Energy Efficiency in the Design of Mixed-Use Buildings in Hot-Humid Climates
Abstract
This study investigates the impact of Vertical Greenery Systems (VGS) on energy efficiency in mixed-use buildings within the hot-humid climate of Abuja, Nigeria. Through a comparative analysis of a one-bedroom apartment model with and without VGS, this research evaluates energy consumption, cooling loads, and indoor thermal comfort over a year. Results demonstrate that VGS significantly reduces monthly energy demand, with system loads consistently lower than those in non-VGS scenarios. Sub-hourly cooling load data for a typical day (April 15th) reveals peak loads reduced by nearly 50% with VGS, highlighting its effectiveness in mitigating heat gain. Additionally, annual indoor operative temperature and relative humidity data indicate improved thermal comfort with VGS, with peak temperatures often below 30°C and slightly reduced humidity levels. These findings underscore VGS as a sustainable design strategy for reducing reliance on mechanical cooling, enhancing energy efficiency, and promoting environmentally responsible building practices in challenging climates.
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