Building envelope element for decentralized ventilation with solar energy utilization [Elektronski vir]
Arkar, Ciril ; Medved, Sašo
Decentralized ventilation is more convenient at building renovation and more efficient than central ventilation in buildings with different ventilation requirements. However, decentralized ...ventilation must also meet requirements for energy efficiency, thus ensuring a high heat recovery rate. The paper presents a study of the effectiveness of decentralized ventilation device which is integrated into the building envelope and which in addition to heat recovery enables also solar energy utilization. For heat recovery effectiveness analyses 3D numerical model of heat transfer was developed. Among the influential parameters the air flow rate, heat transfer area augmentation, and optical properties of the outer surface were analysed. Based on numerical results, multi-parametric models of heat recovery effectiveness were developed, which has been experimentally verified. Experimental results and numerical analyses show that the solar energy utilization significantly increases average heat recovery effectiveness.
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