Experimental and numerical evaluation of a novel dual-channel windcatcher with a rotary scoop for energy-saving technology integration
Building and Environment
; 230, 2023.
Article
in English
| Scopus | ID: covidwho-2232441
ABSTRACT
With the increasing requirements for fresh air supply in buildings after the COVID-19 pandemic and the rising energy demand from buildings, there has been an increased emphasis on passive cooling techniques such as natural ventilation. While natural ventilation devices such as windcatchers can be a sustainable and low-cost solution to remove indoor pollutants and improve indoor air quality, it is not as reliable as mechanical systems. Integration with low-energy cooling, heating or heat recovery technologies is necessary for operation in unfavourable outdoor conditions. In this research, a novel dual-channel windcatcher design consisting of a rotary wind scoop and a chimney was proposed to provide a fresh air supply irrespective of the wind direction. The dual-channel design allows for passive cooling, dehumidification and heat recovery technology integration to enhance its thermal performance. In this design, the positions of the supply and return duct are "fixed” or would not change under changing wind directions. An open wind tunnel and test room were employed to experimentally evaluate the ventilation performance of the proposed windcatcher prototype. A Computational Fluid Dynamic (CFD) model was developed and validated to further evaluate the system's ventilation performance. The results confirmed that the system could supply sufficient fresh air and exhaust stale air under changing wind directions. The ventilation rate of the rotary scoop windcatcher was higher than that of a conventional 8-sided multidirectional windcatcher of the same size. © 2023 The Author(s)
Buildings; Computational Fluid Dynamic (CFD); Energy; Natural ventilation; Passive cooling; Ventilation; Wind flow; Wind tunnel; Windcatcher; Air quality; Computational fluid dynamics; Cooling; Energy conservation; Humidity control; Indoor air pollution; Integration; Structural design; Waste heat; Wind tunnels; Computational fluid dynamic; Dual channel; Fresh air; Technology Integration; Wind catchers; Wind directions; building; experimental study; numerical method
Full text:
Available
Collection:
Databases of international organizations
Database:
Scopus
Type of study:
Experimental Studies
/
Prognostic study
Language:
English
Journal:
Building and Environment
Year:
2023
Document Type:
Article
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