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Wind tunnel test and numerical study of a multi-sided wind tower with horizontal heat pipes

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  • Mahon, Harry
  • Friedrich, Daniel
  • Hughes, Ben

Abstract

Passive ventilation such as wind towers can ventilate spaces by using regional pressure differences and the stack effect. Wind towers are often closed throughout the winter to prevent an increase in heating energy demand. Heat pipes can be installed to transfer heat from the outgoing to the incoming air, however the inclusion of heat recovery can incur a pressure drop that negatively impacts ventilation rates. Here it is shown that with an array of horizontally arranged heat pipes, ventilation rates of 0.1 m3/s are maintained at a 1 m/s inlet velocity. The incoming air temperature was raised by up to 2.8 °C, thereby increasing the operational window of the passive ventilation system. By mounting the heat pipes horizontally through the wind tower, direct heat transfer is facilitated between the inlet and outlet. The results demonstrate how a passive ventilation and heat recovery system is likely to operate in the winter months of a cooler climate according to the wind speed and temperature difference between the fresh and exhaust air. It is intended that this system will be further developed to provide both heating and cooling in the winter and summer respectively by installing a seasonal thermal loop.

Suggested Citation

  • Mahon, Harry & Friedrich, Daniel & Hughes, Ben, 2022. "Wind tunnel test and numerical study of a multi-sided wind tower with horizontal heat pipes," Energy, Elsevier, vol. 260(C).
    • Handle: RePEc:eee:energy:v:260:y:2022:i:c:s0360544222020138
    DOI: 10.1016/j.energy.2022.125118
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    References listed on IDEAS

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    1. Calautit, John Kaiser & Hughes, Ben Richard & O’Connor, Dominic & Shahzad, Sally Salome, 2017. "Numerical and experimental analysis of a multi-directional wind tower integrated with vertically-arranged heat transfer devices (VHTD)," Applied Energy, Elsevier, vol. 185(P2), pages 1120-1135.
    2. Calautit, John Kaiser & Tien, Paige Wenbin & Wei, Shuangyu & Calautit, Katrina & Hughes, Ben, 2020. "Numerical and experimental investigation of the indoor air quality and thermal comfort performance of a low energy cooling windcatcher with heat pipes and extended surfaces," Renewable Energy, Elsevier, vol. 145(C), pages 744-756.
    3. Saadatian, Omidreza & Haw, Lim Chin & Sopian, K. & Sulaiman, M.Y., 2012. "Review of windcatcher technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(3), pages 1477-1495.
    4. Jomehzadeh, Fatemeh & Nejat, Payam & Calautit, John Kaiser & Yusof, Mohd Badruddin Mohd & Zaki, Sheikh Ahmad & Hughes, Ben Richard & Yazid, Muhammad Noor Afiq Witri Muhammad, 2017. "A review on windcatcher for passive cooling and natural ventilation in buildings, Part 1: Indoor air quality and thermal comfort assessment," Renewable and Sustainable Energy Reviews, Elsevier, vol. 70(C), pages 736-756.
    5. Kalantar, Vali, 2009. "Numerical simulation of cooling performance of wind tower (Baud-Geer) in hot and arid region," Renewable Energy, Elsevier, vol. 34(1), pages 246-254.
    6. Akeiber, Hussein & Nejat, Payam & Majid, Muhd Zaimi Abd. & Wahid, Mazlan A. & Jomehzadeh, Fatemeh & Zeynali Famileh, Iman & Calautit, John Kaiser & Hughes, Ben Richard & Zaki, Sheikh Ahmad, 2016. "A review on phase change material (PCM) for sustainable passive cooling in building envelopes," Renewable and Sustainable Energy Reviews, Elsevier, vol. 60(C), pages 1470-1497.
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    1. Omar Dhia Al-Hassawi & David Drake, 2023. "Innovations in Passive Downdraft Cooling Performance Evaluation Methods: Design and Construction of a Novel Environmental Test Chamber," Energies, MDPI, vol. 16(11), pages 1-20, May.

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