Studies of ventilation and thermal comfort in different wind tower-room configurations considering humidification for a warm climate of Mexico

Carreto-Hernandez, L.G.; Moya, Sara L.; Varela-Boydo, C.A.; Francisco-Hernandez, A.

doi:10.1016/j.jobe.2021.103675

Cited by 3 publications

(2 citation statements)

References 58 publications

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“…In another study [21], the integration of a windcatcher with air humidification was explored in terms of thermal comfort for warm climate conditions. The findings indicated that opting for an appropriate arrangement and implementing a chamfer can greatly enhance ventilation and thermal comfort.…”

Section: Introductionmentioning

confidence: 99%

The Windcatcher: A Renewable-Energy-Powered Device for Natural Ventilation—The Impact of Upper Wing Walls

Nejat,

Fekri,

Sheikhshahrokhdehkordi

et al. 2024

Energies

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In recent years, there has been increased interest in natural ventilation solutions as a means to achieve sustainable and energy-efficient building design. Windcatchers, ancient Middle Eastern architectural elements, have surfaced as viable passive cooling devices in modern architecture, thereby enhancing interior air quality and reducing the reliance on mechanical ventilation systems. Integrating upper wing walls (UWWs) is hypothesized to augment a windcatcher’s effectiveness by optimizing wind capture, air circulation, and thermal regulation. Therefore, this study aimed to explore the influence of incorporating a two-sided windcatcher with UWWs, with a particular emphasis on the effect of the UWW angle on ventilation performance within building spaces. To achieve this aim, a series of numerical simulations were conducted to assess the synergy between the windcatcher and the wing wall configuration with varying UWW angles and under varying wind speed conditions. As the first step of the research methodology, the CFD model was validated through a comparison between the numerical results and the experimental data. The findings showed good agreement between these methods. In the next phase, windcatchers with different UWW angles spanning the range of 0° to 90° were subjected to rigorous evaluation. The results revealed that the configuration with a 30° angle exhibited the optimal performance concerning critical ventilation parameters encompassing the airflow rate, air change rate, and mean age of air. Finally, the selected configuration underwent an evaluation under diverse wind speed conditions, which affirmed that even under low-wind-speed conditions, the windcatcher provides ventilation levels that align with the standard requirements.

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Section: Introductionmentioning

confidence: 99%

The Windcatcher: A Renewable-Energy-Powered Device for Natural Ventilation—The Impact of Upper Wing Walls

Nejat,

Fekri,

Sheikhshahrokhdehkordi

et al. 2024

Energies

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“…Among these four aspects, TC and IAQ are commonly suggested for priority consideration to avoid healthrelated symptoms, absenteeism, and loss of concentration [10,11]. Thus, to guarantee the health and efficiency of occupants, a better indoor environment with suitable TC and IAQ is suggested [12], and many studies have focused on particular methods to achieve better IEQ, such as the use of windcatchers [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Indoor Thermal and Ventilation Indicator on University Students’ Overall Comfort

Jia¹,

Li²,

Chen

et al. 2022

Buildings

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Thermal comfort (TC) and CO2 concentration significantly influence the overall indoor comfort sensations of building occupants. However, few studies have focused on educational buildings regarding both TC and CO2 concentration in tropical regions, and they also lack guidelines for short-term evaluation, which is essential for university classrooms. In this study, a mechanically ventilated university classroom was selected to investigate the 5 min-averaged comfort ranges for indoor parameters and the impacts of TC and variation of CO2 on student overall comfort. The real-time indoor environmental parameters were monitored, including indoor air temperature (Ta), mean radiant temperature (Tm), relative humidity (RH) and CO2 and air velocity (va); the operative temperature (Top) was calculated. Moreover, an online-based questionnaire survey related to thermal sensation (TS) and CO2-related air sensation (AS) was carried out. Linear and nonlinear regression models of comfort sensation predictions were obtained based on the questionnaires and corresponding measured indoor environmental data. The 5 min-averaged comfort ranges for Top, CO2 and RH are 21.5–23.8 °C, <1095 ppm and 47–63.5%, respectively. The comfort range of the TS and AS are 2.3–3.1 and 1–1.55, respectively. The result shows that students prefer a relatively cold indoor environment, as this improves their ability to tolerate bad indoor air quality (IAQ) with high CO2. A regression analysis indicated that AS is the most critical aspect, with a weight of 0.32, followed by TS, with 0.18. Finally, it was also found that individual weighting coefficients were not equivalent and differed across geographical locations and building types. Thus, obtaining the prediction models for a particular building is necessary. The results can give meaningful suggestions to adopt the appropriate operations for HVAC and improve indoor environmental quality in university buildings in tropical regions.

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Numerical-experimental investigation of a wind tower-room sustainable system: A parametric analysis of the mixed convection with humidification

Carreto-Hernandez,

Moya,

Báez-García

et al. 2024

Journal of Building Engineering

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Studies of ventilation and thermal comfort in different wind tower-room configurations considering humidification for a warm climate of Mexico

Cited by 3 publications

References 58 publications

The Windcatcher: A Renewable-Energy-Powered Device for Natural Ventilation—The Impact of Upper Wing Walls

The Windcatcher: A Renewable-Energy-Powered Device for Natural Ventilation—The Impact of Upper Wing Walls

Indoor Thermal and Ventilation Indicator on University Students’ Overall Comfort

Numerical-experimental investigation of a wind tower-room sustainable system: A parametric analysis of the mixed convection with humidification

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