Impact of the Envelope Layout in the Thermal Behavior of Buildings in Panama: A Numerical Study

Araúz, Jesús; Mora, Dafni; Austin, Miguel Chen

doi:10.1109/iestec46403.2019.00-74

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…In 2019, two conference proceedings evaluated thermal comfort by adjusting construction materials via simulation. The first one [19] focused on WWR, regarding national recommendations [20], along with an appropriate combination with wall insulation. This demonstrated the importance of applying insulation without obstructing the capacity of discharge.…”

Section: Humid Tropical Regions In Americamentioning

confidence: 99%

Assessment of Different Envelope Configurations via Optimization Analysis and Thermal Performance Indicators: A Case Study in a Tropical Climate

2022

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Passive solutions for more energy-efficient buildings are critical to improving our odds in the current energy crisis. This work focuses on assessing the thermal performance of different envelope construction layouts in a tropical climate through proposed indicators regarding the thermal mass degree (TMD) and insulation degree (ID). For this, a numerical study was performed for a reference building (RB) in Panama City and validated with the electricity consumption bills. Behavioral and sensitivity analyses were employed to identify critical heat gains and the most important envelope constructions, resulting in the layouts of the roof and external walls. Optimization analyses were performed to find adequate layouts to reduce the discomfort hours. Different roofs, external walls, internal partition layouts, and glazing types were evaluated. Results indicated that the adequate envelope configuration is a roof layout with low TMD and ID, along with wall layouts with high TMD and low ID.

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Section: Humid Tropical Regions In Americamentioning

confidence: 99%

Assessment of Different Envelope Configurations via Optimization Analysis and Thermal Performance Indicators: A Case Study in a Tropical Climate

2022

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“…Such benefits can significantly reduce building energy consumption with respect to location (latitude). In tropical latitudes with high humidity and temperatures with weak day-night fluctuations, ventilation, appropriate thermal mass, and insulation significantly improve thermal comfort [8,9]. This is particularly true for vernacular houses in tropical regions.…”

Section: Introductionmentioning

confidence: 99%

Investigation of discharge coefficient of louvre openings in naturally ventilated buildings

Iqbal,

Ozaki,

Choi

et al. 2023

E3S Web of Conf.

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Louvre openings are widely used for ventilation in residences at tropical regions. Traditional households rely primarily on natural ventilation for cooling instead of using air conditioners throughout the year. Hence, a design strategy that maximizes the natural ventilation rate with an accurate discharge coefficient is necessary. The discharge coefficient for a traditional window without a louvre is 0.6. However, studies on discharge coefficients for louvre openings with sashes are lacking. Discharge coefficient will differ according to the installed sash owing to increased contraction and friction losses. Therefore, we determined the discharge coefficient value for various sash angles and the impact of the louvre geometric parameter on the discharge coefficient. To investigate the effects of geometry on the discharge coefficient, real-time natural ventilation rate was quantified using the tracer gas (constant concentration) method. Pressure difference, outdoor wind velocity, and temperature difference were also measured. The opening types were divided into three cases: louvres with a sash angle of 0°, 15°, and 30° with similar opening areas. The results show that discharge coefficients for louvres with sash angles of 0°, 15°, and 30° are 0.80, 0.62, and 0.41, respectively, indicating that the coefficient decreases with increasing sash opening angle.

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“…Besides, the behavior of the intermittent nature of these energy sources requires considerable support that represents large investments [ 3 ]. Evaluations have been performed in Panama considering the bioclimatic of the site for building strategies to assure indoor thermal comfort [ 7 , 8 ], and even to reduce energy consumption due to air conditioning [ 9 ], reaching promising results. For this reason, due to scarce resources and because conventional practices are no longer sufficient to solve the problem, it is necessary to change the design thinking and find the most efficient way to solve the problems as nature does, using new strategies based on biomimetics.…”

Section: Introductionmentioning

confidence: 99%

Biomimicry-Based Strategies for Urban Heat Island Mitigation: A Numerical Case Study under Tropical Climate

et al. 2021

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In recent years, demographic growth has caused cities to expand their urban areas, increasing the risk of overheating, creating insurmountable microclimatic conditions within the urban area, which is why studies have been carried out on the urban heat island effect (UHI) and its mitigation. Therefore, this research aims to evaluate the cooling potential in the application of strategies based on biomimicry for the microclimate in a historical heritage city of Panama. For this, three case studies (base case, case 1, and case 2) of outdoor thermal comfort were evaluated, in which the Envi-met software was used to emulate and evaluate the thermal performance of these strategies during March (highest temperature month) and October (rainier month). The strategies used were extracted from the contrast of zebra skin, human skin, evaporative cooling, and ant skin. The results showed a reduction of 2.8 °C in the air temperature at 11:00, the radiant temperature decreased by 2.2 °C, and the PET index managed to reduce the thermal comfort indicator among its categories. The importance of thinking based on biomimicry in sustainable strategies is concluded; although significant changes were obtained, high risks of discomfort persist due to the layout and proximity of the building.

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Impact of the Envelope Layout in the Thermal Behavior of Buildings in Panama: A Numerical Study

Cited by 5 publications

References 8 publications

Assessment of Different Envelope Configurations via Optimization Analysis and Thermal Performance Indicators: A Case Study in a Tropical Climate

Assessment of Different Envelope Configurations via Optimization Analysis and Thermal Performance Indicators: A Case Study in a Tropical Climate

Investigation of discharge coefficient of louvre openings in naturally ventilated buildings

Biomimicry-Based Strategies for Urban Heat Island Mitigation: A Numerical Case Study under Tropical Climate

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