Predicting the performance of radiant technologies in attics: Reducing the discrepancies between attic specific and whole-building energy models

Fontanini, Anthony D.; Aguilar, Jose L. Castro; Mitchell, Matt S.; Kośny, Jan; Merket, Noel; DeGraw, Jason; H, Lee

doi:10.1016/j.enbuild.2018.03.054

Cited by 4 publications

(2 citation statements)

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“…To investigate the thermal environment and long-term cooling load of classrooms in hot-humid areas, a numerical simulation tool known as EnergyPlus was used in this study. Developed by the US Department of Energy's Building Technologies Office, Ener-gyPlus [39] is a whole-building energy simulation program, whose accuracy has been validated by many studies [40][41][42][43][44][45][46]. Over the years, it has been widely used in building simulations worldwide, including hot-humid areas [47][48][49][50].…”

Section: Study Areamentioning

confidence: 99%

“…External Shading Devices. External shading devices are also deployed to limit space heat gain, with demonstrable effectiveness in lowering the cooling load in hot-humid areas [10,46,66]. In this study, the impacts of horizontal shading devices and egg-crate shading devices were tested on the north-and south-facing classroom windows (Figure 18).…”

Section: External Wall Constructionmentioning

confidence: 99%

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Thermal Environment and Energy Performance of a Typical Classroom Building in a Hot-Humid Region: A Case Study in Guangzhou, China

2022

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Buildings and the construction sector account substantially for global energy consumption. In hot-humid areas of China, suboptimal thermal comfort in classrooms has heightened their cooling load and energy consumption. It is necessary to renovate the buildings of outdated code according to the current weather conditions to save energy. This study thus aimed to examine the thermal effects of such designs on the cooling load, based on an actual classroom building during summers in hot-humid southern China. Using air temperature and PMV values to evaluate thermal comfort, this study conducted simulation through EnergyPlus and DesignBuilder. The resultant updated typical meteorological year (TMY) and the monthly and hourly analyses of indoor thermal comfort revealed persistent classroom overheating. To mitigate the cooling load, numerous design variables were investigated: space form, roofing, external walls, windows, and shading devices. Evaluative comparisons found that appropriate choice of external windows and shading devices represented the two most effective strategies in mitigating the cooling load. Furthermore, jointly applying effective retrofit strategies to the building yielded a favorable reduction in the annual cooling energy consumption by 16.6%. The findings herein are envisioned to provide evidence-based referential guidance for building designs for classrooms in a hot-humid climate.

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