Evaluating the Effect of Window-to-Wall Ratios on Cooling-Energy Demand on a Typical Summer Day.
Int J Environ Res Public Health
; 18(16)2021 08 09.
Article
en En
| MEDLINE
| ID: mdl-34444161
ABSTRACT
The window-to-wall ratio (WWR) significantly affects the indoor thermal environment, causing changes in buildings' energy demands. This research couples the "Envi-met" model and the "TRNSYS" model to predict the impact of the window-to-wall ratio on indoor cooling energy demands in south Hunan. With the coupled model, "Envi-met + TRNSYS", fixed meteorological parameters around the exterior walls are replaced by varied data provided by Envi-met. This makes TRNSYS predictions more accurate. Six window-to-wall ratios are considered in this research, and in each scenario, the electricity demand for cooling is predicted using "Envi-met + TRNSYS". Based on the classification of thermal perception in south Hunan, the TRNSYS predictions of the electricity demand start with 30 °C as the threshold of refrigeration. The analytical results reveal that in a 6-storey residential building with 24 households, in order to maintain the air temperature below 30 °C, the electricity required for cooling buildings with 0% WWR, 20% WWR, 40% WWR, 60% WWR, 80% WWR, and 100% WWR are respectively 0 KW·h, 19.6 KW·h, 133.7 KW·h, 273.1 KW·h, 374.5 KW·h, and 461.9 KW·h. This method considers the influence of microclimate on the exterior wall and improves the accuracy of TRNSYS in predicting the energy demand for indoor cooling.
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Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Frío
/
Microclima
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Int J Environ Res Public Health
Año:
2021
Tipo del documento:
Article
País de afiliación:
China