Evaluation of Building Energy Saving Through the Development of Venetian Blinds’ Optimal Control Algorithm According to the Orientation and Window-to-Wall Ratio
| Autor: | Hyuk Ju Kwon, Keum Ho Lee, Sang Hun Yeon, Kwang Ho Lee |
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| Rok vydání: | 2018 |
| Předmět: |
Building science
Automatic control Computer science business.industry 020209 energy Fossil fuel 02 engineering and technology 010501 environmental sciences Condensed Matter Physics Solar energy Optimal control 01 natural sciences Automotive engineering Renewable energy Thermal 0202 electrical engineering electronic engineering information engineering business Energy (signal processing) 0105 earth and related environmental sciences |
| Zdroj: | International Journal of Thermophysics. 39 |
| ISSN: | 1572-9567 0195-928X |
| DOI: | 10.1007/s10765-017-2350-3 |
| Popis: | As various studies focusing on building energy saving have been continuously conducted, studies utilizing renewable energy sources, instead of fossil fuel, are needed. In particular, studies regarding solar energy are being carried out in the field of building science; in order to utilize such solar energy effectively, solar radiation being brought into the indoors should be acquired and blocked properly. Blinds are a typical solar radiation control device that is capable of controlling indoor thermal and light environments. However, slat-type blinds are manually controlled, giving a negative effect on building energy saving. In this regard, studies regarding the automatic control of slat-type blinds have been carried out for the last couple of decades. Therefore, this study aims to provide preliminary data for optimal control research through the controlling of slat angle in slat-type blinds by comprehensively considering various input variables. The window area ratio and orientation were selected as input variables. It was found that an optimal control algorithm was different among each window-to-wall ratio and window orientation. In addition, through comparing and analyzing the building energy saving performance for each condition by applying the developed algorithms to simulations, up to 20.7 % energy saving was shown in the cooling period and up to 12.3 % energy saving was shown in the heating period. In addition, building energy saving effect was greater as the window area ratio increased given the same orientation, and the effects of window-to-wall ratio in the cooling period were higher than those of window-to-wall ratio in the heating period. |
| Databáze: | OpenAIRE |
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