熱・換気回路網解析を用いた設計時における自然換気運用計画検討手法の提案

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書誌事項

タイトル別名
  • OPERATION PLANNING OF NATURAL VENTILATION SYSTEM UTILIZING NETWORK SIMULATION
  • 熱・換気回路網解析を用いた設計時における自然換気運用計画検討手法の提案 : 建物利用者及び管理者視点に立った自然換気システムの運用最適化(第1報)
  • ネツ ・ カンキ カイロモウ カイセキ オ モチイタ セッケイジ ニ オケル シゼン カンキ ウンヨウ ケイカク ケントウ シュホウ ノ テイアン : タテモノ リヨウシャ オヨビ カンリシャ シテン ニ タッタ シゼン カンキ システム ノ ウンヨウ サイテキカ(ダイ1ポウ)
  • 建物利用者及び管理者視点に立った自然換気システムの運用最適化（第1報）
  • Operational optimization of natural ventilation system considering building user and operator points of view

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抄録

 The number of building installing natural ventilation system is increasing. On the other hand, some of them have stopped the operations or regulated the operational periods due to the complaints from the occupants. A mature operational planning at a building design stage is highly demanded to operate the system optimally both to increase the occupant's satisfaction and to reduce the building energy consumption. This study proposes a method to plan the operation scheme at the design stage utilizing an energy simulation combining an airflow network simulation. The results obtained through a case study are as follows:<br> · Two causes of occupants' dissatisfactions, cold draft and frequent open and close due to cooling operation during naturally ventilated period, are observed in the case that open and close scheme of the natural vents is controlled only by outdoor climate conditions, e.g. outdoor temperature.<br> · The cold draft problem can be avoided by arranging the lower temperature limit of intake outdoor air. The lower limit can be set by utilizing the relationship between outdoor climate and realized indoor climate during naturally ventilated period. However, the arrangement could reduce the total hour of naturally ventilated period through the potential season.<br> · The arrangement to control the opening area in two steps is not sufficient to avoid the cold draft problem. However, the measure could work to extend the total hour of naturally ventilated period. The phenomenon can solve the problem arisen in the arrangement of the lower temperature limit of intake outdoor air.<br> · A control method combining above noted two measures works effectively to avoid the cold draft problem and the decrement of naturally ventilated period. In this case, a matured feedforward control system is required to determine the daily operation every day. An adjustment utilizing the operational history including Artificial Intelligence (AI) applications have a potential for the improvement of the feedforward control.<br> · The natural vents are prohibited to be opened again through the day when it closed due to the cooling operation. But no significant change is observed in term of the total operation hours and energy saving effects.<br> The above noted knowledge can be used for generic natural ventilation designs, even though they are outputs from a simulation result using a specific office model and weather data. However minor changes might be observed when the employed natural ventilation strategy changes or when the other weather data is applied. The future study will focus on these topics. Moreover, the application to the real building design is in progress and we are planning to report them in the future reports.

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