貨櫃擁有的改造靈活性、低成本、高機動等優點使其被廣泛應用於醫療、救災等用途，在疫情爆發的當下，使用貨櫃改裝為篩檢站是常見的方式。篩檢站為防止室外汙染空氣侵入室內，會以較高的換氣次數以確保室內維持正壓，而高換氣次數十分不利換氣及空調設備節能，且目前各國醫療空間設規範並未明確訂出篩檢空間的建議換氣次數。故本研究利用現場實測與CFD模擬工具，以探討20呎貨櫃改裝的篩檢站之合適換氣次數。評斷標準主要從室內壓差值及室內舒適性兩方面探討，室內壓差值的高低與貨櫃外殼的開口大小、氣密性程度有關；室內舒適性則與溫溼度、二氧化碳濃度、空調設定溫度有關，期望能將實驗所得資訊做為日後20呎貨櫃篩檢站改裝的參考資訊。
研究結果顯示，若可增強外殼氣密性並減少開口大小，則以較低的換氣次數即可達到室內正壓標準，且該換氣次數相當接近各國規範之正壓病房、潔淨作業區的換氣次數建議區間。而若要在室外高溫高濕的情況下保持在舒適的溫溼度區間，則應選擇較低的換氣次數及較低的空調設定溫度。經綜合考量後，本研究建議以10ACH作為貨櫃篩檢站之換氣次數，將搭配空調溫度設定為24℃、室內使用人數3人，即可使室內維持正壓+2.5Pa、溫度25-26℃、二氧化碳濃度1000ppm以下。此外，由於風機的耗電量高於風扇許多，若可確保進氣位置附近的外氣不受汙染，則可使用風扇作為換氣設備。

The flexibility, low cost, and high mobility of containers have made them widely used in medical, disaster relief and other purposes. During the epidemic, it is a common way to use containers to convert into screening stations. In order to prevent outdoor polluted air from entering the room, the screening station will use a high ventilation rate to ensure that the room maintains positive pressure. However, the high ventilation rate is not condusive unfavorable for energy saving, and there is no recommendation about the ventilation rate for the screening station. Therefore, this study uses on-site measurement and CFD simulation tools to explore the appropriate air exchange rate for the 20-foot container screening station. The evaluation standard is mainly discussed from the indoor pressure difference value and indoor comfort. It is hoped that the information obtained from the experiment can be used as reference information for the modification of the 20-foot container screening station in the future.
The results show that if the airtightness of the shell can be enhanced and the size of the opening can be reduced, the indoor positive pressure standard can be achieved with a lower ventilation rate. The lower air change rate and the lower set temperature of the air conditioner should be selected to maintain indoor comfortable temperature and humidity. After comprehensive consideration, this study recommends that 10ACH be used as the air exchange rate of the container screening station.Then the temperature of the air conditioner can be set to 24°C, and the number of users in the room is 3, so that the room can maintain a positive pressure of +2.5Pa and a temperature of 25-26℃, and the carbon dioxide concentration is lower than 1000ppm. In addition, since the power consumption of the centrifugal fan is much higher than the normal exhaust fan,so the normal exhaust fan can be used as a air-intake device if it can ensure that the outside air near the intake position is not polluted.

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