專用式外氣空調系統用於商辦大樓之設計及節能潛力研究

The Assessment and Design of Dedicated Outdoor Air System for the Commercial Office Buildings

伍朕鋒(Jhen-Fong Wu)

指導教授 ： 蔡尤溪

國立臺北科技大學/機電學院/能源與冷凍空調工程系碩士班/碩士(2013年)

摘要

我國政府注重室內空氣品質(IAQ)，於民國101年通過「室內空氣品質管理法」，但過量新鮮外氣的引入，會增加建築物空調之耗能，因而本研究探討與設計一種專用外氣空調系統( DOAS)。本文之研究內容包括DOAS匹配專用的氣冷式空調機、熱交換器性能分析、熱交換管排數與鰭片數設計等。本研究係經過比較各項優缺點性能後採用直膨式冷媒系統，空調箱體積縮小及管路配置簡化皆是其優點。本文以動態建築能源模擬分析作為節能評估之基準，先利用建築動態能源分析軟體(eQUEST)建立3D模型，進行專用外氣空調系統在一整年中對空調耗能的影響。
在節能潛力分析部分，本研究結合辦公大樓中央空調系統，使辦公大樓於夜間或假日加班時，無須啟用大型空調主機設備，仍可供給空調給加班人員使用，且室內空氣品質也不會因此受到影響。由模擬結果發現，在日間運轉模式下，結合DOAS系統在冬季時約節能1.45%，而全年之節能效果較不顯著。而在夜間運轉模式下，結合DOAS空調系統夏月節能約在45.3% ~57.3 %，而夜間模式全年平均節能51.5%。總結除可確保室內空氣品質外，整體相較於一般空調系統全年可節省5.7%之空調耗電用量。

關鍵字

熱交換設計 ； 專用外氣空調系統 ； 室內空氣品質 ； 建築能源節能手法

並列摘要

The government of Taiwan passed the Indoor Air Quality Management Act in 2011, and to maintain indoor air quality is now required by law. However over supply of outdoor air may increase the power consumption of air-conditioning system. Dedicated outdoor air system (DOAS) is studied and designed in this study. The research works include the air-cooled heat exchanger analysis, performance cooler, heat exchange design such as the number of tube rows and fins. After performance comparison direct expansion refrigerant system was selected. The equipment is not only smaller, the simpler piping configuration are also the advantages in the consideration. Building dynamic energy analysis was done by using dynamic simulation analysis software (eQUEST) to create 3D building model for the analysis of the impact of DOAS on energy consumption for air conditioning. It was found that the DOAS as proposed can provide good indoor air quality. The system can also be used to meet the air-conditioning need in the overtime off peak period. This would have the effects of avoiding the operation of the entire central air-conditioning system, especially during night time or public holidays. The results of the simulations show a considerable potential of energy savings with the DOAS operating with central air-conditioning systems. In comparison to the conventional systems in commercial buildings during daytime, the energy saving is 1.45% in the winter. The energy saving is less significant for the full year. However when DOAS is applied to off peak operation, the results show 45.3% to 57.3% of energy saving in the hotter months. Finally the results of DOAS application show annual energy conservation of 5.7% for the entire air-conditioning system.

並列關鍵字

heat changer design ； DOAS ； indoor air quality ； air-conditioning system

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