A Study of Indoor Air Quality (IAQ) Enhancement and Optimization of Oxygen Generation by Condensed WaterElectrolysis Using KOH and NaOH as Electrolytes

KOH及NaOH濃度對空調冷凝水電解氧氣生成增進室內空氣品質最佳化之量測研究

卓清松(Ching-Song Jwo) ； 簡詔群(Chao-Chun Chien) ； 林承緯(Cheng-Wei Lin)

《中國機械工程學刊》 29卷6期 (2008/12) Pp. 475-481

https://doi.org/10.29979/JCSME.200812.0005

摘要

為了因應節約能源，建築物在建築結構上增加其氣密性，並且減少通風換氣量，致使室內空氣品質(IAQ)惡化，故本研究利用太陽能電解冷凝水改善室內空氣品質，除了氫氣可供作為環保替代能源之外，氧氣更能夠做有價值的利用。利用氧氣引入室內降低其CO2濃度，在維持室內最佳空氣品質之同時，不僅可以減少外氣引入換氣量以降低室內空調換氣負荷，更可維持室內人員的健康。本研究使用不同濃度之NaOH/KOH 電解液，藉由與不同比例之外氣引入量供入室內換氣，以暸解不同室內換氣率與室內不同CO2濃度之下降關係。研究結果發現：在本研究使用之電解液樣本中，以KOH30wt.%電解效果最佳，而若不計太陽能建置成本，在維持室內良好CO2濃度時，節能均可高達至少95.2%以上。
本研究主要的貢獻除了在於減少換氣量達到節能的同時亦能有效降低室內CO2濃度之外，更在因全球暖化造成氣候嚴重變遷的同時，做到雙重減碳的效果，以達到環保、節能及健康三者兼顧的目的。

並列摘要

In order to assure energy conservation, modern buildings have increased the airtightness of their structures, and decreased their ventilation volume, thus leading to a deterioration of indoor air quality (IAQ). With respect to this fact, the study employs condensed water electrolysis by solar energy to improve the IAQ. Besides hydrogen that can serve as substitute energy for environmental protection, oxygen can even offer valuable usages. The inflow of oxygen to indoors can reduce the concentration of CO2. While the optimal IAQ is maintained, not only the indoor ventilation load of air conditioners can be reduced with the decreased inflow of ventilation volume from the outdoors, the health of people indoors can also be maintained. Using NaOH/KOH electrolytes of different concentrations, and through the inflow of the external air of different proportions to indoors for ventilation, the study is able to explain the relationship between the different indoor ventilation rates and the different descending rates of CO2 concentration indoors.

並列關鍵字

water electrolysis ； oxygen generation ； indoor air quality IAQ ； energy conservation