熱敏性改質矽膠材料應用於吸附式空調探討

Silica Gel Impregnated with Thermosensitive Macromolecular Material on Adsorption Air-Conditioner

康育豪 ； 陳威宏

《冷凍空調與能源科技雜誌》 83期 (2013/10) Pp. 42-49

摘要

吸附式空調技術主要可分成吸附材料技術、熱交換覆載技術與系統整合操作等三方面，其中吸附材料性能為主要關鍵因子，其特性將影響整體吸附式空調設備之COP值與SCP值，將了獲得更高吸附式空調設備之COP值，必須針對吸附材料進行改質或研發新型吸附材料，以降低吸附材料脫附溫度，並增加其吸附與脫附速率。故本研究目標在開發一種新式熱敏式吸附空調材料，藉由有機溫敏材料（Thermosensitive）於多孔性材料表面改質，使吸附材料於不同溫度調控下，其孔洞表面呈現可逆之親、疏水性（hydrophobic and hydrophilic）特性變化，並藉此熱致變表面親／疏水性特性與機制，來降低脫附再生時所需溫度，並提升的吸／脫附速率，若能開發成功，將可有效提升吸附空調系統能效，大幅降低以熱能趨動之吸附空調系統設置面積與成本。本研究結果顯示於160℃脫附溫度下，未改質矽膠吸附劑其飽和水氣吸附量可達19.4% wt；而以PNIPAAm覆載比例（1：0.2）改質矽膠吸附劑，雖然其飽和吸附量降至16.8% wt，然而於較低脫附溫度100℃時，未改質矽膠之水氣吸附量只有12.0% wt；而以PNIPAAm覆載比例（1：0.2）改質之水氣吸附量則可達14.3% wt。故以適當比例PNIPAAm改質修飾矽膠孔洞表面，將可於較低溫度下再生吸附劑，並提升吸附／脫附水氣量約19%。

關鍵字

吸附式空調 ； 親水性與疏水性 ； 吸附與脫附 ； 熱敏性材料

並列摘要

Adsorption air-conditioner technology is mainly divided into adsorbent material technology, heat exchanger coating technology and systems integration. The adsorbent material property is as key factor to affect adsorption air-conditioner equipment's COP and SCP. It is crucial to develop innovative adsorbent material for higher COP of adsorption air-conditioner by decreasing desorption temperature and increasing adsorption and desorption rate. This study aimed to develop a novel thermosensitive adsorbent in adsorption air conditioner application. By impregnated thermosensitive (PNIPAAm) onto the intra-porous surface, the property of surface could alter hydrophilic and hydrophobic at different temperature to decrease desorption temperature and reduce desorption energy consumption. The experimental results indicated that the adsorption capacity of pure silicone gel and modified silicone gel impregnated with the ratio of 1:0.2 silicone gel/PNIPAAm are 19.4% wt and 16.8% wt, respectively, at 160℃ desorption temperature. However, when desorption temperature decreased to 100℃, the desorption water ratio of pure silicone gel and modified silicone gel are 12% wt and 14.3% wt. The results revealed that silicone gel impregnated appropriately with thermosensitive (PNIPAAm) improve the desorption capacity 19% at as low temperature as 100℃.

並列關鍵字

adsorption air conditioner ； hydrophilic and hydrophobic ； adsorption and desorption ； temperature-sensitivity materials