Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/1785
標題: 以SWS-1L複合吸附劑/水為工作配對之一個吸附式熱泵之性能分析
Performance analysis of an adsorption heat pump: SWS-1L composite adsorbent/water as the working pair
作者: 許惠琦
Hsu, Hui-Chi
關鍵字: adsorption heat pump
吸附式熱泵
COP
specific cooling capacity
adsorption heat
exergy
second law of thermodynamics
冷卻性能係數
冷卻能力
吸附熱
Exergy
熱力學第二定律效率
出版社: 機械工程學系所
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摘要: 此研究以電腦模擬分析探討一個多床吸附式熱泵使用一種複合吸附劑時之冷卻性能係數(COP)與冷卻能力(QE),研究中並進行系統之熱力學第二定律之分析。此研究使用具固體側質傳阻抗之模式,所考慮之吸附劑與冷媒分別為SWS-1L複合吸附劑(氯化鈣孕育於KSK矽膠中)與水,冷卻(或加熱)流體之溫度乃考慮為流道位置與時間之函數,而吸附熱則為吸附劑之溫度(Tb)與冷媒含量(W)之函數。分析中分別改變週期操作時間(4τ)與加熱流體溫度(亦指改變再生溫度,TG),以探討操作條件對系統之COP與QE之影響,結果顯示,在最大冷卻能力之條件下,使用複合吸附劑可有效地提昇系統之COP達51%與QE達38.4%。此研究將輸入系統之流動熱源以Exergy之方式表示之,在TG為100℃與τ為360秒之操作條件下發現,此系統之第二定律效率為20.4%,而各元件中之Exergy之損耗又以吸附器中之預熱與預冷過程為最多,其中前者佔總損耗量之28.96%,而後者則佔41.55%。
Two work deals with the computer analysis of the COP and specific cooling capacity (QE) of a muti-bed adsorption heat pump, which was a composite adsorbent in adsorbing water. A second-law analysis was also conducted to analyze the exergy loss in the heat pump. The computer analysis adopted a solid-side mass-diffusion resistance model. A composite adsorbent (KSK silica gel impregnated with CaCl2) and water were selected as the adsorption pair. The temperature of cooling/heating fluid is a function of location and time and the adsorption heat is a function of adsorbent temperature (Tb), and refrigerant content (W). In the analysis, the effect of cycle time (4τ) and regeneration temperature (TG) on the COP and QE were investigated. The result reveals that, at the maximum QE, using the composite adsorbent can effectively upgrade the COP up to 51% and the QE up to 38.4%. The moving heating source is expressed as exergy input to the adsorber. At the TG of 100℃ and τ of 360 seconds, the result shows that the second-law efficiency of the heat pump is 20.4%. The exergy loss is mainly induced in the preheating process and precooling process. The former results in a 28.96% of the total loss and the latter is 41.55%.
URI: http://hdl.handle.net/11455/1785
其他識別: U0005-0308200717195000
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-0308200717195000
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