本文選題：硅膠-氯化鈣 + 復(fù)合吸附劑��； 參考：《大連海事大學(xué)》2014年碩士論文

【摘要】：吸附式制冷是一種可以有效利用低品位能源、使用環(huán)保型制冷劑的綠色制冷技術(shù),它符合當(dāng)前能源、環(huán)境協(xié)調(diào)發(fā)展的總趨勢(shì)。將船舶缸套水余熱、排煙廢熱等低品位熱能用來驅(qū)動(dòng)固體吸附式制冷可以提高新造船的船舶能效設(shè)計(jì)指數(shù)(EEDI)和船舶能效運(yùn)營指數(shù)(EEOI)。然而,單位質(zhì)量吸附劑的制冷功率(SCP)較低限制了固體吸附式制冷的廣泛應(yīng)用,研發(fā)具有再生溫度低且傳熱傳質(zhì)性能高的吸附制冷吸附劑成為解決這一難題的重要任務(wù)。 本文針對(duì)現(xiàn)狀,通過如下幾個(gè)方面對(duì)硅膠-氯化鈣復(fù)合吸附劑的性能進(jìn)行了實(shí)驗(yàn)研究,以期加深對(duì)硅膠-氯化鈣復(fù)合吸附劑的吸附性能和衰減周期的認(rèn)識(shí),本文實(shí)驗(yàn)研究了：(1)給定工況下,不同平均孔徑的A (2～3nm)、B(4～7nm)、C(8～10nm)型硅膠30min內(nèi)的吸附量變化情況；(2)氯化鈣溶液質(zhì)量分?jǐn)?shù)對(duì)A、B、C型硅膠浸漬情況的影響；(3)不同質(zhì)量分?jǐn)?shù)氯化鈣溶液浸漬對(duì)A、B、C型硅膠的吸附性能的影響；(4)氯化鈣溶液浸漬對(duì)硅膠微觀表面形貌的影響；(5)B型硅膠制備的復(fù)合吸附劑衰減周期。實(shí)驗(yàn)結(jié)果表明：(1)隨著吸附時(shí)間的增加,A、B、C型硅膠的吸附量均呈線性增長,相同吸附時(shí)間內(nèi),A型硅膠吸附量最大,C型次之；(2)相同的浸漬時(shí)間內(nèi),隨氯化鈣質(zhì)量分?jǐn)?shù)的增大,A、B、C型硅膠的氯化鈣搭載率均增大,相同質(zhì)量分?jǐn)?shù)氯化鈣溶液浸漬下,A型硅膠的氯化鈣搭載率較小,B、C型硅膠的氯化鈣搭載率較大；(3)浸漬氯化鈣后的A型硅膠的吸附量相對(duì)未浸漬時(shí)大幅降低,浸漬改性后B、C型硅膠的吸附量明顯增加,B型硅膠吸附量增大更為顯著,A型硅膠不適宜用浸漬的方法改性,B、C型硅膠適宜。(4)微觀結(jié)構(gòu)表征設(shè)備下觀測(cè)時(shí),浸漬氯化鈣后的B型硅膠的表面粗糙度增加,凹凸表面結(jié)構(gòu)增多且較為均勻,這有助于其吸附性能的增強(qiáng)；(5)吸附性能增強(qiáng)的改性B型硅膠在重復(fù)使用性能上并未表現(xiàn)出良好效果,重復(fù)使用次數(shù)增多后,其衰減周期減小,吸附性能極大降低。 本文的研究對(duì)硅膠-氯化鈣復(fù)合吸附劑應(yīng)用于實(shí)際吸附式制冷系統(tǒng)的設(shè)計(jì)具有參考價(jià)值。
[Abstract]:Adsorption refrigeration is a kind of green refrigeration technology which can effectively use low grade energy and environmental protection refrigerant. It accords with the general trend of coordinated development of energy and environment. The use of low-grade heat energy, such as waste heat of cylinder liner water and exhaust heat, to drive solid adsorption refrigeration can improve the efficiency design index (EEDII) and the energy efficiency operation index (EEOI) of new shipbuilding. However, the low refrigeration power per unit mass (SCP) limits the wide application of solid adsorption refrigeration. The development of adsorbents with low regeneration temperature and high heat and mass transfer performance has become an important task to solve this problem. In this paper, the properties of silica gel / calcium chloride composite adsorbents are studied through the following aspects, in order to deepen the understanding of the adsorption performance and attenuation period of silica gel and calcium chloride composite adsorbents. In this paper, we have experimentally studied the given working conditions. Effect of concentration of calcium Chloride solution on the Impregnation of silica Gel with different mean pore sizes: effect of calcium Chloride solution on the adsorption performance of ABB- C Type silica Gel by Impregnation of calcium Chloride solution with different mean pore size (A / O _ 2 ~ 3nm ~ (4) ~ (7) nm ~ (1) / A ~ (8 / 10 ~ (10) nm ~ (-1) / A ~ (2 +) / C / C silica Gel with different concentrations of calcium Chloride solution Immersion on the adsorption Properties of ABN C Type silica Gel Effect of calcium chloride solution impregnation on the morphology of silica gel The experimental results show that with the increase of adsorption time, the adsorption capacity of C type silica gel increases linearly with the increase of adsorption time, and the maximum adsorption capacity of C type silica gel is the highest at the same adsorption time, followed by the second type C type silica gel adsorbed at the same adsorption time) in the same impregnation time. With the increase of the mass fraction of calcium chloride, the loading rate of calcium chloride increased with the increase of calcium chloride content. Under the same mass fraction of calcium chloride solution impregnation, the calcium chloride loading rate of the type A silica gel is smaller than that of the BU C type silica gel. The adsorption capacity of the type A silica gel after impregnation with calcium chloride solution is significantly lower than that of the type A silica gel without impregnation. After impregnation, the adsorption capacity of BC- C type silica gel is obviously increased. The adsorption capacity of B type silica gel is much larger than that of B type silica gel. The method of impregnation is not suitable for the modification of B C type silica gel by impregnation. 4) when observed under the equipment of microstructure characterization, After impregnated with calcium chloride, the surface roughness of B type silica gel was increased, and the surface structure of concave and convex was increased and uniform. The modified B type silica gel, which can enhance the adsorbability of silica gel, does not show a good effect on the reuse performance. After the increase of the repeated use times, the decay cycle of modified B type silica gel decreases and the adsorbability decreases greatly. The research in this paper has reference value for the application of silica gel and calcium chloride composite adsorbent in the design of practical adsorption refrigeration system.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U664.5

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