本文選題：吸附式制冷 + 化學(xué)吸附�。� 參考：《青島科技大學(xué)》2014年碩士論文

【摘要】：吸附式制冷采用環(huán)境友好型吸附劑，可有效利用低品位熱源，在環(huán)保節(jié)能方面有著傳統(tǒng)壓縮式制冷所不能擁有的優(yōu)勢，因此受到廣泛的重視。然而吸附式制冷要實(shí)現(xiàn)實(shí)際應(yīng)用還存在著不少問題，工質(zhì)對化學(xué)反應(yīng)需要花費(fèi)大量的時間，使得整個系統(tǒng)循環(huán)周期較長，，這是吸附式制冷沒有得到廣泛應(yīng)用的主要原因。如何提高制冷系統(tǒng)的制冷效率是當(dāng)今吸附式制冷研究中的重點(diǎn)內(nèi)容。 本文中的吸附式制冷系統(tǒng)系統(tǒng)為以太陽能為主要能量來源，制冷劑為氨，吸附劑采用氯化鈣。為了研究影響系統(tǒng)制冷效率的因素，本文使用Matlab/Simulink軟件對吸附制冷系統(tǒng)進(jìn)行了仿真。本文的主要工作和成果如下： （1）在分析基本吸附制冷循環(huán)的基礎(chǔ)上，建立了吸附制冷熱力過程中的計(jì)算表達(dá)式.采用Matlab/Simulink模擬手段對氯化鈣-氨制冷工況對制冷性能的影響進(jìn)行了熱力計(jì)算及分析.本文研究了不同解吸終了溫度、蒸發(fā)溫度、冷凝溫度、吸附終了溫度對系統(tǒng)COP的影響。經(jīng)過分析發(fā)現(xiàn)，解吸終了溫度在90℃附近時系統(tǒng)COP達(dá)到最大值，提高蒸發(fā)溫度，降低冷凝溫度和吸附終了溫度有利于系統(tǒng)COP的提高。 （2）設(shè)計(jì)了一個太陽能連續(xù)吸附式制冷系統(tǒng)，包括氨蒸發(fā)器、氨冷凝器及兩個吸附床，采用Matlab/Simulink對系統(tǒng)進(jìn)行模塊化仿真。通過仿真結(jié)果，得到了吸附床溫度的變化規(guī)律，分析了熱水箱容積、冷凝溫度、蒸發(fā)溫度、循環(huán)時間對制冷效率的影響，為以后的實(shí)驗(yàn)研究提供理論依據(jù)。
[Abstract]:Adsorption refrigeration adopts environment-friendly adsorbent, which can effectively utilize low-grade heat source. It has the advantage of traditional compression refrigeration in environmental protection and energy saving, so it has been paid more and more attention. However, there are still many problems in the practical application of adsorption refrigeration. It takes a lot of time for the chemical reaction and the cycle period of the whole system is longer, which is the main reason why adsorption refrigeration has not been widely used. How to improve the refrigeration efficiency of refrigeration system is the focus of adsorption refrigeration research. In this paper, the adsorption refrigeration system is composed of solar energy as the main energy source, ammonia as the refrigerant and calcium chloride as the adsorbent. In order to study the factors affecting the refrigeration efficiency of the system, the adsorption refrigeration system is simulated by Matlab / Simulink software. The main work and achievements of this paper are as follows: (1) based on the analysis of the basic adsorption refrigeration cycle, the computational expressions of the adsorption refrigeration thermodynamic process are established. The thermodynamic calculation and analysis of the effect of calcium chloride and ammonia refrigeration on the refrigeration performance were carried out by Matlab / Simulink method. The effects of desorption temperature, evaporation temperature, condensation temperature and adsorption end temperature on the cop of the system are studied in this paper. After analysis, it was found that the cop of the system reached the maximum when the desorption temperature was about 90 鈩

本文編號：2097859