發(fā)布時(shí)間：2018-04-16 10:41

  本文選題：吸收式制冷 + 混合制冷劑��； 參考：《浙江大學(xué)》2014年碩士論文

【摘要】：隨著能源短缺與環(huán)境污染等問(wèn)題的日益嚴(yán)重,降低能耗、提高能源的綜合利用率,成為解決能源問(wèn)題的根本途徑之一。吸收式制冷是一種可以利用余熱、廢熱、太陽(yáng)能熱等低品位驅(qū)動(dòng)熱源的制冷方式,傳統(tǒng)吸收式制冷機(jī)受其工質(zhì)對(duì)和循環(huán)結(jié)構(gòu)的制約,不適宜在深低溫領(lǐng)域應(yīng)用。在既有大量余熱存在,又需要深低溫冷凍的場(chǎng)合,混合制冷劑吸收式制冷系統(tǒng)具有獨(dú)特的優(yōu)勢(shì),越來(lái)越受到人們的關(guān)注。本文在廣泛閱讀文獻(xiàn)基礎(chǔ)上,對(duì)采用混合制冷劑的LHR (Linde-Hampson refrigerator)吸收式制冷循環(huán)和一次分凝吸收式制冷循環(huán)進(jìn)行了理論分析,并且搭建了混合制冷劑吸收式制冷實(shí)驗(yàn)裝置進(jìn)行了實(shí)驗(yàn)研究。主要研究?jī)?nèi)容和成果如下： (1)對(duì)采用R23/R134a/DMF和R23/R227ea/DMF的LHR和一次分凝吸收式制冷系統(tǒng)的循環(huán)性能進(jìn)行了理論優(yōu)化分析,得到了循環(huán)最佳壓力位和最佳濃度的優(yōu)化方法及相應(yīng)的優(yōu)化結(jié)果。 (2)搭建了LHR吸收式制冷系統(tǒng)循環(huán)和一次分凝吸收式制冷系統(tǒng)的循環(huán)性能實(shí)驗(yàn)裝置,并實(shí)驗(yàn)研究了制冷劑主節(jié)流閥、制冷劑釜底節(jié)流閥、溶液流量、制冷劑濃度、發(fā)生器和吸收器液位對(duì)系統(tǒng)性能的影響。 (3)實(shí)驗(yàn)中發(fā)現(xiàn),制冷劑主節(jié)流閥的開(kāi)度、冷凝溫度和發(fā)生溫度對(duì)系統(tǒng)高壓均有較大影響,釜底節(jié)流閥開(kāi)度,蒸發(fā)溫度和吸收溫度對(duì)系統(tǒng)低壓均有較大影響。 (4)實(shí)驗(yàn)中,在一次分凝吸收式制冷循環(huán)中獲得了比LHR吸收式制冷循環(huán)低的制冷溫度,在一定程度上驗(yàn)證了理論分析結(jié)果的正確性。
[Abstract]:With the increasingly serious problems of energy shortage and environmental pollution, reducing energy consumption and improving the comprehensive utilization of energy become one of the fundamental ways to solve the energy problem.Absorption refrigeration is a kind of refrigeration method which can be driven by low grade heat sources such as waste heat, waste heat, solar heat, etc. The traditional absorption refrigerator is not suitable for application in deep and low temperature field because of its working fluid pair and cycle structure.In the situation where there is not only a lot of waste heat, but also need deep cryopreservation, the mixed refrigerant absorption refrigeration system has its unique advantages and has been paid more and more attention.On the basis of extensive reading of the literature, this paper makes a theoretical analysis of the LHR Linde-Hampson frigerator absorption refrigeration cycle and the primary condensed absorption refrigeration cycle using the mixed refrigerant.And the experimental device of mixed refrigerant absorption refrigeration was built.The main contents and results of the study are as follows:1) the cycle performance of LHR and primary condensing absorption refrigeration system with R23/R134a/DMF and R23/R227ea/DMF is analyzed theoretically, and the optimal pressure potential and concentration of the cycle are obtained and the corresponding optimization results are obtained.The cycle performance experimental equipment of LHR absorption refrigeration system and primary condensing absorption refrigeration system is built, and the refrigerant main throttle valve, bottom throttle valve, solution flow rate and refrigerant concentration are studied experimentally.The effect of liquid level of generator and absorber on system performance.In the experiment, it is found that the opening degree, condensation temperature and occurrence temperature of the refrigerant main throttle valve have great influence on the high pressure of the system, and the opening degree of the throttle valve at the bottom of the kettle, the evaporation temperature and the absorption temperature have great influence on the low pressure of the system.In the experiment, the refrigeration temperature is lower than that of LHR absorption refrigeration cycle in the primary condensing absorption refrigeration cycle, which verifies the correctness of the theoretical analysis to a certain extent.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TB64

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