本文選題：太陽(yáng)能集熱 + 有機(jī)郎肯　； 參考：《華中科技大學(xué)》2014年碩士論文

【摘要】：太陽(yáng)能集熱發(fā)電技術(shù)是近年在新能源領(lǐng)域發(fā)展最快，關(guān)注度最高的技術(shù)之一。有機(jī)郎肯循環(huán)太陽(yáng)能熱發(fā)電技術(shù)將太陽(yáng)能集熱與有機(jī)郎肯循環(huán)有效結(jié)合起來(lái)，主要針對(duì)中低溫太陽(yáng)能的利用，多數(shù)采用分布式系統(tǒng)。而其中有機(jī)郎肯發(fā)電技術(shù)在低溫?zé)崮芾梅矫嬉呀?jīng)有相當(dāng)廣泛的應(yīng)用，其對(duì)節(jié)能環(huán)保和余熱利用有著突出的貢獻(xiàn)。作為有機(jī)郎肯循環(huán)中的核心部件有機(jī)工質(zhì)透平膨脹機(jī)，它是循環(huán)中熱功轉(zhuǎn)換的最核心設(shè)備，是系統(tǒng)安全有效運(yùn)行的基礎(chǔ)。而目前應(yīng)用于太陽(yáng)能集熱系統(tǒng)中高效穩(wěn)定的透平膨脹機(jī)尚屬少見，特別是相對(duì)溫度較高范圍內(nèi)的有機(jī)工質(zhì)向心透平的設(shè)計(jì)研究少見。本文即是針對(duì)熱源溫度在300℃工況條件下的有機(jī)工質(zhì)向心透平的設(shè)計(jì)研究，開展了如下工作： 通過(guò)對(duì)中低溫段有機(jī)郎肯太陽(yáng)能系統(tǒng)特點(diǎn)的分析，選擇了向心透平作為其透平形式。在300℃的熱源條件下，選擇了適用的幾種有機(jī)工質(zhì)進(jìn)行了氣動(dòng)方案設(shè)計(jì)和熱力計(jì)算，并對(duì)比分析了幾種不同工質(zhì)的設(shè)計(jì)方案其結(jié)構(gòu)尺寸和經(jīng)濟(jì)性，選擇采用廉價(jià)的工質(zhì)作為首選，試用了甲苯作為工質(zhì)進(jìn)行詳細(xì)的氣動(dòng)設(shè)計(jì)，壓比高達(dá)8，且跨音速流動(dòng)。 利用三維造型軟件進(jìn)行了結(jié)構(gòu)設(shè)計(jì)，設(shè)計(jì)了多種導(dǎo)向葉柵方案與動(dòng)輪結(jié)構(gòu)，設(shè)計(jì)了圓形導(dǎo)向蝸殼。通過(guò)CFD計(jì)算，對(duì)所設(shè)計(jì)的導(dǎo)向葉柵進(jìn)行了研究分析，，對(duì)不同方案進(jìn)行了優(yōu)選，實(shí)現(xiàn)了其斜切部分膨脹達(dá)到跨音速流動(dòng)的設(shè)計(jì)目標(biāo)，對(duì)其斜切部分膨脹及環(huán)狀間隙內(nèi)流動(dòng)進(jìn)行了研究分析，并對(duì)蝸殼的流動(dòng)情況也進(jìn)行了探析。利用CFD計(jì)算結(jié)果反饋到一維設(shè)計(jì)和三維造型，反復(fù)優(yōu)化葉輪結(jié)構(gòu)，改善氣動(dòng)分配方案，最后對(duì)較好的方案進(jìn)行了全尺寸三維數(shù)值模擬計(jì)算，對(duì)其流動(dòng)情況進(jìn)行了詳細(xì)的分析，最終設(shè)計(jì)出優(yōu)化方案，其性能與設(shè)計(jì)誤差較小，效率高于百分之八十五。最后，對(duì)該模型在變流量工況下進(jìn)行了CFD計(jì)算，對(duì)其在變流量情況下性能以及流動(dòng)情況進(jìn)行了探析。
[Abstract]:Solar energy generation technology is one of the fastest-growing and most concerned technologies in the field of new energy in recent years. Organic Rangken cycle solar thermal power generation technology effectively combines solar energy collection with organic Rangken cycle, mainly aiming at the utilization of medium-low temperature solar energy, most of which are distributed systems. The organic Lang Ken power generation technology has been widely used in the use of low temperature heat energy, which has a prominent contribution to energy saving, environmental protection and waste heat utilization. As the core component of the organic Rankin cycle, the organic working fluid turbine expander is the core equipment for the thermal power conversion in the cycle and the basis for the safe and effective operation of the system. At present, the application of high efficiency and stable turbine expander in solar energy collection system is rare, especially the design of organic working fluid centripetal turbine in relatively high temperature range is rare. This paper is aimed at the design and research of the organic working fluid centripetal turbine under the condition of the heat source temperature at 300 鈩

本文編號(hào)：1827997