本文選題：礦井回風(fēng) + 熱能回收��； 參考：《天津大學(xué)》2013年博士論文

【摘要】：礦井回風(fēng)中含有大量的余熱資源，礦井回風(fēng)熱能回收系統(tǒng)與水源熱泵系統(tǒng)聯(lián)合應(yīng)用為有效回收回風(fēng)中的余熱資源創(chuàng)造了條件。針對熱能回收系統(tǒng)中的關(guān)鍵環(huán)節(jié)——熱濕交換單元在評價(jià)、設(shè)計(jì)和應(yīng)用中存在的主要問題，，本文以熱濕交換單元內(nèi)氣-水熱濕傳遞為主要研究對象，提出了單元的性能評價(jià)方法、最優(yōu)傳熱途徑及結(jié)構(gòu)的設(shè)計(jì)方法，為熱濕傳遞理論及工程應(yīng)用提供了理論參考。 首先在已有的擴(kuò)散塔及噴水室性能評價(jià)指標(biāo)的基礎(chǔ)上，分析了傳統(tǒng)的“雙效率”法的不適用性，提出了適用于評價(jià)飽和線附近以水為處理對象的熱濕交換單元的性能指標(biāo)，并推導(dǎo)了相應(yīng)的無量綱理論表達(dá)式，為理論及實(shí)驗(yàn)研究提供了理論依據(jù)。 在已有的水滴運(yùn)動規(guī)律及受力分析的基礎(chǔ)上，詳細(xì)推導(dǎo)了下噴式和上噴式熱濕交換單元內(nèi)水滴的運(yùn)動規(guī)律；提出了避免漂水損失和懸浮現(xiàn)象的條件式；分析了初參數(shù)對水滴運(yùn)動規(guī)律的影響；得到在一定條件下，增大氣流速度有利于延長水滴停留時(shí)間的結(jié)論；提出了擋水板與上噴式噴嘴距離的計(jì)算方法。 綜合一維下噴式水滴運(yùn)動方程、傳熱傳質(zhì)模型、濕空氣-水的分析模型及分析模型，通過對模型的數(shù)值求解，研究了夏季工況和冬季工況熱濕交換單元內(nèi)熱濕傳遞過程推動力的變化情況及影響因素，提出了降低熱濕傳遞過程“不可逆”損失的最優(yōu)熱濕傳遞途徑，為濕空氣-水熱學(xué)分析理論以及優(yōu)化方案的設(shè)計(jì)提供理論參考。 以上述理論研究成果為依據(jù)，利用流場模擬軟件對工程設(shè)計(jì)中常用熱濕交換單元物理模型進(jìn)行完善，提出了一種流場較優(yōu)的結(jié)構(gòu)設(shè)計(jì)方案。 最后綜合本文的研究成果，提出了一種適用于回風(fēng)熱能回收系統(tǒng)的下噴式熱濕交換單元的設(shè)計(jì)方法，為工程應(yīng)用提供了設(shè)計(jì)依據(jù)。
[Abstract]:There are a lot of waste heat resources in the return air of the mine. The combined application of the heat recovery system and the water source heat pump system creates the conditions for the effective recovery of the waste heat resources in the return air. In view of the main problems existing in the evaluation, design and application of the heat and moisture exchange unit, a key link in the heat recovery system, the gas-water heat and moisture transfer in the heat and humidity exchange unit is taken as the main research object in this paper. The performance evaluation method, the optimal heat transfer path and the design method of the structure of the unit are presented, which provide a theoretical reference for the theory of heat and moisture transfer and the engineering application. Firstly, on the basis of the existing performance evaluation indexes of diffusion tower and water spraying chamber, the inapplicability of the traditional "double efficiency" method is analyzed, and the performance index of the heat and moisture exchange unit which takes water as the treatment object near the saturation line is put forward. The corresponding dimensionless theoretical expressions are derived, which provides a theoretical basis for theoretical and experimental research. On the basis of the analysis of droplet motion and force analysis, the motion law of droplet in heat and humidity exchange unit is deduced in detail, and the conditional formula to avoid the loss of floating water and suspension is put forward. The influence of initial parameters on the droplet motion is analyzed. The conclusion is drawn that increasing the velocity of air flow is favorable to prolong the residence time of water droplet under certain conditions and the calculation method of the distance between the baffle and the spray nozzle is put forward. The equations of motion of water droplets, heat and mass transfer model, wet air-water analysis model and analysis model are synthesized, and the numerical solution of the model is given. The change of driving force of heat and moisture transfer process in the heat and moisture exchange unit in summer and winter conditions and its influencing factors are studied. The optimal heat and moisture transfer path to reduce the irreversible loss of heat and moisture transfer process is put forward. It provides a theoretical reference for the theory of wet air-hydrothermal analysis and the design of optimization scheme. Based on the above theoretical research results and using the flow field simulation software to perfect the physical model of the heat and moisture exchange unit commonly used in the engineering design, a better structural design scheme of the flow field is proposed. Finally, based on the research results of this paper, a design method of down-jet heat and moisture exchange unit suitable for backair heat recovery system is put forward, which provides the design basis for engineering application.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2013
【分類號】：TD72;TK115

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本文編號：1872517