本文選題：城市原生污水 + 污水源熱泵��； 參考：《中國(guó)礦業(yè)大學(xué)》2014年碩士論文

【摘要】：目前，建筑空調(diào)、采暖能耗日益增大。大量的城市污水含有巨大的能量，被污水源熱泵技術(shù)利用后能在很大程度上緩解建筑空調(diào)及采暖方面的能耗壓力。但是目前，國(guó)內(nèi)對(duì)污水源熱泵的研究大部分都側(cè)重于污水源熱泵系統(tǒng)的價(jià)值與前景方面，缺乏基礎(chǔ)理論的指導(dǎo)。城市污水的流動(dòng)特性是污水源熱泵系統(tǒng)水力與換熱工況設(shè)計(jì)計(jì)算的重要問(wèn)題，是系統(tǒng)穩(wěn)定運(yùn)行的關(guān)鍵，由于對(duì)城市污水流動(dòng)特性的研究嚴(yán)重缺乏，因此在管路與換熱設(shè)備的設(shè)計(jì)方面缺少理論依據(jù)。本文圍繞城市原生污水兩相流動(dòng)特性，對(duì)城市原生污水在圓管以及熱管換熱器流道中的流動(dòng)特性、臨界流速以及顆粒的運(yùn)動(dòng)進(jìn)行了分析，旨在為污水冷熱源的應(yīng)用與推廣提供依據(jù)。 由于城市原生污水水質(zhì)的復(fù)雜性，污水源熱泵技術(shù)面臨很多挑戰(zhàn)和困難。本文首先從污水流動(dòng)特性方面著手，運(yùn)用兩相流理論并結(jié)合物理實(shí)驗(yàn)及Fluent數(shù)值模擬，對(duì)污水在圓管中的流動(dòng)性進(jìn)行分析。污水在層流狀態(tài)時(shí)，流速較小，污水中大部分顆粒已經(jīng)沉降管底，懸浮液為兩相流均質(zhì)流體，因此用非牛頓流體模型進(jìn)行分析。在紊流狀態(tài)時(shí)，流速較大，大量顆粒處于懸浮狀態(tài)，用兩相流模型進(jìn)行分析。最終獲得其層流和紊流狀態(tài)下污水的速度分布和阻力損失的計(jì)算方法，對(duì)污水源熱泵系統(tǒng)設(shè)計(jì)和水力計(jì)算提供借鑒和參考。 本文對(duì)污水在一種熱管換熱器中的流動(dòng)性進(jìn)行了分析，該換熱器流道側(cè)壁為并列排置的熱管，流體在每?jī)刹⒘信胖玫臒峁荛g流動(dòng)。為了解該特殊流道下，污水的流動(dòng)特性，本文通過(guò)模擬分析了熱管換熱器的熱管尺寸、截面形狀以及流速大小三個(gè)主要因素對(duì)污水在該特殊流道中流動(dòng)特性的影響，并結(jié)合實(shí)驗(yàn)得到污水在該類(lèi)熱管換熱器中的流動(dòng)阻力系數(shù)計(jì)算式，為該類(lèi)型熱管換熱器優(yōu)化設(shè)計(jì)提供依據(jù)。 污水源熱泵系統(tǒng)中，管道和換熱設(shè)備結(jié)垢和堵塞一直以來(lái)阻礙著污水源熱泵的發(fā)展。本文從污垢的源頭—固相顆粒角度出發(fā)，分析了固相顆粒在圓管不同流速時(shí)以及在熱管換熱器中的不同熱管直徑、不同流道形狀、不同流速時(shí)的運(yùn)動(dòng)軌跡，為污水源熱泵系統(tǒng)防垢方面提供依據(jù)。 本文對(duì)城市原生污水兩相流特性的研究與分析，，為污水源熱泵系統(tǒng)的設(shè)計(jì)及管理提供借鑒和參考，為污水源熱泵技術(shù)的進(jìn)一步研究提供理論依據(jù)
[Abstract]:At present, building air conditioning, heating energy consumption is increasing. A large amount of urban sewage contains huge energy, which can alleviate the energy consumption pressure of building air conditioning and heating to a great extent after being used by sewage source heat pump technology. However, most of the domestic researches on sewage source heat pump are focused on the value and prospect of sewage source heat pump system, which lacks the guidance of basic theory. The flow characteristics of municipal sewage is an important problem in the design and calculation of the hydraulic and heat transfer conditions of sewage source heat pump system, which is the key to the stable operation of the system. Therefore, there is a lack of theoretical basis in the design of pipeline and heat exchanger. In this paper, the flow characteristics, critical velocity and particle movement of urban primary sewage in circular pipe and heat pipe heat exchanger are analyzed around the two-phase flow characteristics. The purpose of this paper is to provide the basis for the application and popularization of sewage cooling and heat sources. Due to the complexity of urban primary sewage water quality, sewage source heat pump technology is facing many challenges and difficulties. In this paper, the flowability of sewage in circular pipes is analyzed by using two-phase flow theory, physical experiments and fluent numerical simulation. In laminar flow, the flow velocity of sewage is small, most of the particles in the sewage have already settled at the bottom of the pipe, and the suspension is a two-phase flow homogeneous fluid, so the non-Newtonian fluid model is used to analyze it. In the turbulent state, the velocity is large and a large number of particles are suspended. The two-phase flow model is used to analyze it. Finally, the calculation method of velocity distribution and resistance loss of sewage under laminar and turbulent conditions is obtained. In this paper, the fluidity of sewage in a heat pipe heat exchanger is analyzed. The side wall of the channel of the heat exchanger is a heat pipe arranged in parallel. Fluid flows between two parallel heat pipes. In order to understand the flow characteristics of sewage in this special channel, the influence of three main factors, such as the size of heat pipe, the shape of cross section and the flow rate of heat pipe heat exchanger, on the flow characteristics of sewage in the special channel is analyzed by simulation in this paper. The calculation formula of flow resistance coefficient of sewage in the heat pipe heat exchanger is obtained, which provides the basis for the optimal design of the heat pipe heat exchanger. Fouling and blocking of pipes and heat exchangers have been hindering the development of sewage source heat pumps. In this paper, from the point of view of the source of fouling-solid particles, the motion trajectories of solid particles at different flow rates in circular tubes and in heat pipe heat exchangers with different heat pipe diameters, different flow channel shapes and different flow rates are analyzed. This paper studies and analyzes the characteristics of urban sewage two-phase flow, and provides reference for the design and management of sewage source heat pump system. Provide theoretical basis for further research of sewage source heat pump technology
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TU83

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