發(fā)布時(shí)間：2018-06-01 02:54

  本文選題：太陽(yáng)能 + 相變蓄熱�。� 參考：《河北工程大學(xué)》2017年碩士論文

【摘要】：面對(duì)日益嚴(yán)峻的環(huán)境危機(jī)以及能源短缺的危機(jī),暖通行業(yè)對(duì)清潔新能源的開(kāi)發(fā)、利用以及技術(shù)進(jìn)行了深入的研究。太陽(yáng)能作為清潔能源在采暖系統(tǒng)中應(yīng)用已經(jīng)相當(dāng)成熟,并取得了經(jīng)濟(jì)和環(huán)保的雙贏。為充分利用新能源,減少一次能源的浪費(fèi)、延長(zhǎng)設(shè)備的使用壽命,相變蓄熱技術(shù)在暖通行業(yè)已經(jīng)慢慢興起。由于地源熱泵長(zhǎng)期運(yùn)行受困因素逐漸很多,并且也會(huì)對(duì)地層的溫度產(chǎn)生影響,所以近幾年空氣源熱泵的應(yīng)用慢慢擴(kuò)大。但空氣源熱泵系統(tǒng)現(xiàn)今急需解決的問(wèn)題是其在低溫環(huán)境中運(yùn)行效率較低、機(jī)組停啟頻繁、機(jī)組使用壽命短。為改善空氣源機(jī)組效率和使用年限,本文對(duì)太陽(yáng)能相變蓄熱耦合空氣源熱泵系統(tǒng)進(jìn)行了實(shí)驗(yàn)研究。太陽(yáng)能相變蓄熱耦合空氣源熱泵系統(tǒng)是通過(guò)太陽(yáng)能真空玻璃管集熱器吸收太陽(yáng)輻射出來(lái)的太陽(yáng)能并將其儲(chǔ)存在相變蓄熱水箱中或與空氣源熱泵相結(jié)合同時(shí)用于供暖。該系統(tǒng)的控制策略為:空氣源熱泵機(jī)組獨(dú)立運(yùn)行能滿足所需熱量時(shí),相變蓄熱水箱將多余的熱量和太陽(yáng)能輻射能進(jìn)行儲(chǔ)存;當(dāng)外界環(huán)境溫度過(guò)低時(shí),空氣源熱泵不能獨(dú)立完成所需熱量時(shí),太陽(yáng)能相變蓄熱耦合空氣源熱泵系統(tǒng)運(yùn)行,太陽(yáng)輻射量充足的情況下,多余的熱量會(huì)被存儲(chǔ);若空氣源熱泵側(cè)有凝霜時(shí),太陽(yáng)能將一部熱量用于提高蒸發(fā)器側(cè)的溫度,克服凝霜現(xiàn)象的出現(xiàn)。通過(guò)實(shí)驗(yàn)驗(yàn)證與軟件模擬的方法對(duì)該系統(tǒng)中相變材料進(jìn)行了研究分析。本文的主要內(nèi)容有:1)介紹了耦合新系統(tǒng)提出的背景,國(guó)內(nèi)外關(guān)于太陽(yáng)能、相變蓄熱、空氣源熱泵的研究現(xiàn)狀與相應(yīng)的技術(shù)水平,并指出現(xiàn)有研究中存在的不足之處,并對(duì)涉及的概念、計(jì)算公式以及應(yīng)用的主要部件進(jìn)行了理論詳述。2)介紹了研究對(duì)象的工程概況和實(shí)驗(yàn)臺(tái)搭建,對(duì)相變材料的選取和蓄熱水箱的設(shè)計(jì)以及其他組成設(shè)備的計(jì)算和選擇依據(jù)進(jìn)行闡述3)通過(guò)比較空氣源熱泵單獨(dú)運(yùn)行和耦合系統(tǒng)運(yùn)行兩種供暖模式,分析系統(tǒng)和機(jī)組的性能系數(shù),驗(yàn)證系統(tǒng)最優(yōu)控制策略的正確性。4)基于前人所建立的相變蓄熱模型,對(duì)空氣源熱泵單獨(dú)運(yùn)行和耦合系統(tǒng)運(yùn)行過(guò)程中蓄熱棒的蓄熱過(guò)程進(jìn)行了模擬分析,研究了相變蓄熱材料的蓄熱特性。研究結(jié)果表明:太陽(yáng)能相變蓄熱耦合空氣源熱泵系統(tǒng)能夠滿足多種工況的運(yùn)行需要,通過(guò)對(duì)COP值得比較以及對(duì)室內(nèi)溫度的監(jiān)測(cè),得出該系統(tǒng)不但可以滿足室內(nèi)溫度的要求,對(duì)于延長(zhǎng)機(jī)組的壽命也有很大的幫助。此外,相對(duì)于獨(dú)立的太陽(yáng)能供暖系統(tǒng)而言,耦合系統(tǒng)的安裝空間大大減小了。
[Abstract]:Facing the increasingly severe environmental crisis and the crisis of energy shortage, HVAC industry has carried out in-depth research on the development, utilization and technology of clean new energy. Solar energy as a clean energy in the application of heating systems has been quite mature, and has achieved a win-win economic and environmental protection. In order to make full use of new energy, reduce the waste of primary energy and prolong the service life of equipment, phase change heat storage technology has been rising slowly in HVAC industry. The application of air source heat pump (GSHP) has been gradually expanded in recent years because there are a lot of trapped factors in the ground source heat pump (GSHP) for a long time and it will also have an effect on the formation temperature. However, the air source heat pump system needs to be solved urgently because of its low efficiency in low temperature environment, frequent shutdown and short service life of air source heat pump system. In order to improve the efficiency and service life of air source units, the solar phase change heat storage coupled air source heat pump system is experimentally studied in this paper. Solar phase change heat storage coupled air source heat pump system is a solar vacuum glass collector which absorbs solar energy from solar radiation and stores it in phase change storage tank or combined with air source heat pump for heating. The control strategy of the system is as follows: when the air source heat pump unit can operate independently to meet the required heat, the phase change storage tank stores the excess heat and solar radiation energy, and when the ambient temperature is too low, When the air source heat pump can not complete the required heat independently, the solar energy phase change regenerative heat storage coupled air source heat pump system will be operated. When the solar radiation is sufficient, the excess heat will be stored; if there is frost on the side of the air source heat pump, Solar energy uses a piece of heat to raise the temperature of the evaporator side to overcome the frost phenomenon. The phase change materials in the system are studied and analyzed by means of experimental verification and software simulation. The main contents of this paper are: (1) introduce the background of the new coupling system, the research status and the corresponding technical level of solar energy, phase change heat storage, air source heat pump at home and abroad, and point out the shortcomings of the existing research. At the same time, the concept, calculation formula and main parts of application are described in detail in theory. 2) the engineering survey of the research object and the construction of the experiment bench are introduced. The selection of phase change materials, the design of storage tank and the calculation and selection basis of other components are expounded. 3) by comparing the two heating modes of air source heat pump operating alone and coupling system, the performance coefficients of the system and the unit are analyzed. The correctness of the optimal control strategy of the system. 4) based on the phase change heat storage model established by the predecessors, the heat storage process of the air source heat pump is simulated and analyzed during the operation of the air source heat pump alone and the coupled system. The heat storage characteristics of phase change thermal storage materials are studied. The results show that the solar phase change heat storage coupled air source heat pump system can meet the needs of various operating conditions. Through the comparison of COP and the monitoring of indoor temperature, it is concluded that the system can not only meet the requirements of indoor temperature. For the extension of the life of the unit also has a lot of help. In addition, the installation space of the coupling system is greatly reduced compared with the independent solar heating system.
【學(xué)位授予單位】：河北工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU83

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