本文選題：太陽(yáng)能熱泵 + 相變蓄熱�。� 參考：《華北電力大學(xué)》2017年碩士論文

【摘要】：隨著能源消耗日益增加和環(huán)境污染問題日益嚴(yán)峻,可再生能源和清潔能源的利用變得尤為重要。為了達(dá)到減少電能消耗的目的,本文提出了一種蓄熱型太陽(yáng)能熱泵液化石油氣(LPG)氣化(Regenerative Direct Expansion Solar Assisted Heat Pump Vaporization,RDX-SAHPV)系統(tǒng),并對(duì)該系統(tǒng)進(jìn)行了動(dòng)態(tài)仿真模擬和理論研究。首先,本文在整理國(guó)內(nèi)外有關(guān)相變蓄熱研究文獻(xiàn)的基礎(chǔ)上,從相變材料、蓄熱周期、裝置結(jié)構(gòu)以及蓄熱容量四方面出發(fā),為RDX-SAHPV系統(tǒng)設(shè)計(jì)了一套相變蓄熱裝置。通過Fluent模擬軟件中的熔化/凝固模型對(duì)不同半徑的蓄熱球體進(jìn)行模擬,得出半徑為60mm的蓄熱球體蓄/放熱時(shí)間比較合理、便于加工且蓄熱球殼不會(huì)占用蓄熱水箱過多的蓄熱體積。此外,通過計(jì)算相變蓄熱裝置不同蓄熱容量下的年投資成本和年運(yùn)行成本,得出蓄熱裝置蓄熱容量為40MJ時(shí)回收期最低。其次,文中提出并設(shè)計(jì)了RDX-SAHPV系統(tǒng),介紹了該系統(tǒng)的工作原理,分析了系統(tǒng)的運(yùn)行條件及控制策略,并且詳細(xì)研究了系統(tǒng)的十四種運(yùn)行模式,得出該系統(tǒng)可根據(jù)氣象條件和用氣負(fù)荷的變化,選擇最佳的運(yùn)行模式。最后,建立了RDX-SAHPV系統(tǒng)的動(dòng)態(tài)仿真模型,包括DX-SAHP模型、蓄熱水箱和相變蓄熱水箱模型、氣化器模型、輔助熱源模型和裝置內(nèi)PCM的計(jì)算模型。其中,DX-SAHP系統(tǒng)模型采用集總參數(shù)法,相變蓄熱模型采用有限體積法。在建立了RDX-SAHPV系統(tǒng)數(shù)學(xué)模型的基礎(chǔ)上,以北京某1000戶居民的住宅小區(qū)為供氣對(duì)象,采用Matlab軟件對(duì)RDX-SAHPV系統(tǒng)進(jìn)行動(dòng)態(tài)仿真模擬,得出系統(tǒng)全年的運(yùn)行情況,并對(duì)系統(tǒng)全年的運(yùn)行特性進(jìn)行深入的理論研究。通過對(duì)模擬結(jié)果進(jìn)行分析,得出RDX-SAHPV系統(tǒng)全年具有較高的供熱性能,冬季最低的COP能達(dá)到2.76,夏季最高的COP能達(dá)到3.42,年平均COP為3.12。此外,RDX-SAHPV系統(tǒng)中相變蓄熱水箱的設(shè)置使DX-SAHP的工作時(shí)間延長(zhǎng)了11.6%,DX-SAHP的耗電量增加了532k Wh,輔助熱源的耗電量減少了1694k Wh,每年節(jié)省的電能約為1162k Wh,電能消耗減少了14%,提高了系統(tǒng)的經(jīng)濟(jì)性和環(huán)保性。
[Abstract]:With the increasing of energy consumption and environmental pollution, the utilization of renewable energy and clean energy becomes more and more important. In order to reduce power consumption, a regenerative direct expansion solar Assisted heat pump Vaporization- RDX-SAHPV system is proposed in this paper, and the dynamic simulation and theoretical study of the system are carried out. First of all, based on the literature about phase change heat storage at home and abroad, this paper designs a phase change heat storage device for RDX-SAHPV system from four aspects: phase change material, heat storage period, device structure and heat storage capacity. By using the melting / solidification model in fluent simulation software, the heat storage sphere with different radius is simulated. It is concluded that the storage / exothermic time of the regenerative sphere with radius 60mm is reasonable. Easy to process and heat storage spherical shell does not take up too much heat storage tank volume. In addition, by calculating the annual investment cost and annual operating cost of the phase change heat storage unit under different storage capacity, it is concluded that the recovery period is the lowest when the heat storage capacity of the device is 40 MJ. Secondly, the RDX-SAHPV system is proposed and designed, the working principle of the system is introduced, the operating conditions and control strategies of the system are analyzed, and the 14 operation modes of the system are studied in detail. It is concluded that the system can select the best operation mode according to the change of meteorological conditions and gas load. Finally, the dynamic simulation model of RDX-SAHPV system is established, including DX-SAHP model, storage tank model and phase change storage tank model, gasifier model, auxiliary heat source model and PCM calculation model. The lumped parameter method is used in the DX-SAHP system model and the finite volume method is used in the phase change heat storage model. On the basis of establishing the mathematical model of RDX-SAHPV system, taking the residential district of 1000 residents in Beijing as the gas supply object, the dynamic simulation of RDX-SAHPV system is carried out by using Matlab software, and the running situation of the system throughout the year is obtained. And the operating characteristics of the system throughout the year in-depth theoretical research. By analyzing the simulation results, it is concluded that the RDX-SAHPV system has high heating performance in the whole year, the lowest cop in winter is 2.76, the highest cop in summer is 3.42, and the annual average cop is 3.12. In addition, the installation of phase change storage tank in RDX-SAHPV system prolongs the working time of DX-SAHP by increasing the power consumption of DX-SAHP by 532 kWh. the power consumption of auxiliary heat source decreases by 1694kWh. the annual energy saving is about 1162kWh. The economy and environmental protection of the system.
【學(xué)位授予單位】：華北電力大學(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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