本文關(guān)鍵詞：工業(yè)園區(qū)天然氣冷熱電聯(lián)產(chǎn)系統(tǒng)技術(shù)經(jīng)濟(jì)性分析　出處：《中南大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

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【摘要】：冷熱電聯(lián)產(chǎn)系統(tǒng)建立在能量的梯級利用基礎(chǔ)上,具有高效、環(huán)保、可靠性高等優(yōu)點(diǎn),隨著西氣東輸工程的進(jìn)一步拓展和對環(huán)境保護(hù)問題的日益重視,天然氣冷熱電聯(lián)產(chǎn)將成為我國未來能源技術(shù)的重要發(fā)展方向。如何實(shí)現(xiàn)系統(tǒng)的優(yōu)化設(shè)計(jì),提高系統(tǒng)的技術(shù)經(jīng)濟(jì)性也成為亟待解決的問題。 本文以工業(yè)園區(qū)為研究對象,首先分別從制冷系統(tǒng)能耗和系統(tǒng)(?)效率的角度比較基于汽輪機(jī)、燃?xì)廨啓C(jī)和燃?xì)?蒸汽聯(lián)合循環(huán)機(jī)組的三種區(qū)域冷熱電聯(lián)產(chǎn)系統(tǒng)方案的性能。研究結(jié)果表明,與電壓縮式制冷系統(tǒng)相比,基于燃?xì)廨啓C(jī)、燃?xì)?蒸汽聯(lián)合循環(huán)機(jī)組的吸收式制冷系統(tǒng)能夠降低供冷能耗,對以汽輪機(jī)為原動機(jī)的聯(lián)產(chǎn)系統(tǒng)方案而言,系統(tǒng)需要配置高壓及以上壓力級的汽輪機(jī)�；谌�?xì)廨啓C(jī)和聯(lián)合循環(huán)機(jī)組的聯(lián)產(chǎn)系統(tǒng)(?)效率高于基于汽輪機(jī)的系統(tǒng)。 然后,建立基于燃?xì)?蒸汽聯(lián)合循環(huán)機(jī)組的冷熱電聯(lián)產(chǎn)系統(tǒng)數(shù)學(xué)模型,分析機(jī)組參數(shù)對系統(tǒng)節(jié)能性的影響,并根據(jù)單耗分析理論,找到該聯(lián)產(chǎn)系統(tǒng)能量利用的薄弱環(huán)節(jié),為系統(tǒng)節(jié)能提供方向性指導(dǎo)。研究結(jié)果表明,提高余熱鍋爐高壓蒸汽壓力,降低蒸汽溫度有利于提高冷熱電聯(lián)產(chǎn)系統(tǒng)的相對節(jié)能率。低壓蒸汽參數(shù)對聯(lián)產(chǎn)系統(tǒng)的性能影響較小,但對余熱鍋爐的當(dāng)量熱效率影響較大。燃燒室和余熱鍋爐是系統(tǒng)能量利用過程中的薄弱環(huán)節(jié)。 最后,計(jì)算比較了不同區(qū)域供冷供熱冷熱源方案在長沙地區(qū)的全年能耗和經(jīng)濟(jì)性。與常規(guī)中央空調(diào)系統(tǒng)相比,區(qū)域供冷供熱可顯著降低冷熱源系統(tǒng)的年一次能耗。蒸汽吸收式制冷機(jī)+水源熱泵的聯(lián)產(chǎn)型區(qū)域冷熱源方案的年一次能耗最低,但其全壽命周期成本較高。本文研究結(jié)果對區(qū)域冷熱電聯(lián)產(chǎn)系統(tǒng)的優(yōu)化設(shè)計(jì)有一定參考價值。
[Abstract]:The cogeneration system is based on the cascade utilization of energy and has the advantages of high efficiency, environmental protection and high reliability. With the further development of West-to-East gas transmission project and the increasing attention to environmental protection problems. Natural gas cogeneration of cold, heat and power will become an important direction of energy technology development in China in the future, and how to optimize the design of the system and improve the technical economy of the system has become an urgent problem to be solved. In this paper, the industrial park as the research object, first of all, from the refrigeration system energy consumption and system? The performance of three regional cogeneration systems based on steam turbine, gas turbine and gas-steam combined cycle is compared. The results show that the performance of the system is compared with that of the electric compression refrigeration system. Based on gas turbine, the absorption refrigeration system of gas-steam combined cycle unit can reduce the cooling energy consumption. The system needs to be equipped with steam turbines of high pressure and above. Joint production systems based on gas turbines and combined cycle units? The efficiency is higher than the system based on steam turbine. Then, the mathematical model of cogeneration system based on gas-steam combined cycle is established, and the influence of unit parameters on the energy saving of the system is analyzed, and the theory of unit consumption analysis is used. Find out the weak link of energy utilization of the cogeneration system, and provide directional guidance for energy saving of the system. The research results show that the high pressure steam pressure of the waste heat boiler can be improved. Lowering the steam temperature can improve the relative energy saving rate of the cogeneration system, and the low pressure steam parameters have little effect on the performance of the cogeneration system. The combustion chamber and the waste heat boiler are the weak links in the process of energy utilization. Finally, the annual energy consumption and economy of different district cooling and heating source schemes in Changsha are calculated and compared with those of conventional central air conditioning system. Regional cooling and heating can significantly reduce the annual energy consumption of the cold and heat source system, and the annual energy consumption of the joint generation regional cooling and heat source scheme of the steam absorption refrigerator water source heat pump is the lowest. However, the cost of the whole life cycle is high. The results of this paper have some reference value for the optimization design of the cogeneration system of regional cooling, heat and electricity.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU99;TM61

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