【摘要】：面對(duì)空調(diào)冷熱源供應(yīng)的多樣性,站在不同的角度可有不同的選擇,煤炭,電力,天然氣被廣泛的用于空調(diào)系統(tǒng)的能源供應(yīng),其價(jià)格的飛漲,使得能源形式十分嚴(yán)峻。因此有人提出在北方集中供暖地區(qū),夏季可以利用熱電廠,城市熱網(wǎng)、換熱站的熱介質(zhì)給城市集中供冷的技術(shù),然而有很多專家對(duì)這一供冷技術(shù)存在疑慮和爭(zhēng)議,因此有必要對(duì)這一問(wèn)題做更深入的研究,本論文對(duì)三種不同能源形式的分布式供冷方式:以熱水為冷源的基于城市熱網(wǎng)夏季供冷,以電為冷源的電制冷,以及以天然氣為冷源的天然氣型供冷方式的能效和經(jīng)濟(jì)性進(jìn)行了深入的分析。本文采用一次能源利用率、一次能源節(jié)能率等綜合效率指標(biāo)概念對(duì)比分析了以上三種供冷方式的燃料和能效差異。深入分析了熱電聯(lián)產(chǎn)的發(fā)電效率和供熱效率,制冷裝置的性能系數(shù),不同燃機(jī)供熱效率等因素對(duì)基于城市熱網(wǎng)夏季供冷模式能效的影響。通過(guò)計(jì)算分析,在相同冷量下電價(jià)、熱價(jià)、氣價(jià)的關(guān)系,提出了臨界熱價(jià),臨界電價(jià),從而得出了基于城市熱網(wǎng)夏季供冷方式供冷成本的經(jīng)濟(jì)性。本文以西安市“金域華府二期”的住宅小區(qū)為例,利用Dest-h模擬軟件計(jì)算確定其冷負(fù)荷指標(biāo)。從初投資和運(yùn)行費(fèi)用兩方面,利用最小費(fèi)用法對(duì)這三種方式進(jìn)行經(jīng)濟(jì)性分析。研究表明在2014年西安市熱價(jià),氣價(jià),電價(jià)的基礎(chǔ)上基于城市熱網(wǎng)(標(biāo)準(zhǔn)熱水的供冷方式并不具備明顯的經(jīng)濟(jì)效益)。
[Abstract]:In the face of the diversity of air conditioning cold and heat sources, there are different options from different angles. Coal, electricity and natural gas are widely used in the energy supply of air conditioning system. The soaring price makes the energy form very severe. Therefore, it has been suggested that in the northern central heating area, the heat medium of thermal power plants, urban heat networks, and heat exchange stations can be used in summer to provide centralized cooling to cities. However, there are many experts who have doubts and disputes about this cooling technology. Therefore, it is necessary to do more research on this problem. In this paper, three kinds of distributed cooling modes with different energy sources are discussed: hot water cooling based on urban heating network in summer, electric refrigeration based on electricity as cold source. The energy efficiency and economy of natural gas cooling mode with natural gas as cold source are analyzed. In this paper, the fuel and energy efficiency differences of the three cooling modes are compared and analyzed by using the concepts of primary energy efficiency, primary energy saving rate and so on. The effects of generation efficiency and heating efficiency of cogeneration, performance coefficient of refrigeration unit and heating efficiency of different gas turbine on energy efficiency of summer cooling mode based on urban heating network are analyzed. Through calculation and analysis, the relationship among electricity price, heat price and gas price under the same cooling capacity is analyzed, and the critical heat price and critical electricity price are put forward, and the economy of cooling cost based on summer cooling mode of urban heating network is obtained. In this paper, taking the residential district of "Jinyu second stage" in Xi'an as an example, the cold load index is determined by Dest-h simulation software. From the aspects of initial investment and operation cost, the economic analysis of these three ways is carried out by using the method of minimum cost. The results show that the heating price, gas price and electricity price of Xi'an city in 2014 are based on urban heat network (the cooling mode of standard hot water has no obvious economic benefit).
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU83

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