本文選題：供熱管網(wǎng) + 直埋管道　； 參考：《天津大學(xué)》2014年碩士論文

【摘要】：隨著經(jīng)濟(jì)的蓬勃發(fā)展和人民生活水平的迅速提高,使得人們對(duì)生活環(huán)境的舒適性要求大幅提升,城市集中供熱因?yàn)槠湓诠?jié)約一次能源,改善環(huán)境,提高人民的生活水平等方面的突出優(yōu)點(diǎn),從而得到了飛速發(fā)展。城市供熱管網(wǎng)規(guī)模越來(lái)越大,并且由于城市環(huán)境保護(hù)的要求,許多城市不允許在市內(nèi)建設(shè)城市集中供熱熱源,將熱源建設(shè)在離城區(qū)較遠(yuǎn)的地方,從而導(dǎo)致供熱半徑增大。由于供熱規(guī)模以及供熱半徑的增大,出現(xiàn)了長(zhǎng)距離供熱的情況。長(zhǎng)距離供熱管網(wǎng)對(duì)于大管徑保溫管道的需求很大,管網(wǎng)的敷設(shè)也多采用兩種或兩種以上的敷設(shè)方式。多種敷設(shè)方式相結(jié)合的供熱管網(wǎng)的保溫層厚度的確定,對(duì)于降低整個(gè)管道的初投資和系統(tǒng)的運(yùn)行費(fèi)用、提高效益具有很大意義。對(duì)于大規(guī)模、長(zhǎng)距離供熱管網(wǎng),適當(dāng)設(shè)置中繼泵站,可以有效解決熱網(wǎng)首站循環(huán)水泵電耗過(guò)大以及整個(gè)網(wǎng)路壓力水平過(guò)高等問(wèn)題。本文做了兩部分研究工作,第一部分主要對(duì)同一工程中,同時(shí)采用直埋與架空兩種敷設(shè)方式的供熱保溫管道的保溫厚度進(jìn)行優(yōu)化。結(jié)合工程實(shí)例,通過(guò)對(duì)直埋與架空管道的熱力計(jì)算,并利用經(jīng)濟(jì)學(xué)原理和相關(guān)理念,采用由保溫管道的初投資與運(yùn)行費(fèi)用組成的年均總費(fèi)用最低法計(jì)算管道的經(jīng)濟(jì)保溫厚度。并分析了經(jīng)濟(jì)性因素對(duì)經(jīng)濟(jì)保溫厚度的影響及產(chǎn)生影響的原因,根據(jù)直埋管道保溫設(shè)計(jì)規(guī)范,提出限定管道外表面溫度與優(yōu)化計(jì)算相結(jié)合的方式確定直埋管道的保溫厚度,并分析了相關(guān)因素對(duì)通過(guò)限定管道外表面溫度法所計(jì)算出的保溫厚度的結(jié)果的影響。第二部分主要探討中繼泵站的設(shè)置問(wèn)題,根據(jù)工程實(shí)例,通過(guò)水力計(jì)算及水壓圖的繪制,得出為了滿足水力工況要求需要設(shè)置中繼泵站的結(jié)論,并對(duì)中繼泵站設(shè)置級(jí)數(shù)問(wèn)題進(jìn)行了討論,得到相關(guān)結(jié)果,并證明了對(duì)于輸送距離較長(zhǎng)的供熱管網(wǎng)設(shè)置中繼泵站的優(yōu)點(diǎn)。本文的研究結(jié)論可以為長(zhǎng)距離供熱管網(wǎng)的設(shè)計(jì)提供技術(shù)支持。
[Abstract]:With the rapid development of economy and the rapid improvement of people's living standard, people's requirement for comfort of living environment has been greatly raised. Central heating in cities is saving primary energy and improving the environment. Improve the people's living standards and other aspects of outstanding advantages, which has been rapid development. The scale of urban heating network is getting larger and larger, and because of the requirement of urban environmental protection, many cities do not allow the construction of urban central heating heat source in the city, and build the heat source far away from the urban area, thus leading to the increase of heating radius. Due to the increase of heating scale and radius, long-distance heating occurs. There is a great demand for large diameter heat preservation pipeline in long distance heating network, and two or more kinds of laying methods are used in the laying of pipe network. It is of great significance to determine the thickness of the insulation layer of the heating pipe network combined with various laying methods for reducing the initial investment of the whole pipeline and the operating cost of the system and improving the efficiency. For large-scale, long-distance heating network, proper setting of relay pumping station can effectively solve the problems of excessive power consumption of circulating water pump and high pressure level of the whole network in the first station of heat network. In this paper, two parts of research work have been done. The first part is to optimize the heat preservation thickness of the heating and heat preservation pipeline which adopts two laying ways of direct buried and aerial laying in the same project. Combined with engineering examples, the economic insulation thickness of pipeline is calculated by means of thermodynamic calculation of directly buried and overhead pipelines, using economic principles and related concepts, and using the lowest annual annual total cost method, which consists of initial investment and operation cost of thermal insulation pipeline. The influence of economic factors on the economic insulation thickness and its causes are analyzed. According to the thermal insulation design code of direct-buried pipeline, the combination of limiting the outer surface temperature of pipeline and optimizing calculation is put forward to determine the thermal insulation thickness of direct-buried pipeline. The influence of relevant factors on the results of the heat preservation thickness calculated by limiting the outer surface temperature method of the pipeline is analyzed. The second part mainly discusses the problem of setting up the relay pumping station. According to the engineering example, through hydraulic calculation and the drawing of hydraulic pressure diagram, the conclusion that the relay pump station should be set up to meet the requirement of hydraulic condition is concluded. The series of relay pumping stations is discussed and the relevant results are obtained. The advantages of setting up relay pumping stations for heating networks with long distance are proved. The conclusion of this paper can provide technical support for the design of long-distance heating network.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU995

【引證文獻(xiàn)】

中國(guó)碩士學(xué)位論文全文數(shù)據(jù)庫(kù) 前2條

1 孫海林;山西某縣城集中供熱規(guī)劃方案優(yōu)化研究[D];西安建筑科技大學(xué);2017年

2 鄭秋爽;熱水供熱系統(tǒng)長(zhǎng)輸管線的可靠性研究[D];哈爾濱工業(yè)大學(xué);2017年

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本文編號(hào)：1836363