【摘要】：經(jīng)濟(jì)突飛猛進(jìn)的今天,人民對(duì)于生活品質(zhì)的要求逐漸提高,我國(guó)城鎮(zhèn)化腳步也隨之加快。然而,城市熱網(wǎng)規(guī)劃對(duì)于城市發(fā)展的滯后性與不完善性,使得城市供熱輸配系統(tǒng)面臨著擴(kuò)展的需求。本文則主要研究分布式輸配供熱系統(tǒng)的擴(kuò)展設(shè)計(jì),并提出解決分布式輸配供熱系統(tǒng)擴(kuò)展問(wèn)題的多級(jí)分布式輸配供熱系統(tǒng)形式。文章首先針對(duì)變頻水泵,提出反應(yīng)水泵工作能力的允許運(yùn)行最高揚(yáng)程比概念。通過(guò)理論分析,建立數(shù)學(xué)模型,確定其影響因素。根據(jù)水泵樣本,進(jìn)行樣本分析,定量確定平坦型與陡降型兩種水泵類型的工作能力。并且提出變頻水泵的選型方法,保證水泵最大工作能力的利用。通過(guò)建立熱網(wǎng)模型,利用控制變量的方法進(jìn)行系統(tǒng)擴(kuò)展前后水力工況模擬,同時(shí)根據(jù)因素分析定性分析零壓差點(diǎn)與熱負(fù)荷接入點(diǎn)對(duì)分布式輸配供熱系統(tǒng)擴(kuò)展前后水力工況的影響。提出供熱系統(tǒng)最大擴(kuò)展規(guī)模評(píng)價(jià)指標(biāo),針對(duì)不同分布式輸配系統(tǒng)進(jìn)行分析,得出最大擴(kuò)展規(guī)模。提出多級(jí)分布式輸配供熱系統(tǒng)概念,并對(duì)系統(tǒng)形式進(jìn)行簡(jiǎn)要闡述。同時(shí)從理論層面分析系統(tǒng)電耗計(jì)算方法。并通過(guò)模擬的方法對(duì)系統(tǒng)的節(jié)能性、分級(jí)規(guī)模和系統(tǒng)擴(kuò)展改造的可行性進(jìn)行定性定量的分析。并依據(jù)研究結(jié)論提出分布式輸配供熱系統(tǒng)擴(kuò)展設(shè)計(jì)策略。以遼寧某供熱管網(wǎng)工程為例,對(duì)系統(tǒng)熱力站水泵擴(kuò)展前后的揚(yáng)程增幅比進(jìn)行計(jì)算分析,指導(dǎo)系統(tǒng)改造。并計(jì)算系統(tǒng)擴(kuò)展改造前后的電耗,證明改造方法的可行性與實(shí)用性。
[Abstract]:With the rapid development of economy today, people's demands for quality of life are raised gradually, and the pace of urbanization in our country is also accelerated. However, due to the lag and imperfection of urban heat network planning, urban heating transmission and distribution system is facing the need of expansion. This paper mainly studies the extended design of distributed transmission and distribution heating system, and puts forward a multi-level distributed heating system form to solve the problem of distributed transmission and distribution heating system expansion. In this paper, the concept of maximum allowable lift ratio of reactive pump is proposed for variable frequency pump. Through theoretical analysis, the mathematical model is established, and the influencing factors are determined. According to the water pump sample, the working ability of the flat type and the steep fall type is determined quantitatively by sample analysis. The selection method of variable-frequency pump is put forward to ensure the utilization of the maximum working capacity of the pump. By establishing the heat network model and using the method of controlling variables to simulate the hydraulic conditions before and after the system expansion, At the same time, the influence of zero pressure difference point and heat load access point on the hydraulic condition of distributed transmission and distribution heating system before and after expansion is analyzed qualitatively according to factor analysis. The evaluation index of maximum expansion scale of heating system is put forward, and the maximum expansion scale is obtained by analyzing different distributed transmission and distribution systems. This paper puts forward the concept of multi-level distributed heating transmission and distribution system, and briefly expounds the form of the system. At the same time, the calculation method of system power consumption is analyzed theoretically. The energy saving, grading scale and feasibility of system expansion and transformation are analyzed qualitatively and quantitatively by simulation method. Based on the conclusion of the research, the extended design strategy of distributed transmission and distribution heating system is put forward. Taking a heating pipe network project in Liaoning as an example, this paper calculates and analyzes the ratio of lift increase before and after the expansion of water pump in the thermal station of the system, and guides the system transformation. The power consumption before and after the expansion of the system is calculated, and the feasibility and practicability of the modification method are proved.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU995

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