供熱管網(wǎng)水力計算模型研究.pdf

1、華北電力大學(xué)（保定）碩士學(xué)位論文供熱管網(wǎng)水力計算模型研究姓名：秦芳芳申請學(xué)位級別：碩士專業(yè)：流體機械及工程指導(dǎo)教師：王松嶺吳正人20081215華北電力大學(xué)碩士學(xué)位論文摘要摘要論文針對供熱管網(wǎng)實際情況，建立了通用的供熱管網(wǎng)水力計算模型并進行編程求解。對節(jié)點方程法進行改進，構(gòu)造了新的迭代方程式，提高了計算收斂性。運用ⅥsualBasic語言結(jié)合Access數(shù)據(jù)庫編制了水力計算軟件，并實現(xiàn)了管網(wǎng)運行工況相關(guān)數(shù)據(jù)的圖形顯示及查詢。通過實例證明

2、了模型的正確性，算法合理、收斂性好，可為熱網(wǎng)的安全運行及設(shè)計改造提供有效依據(jù)。此外，利用編制的軟件對多熱源環(huán)狀管網(wǎng)變工況實例進行了水力計算，得到了管網(wǎng)的管段流量、流速、水頭損失、比摩阻等參數(shù)，并進行了詳細分析。關(guān)鍵詞：供熱管網(wǎng)，水力計算，節(jié)點方程法，圖論，visualBasicABSTRACTInthep印er，auniVe掩aLlhydr肌liccalcula芏ionalmodelforheat呻ply越姍orkwasestablis

3、hed瓶dsolvedwithpf0伊amAnda北witeratiVeequationw夠weUcollStructed也roughimprovingtheexistingnodeequationmetllodwMchenhancedtheastringencyofcalculationThehydrauliccalculationsoRw蜀睇oftheheatsupplyne俺rorkwasprogrammedwithⅥsualB鈾

4、iclanguagecombilledwithAccessdatabase，wbichrcalized仕忙fhnctionofmspla姐nggr印KcalanddataqueryAndthenvaluesofane佩rork詛lculatcd謝m也edeveloped∞Rware、張scomp盯ed塒thmeasuredValuest0pr0Vethecorrectnessofthemodel，、jl，!hjchc鋤pr0Vide躚e

5、?！痗ctivebaSisforthesafeoperation粗dre嬲onabledesignmodificationoftheheatsupplync柵ofkAlso，theresllltsshowthat也ealgofi也mis聆懿onable躚dtheconve瑪enceisperfectInaddition，tllehydrauliccalculationin謝able、柏r玉(ingconditionforamulti—h

6、catsource血gshapedheat—supplynet、)I，orkw齬presentedintllepaper誠ththesoR、v盯eAndthenwegotconclusio粥abouttheoperationconditionoftheheatsupplynet啪rk也roughanalysetheobtainedcorrelatiVepar鋤etersofthatpipenetworksuchasthenowofthe

7、pipesection，veloci劬headIossfrictionresiStanceratioQinFang脅g(FluidMechanicandEngineering)DirectedbyPf0￡W髓gS0ngling鋤dLecturefWuZheng—rcnKEYWoRDS：heatsupplynetwol’k，hydrauliccalculation，nodeequationmethod，graphtheoI’y，Visua