鄂爾多斯市某酒店供熱系統(tǒng)熱負(fù)荷計(jì)算過程案例工程設(shè)計(jì)概況工程概況本工程為鄂爾多斯市某酒店熱水供暖系統(tǒng)設(shè)計(jì)，設(shè)計(jì)中需依據(jù)鄂爾多斯市的氣候特點(diǎn)和酒店類建筑的功能特點(diǎn)選擇合理的采暖方式。該建筑樓層供21層，建筑性質(zhì)為公寓式旅館，地上建筑面積為18673.9m2，建筑高度為68.23m。設(shè)計(jì)參數(shù)1.2.1室外氣象資料參考《民用建筑供暖通風(fēng)與空氣調(diào)節(jié)設(shè)計(jì)規(guī)范》(GB50736-2012)中的內(nèi)蒙古自治區(qū)鄂爾多斯市。城市海拔（m）冬季大氣壓力（kpa）冬季室外平均風(fēng)速（m/s）冬季室外計(jì)算溫度（℃）北京1460.4856.72.9-室內(nèi)設(shè)計(jì)參數(shù)參考《全國民用建筑工程設(shè)計(jì)技術(shù)措施—暖通空調(diào)·動(dòng)力》2009得到以下室內(nèi)設(shè)計(jì)參數(shù)：房間用途客廳臥室衛(wèi)生間廚房設(shè)計(jì)溫度（℃）202025161.2.3圍護(hù)結(jié)構(gòu)傳熱系數(shù)參考《公共建筑節(jié)能設(shè)計(jì)標(biāo)準(zhǔn)》(GB50189-2015)嚴(yán)寒C區(qū)圍護(hù)結(jié)構(gòu)基本要求得到以下圍護(hù)結(jié)構(gòu)傳熱系數(shù)：圍護(hù)結(jié)構(gòu)類型屋面外墻外窗傳熱系數(shù)[W/(m2·K)]/1.7/2.3地面I地面II地面III地面IV0.471.2.4動(dòng)力資料參考畢業(yè)設(shè)計(jì)任務(wù)書，所提供的熱網(wǎng)供回水溫度為75/50℃，靜水壓線為24m。本建筑為一類公共建筑，室內(nèi)熱水供暖系統(tǒng)，根據(jù)該建筑類型和建筑結(jié)構(gòu)，采用地面輻射供暖，設(shè)計(jì)供回水溫度為40/30℃。設(shè)計(jì)內(nèi)容（1）設(shè)計(jì)熱負(fù)荷計(jì)算；（2）供暖系統(tǒng)方案比選及設(shè)備選型計(jì)算；（3）供暖系統(tǒng)水力計(jì)算；（4）繪制各層供暖平面圖、系統(tǒng)圖及大樣圖；（5）供暖熱源的設(shè)計(jì)方案。（6）編制設(shè)計(jì)計(jì)算說明書。供熱系統(tǒng)熱負(fù)荷計(jì)算2.1圍護(hù)結(jié)構(gòu)基本耗熱量的計(jì)算（2-1）式中：2.2圍護(hù)結(jié)構(gòu)附加耗熱量2.2.1朝向修正率β1圍護(hù)結(jié)構(gòu)的朝向不同，太陽對其的輻射量大小也是不盡相同的，該朝向修正率選用時(shí)考慮的當(dāng)?shù)厝照諒?qiáng)度和輻射強(qiáng)度的大小，內(nèi)蒙古鄂爾多斯日照強(qiáng)度和輻射強(qiáng)度的相對較大，朝向修正率均取其范圍內(nèi)的最小值，其值如下表2.1：表2.1朝向修正β1朝向東南西北修正率（％）-5-15-502.2.2風(fēng)力修正率β2在不避風(fēng)的高地、河邊、海岸、曠野上的建筑物以及城鎮(zhèn)、廠區(qū)的超高建筑需要進(jìn)行風(fēng)力附加。2.2.3高度修正率β3建筑（除樓梯間外）的圍護(hù)結(jié)構(gòu)耗熱量高度附加率，地面輻射供暖的房間高度大于4m時(shí)，每高出1m宜附加1％，但總附加率不宜大于8％。本建筑各層層高均未超過4m，故不考慮高度修正率。2.2.4兩面外墻修正率β4部分房間有兩面外墻，需要附加5％的兩面外墻修正率β4。2.3外門、窗縫隙滲入室內(nèi)的冷空氣耗熱量；采用考慮熱壓風(fēng)壓的聯(lián)合作用，且室外高度隨風(fēng)速遞增時(shí)的縫隙法的計(jì)算方法：（1）實(shí)際滲風(fēng)量V： （2-2）式中：（2）理論滲風(fēng)量L0：（2-3）式中：表2-2建筑外窗空氣滲透性能分級及a1值級別1級2級3級4級5級滲風(fēng)量m3/m·h≤0.5≤1.5≤2.5≤4≤6a1≤0.1≤0.3≤0.5≤0.8≤1.2本建筑外窗滲透性能屬于2級，故取a1為0.3。（3）滲風(fēng)壓差的綜合修正系數(shù)m：（2-4）式中：表2-3縫隙滲透量的朝向修正系數(shù)n城市朝向NNEEESSSWWNW鄂爾多斯1.000.5050.150.401.00（4）高度修正系數(shù)Ch：（2-5）式中：有效熱壓差與有效風(fēng)壓差之比C：（2-6）將式子化簡后可得：（2-7)式中：冷風(fēng)滲透耗熱量（2-8)式中：綜合上述所有式子即可求出冷風(fēng)滲透耗熱量。2.4供熱房間熱負(fù)荷計(jì)算實(shí)例以116房間(右圖)為例，進(jìn)行熱負(fù)荷過程計(jì)算：已知臥室及客廳，衛(wèi)生間，室外計(jì)算溫度。臥室熱負(fù)荷北外墻：；西外墻：；圖2-1116房間西外窗：；圖2-1116房間地面I：；地面II：；116房間臥室總熱負(fù)荷。（2）衛(wèi)生間熱負(fù)荷西外墻：；西外窗：；地面I：；116房間衛(wèi)生間總熱負(fù)荷?？蛷d熱負(fù)荷西外墻：；西外窗：；地面I：；地面II：；116房間客廳總熱負(fù)荷。冷風(fēng)滲透熱負(fù)荷臥室冷風(fēng)滲透熱負(fù)荷：有效熱壓差與有效風(fēng)壓差之比：；高度修正系數(shù)；滲風(fēng)壓差的綜合修正系數(shù)；理論滲風(fēng)量實(shí)際滲風(fēng)量冷風(fēng)滲透耗熱量同理，衛(wèi)生間及客廳冷風(fēng)滲透熱負(fù)荷（5）116房間總熱負(fù)荷 其余房間見附錄1。附錄附錄1：熱負(fù)荷計(jì)算表一層熱負(fù)荷房間編號戶型圍護(hù)結(jié)構(gòu)傳熱系數(shù)室內(nèi)計(jì)算溫度室外計(jì)算溫度計(jì)算溫度差基本耗熱量耗熱量修正冷風(fēng)滲透耗熱量Q2房間總耗熱量輻射供熱熱負(fù)荷房間總負(fù)荷朝向兩面外墻附加值修正值修正后的耗熱量房間名稱名稱及方向面積Ktnt'wtn-t'wQQ1Q2Q'm2W/（m2·℃）℃℃℃WWWWWW101戶型一次臥北外墻12.480.420-16.836.818400.051.051932508297463198西外墻6.280.420-16.836.892-0.050.05192西外窗3.081.720-16.836.8193-0.050.051193地面I5.80.4720-16.836.8100001100地面II0.080.2320-16.836.810011主臥南外墻9.790.420-16.836.8144-0.150.050.9130238902812西外墻13.650.420-16.836.8201-0.050.051201南外窗2.31.720-16.836.8144-0.150.050.9129地面I11.40.4720-16.836.8197001197地面II0.840.2320-16.836.870017廚房西外墻2.580.416-16.832.834-0.0500.9532147304274西外窗1.321.716-16.832.874-0.0500.9570地面I3.60.4716-16.832.85500155衛(wèi)生間西外墻6.090.425-16.841.8102-0.0500.9597273515464西外窗1.321.725-16.841.894-0.0500.9589地面I2.880.4725-16.841.85700157客廳南外墻6.930.420-16.836.8102-0.1500.85873531002902南外窗5.941.520-16.836.8328-0.1500.85279地面I90.4720-16.836.8156001156地面II15.060.2320-16.836.8127001127102戶型二客房南外墻5.580.420-16.836.882-0.1500.85703327396651405南外窗3.781.720-16.836.8236-0.1500.85201地面I4.80.4720-16.836.88300183地面II4.80.26320-16.836.84600146地面III1.680.1220-16.836.870017衛(wèi)生間地面III3.120.1225-16.841.8160011602119地面IV1.680.0725-16.841.850015客廳南外墻5.790.420-16.836.885-0.1500.8572298801721南外窗5.131.520-16.836.8283-0.1500.85241地面I5.80.4720-16.836.8100001100地面II7.960.2320-16.836.86700167地面III5.60.1220-16.836.82500125103戶型三南外墻8.070.420-16.836.8119-0.1500.851013751016915915南外窗6.751.520-16.836.8373-0.1500.85317地面I7.20.4720-16.836.8125001125地面II7.20.2320-16.836.86100161地面III7.20.1220-16.836.83200132地面IV2.520.0720-16.836.860016104戶型三南外墻8.070.420-16.836.8119-0.1500.851013751016915915南外窗6.751.520-16.836.8373-0.1500.85317地面I7.20.4720-16.836.8125001125地面II7.20.2320-16.836.86100161地面III7.20.1220-16.836.83200132地面IV2.520.0720-16.836.860016105戶型二客房南外墻5.580.420-16.836.882-0.1500.85703327396651405南外窗3.781.720-16.836.8236-0.1500.85201地面I4.80.4720-16.836.88300183地面II4.80.26320-16.836.84600146地面III1.680.1220-16.836.870017衛(wèi)生間地面III3.120.1225-16.841.8160011602119地面IV1.680.0725-16.841.850015客廳南外墻5.790.420-16.836.885-0.1500.8572298801721南外窗5.131.520-16.836.8283-0.1500.85241地面I5.80.4720-16.836.8100001100地面II7.960.2320-16.836.86700167地面III5.60.1220-16.836.82500125106戶型一次臥北外墻12.480.420-16.836.818400.051.051932598387543201東外墻6.280.420-16.836.892-0.050.05192東外窗3.081.720-16.836.8193-0.050.051193地面I5.80.4720-16.836.8100001100地面II0.080.2320-16.836.810011主臥南外墻9.790.420-16.836.8144-0.150.050.9130238902812東外墻13.650.420-16.836.8201-0.050.051201南外窗2.31.720-16.836.8144-0.150.050.9129地面I11.40.4720-16.836.8197001197地面II0.840.2320-16.836.870017廚房東外墻2.580.416-16.832.834-0.0500.9532144302272東外窗1.321.716-16.832.874-0.0500.9570地面I3.60.4716-16.832.85500155衛(wèi)生間東外墻6.090.425-16.841.8102-0.0500.9597270512461東外窗1.321.725-16.841.894-0.0500.9589地面I2.880.4725-16.841.85700157客廳南外墻6.930.420-16.836.8102-0.1500.85873531002902南外窗5.941.520-16.836.8328-0.1500.85279地面I90.4720-16.836.8156001156地面II15.060.2320-16.836.8127001127107戶型四客房北外墻15.990.420-16.836.823500.051.0524728811079962475東外墻7.740.420-16.836.8114-0.050.051114東外窗3.961.720-16.836.8248-0.050.051248地面I11.150.4720-16.836.8193001193地面II2.040.2320-16.836.81700117衛(wèi)生間東外墻6.480.425-16.841.8108-0.0500.95103270572515東外窗1.322.325-16.841.8127-0.0500.95121地面I40.4725-16.841.87900179客廳東外墻7.20.420-16.836.8106-0.0500.951013461072964東外窗5.671.720-16.836.8355-0.0500.95337地面I12.090.4720-16.836.8209001209地面II9.360.2320-16.836.87900179108戶型三北外墻8.070.420-16.836.81190011193361013911911北外窗5.281.720-16.836.8330001330地面I7.20.4720-16.836.8125001125地面II7.470.2320-16.836.86300163地面III8.40.1220-16.836.83700137地面IV1.050.0720-16.836.830013109戶型三北外墻8.070.420-16.836.81190011193361009908908北外窗5.281.720-16.836.8330001330地面I7.20.4720-16.836.8125001125地面II7.20.2320-16.836.86100161地面III7.20.1220-16.836.83200132地面IV2.520.0720-16.836.860016110戶型三北外墻8.070.420-16.836.81190011193361009908908北外窗5.281.720-16.836.8330001330地面I7.20.4720-16.836.8125001125地面II7.20.2320-16.836.86100161地面III7.20.1220-16.836.83200132地面IV2.520.0720-16.836.860016111戶型三北外墻8.070.420-16.836.81190011193361009908908北外窗5.281.720-16.836.8330001330地面I7.20.4720-16.836.8125001125地面II7.20.2320-16.836.86100161地面III7.20.1220-16.836.83200132地面IV2.520.0720-16.836.860016112戶型三北外墻8.070.420-16.836.81190011193361009908908北外窗5.281.720-16.836.8330001330地面I7.20.4720-16.836.8125001125地面II7.20.2320-16.836.86100161地面III7.20.1220-16.836.83200132地面IV2.520.0720-16.836.860016113戶型三北外墻8.070.420-16.836.81190011193361009908908北外窗5.281.720-16.836.8330001330地面I7.20.4720-16.836.8125001125地面II7.20.2320-16.836.86100161地面III7.20.1220-16.836.83200132地面IV2.520.0720-16.836.860016114戶型三北外墻8.070.420-16.836.81190011193361009908908北外窗5.281.720-16.836.8330001330地面I7.20.4720-16.836.8125001125地面II7.20.2320-16.836.86100161地面III7.20.1220-16.836.83200132地面IV2.520.0720-16.836.860016115戶型三北外墻8.070.420-16.836.81190011193361015914914北外窗5.281.720-16.836.8330001330地面I7.30.4720-16.836.8126001126地面II8.40.2320-16.836.87100171地面III7.40.1220-16.836.83300133地面IV10.0720-16.836.830013116戶型四客房北外墻15.990.420-16.836.823500.051.05247336115510392473西外墻7.740.420-16.836.8114-0.050.051114西外窗3.961.720-16.836.8248-0.050.051248地面I11.150.4720-16.836.8193001193地面II2.040.2320-16.836.81700117衛(wèi)生間西外墻6.480.425-16.841.8108-0.0500.95103292594535西外窗1.322.325-16.841.8127-0.0500.95121地面I40.4725-16.841.87900179客廳西外墻7.20.420-16.836.8106-0.0500.95101273999899西外窗5.671.720-16.836.8355-0.0500.95337地面I12.090.4720-16.836.8209001209地面II9.360.2320-16.836.87900179117戶型五客房西外墻8.620.420-16.836.8127-0.050.05112735110559501675南外墻12.480.420-16.836.8184-0.150.050.9165西外窗3.081.720-16.836.8193-0.050.051193地面I12.60.4720-16.836.8218001218地面II0.2250.2320-16.836.820012客廳西外墻7.380.420-16.836.8109-0.0500.95103263806725西外窗3.081.720-16.836.8193-0.0500.95183地面I7.60.4720-16.836.8131001131地面II13.40.2320-16.836.8113001113地面III2.70.1220-16.836.81200112一層冷風(fēng)滲透熱負(fù)荷房間號房間名稱門窗周長tntwhzh△CfV0CChCrnma1ρwL0V冷風(fēng)滲透耗熱量101次臥7.2020.00-16.803.123.330.520.400.73.460.31.381.0717.62250主臥6.620.00-16.8020.400.23.660.31.381.0716.77238廚房5.615.00-16.803.118.980.520.400.72.830.31.381.0711.98147衛(wèi)生間5.625.00-16.8020.400.74.740.31.381.0716.93273客廳9.820.00-16.8020.400.23.660.31.381.0724.91353102客房9.220.00-16.8020.400.23.660.31.381.0723.38332客廳8.220.00-16.8020.400.23.660.31.381.0720.84296103客房10.420.00-16.8020.400.23.660.31.381.0726.43375104客房10.420.00-16.8020.400.23.660.31.381.0726.43375105客房9.220.00-16.8020.400.23.660.31.381.0723.38332客廳8.220.00-16.8020.400.23.660.31.381.0720.84296106次臥7.220.00-16.8020.400.13.650.31.381.0718.27259主臥6.620.00-16.8020.400.23.660.31.381.0716.77238廚房5.615.00-16.803.118.980.520.400.12.750.31.381.0711.76144衛(wèi)生間5.625.00-16.8020.400.14.660.31.381.0716.73270客廳9.820.00-16.8020.400.23.660.31.381.0724.91353107客房820.00-16.8020.400.13.650.31.381.0720.30288衛(wèi)生間5.625.00-16.8020.400.14.660.31.381.0716.73270客廳9.620.00-16.8020.400.13.650.31.381.0724.36346108客房9.220.00-16.8020.400.73.730.31.381.0723.69336109客房9.220.00-16.8020.400.73.730.31.381.0723.69336110客房9.220.00-16.8020.400.73.730.31.381.0723.69336111客房9.220.00-16.8020.400.73.730.31.381.0723.69336112客房9.220.00-16.8020.400.73.730.31.381.0723.69336113客房9.220.00-16.8020.400.73.730.31.381.0723.69336114客房9.220.00-16.8020.400.73.730.31.381.0723.69336115客房9.220.00-16.8020.400.73.730.31.381.0723.69336116客房820.00-16.8020.400.73.730.31.381.0720.60292衛(wèi)生間5.625.00-16.8020.400.74.740.31.381.0716.93273客廳9.620.00-16.8020.400.73.730.31.381.0724.72351117客房7.220.00-16.8020.400.73.730.31.381.0718.54263客廳8.620.00-16.8020.400.73.730.31.381.0722.14314二層熱負(fù)荷三層熱負(fù)荷房間編號戶型圍護(hù)結(jié)構(gòu)冷風(fēng)滲透耗熱量Q2房間總耗熱量輻射供熱熱負(fù)荷房間總熱負(fù)荷房間編號戶型圍護(hù)結(jié)構(gòu)冷風(fēng)滲透耗熱量Q2房間總耗熱量輻射供熱熱負(fù)荷房間總熱負(fù)荷房間名稱Q2Q'房間名稱Q2Q'WWWWWWWW201戶型一次臥1875595031908301戶型一次臥1745464921976主臥208603543主臥192587529廚房108179161廚房101172155衛(wèi)生間165315284衛(wèi)生間154304274客廳327611550客廳303586528202戶型二客房277487438853302戶型二客房256466419895客廳308551496客廳285528475203戶型三302647582540303戶型三279624562562204戶型三302647582540304戶型三279624562562205戶型三302647582540305戶型三279624562562206戶型三302647582540306戶型三279624562562207戶型二客房290500450824307戶型二客房268478430863客廳258501451客廳239481433208戶型一次臥1825544981892308戶型一次臥1685404861962主臥208603543主臥192587529廚房104176158廚房97168151衛(wèi)生間161311280衛(wèi)生間149299269客廳327611550客廳303586528209戶型五客房187565508916309戶型五客房174552497943客廳232512461客廳217496447210戶型四客房2076806121402310戶型四客房1916655981447衛(wèi)生間161353318衛(wèi)生間149341307客廳257623560客廳238603543211戶型三252576519487311戶型三235559503503212戶型三252576519487312戶型三235559503503213戶型三252576519487313戶型三235559503503214戶型三252576519487314戶型三235559503503215戶型三252576519487315戶型三235559503503216戶型三252576519487316戶型三235559503503217戶型三252576519487317戶型三235559503503218戶型三252576519487318戶型三235559503503219戶型四客房2136866181470319戶型四客房1986726051516衛(wèi)生間180349314衛(wèi)生間167337303客廳327698628客廳305676608220戶型五客房231609548993320戶型五客房2165935341026客廳287567510客廳268547493四層熱負(fù)荷五層熱負(fù)荷房間編號戶型圍護(hù)結(jié)構(gòu)冷風(fēng)滲透耗熱量Q2房間總耗熱量輻射供熱熱負(fù)荷房間總熱負(fù)荷房間編號戶型圍護(hù)結(jié)構(gòu)冷風(fēng)滲透耗熱量Q2房間總耗熱量輻射供熱熱負(fù)荷房間總熱負(fù)荷房間名稱Q2Q'房間名稱Q2Q'WWWWWWWW401戶型一次臥1615334801908501戶型一次臥1475194671837主臥176571514主臥158554498廚房93164148廚房85156141衛(wèi)生間142292263衛(wèi)生間129279252客廳277560504客廳250533480402戶型二客房234444400853502戶型二客房211421379809客廳261504453客廳235478430403戶型三255600540540503戶型三230575518518404戶型三255600540540504戶型三230575518518405戶型三255600540540505戶型三230575518518406戶型三255600540540506戶型三230575518518407戶型二客房245455409824507戶型二客房221431388783客廳218461415客廳197440396408戶型一次臥1545254731892508戶型一次臥1385104591818主臥176571514主臥158554498廚房88159143廚房79151135衛(wèi)生間136286258衛(wèi)生間122273245客廳277560504客廳250533480409戶型五客房161538485916509戶型五客房147524472888客廳200480432客廳182462416410戶型四客房1756485831402510戶型四客房1576315681355衛(wèi)生間136328295衛(wèi)生間122314283客廳217583524客廳196561505411戶型三217541487487511戶型三198522470470412戶型三217541487487512戶型三198522470470413戶型三217541487487513戶型三198522470470414戶型三217541487487514戶型三198522470470415戶型三217541487487515戶型三198522470470416戶型三217541487487516戶型三198522470470417戶型三217541487487517戶型三198522470470418戶型三21754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