某酒店建筑排水系統(tǒng)中的建筑熱水系統(tǒng)設(shè)計(jì)計(jì)算過(guò)程案例目錄TOC\o"1-3"\h\u7889某酒店建筑排水系統(tǒng)中的建筑熱水系統(tǒng)設(shè)計(jì)計(jì)算過(guò)程案例 1150991.1熱水系統(tǒng)分區(qū) 1157241.2熱水供應(yīng)系統(tǒng)的參數(shù)和計(jì)算 1176551.2.1熱水量的計(jì)算 117141.2.2耗熱量計(jì)算 2270401.2.3熱媒耗量計(jì)算 2299251.3加熱設(shè)備的選擇和計(jì)算 3290811.4熱水管道的布置 3122581.5熱水管網(wǎng)的水力計(jì)算 3266281.1.1.設(shè)計(jì)秒流量計(jì)算、管徑計(jì)算以及水頭損失計(jì)算 4302311.1.2熱給水管網(wǎng)水力計(jì)算 4148851.1.3熱給水管網(wǎng)熱損失以及循環(huán)流量 6118001.1.4循環(huán)流量分配 7125661.1.5循環(huán)水頭計(jì)算 8281711.6循環(huán)水泵選擇 11322741.7電熱水器計(jì)算 111.1熱水系統(tǒng)分區(qū)本設(shè)計(jì)分為一區(qū)、二區(qū)、三區(qū)、四區(qū)。其中一區(qū)大部分為公共衛(wèi)生間，熱水需求量比較少，因此一區(qū)選擇局部熱水供應(yīng)系統(tǒng)，采用電熱水器加熱，除一區(qū)外，第二十一層的套房用水點(diǎn)也很分散，衛(wèi)生間1號(hào)和衛(wèi)生間2號(hào)用水需求也不高，因此這些也采用電熱水器加熱。因此本設(shè)計(jì)的熱水系統(tǒng)的設(shè)計(jì)范圍是三層至二十層（除了衛(wèi)生間2號(hào)之外）的酒店客房衛(wèi)生間，對(duì)于淋浴水量多，且用水分布均勻，因此采用集中熱水供應(yīng)系統(tǒng)。采用立管全循環(huán)供水方式。因此，本設(shè)計(jì)熱水系統(tǒng)分為3個(gè)供水區(qū)，低區(qū)為三層至八層，中區(qū)為九層至十四層，高區(qū)為十五層至二十層，三個(gè)分區(qū)均采用上行下給同程式的供水方式。1.2熱水供應(yīng)系統(tǒng)的參數(shù)和計(jì)算采用容積式換熱器。熱媒為蒸汽，P=0.30MPa；熱水使用溫度：淋浴器和浴盆為40℃，洗臉盆為30℃。設(shè)計(jì)熱水水溫為60℃，本設(shè)計(jì)處于南昌，屬于江西，按規(guī)范選擇冷水水溫為5℃，使用時(shí)間為24h。1.2.1熱水量的計(jì)算QQ表1.1旅館熱水用水定額以及小時(shí)變化系數(shù)建筑物名稱單位熱水用水定額使用時(shí)數(shù)賓館客房（最高日L）（h）旅客每床每日15024員工每人每日5024按照?qǐng)D紙給出的床位數(shù)計(jì)算，一層二層與夾層沒(méi)有床位，三層有35張床位，四至二十層有36張床位，二十一層有兩張床位，設(shè)計(jì)范圍內(nèi)總共647個(gè)床位，職工按照每層2人計(jì)算。旅客熱水用水定額取150L，員工取50L。根據(jù)用水單位數(shù)，取旅館熱水小時(shí)變化數(shù)取4.60。表1.2低區(qū)熱水量計(jì)算表名稱用水單位數(shù)用水定額QdKbQh用水時(shí)間tL/（單位·d）L/dL/hh旅客215150322504.66181.2524員工12506004.611524合計(jì)328506296.25表1.3中、高區(qū)熱水量計(jì)算表名稱用水單位數(shù)用水定額QdKbQh用水時(shí)間tL/（單位·d）L/dL/hh旅客216150324004.6621024員工12506004.611524合計(jì)3300063251.2.2耗熱量計(jì)算Q熱水溫度為60℃，此時(shí)熱水密度為0.983，表1.4低區(qū)中區(qū)高區(qū)Qh6296.2563256325設(shè)計(jì)小時(shí)耗熱量1449932145655314565531.2.3熱媒耗量計(jì)算低區(qū)：G=1.15×Q中區(qū)：G=1.15×Q高區(qū)：G=1.15×Q蒸汽總耗量為1840.61kg/h1.3加熱設(shè)備的選擇和計(jì)算本設(shè)計(jì)選擇容積式水加熱器。其中低區(qū)加熱設(shè)備計(jì)算為：表1.5導(dǎo)流裝置容積式水加熱器tmc℃132.9tmz℃132.9tc℃5tz℃60溫差tj℃100.4熱損失系數(shù)Cr1.2傳熱系數(shù)損失系數(shù)0.7傳熱系數(shù)3000設(shè)計(jì)小時(shí)耗熱量KJ/h1449931.93水加熱器的加熱面積Fjrm28.25最小儲(chǔ)水容積L3148.125中區(qū)、高區(qū)加熱設(shè)備計(jì)算為：表1.6導(dǎo)流裝置容積式水加熱器tmc℃132.90tmz℃132.90tc℃1.00tz℃60.00溫差tj℃100.40熱損失系數(shù)Cr1.20傳熱系數(shù)損失系數(shù)0.70傳熱系數(shù)3000.00設(shè)計(jì)小時(shí)耗熱量KJ/h1456552.63水加熱器的加熱面積Fjrm28.29最小儲(chǔ)水容積L3162.50選擇RV-04-3.5(1.6/1.0)三臺(tái)，其貯水容量為3.5m3，實(shí)際換熱面積為8.8m2。1.4熱水管道的布置熱水管道布置，利用管道井、吊頂或設(shè)備層暗裝，低區(qū)、中區(qū)、高區(qū)熱水供水橫干管在八、十四層、二十層吊頂內(nèi)敷設(shè)；供水干管和供水立管采用保溫處理，熱水橫管坡度設(shè)為0.003，管材選擇塑料給水管。1.5熱水管網(wǎng)的水力計(jì)算加熱器出水溫度60℃，系統(tǒng)只提供淋浴和盥洗用水，因此最不利點(diǎn)設(shè)計(jì)水溫為40℃。1.1.1.設(shè)計(jì)秒流量計(jì)算、管徑計(jì)算以及水頭損失計(jì)算熱水水力計(jì)算中，公式與給水相同：q式中：α——本設(shè)計(jì)取2.5；管內(nèi)流速最大不超過(guò)2m/s。表1.7熱水管道的水流速度公稱直徑（mm）15~2025~40≥50水流速度（m/s）≤0.8≤1.0≤1.2熱水管徑一般不宜小于20mm，根據(jù)流量公式，即可求得管徑：d=沿程水頭損失：hi=105設(shè)計(jì)時(shí)，調(diào)整管道直徑，控制管內(nèi)流速在規(guī)定范圍內(nèi)本設(shè)計(jì)中給水管材采用塑料類管，海曾威廉系數(shù)取140。局部水頭損失：h則總水頭損失h=h1.1.2熱給水管網(wǎng)水力計(jì)算表1.8低區(qū)水力計(jì)算表計(jì)算管段編號(hào)衛(wèi)生器具當(dāng)量計(jì)算當(dāng)量總數(shù)Ngqg（L/s）標(biāo)準(zhǔn)管徑設(shè)計(jì)流速沿?fù)p坡度i(Kpa/m)管長(zhǎng)L（m）沿?fù)p(kpa)洗臉盆浴盆淋浴器0.10.20.10.510.51~211.000.2020.000.640.301.400.422~3111.500.3021.000.610.223.000.653~41112.000.4032.000.500.110.100.014~52112.500.5032.000.620.171.300.225~6126611.001.9460.000.680.1011.101.076~72461827.002.6070.000.680.081.320.107~83663039.003.1270.000.810.111.120.568~948123654.003.6770.000.950.150.340.059~1060124866.004.0670.001.060.188.001.4310~1172126078.004.4270.001.150.218.001.6711~1284127290.004.7480.000.940.121.890.2312001.0580.001.000.141.120.7113~141061294112.001.2980.001.050.153.880.5914~1511818100127.001.6380.001.120.171.890.3215~1613018112139.001.8980.001.170.198.001.4816~1714218124151.006.1490.000.970.113.850.43立006.1490.000.970.1133.553.7813.74圖1.1熱給水系統(tǒng)計(jì)算草圖表1.9中區(qū)水力計(jì)算表計(jì)算管段編號(hào)衛(wèi)生器具當(dāng)量計(jì)算當(dāng)量總數(shù)Ng最終qg（L/s）標(biāo)準(zhǔn)管徑設(shè)計(jì)流速沿?fù)p坡度i(Kpa/m)管長(zhǎng)L（m）沿?fù)p(kpa)洗臉盆浴盆淋浴器0.10.20.10.510.51~2110.2020.000.640.301.400.422~3111.50.3021.000.610.223.000.653~411120.4032.000.500.110.100.014~52112.50.5032.000.620.171.300.225~61266151.9460.000.680.1011.101.076~724618272.6070.000.680.081.320.107~836630393.1270.000.810.111.120.568~9481236543.6770.000.950.150.340.059~10601248664.0670.001.060.188.001.4310~11721260784.4270.001.150.218.001.6711~12841272904.7480.000.940.121.890.2312~139612841021.0580.001.000.141.120.7113~1410612941121.2980.001.050.153.880.5914~15118181001271.6380.001.120.171.890.3215~16130181121391.8980.001.170.198.001.4816~17142181241516.1490.000.970.113.850.43立管142181241516.1490.000.970.1154.556.1516.10表1.10高區(qū)水力計(jì)算表計(jì)算管段編號(hào)衛(wèi)生器具當(dāng)量計(jì)算當(dāng)量總數(shù)Ng最終qg（L/s）標(biāo)準(zhǔn)管徑設(shè)計(jì)流速沿?fù)p坡度i(Kpa/m)管長(zhǎng)L（m）沿?fù)p(kpa)洗臉盆浴盆淋浴器0.10.20.10.510.51~2110.2020.000.640.301.400.422~3111.50.3021.000.610.223.000.653~411120.4032.000.500.110.100.014~52112.50.5032.000.620.171.300.225~61266151.9460.000.680.1011.101.076~724618272.6070.000.680.081.320.107~836630393.1270.000.810.111.120.568~9481236543.6770.000.950.150.340.059~10601248664.0670.001.060.188.001.4310~11721260784.4270.001.150.218.001.6711~12841272904.7480.000.940.121.890.2312~139612841021.0580.001.000.141.120.7113~1410612941121.2980.001.050.153.880.5914~15118181001271.6380.001.120.171.890.3215~16130181121391.8980.001.170.198.001.4816~17142181241516.1490.000.970.113.850.43立管142181241516.1490.000.970.1171.558.5218.471.1.3熱給水管網(wǎng)熱損失以及循環(huán)流量QqQs△ts表1.11低區(qū)中區(qū)高區(qū)設(shè)計(jì)小時(shí)耗熱量1449931.931456552.631456552.63熱損失57997.2858262.1158262.11熱水溫度差10.0010.0010.00熱水密度0.980.980.98循環(huán)流量L/h1409.131411.561411.56循環(huán)流量L/s0.390.390.39每個(gè)熱給水分區(qū)設(shè)置了十二根立管，布置對(duì)稱且管路相似，且熱損失較小，循環(huán)流量的誤差較小，因此假設(shè)每根立管的熱損失相同：每根立管熱損失：低區(qū)為4833.11kJ/h；中區(qū)和高區(qū)為4851.18kJ/h循環(huán)流量：低區(qū)為0.0326L/s，中區(qū)和高區(qū)為0.328L/s。1.1.4循環(huán)流量分配圖1.2回水管道計(jì)算草圖表1.12低區(qū)循環(huán)流量分配管段編號(hào)循環(huán)流量管段編號(hào)循環(huán)流量L/sL/sRHL-7~10.0326RHL-4~90.0326RHL-8~20.03269~100.22831~30.0326RHL-5~110.03262~30.032611~100.0326RHL-6~40.032610~120.26103~40.0652RHL-12~120.03264~60.097912~140.2936RHL-1~50.0326RHL-11~130.03265~60.032613~140.03266~70.130514~150.3262RHL-2~70.0326RHL-10~150.03267~80.163115~160.3588RHL-3~80.0326RHL-9~160.03268~90.195716~170.3914立管0.3914表1.13中區(qū)、高區(qū)循環(huán)流量分配管段編號(hào)循環(huán)流量管段編號(hào)循環(huán)流量L/sL/sRHL-7~10.0328RHL-4~90.0328RHL-8~20.03289~100.22941~30.0328RHL-5~110.03282~30.032811~100.0328RHL-6~40.032810~120.26213~40.0655RHL-12~120.03284~60.098312~140.2949RHL-1~50.0328RHL-11~130.03285~60.032813~140.03286~70.131114~150.3277RHL-2~70.0328RHL-10~150.03287~80.163815~160.3604RHL-3~80.0328RHL-9~160.03288~90.196616~170.3932立管0.39321.1.5循環(huán)水頭計(jì)算回水管管徑應(yīng)比配水管徑小1~2級(jí)。循環(huán)管網(wǎng)的總水頭損失計(jì)算如下：H=表1.14低區(qū)循環(huán)水頭計(jì)算管路管段編號(hào)管長(zhǎng)L（m）管徑（mm）循環(huán)流量qx（L/s）沿程水頭損失v（m/s）水頭損失之和mmH2O/mmmH2O配水管路5*~6*11.1060.000.0330.0090.1030.0112.766*~7*1.3270.000.0650.0160.0210.027*~8*1.1270.000.0980.0330.1710.038*~9*0.3470.000.1300.0570.0190.039*~10*8.0070.000.1630.0860.6870.0410*~11*8.0070.000.1960.1200.9630.0511*~12*1.8980.000.2280.0840.1580.0512*~13*1.1280.000.2610.1070.5480.0513*~14*3.8880.000.2940.1330.5160.0614*~15*1.8980.000.3260.1620.3050.0615*~16*8.0080.000.3590.1931.5450.0716*~17*3.8590.000.3910.1280.4920.06立管33.5590.000.3910.1284.2880.06回水管路1~721.0040.000.0330.0671.3970.03102.447~82.3640.000.0330.0670.1570.038~91.9040.000.0330.0670.3920.039~101.3240.000.0650.2400.3180.0510~111.1240.000.0980.5092.6040.0811~120.3440.000.1300.8670.2930.1012~138.0040.000.1631.31110.4870.1313~148.0040.000.1961.83714.6990.1614~151.8940.000.2282.4454.6130.1815~161.1250.000.2611.0561.4020.1316~173.8850.000.2941.3131.0920.1517~181.8950.000.3261.5963.0120.1718~198.0050.000.3591.90511.2360.1819~203.8560.000.3910.9213.5420.14立管12.5560.000.3910.92111.5560.14表1.15中區(qū)循環(huán)水頭計(jì)算管路管段編號(hào)管長(zhǎng)L（m）管徑（mm）循環(huán)流量qx（L/s）沿程水頭損失v（m/s）水頭損失之和mmH2O/mmmH2O配水管路5*~6*11.1060.000.0330.0090.1030.0116.256*~7*1.3270.000.0650.0160.0210.027*~8*1.1270.000.0980.0330.1710.038*~9*0.3470.000.1300.0570.0190.039*~10*8.0070.000.1630.0860.6870.0410*~11*8.0070.000.1960.1200.9630.0511*~12*1.8980.000.2280.0840.1580.0512*~13*1.1280.000.2610.1070.5480.0513*~14*3.8880.000.2940.1330.5160.0614*~15*1.8980.000.3260.1620.3050.0615*~16*8.0080.000.3590.1931.5450.0716*~17*3.8590.000.3910.1280.4920.06立管54.5590.000.3910.1286.9720.06回水管路1~721.0040.000.0330.0671.3970.03127.587~82.3640.000.0330.0670.1570.038~91.9040.000.0330.0670.3920.039~101.3240.000.0650.2400.3180.0510~111.1240.000.0980.5092.6040.0811~120.3440.000.1300.8670.2930.1012~138.0040.000.1631.31110.4870.1313~148.0040.000.1961.83714.6990.1614~151.8940.000.2282.4454.6130.1815~161.1250.000.2611.0561.4020.1316~173.8850.000.2941.3131.0920.1517~181.8950.000.3261.5963.0120.1718~198.0050.000.3591.90511.2360.1819~203.8560.000.3910.9213.5420.14立管33.5560.000.3910.92130.8920.14圖1.3循環(huán)水頭計(jì)算草圖表1.16高區(qū)循環(huán)水頭計(jì)算管路管段編號(hào)管長(zhǎng)L（m）管徑（mm）循環(huán)流量qx（L/s）沿程水頭損失v（m/s）水頭損失之和mmH2O/mmmH2O配水管路5*~6*11.1060.000.0330.0090.1030.0119.746*~7*1.3270.000.0650.0160.0210.027*~8*1.1270.000.0980.0330.1710.038*~9*0.3470.000.1300.0570.0190.039*~10*8.0070.000.1630.0860.6870.0410*~11*8.0070.000.1960.1200.9630.0511*~12*1.8980.000.2280.0840.1580.0512*~13*1.1280.000.2610.1070.5480.0513*~14*3.8880.000.2940.1330.5160.0614*~15*1.8980.000.3260.1620.3050.0615*~16*8.0080.000.3590.1931.5450.0716*~17*3.8590.000.3910.1280.4920.06立管71.5590.000.3910.1289.6570.06回水管路1~721.0040.000.0330.0671.3970.03152.727~82.3640.000.0330.0670.1570.038~91.9040.000.0330.0670.3920.039~101.3240.000.0650.2400.3180.0510~111.1240.000.0980.5092.6040.0811~120.3440.000.1300.8670.2930.1012~138.0040.000.1631.31110.4870.1313~148.0040.000.1961.83714.6990.1614~151.8940.000.2282.4454.6130.1815~161.1250.000.2611.0561.4020.1316~173.8850.000.2941.3131.0920.1517~181.8950.000.3261.5963.0120.1718~198.0050.0