供熱設(shè)計(jì)說明書

#/29t二18°C,At=95+70-18=64.5°C,K=2.503At0.293=8.49W/m2?°C；n2對(duì)于走廊：t二16°C,At=95+70-16=66.5°C,K=8.56W/m2?°C；n2對(duì)于餐廳：t二20°C,At=95+70-20=62.5°C,K=8.41W/m2?°C。n2對(duì)于樓梯間：t二14°C,At=95+70-14=68.5°C,K=8.64W/m2?°C。n24.2散熱器的布置與安裝散熱器布置布置散熱器應(yīng)符合下列規(guī)定：1、散熱器宜安裝在外墻窗臺(tái)下,沿散熱器上升的對(duì)流熱氣流能阻止和改善從玻璃窗下降的冷氣流和玻璃冷輻射的影響,使流經(jīng)室內(nèi)的空氣比較暖和舒適；2、為防止散熱器凍裂,兩道外門之間,不應(yīng)設(shè)置散熱器。有凍結(jié)危險(xiǎn)的樓梯間或其它有凍結(jié)危險(xiǎn)的場(chǎng)所,應(yīng)由單獨(dú)的立、支管供暖,且不得裝設(shè)調(diào)節(jié)閥；3、散熱器一般明裝,布置簡(jiǎn)單,內(nèi)部裝修要求較高的可暗裝；4、在垂直單管或雙管熱水供暖系統(tǒng)中,同一房間的兩組散熱器可以串聯(lián)連接；貯藏室、廁所和廚房等輔助用室及走廊的散熱器,可同鄰室串聯(lián)連接；5、在樓梯間布置散熱器時(shí),考慮樓梯間熱流上升的特點(diǎn),應(yīng)盡量布置在底層；6、鑄鐵散熱器的組裝片數(shù),不宜超過下列數(shù)值：粗柱型（包括柱翼型）—20片；細(xì)柱型（四柱）—25片；長(zhǎng)翼型—7片。散熱器組對(duì)后,以及整組出廠的散熱器在安裝之前應(yīng)做水壓試驗(yàn)。散熱器安裝底部距地面不小于60mm,通常取150mm；頂部距窗臺(tái)板不小于50mm；背部與墻面凈距不小于25mm。本設(shè)計(jì)采用明裝，安裝在墻面，上加蓋板，A=100mm，即B=1.023同側(cè)連接，上進(jìn)下出，即02-1.0，管道也明裝于供暖房間內(nèi)，所以管道散熱量抵消了水冷卻的影響。

4.3散熱器的計(jì)算4.3.1散熱器面積計(jì)算散熱器散熱面積F按參考文獻(xiàn)⑵公式2-2計(jì)算:QK(t—t)pjn卩卩卩4-1)123式中F——散熱器的散熱面積（m2）；Q散熱器的散熱量（W）；K——散熱器的傳熱系數(shù)［W/m2?°C］；t——散熱器內(nèi)熱媒平均溫度（C）；pjt――供暖室內(nèi)計(jì)算溫度（C）；n0――散熱器組裝片數(shù)修正系數(shù)，查參考文獻(xiàn)［2］附錄表2-3。計(jì)算散熱器散1熱面積時(shí)，由于每組片數(shù)或總長(zhǎng)度未定，可先假定0=1.0進(jìn)行計(jì)算，計(jì)算出F和n的初始值，然后根據(jù)每組的片數(shù)或長(zhǎng)度乘以修正系數(shù)01，最后確定散熱面積。0――散熱器連接方式修正系數(shù)，查參考文獻(xiàn)⑵附錄2-4，0=1.0；220散熱器安裝形式修正系數(shù)，查參考文獻(xiàn)［2］附錄2-5，0=1.02。以三樓西邊典型辦公室為例:Q1257F二Q000二——-1.02二2.34肝

K（t—t）12尸38.49-64.5pjn4.3.2散熱器片數(shù)確定四柱760型散熱器每片散熱面積為0.235m2,計(jì)算片數(shù)n為：n=Ff（4-2）同樣以西邊典型辦公室為例：2.34n==9.96q10片0.235查參考文獻(xiàn)［2附錄2-3的0為1.0，所以西邊辦公室散熱器片數(shù)為10片。1

4.3.3散熱器計(jì)算匯總計(jì)算方法同上，計(jì)算結(jié)果如下表：當(dāng)散熱器片數(shù)為6-10時(shí)，0為1.0,片數(shù)為11-20時(shí)，0為1.05時(shí)。11先假設(shè)0為1.0，當(dāng)計(jì)算片數(shù)大于10時(shí)，在按0為1.05重新計(jì)算，0=1.0，0=1.02，1123散熱器每片散熱面積為0.235m2。表4.2散熱器計(jì)算結(jié)果樓層房間負(fù)荷(W)房間數(shù)tn溫差(°C)傳熱系數(shù)傳熱面積片數(shù)組數(shù)一層餐廳39885.712062.58.4181.2734618x19衛(wèi)生間115711864.58.492.1591二層餐廳3942312062.58.4180.334218x19衛(wèi)生間115711864.58.492.1591三、四層西辦公室1257121864.58.492.34101南辦公室129841864.58.492.41101北辦公室1327.111864.58.492.59111西北辦公185611864.58.493.63161西南辦公210711864.58.494.12181大辦公室303511864.58.495.93262x13會(huì)議室2834.511864.58.495.54142x12資料室225011864.58.494.4191走廊412011666.58.567.75333x11衛(wèi)生間115621864.58.492.1591五層西辦公室1495121864.58.492.93131南辦公室164341864.58.493.21141北辦公室140211864.58.492.74121西北辦公211111864.58.494.13181西南辦公266911864.58.495.22201大辦公室361511864.58.497.1302x15

會(huì)議室3261.211864.58.496.38282x14資料室234311864.58.494.6201走廊479611666.58.569.02393x13衛(wèi)生間127421864.58.492.32101各樓梯間1890101468.58.643.42151各層散熱器布置情況詳見圖紙。第五章供暖系統(tǒng)水力計(jì)算5.1水力計(jì)算方法上述已說明本設(shè)計(jì)系統(tǒng)分為3區(qū)，一二區(qū)為水平雙管式系統(tǒng)，三區(qū)為上供下回雙管式系統(tǒng)，所以水力計(jì)算也要進(jìn)行分區(qū)計(jì)算。采用等溫降法進(jìn)行計(jì)算。雙管同程式系統(tǒng)最不利循環(huán)環(huán)路與各并聯(lián)環(huán)路之間的計(jì)算壓力損失相對(duì)差額，不應(yīng)大于±15%。（1）選擇最不利環(huán)路；（2）計(jì)算通過最不利環(huán)路散熱器的作用壓力；（3）確定最不利環(huán)路個(gè)管段的管徑；（4）確定沿程壓力損失和局部阻力損失；（5）求環(huán)路壓力損失；（6）計(jì)算富余壓力；（7）確定其他立管及干管管徑；（8）求各立管的不平衡率，不平衡率應(yīng)在±10%以內(nèi)。5.2一二區(qū)水力計(jì)算5.2.1一二區(qū)水力計(jì)算簡(jiǎn)圖如下圖：5.1一二區(qū)水力計(jì)算簡(jiǎn)圖

一二層各有21個(gè)散熱器，分別用R1、2、321表示；供水干管用IG表示,系統(tǒng)有IG1、2、320、21段供水干管；回水干管用IH表示，系統(tǒng)有IH1、2、3、420.21段回水干管；供水立管用VG表示，回水立管用VH表示；總供水干管用DG表示，總回水干管用DH表示。5.2.2水力計(jì)算表表5.1一層水力計(jì)算表樓層總阻力(Pa)35749.37最不利環(huán)路'一樓層水力計(jì)算表編號(hào)Q(W)G(kg/h)L(m)D(mm)u(m/s)R(Pa/m)藝gAPy(Pa)APj(Pa)AP(Pa)DG64761.2227.72400.4887.821.17617034529564761.2227.72400.4887.821.176170345DH295IG164761.2227.72320.76179.510359035929IG262871.2162.72.7320.74170.62761714.2122.9IG3274.4320.73164.37172325798059498.2046.7IG4347320.7153.7611076239131557282.1970.5IG5413.3320.68143.481473222695IG655066.1894.23.5251.01388.8415952850.1818.0IG7663.5250.97360.5511262452171450634.1741.8IG8733.5250.93333.2811166415158248418.1665.6IG9817.6320.57105.681803158962IG146202.1589.34.6250.84281.76112963461642098IG1439871513.115.320.5288.811156IG141771.1436.95.9250.76234.3212135IG139555.1360.7250.72212.8447.532IG14而5而6而7而8而9応01而37339.335123.432907.530691.28801.626585.24369.82215.9IH6IH7IH8IH9IH1012345而6189030475262.97478.89694.711910.614126.516342.418558.320774.222990.12520627421.929637.831853.734069.635959.1284.471208.241132.021055.79990.78914.55838.3276.2365.02104.82181.04257.27333.5409.72485.95562.18638.41714.63790.86867.09943.311019.541095.771171.991237.05.156.75.4725.23.53.53.42.7廠3.53.57.64.615.65.957.55.156.75.4725.22525252525252515152020202025252525252532250.680.640.60.560.530.490.450.110.090^50^60^70^70.360.430.490.560.380.420.460.50.540.580.40.661919842261209170.89151.82133.81119.27103.2288.2413.6910.4123.7761.9115.37183.4481.96111.21144.48181.766.2579.4693.77109.125.61143.1256178.36111111145200134519006203613094728両433381642287389109883610334737038427837959271531341149641F32-6F1096288118152708610314216478209205375547640552324664467513494771216988110355880698494787411377IH18IH19IH20IH21638175.540391.462545.364761.211313.241389.462151.562227.793.53.53.47.8253232320.70.480.740.76198.8676.11168.44179.510.669626657314002361102641709323778371570散熱器進(jìn)出水管徑D均為15mm。表5.2二層水力計(jì)算表樓層總阻力(Pa)25880.62資用壓力(Pa)36223二樓層不平衡率12.70%編號(hào)Q(W)G(kg/h)L(m)D(mm)u(m/s)R(Pa/m)gAPy(Pa)APj(Pa)AP(Pa)DG443571525.882400.3342.091.58480164DH443571525.882400.3342.091.58480164IG1443571525.884320.81261.510104601046IG2432001486.084.6250.79249.17111463021448IG3410101410.746.9250.75226.591IG4388201335.413.5250.71205.2IG5366301260.073.5250.67184.451646217863IG6344401184.747250.63164.9111541921346IG7322501109.47.6250.59146.37111121681281IG8300601034.063.2250.55128.861412146559IG927870958.7311.45250.51112.39112871261413IG1025680883.397.65250.4796.971742107849IG1123490808.067.33250.4382.6160589695IG12130732.728.7250.3969.281603736762IG13IG14IG15IG16IG17IG18IG19IG20IG21

w巫0191101692014730128401065084606270408018901157^4755377727657.38582.05506.71441.7366.36291.02215.69140.3565.0239.8115.14190.47265.815.528.82.724.9215.83.52.14.66.9IH59917341.147202020202015151515151515IH6；21°416.487.620IH7IH8IH9IH10123而4而142971648718677208672305725247274372962733700.580.510.440.390.320.410.310.20.090.06060^70^80.49191.58153.8119.8793.7367.14143.7584.3539.5610.414.5127.9967.7122.28191.060.3684.38111111058326461106110062952772221193237428641161967350834619651218422534111110903412962622206273497706491.82567.15642.49717.82793.16868.5943.831019.17.181159.53.211.457.657.338.75.528.82.74.921F8202020252525252525亦0.430.50.560.380.420.460.50.540.580.62113.62146.79183.8166.7879.8894.109.26125.53140.39158.5836416811406489695962339691250690120154708612214216145418001560560781108348185226905.3三區(qū)水力計(jì)算5.3.1三區(qū)水力計(jì)算簡(jiǎn)圖圖5.2三區(qū)水力計(jì)算簡(jiǎn)圖三區(qū)共有18根立管，供水立管用VG表示，回水立管用VH表示；供水干管用BG表示，回水干管用BH表示。5.3.2水力計(jì)算表表5.3最不利環(huán)路水力計(jì)算表

最不利阻力(Pa)13117最不利環(huán)路立管9樓層2編號(hào)Q(W)G(kg/h)L(m)D(mm)u(m/s)R(Pa/m)gAPy(Pa)APj(Pa)AP(Pa)BG1138284757.01.6500.62101.70163016364133944607.5BG2173.4500.695.531325173498130354484.2BG3518500.5890.591725164889BG4122334208.36.9500.55879BG5114313932.56.9500.5170.9785BG6106303656.712.500.4760.81778109887158BG7951133271.8910.3500.4248.95150487592BG8854312938.836.6500.3839.731262713332647.17.5BG97695383400.57123.86BH1138284757.02.3500.62101.70.2341113458646BH1132614561.94.0500.5993.6913821705527698BH1124594286.1500.5682.9215801507316877BH0.357.04500.5272.811513131644BH1108563734.53.3500.4863.351209114323423BH9.4811.4500.4657.3BH13416.129930637.5500.4453.24139995495BH119037831098.42500.444.32137379452BH12787.715.08103946500.3635.86155963623BH9698112401.57.44400.52101.691757132888VG25192178.63.5150.2695.9233667402

表5.4干管水力計(jì)算表□n(W)QDu(m/a)A(pypa)A(pjpA(pa)pOGB44401X5a927725581XGB651X4034a69.662GB242347a8387o549BB1X952383aoo5514GB41X2353ao3695986BB1X532392ao34116GB045273a92.7GB75242a562722928GBO76508O216a399141XHB54344O22a73o59952HB31978O222a66342o933HB95272ao53737834HB89524a977286185HB821X233a285489266HB3a1X2324a738784297HB64093a59.8HB354064a5952o696其余供回水立管水力計(jì)算表見水力計(jì)算附表。VG38478291.64200.2452.04VH18478291.640.2200.2452.04VH2

"RT5882202.3444.653.5廠150.30.07121.97.21.515VG38478291.64200.2452.04VH18478291.640.2200.2452.04VH2

"RT5882202.3444.653.5廠150.30.07121.97.21.5152610410427

莎40408613144515125.4系統(tǒng)水力計(jì)算綜合系統(tǒng)最不利環(huán)路阻力損失為35749.37Pa，總供回水立管水力計(jì)算如下表表5.5總供回水立管號(hào)編Q(W)G(kg/h)L(m)D(mm)u(m/s)R(Pa/m)gAPy(Pa)APj(Pa)AP(Pa)VG11382864757.041.6500.62101.71.3163128289VH11339414607.573.4500.695.531325173498VG22280397753.671.3500.4963.981.5190150340VH22280397753.672.3500.4963.981.519173192由于最不利環(huán)路阻力損失大于城市管網(wǎng)壓力，所以本設(shè)計(jì)需設(shè)置加壓水泵即采用機(jī)械循環(huán)。具體管道管徑見圖紙。5.5管路壓力平衡分析圖由于本設(shè)計(jì)管路系統(tǒng)均為同程式，所以要做管路壓力平衡分析圖，這里只做三區(qū)