【某宾馆暖通空调系统的风系统和水系统的设计计算案例2300字】

某宾馆暖通空调系统的风系统和水系统的设计计算案例目录TOC\o"1-3"\h\u2931风系统设计 131761.1风管布置 133411.2风系统的水力计算[1] 27701.风管沿程压力损失可按下式计算： 2235222.单位管长沿程摩擦阻力ΔPm可按下式计算： 3311593.风管局部压力损失 3237531.3计算结果 471842水系统设计 526192.1水管布置 5193032.2水系统的水力计算[5] 5301491.沿程阻力 5149042.局部阻力 6150202.3计算结果 6180712.4冷凝水管的设计[1] 91风系统设计1.1风管布置风机盘管系统布置以建筑的第一层为例，见图3。图3一层风管布置图1.2风系统的水力计算[1]目前，风管的水力计算方法有压损平均法、假定流速法、静压复得法和T计算法(T-Method)等几种。本建筑风管的水力计算采用假定流速法。假定流速法是以风管内空气流速作为控制指标，这个空气流速应按照噪声控制、风管自身的强度，并结合运行费用等因素来进行设定。依据风管的风量和选定的流速，确定风管的断面尺寸，进而计算压力损失，再根据各环路的压力损失进行调整，以达到均衡。1.风管沿程压力损失可按下式计算：Δ 式中ΔPm—单位管长沿程阻力，Pa/m；l—风管长度，m；2.单位管长沿程摩擦阻力ΔPm可按下式计算：Δ式中λ—摩擦阻力系数；ρ—空气密度，kg/m3；de—风管当量直径m；3.风管局部压力损失Δ式中ξ—局部阻力系数；V—风管内局部压力损失发生处得空气流速，m/s；ρ—空气密度，kg/m31.3计算结果以一层风系统计算为例，风管的水力计算结果见下表9。编号G(m^3/h)L(m)形状D/W(mm)H(mm)υ(m/s)ΔPy(Pa)ΔPj(Pa)ΔP(Pa)16703.53.57矩形8004005.822.4218.4420.8526426.76.45矩形8004005.584.0419.824.0434889.27.06矩形8003205.314.8516.884.85431981.38矩形5003205.551.2522.9224.185319811.89矩形5003205.5510.84.5610.863105.810.15矩形5003205.398.7320.8129.5473105.81.4矩形5003205.391.220.9922.1983105.810.37矩形5003205.398.916.48.9191875.80.26矩形3203205.090.2518.2118.47101875.85.17矩形3203205.095.0918.0123.1111875.80.56矩形3203205.090.553.050.551217228.8矩形3202505.9813.7626.5540.3113172210.27矩形3202505.9816.0643.2944.4814153.82.51矩形1201202.973.118.6221.7215153.812.3矩形1201202.9715.1714.3829.5516123011.34矩形3203203.345.115.1620.261712300.88矩形3203203.340.397.758.1418123010.8矩形3203203.344.8618.1923.041992.23.33矩形1201201.781.6311.7513.38201691.29.94矩形6302502.983.1722.6125.78211537.56.29矩形6302003.393.1117.8320.94221537.510.56矩形6302003.395.228.5613.78231537.58.06矩形6302003.393.9818.7722.7524276.83.76矩形16016033.325.0528.3525276.83.13矩形16016032.7514.7417.49表9一层风管水利计算2水系统设计2.1水管布置水管的布置以建筑第一层为例，具体布置见图6。图6一层水管布置图2.2水系统的水力计算[5]1.沿程阻力水在管道内的沿程阻力ℎR式中λ——摩擦阻力系数，无因次量；l——直管段长度，m；d——管道内径，m；ρ——水的密度，1000kg/m3。摩擦阻力系数λ与流体的性质、流态、流速、管内径大小、内表面的粗糙度有关，过渡区的λ可按Colebrook公式计算：1式中K——管内表面的当量绝对粗糙度，m；闭式系统K=0.2mm，开式系统K=0.5mm，冷却水系统K=0.5mm；Re——雷诺数；2.局部阻力水流动时遇到弯头、三通及其他异型配件时，因摩擦及涡流耗能而产生的局部阻力为：ℎ局部阻力可用某一长度、相同管径的直管道阻力来取代，称局部阻力当量长度。l式中ξ——局部阻力系数；d——管道内径，mm。2.3计算结果空调水路的水力计算结果以建筑第一层为例，见下表10。表10一层水管水利计算最不利环路阻力(Pa)91625最有利环路阻力52447楼层内不平衡率编号Q(W)G(kg/h)L(m)D(mm)υ(m/s)R(Pa/m)ΣξΔPy(Pa)ΔPj(Pa)不平衡率FG115720027038.414.931000.8791.421.89136571120760.00%FG212330021207.68.5801.14216.361.12183873225700.00%FG311610019969.21.75801.08192.630.1336583940.00%FG410710018421.20.59800.99164.880.197491460.00%FG59810016873.21800.91139.270.1139411800.00%FG68910015325.25.81800.83115.80.1673347070.00%FG78370014396.44.15800.78102.740.1427304570.00%FG87830013467.63.12651.03221.30.1689537420.00%FG97290012538.85.9650.96192.860.111394611850.00%FG106570011300.420.48650.86157.951.1323541136460.00%FG1140500696615.57500.88223.892.5348696244480.00%FG123600061926.35500.78178.71.1113433414680.00%F83.28400.85292.10.1959369950.00%FG141800030961.25400.65177.140.1222212430.00%F44.93500.5590.772.544837282016.20%FH115720027038.414.251000.8791.421.89130371120140.00%FH212330021207.68.63801.14216.361.12186773225990.00%FH311610019969.21.75801.08192.630.1336583940.00%FH410710018421.20.59800.99164.880.197491460.00%FH59810016873.21800.91139.270.1140411810.00%FH68910015325.26.31800.83115.80.1731347650.00%FH78370014396.44.15800.78102.740.1427304570.00%FH87830013467.63.12651.03221.30.1689537420.00%FH97290012538.84.82650.96192.860.1929469750.00%FH106570011300.421.5650.86157.951.1339641138070.00%FH1140500696615.1500.88223.892.5338096243420.00%FH123600061926.89500.78178.71.1123133415650.00%F82.98400.85292.10.1871369070.00%FH141800030961.55400.65177.140.1275212960.00%F45.21500.5590.772.547337284516.20%E15400928.824.15250.42127.559.23080808388817.50%E2126002167.26.99320.63201.991411176231730.00%E35400928.88.2250.42127.5591045790183522.10%E4126002167.27.01320.63201.991415176231774.40%E5450077435.16250.3590.93153197915411221.80%E6126002167.215.24320.63201.99.23078180148790.00%E7126002167.27.96320.63201.99160676223682.80%E872001238.48.5250.56218.7291858405226312.20%E95400928.87.46250.42127.559952790174215.80%E105400928.87.46250.42127.559952790174216.80%E115400928.87.46250.42127.559952790174217.50%E129000154835.12320.45107.1663763599436215.20%E139000154827.58320.45107.1662955599355416.40%E149000154817.02320.45107.1661824599242318.00%E1572001238.410.29250.56218.7262250937318717.60%E16339005830.88.17500.73159.34513021348265011.90%2.4冷凝水管的设计[1]设计冷凝水排水系统时，应留意下列事项:1.水平于管一定沿水流方向保持不小于2/1000的坡度;衔接设施的水平支管，应保持不小于1/100的坡度。2.当冷凝水收集安装位置位于空气处理装置的负压区时，出水口处必需设置水封；水封的高度，应比凝水盘处的负压(相当于水柱高度)大约50%。水封的出口，应与大气相通，一般可通过排水漏斗与排水系统连接。3.因为冷凝水在管道内是依附位差自流的，因而，极易侵蚀。管材宜优先采用塑料管，如PVC、UPVC管或钢衬塑管，避免采用金属管道。4.设计冷凝水系统时，必需结合当时详细环境进行防结露验算;若外表有结露可能时应该对冷凝水管进行绝热处置。5.冷凝水立管的直径，应与水平干管的直径保持相同。6.冷凝水立管的顶部，应设置通向大气的透气管。7设计冷凝水系统时，应充分考虑对系统定期进行冲洗的可能性。8.冷凝水管的管径，应根据冷凝水量和敷设坡度通过计算确定。普通情况