【《S地铁车站空调风系统设计计算案例》2300字】

)式中——局部阻力系数，查《实用供热空调设计手册》表11.3-1通风空调风管系统常用配件的局部阻力损失得——风管局部阻力发生处的空气流速，ms——空气密度，kgm1.2送风系统水力计算空调系统送风由左右两个机房共同负担，左侧机房风管布置及标号如下图所示图1.1左侧机房空调送风水力计算图水力计算结果如下表所示表1.2左侧机房空调送风水力计算结果管段标号流量（m3管段长度（m）风管管径（mm×mm）流速(局部压力损失（Pa）沿程压力损失（Pa）管段总损失（Pa）17278031.952000×16006.740.1927.180.3621819217.51600×8003.950.229.330.96390962.41600×4003.950.189.331.88475801.91600×4003.290.126.481.88560641.91000×4004.210.1410.611.88645481.91000×4003.160.271.971.88730321.9400×4001.260.2116.581.88815161.9400×4002.630.354.151.28990969.71600×4003.950.189.332.711075801.91600×4003.290.126.481.881160641.91000×4004.210.1410.611.881245481.91000×4003.160.271.971.881330321.9400×4001.260.2116.581.881415161.9400×4002.630.354.151.2815545887.62000×16001.050.1511.292.1116500394.22000×16004.630.2312.851.2817454904.22000×16004.210.2110.621.2818409414.22000×16003.790.188.601.8819363924.21600×12501.050.211.291.2820318434.21600×12504.420.1711.711.8821272944.21600×12503.790.218.601.2822227454.21600×12503.160.151.971.8823181964.21000×8006.320.1823.891.8824136474.21000×8004.740.2813.441.882590984.21000×8003.160.291.971.882645494.21000×8001.580.241.491.28 由计算结果可知，最不利环路由1-15-16-17-18-19-20-21-22-23-24-25-26构成，总压力损失252.43Pa。 各分支环路阻力平衡校核如下表表1.3左侧机房送风系统各环路阻力损失及不平衡率编号环路构成管段总损失（Pa）不平衡率（%）11-2-3-4-5-6-7-8132.9047.3521-2-9-10-11-12-13-14141.9643.7631-15-16-17-18-19-20-21-22-23-24-25-26252.430.00 由计算结果可知，环路1的不平衡率47.35%>15%，认为不平衡，需加装需加装对开式多叶调节阀进行平衡。环路2的不平衡率43.76%>15%，认为不平衡，需加装需加装对开式多叶调节阀进行平衡。 为平衡环路上各个风口送风风量，应用对开式多叶阀对各个风口风量进行平衡。右侧机房风管布置及标号如下图所示图1.2右侧机房空调送风水力计算图 水力计算结果如下表所示表1.4右侧机房空调送风水力计算结果管段标号流量（m3管段长度（m）风管管径（mm×mm）流速(局部压力损失（Pa）沿程压力损失（Pa）管段总损失（Pa）1727803.32000×16006.5711.500.6316.132181926.41600×8003.958.961.4110.36390960.61600×4003.9517.540.1117.65475801.91600×4003.2912.180.7112.89560641.91000×4004.2119.950.8320.78645481.91000×4003.1611.221.5912.82730321.9400×4001.2631.181.2432.42815161.9400×4002.631.312.077.37990967.91600×4003.9521.281.4226.701075801.91600×4003.2912.180.7112.891160641.91000×4004.2119.950.8320.781245481.91000×4003.1611.221.5912.821330321.9400×4001.2631.181.2432.421415161.9400×4002.631.312.077.37155458842000×16001.0519.110.6019.7116136474.21000×8004.7443.000.7643.761790984.21000×8003.1611.231.1812.401845494.21000×8001.582.811.224.0319409414.21600×12501.6936.381.0137.3920363924.21600×12501.0539.750.8440.5921318434.21600×12504.4222.010.7122.7222272944.21600×12503.7911.010.8811.8923227454.21600×12503.1611.230.6311.8624181964.21000×8006.3244.910.7641.6725136474.21000×8004.7421.261.1826.442690984.21000×8003.1611.231.2212.452745494.21000×8001.582.811.013.82 由计算结果可知，最不利环路由1-15-20-21-22-23-24-25-26-27构成，总压力损失211.34Pa。表1.5右侧机房送风系统各环路阻力损失及不平衡率编号环路构成管段总损失（Pa）不平衡率（%）11-2-3-4-5-6-7-8130.4147.5621-2-9-10-11-12-13-14139.4643.9131-15-16-17-18-1996.0361.3841-15-20-21-22-23-24-25-26-27248.670.00 由计算结果可知，环路1不平衡率为47.56%>15%，认为不平衡，需加装对开式多叶调节阀进行平衡。环路2的不平衡率43.91%>15%，认为不平衡，需加装需加装对开式多叶调节阀进行平衡。环路3的不平衡率61.38%>15%，认为不平衡，需加装需加装对开式多叶调节阀进行平衡。 为平衡环路上各个风口送风风量，应用对开式多叶阀对各个风口风量进行平衡。1.3回风系统水力计算空调系统送风由左右两个机房共同负担，左侧机房回风管布置及标号如下图所示图1.3左侧机房空调回风水力计算图水力计算结果如下表所示表1.6左侧机房空调回风水力计算结果管段标号流量（m3管段长度（m）风管管径（mm×mm）流速(局部压力损失（Pa）沿程压力损失（Pa）管段总损失（Pa）13213448.51600×10001.5831.1711.1646.332718417.8800×6303.9661.024.2769.29353885800×6302.9731.640.7032.344359215630×4003.9654.791.5560.34517965630×4001.9813.700.5014.2062495051600×10004.3370.170.7070.8771996081600×10003.4743.090.7243.8181497081600×10002.6023.612.3221.939998081000×8003.4741.971.1243.0910499081000×8001.7310.490.3210.81由计算结果可知，最不利环路由1-6-7-8-9-10构成，总压力损失240.83Pa。环路1-2-3-4-5的总压力损失为222.50Pa，与最不利环路的不平衡率为7.6%<15%，满足对管路不平衡率的要求。 右侧机房回风管布置及标号如下图所示图1.4左侧机房空调回风水力计算图水力计算结果如下表所示表1.7左侧机房空调回风水力计算结果管段标号流量（m3管段长度（m）风管管径（mm×mm）流速(局部压力损失（Pa）沿程压力损失（Pa）管段总损失（Pa）13213448.51600×10001.5831.1711.1646.332718417.8800×6303.9661.024.2769.29353885800×6302.9731.640.7032.344359215630×4003.9654.791.5560.34517965630×4001.9813.700.5014.2062495051600×10004.3370.170.7070.8771996081600×10003.4743.090.7243.81