广州实验楼五楼-正文.doc

制冷工艺设计第一章 制冷系统第一节 制冷系统概述试计算广州七号教学楼第1.2层实验室夏季的空调计算负荷已知条件：（1）实验室平面尺寸如图所示，层高为3100mm。（2）西外墙：外墙构造如下： 水泥砂浆；砖墙，=370mm；白灰粉刷；属于型，传热系数K=1.50W/(m2K)。（3）外窗：单层窗，3mm厚普通玻璃钢窗； 80%玻璃；无窗帘，窗高1800mm。（4）内墙：邻室包括走廊，均与实验室的温度相同。（5）假设进入105的人数都为50人，107.109.206.209.210.211的为5人，实验时间为60分钟。（6）室内压力稍高于室外大气压力。（7）由于该层房间属于实验室，实验时间都在白天，照明设备的散热可以忽略；人员在内的时间也很短暂，因此人员散热的冷负荷也可忽略。（8）空调设计运行时间12小时。（9）广州市室外气象条件： 1）北纬2303 2）东经11319 3 ）海拔6.6m 4）大气压力：夏季1019.5hpa，冬季1004.5hpa 5）室外空气计算参数，夏季：空调室外计算干球温度33.5 C，空调室外计算湿球温度27.7 C。（10）实验室计算参数：夏季：室内空气干球温度26C，室内空气相对湿度65%；新风量：30m3/(人h)。第二节 制冷系统方案确定 计算沈阳某实验楼第五层实验室夏季的空调计算负荷，建议采用风机盘管加新风系统方案。新风经除湿(非冷却除湿)后承担室内湿负荷，风机盘管承担室内显热冷负荷。新风与用1518 C冷冻水冷却的盐溶液(如氯化锂溶液)直接接触，实现对新风冷却去湿处理，使新风处理后的含湿量小于室内含湿量，温度降到室内温度；风机盘管也采用1518 C冷冻水对室内空气进行冷却（承担室内显热冷负荷）。这种方案的特点，是风机盘管与新风分别对室内的温度和湿度进行独立控制。 第二章制冷负荷计算 设计:按本设计给出的条件，分项计算如下所示：第一节101室的冷负荷计算北外墙时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc32.332.131.831.031.431.331.231.231.331.431.631.832.1td1.7ka1k0.94tc(t)31.9631.7831.4930.7431.1131.0230.9330.9331.0231.1131.3031.4931.77tR26t5.965.785.494.745.115.024.934.935.025.115.305.495.77K1.5A20.4Qc(t)182.38176.87167.99145.04156.37153.61150.86150.86153.61156.37162.18167.99176.56北外窗瞬时传热冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc(t)26.927.929.029.930.831.531.932.232.232.031.630.829.9td127.928.930.030.931.832.532.933.233.233.032.631.830.9tR26t1.92.94.04.95.86.56.97.27.27.06.65.84.9Kw5.94A9Qc(t)101.57155.03213.84261.94310.07347.49368.87384.91384.91374.22352.84310.07261.94北窗透入日射得热引起的冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00Clq0.520.550.590.630.660.680.680.680,690.690,600.400.37Dj,134Ca0.85Aw9Qc(t)533.05563.81604.81645.81676.57697.07697.07697.07707.32707.32615.06410.04379.29QZ817895.71986.641052.791143.011198.171216.81232.841245.841237.911130.08888.1767.79由上表可以看出，此实验室最大冷负荷值出现在16:00时，其值为1245.84w，另外，夏季新风负荷计算如下：根据已知条件，每人的新风量为30m3h,有湿空气性质表查得：室内空气焓值为63.43kjkg(Tr=26.0, =65%);室外空气焓值为81. 32kjkg(To=33.2,Ts=26.4).新风负荷为： Q=Ma*(ho-hr) =1.2* (303600)*20*(81.32-63.43) =3.578kw=3578w 第二节 102与202室的制冷负荷的计算北外墙时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc32.332.131.831.031.431.331.231.231.331.431.631.832.1td1.7ka1k0.94tc(t)31.9631.7831.4930.7431.1131.0230.9330.9331.0231.1131.3031.4931.77tR26t5.965.785.494.745.115.024.934.935.025.115.305.495.77K1.5A20.4Qc(t)182.38176.87167.99145.04156.37153.61150.86150.86153.61156.36162.18167.99176.56西外墙时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc37.837.336.836.335.935.535.234.934.834.834.935.335.8td0ka1k0.94tc(t)35.53235.06234.59234.12233.74633.3733.08832.80632.71232.71232.80633.18233.652tR26K1.5A24.15t9.539.068.598.127.757.377.096.816.716.716.817.187.65Qc(t)345.22328.2311.17294.15280.74266.98256.84246.7243.07243.07246.7260.1277.12北外窗瞬时传热冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc(t)26.927.929.029.930.831.531.932.232.232.031.630.829.9td127.928.930.030.931.832.532.933.233.233.032.631.830.9tR26t1.92.94.04.95.86.56.97.27.27.06.65.84.9Kw5.94A9Qc(t)101.57155.03213.84261.94310.07347.49368.87384.91384.91374.22352.84310.07261.94北窗透入日射得热引起的冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00Clq0.520.550.590.630.660.680.680.680,690.690,600.400.37Dj,134Ca0.85Aw9Qc(t)533.05563.81604.81645.81676.57697.07697.07697.07707.32707.32615.06410.04379.29QZ1162.221223.911297.811346.941423.751465.151473.641479.541488.911480.981376.781148.21044.91由上表可以看出，此实验室最大冷负荷值出现在16:00时，其值为1488.91w，另外，夏季新风负荷计算如下：根据已知条件，每人的新风量为30m3h,有湿空气性质表查得：室内空气焓值为63.43kjkg(Tr=26.0, =65%);室外空气焓值为81. 32kjkg(To=33.2,Ts=26.4).新风负荷为： Q=Ma*(ho-hr) =1.2* (303600)*20*(81.32-63.43) =3.578kw=3578w 第三节 103与203室的制冷负荷的计算南外墙时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc(t)34.634.233.933.533.232.932.832.933.133.433.934.434.9td-1.9ka1k0.94tc(t)30.7430.3630.0829.7029.4229.1429.0529.1429.3329.6130.0830.5531.02tR26t4.744.364.083.703.423.143.053.143.333.614.084.555.02K1.5A15.15Qc(t) 107.7299.0892.7284.0877.7271.3669.3171.3675.6782.0492.72103.40114.08西外墙时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc37.837.336.836.335.935.535.234.934.834.834.935.335.8td0ka1k0.94tc(t)35.53235.06234.59234.12233.74633.3733.08832.80632.71232.71232.80633.18233.652tR26K1.5A24.15t9.539.068.598.127.757.377.096.816.716.716.817.187.65Qc(t)345.22328.2311.17294.15280.74266.98256.84246.7243.07243.07246.7260.1277.12南外窗瞬时传热冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc(t)26.927.929.029.930.831.531.932.232.232.031.630.829.9td1tR26t1.92.94.04.95.86.56.97.27.27.06.65.84.9Kw5.94A9Qc(t)101.57155.03213.84261.95310.07347.49368.87384.91384.91374.22352.84310.07261.95南外窗透入日射得热引起的冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00Clq0.330.420.480.540.590.700.700.570.520.440.350.300.28Dj,146Ca0.85Aw9Qc(t)368.58469.1536.11603.13659.0781.83781.83636.63580.79491.44390.92335.07312.73Qz923.091051.411153.841243.31298.21467.661476.851339.61284.441290.771083.161008.64965.87由上表可以看出，此实验室最大冷负荷值出现在14:00时，其值为1476.85w，另外，夏季新风负荷计算如下：根据已知条件，每人的新风量为30m3h,有湿空气性质表查得：室内空气焓值为63.43kjkg(Tr=26.0, =65%);室外空气焓值为81. 32kjkg(To=33.2,Ts=26.4).新风负荷为： Q=Ma*(ho-hr) =1.2* (303600)*20*(81.32-63.43) =3.578kw=3578w第四节 104与204室的制冷负荷的计算南外墙时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc(t)34.634.233.933.533.232.932.832.933.133.433.934.434.9td-1.9ka1k0.94tc(t)30.7430.3630.0829.7029.4229.1429.0529.1429.3329.6130.0830.5531.02tR26t4.744.364.083.703.423.143.053.143.333.614.084.555.02K1.5A15.15Qc(t) 107.7299.0892.7284.0877.7271.3669.3171.3675.6782.0492.72103.40114.08南外窗瞬时传热冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc(t)26.927.929.029.930.831.531.932.232.232.031.630.829.9td1tR26t1.92.94.04.95.86.56.97.27.27.06.65.84.9Kw5.94A9Qc(t)101.57155.03213.84261.95310.07347.49368.87384.91384.91374.22352.84310.07261.95南外窗透入日射得热引起的冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00Clq0.330.420.480.540.590.700.700.570.520.440.350.300.28Dj,146Ca0.85Aw9Qc(t)368.58469.1536.11603.13659.0781.83781.83636.63580.79491.44390.92335.07312.73Qz577.87723.21842.67949.151017.461200.681220.011092.91041.371047.7836.46748.54688.75由上表可以看出，此实验室最大冷负荷值出现在14:00时，其值为1220.01w，另外，夏季新风负荷计算如下：根据已知条件，每人的新风量为30m3h,有湿空气性质表查得：室内空气焓值为63.43kjkg(Tr=26.0, =65%);室外空气焓值为81. 32kjkg(To=33.2,Ts=26.4).新风负荷为： Q=Ma*(ho-hr) =1.2* (303600)*20*(81.32-63.43) =3.578kw=3578w第五节105与205室的制冷负荷的计算北外墙时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc32.332.131.831.031.431.331.231.231.331.431.631.832.1td1.7ka1k0.94tc(t)31.9631.7831.4930.7431.1131.0230.9330.9331.0231.1131.3031.4931.77tR26t5.965.785.494.745.115.024.934.935.025.115.305.495.77K1.5A28.8Qc(t)257.47249.7237.17204.77220.75216.86212.98212.98216.86220.75228.96237.17249.26东外墙时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc36.035.535.235.035.035.235.636.136.637.137.537.938.2td0ka1k0.94tc(t)33.8433.3733.0932.932.933.0933.4633.9334.434.8735.2535.6335.91tR26t7.847.377.096.96.97.097.467.938.48.879.259.639.91K1.5A28.35Qc(t)333.4313.41301.5293.42293.42301.5317.24337.22357.21377.2393.36409.52421.42北外窗瞬时传热冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc(t)26.927.929.029.930.831.531.932.232.232.031.630.829.9td127.928.930.030.931.832.532.933.233.233.032.631.830.9tR26t1.92.94.04.95.86.56.97.27.27.06.65.84.9Kw5.94A9Qc(t)101.57155.03213.84261.94310.07347.49368.87384.91384.91374.22352.84310.07261.94北窗透入日射得热引起的冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00Clq0.520.550.590.630.660.680.680.680,690.690,600.400.37Dj,134Ca0.85Aw9Qc(t)533.05563.81604.81645.81676.57697.07697.07697.07707.32707.32615.06410.04379.29人员散热引起的冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00Clq0.580.660.720.770.80.830.850.870.890.900.910.920.93qs,60.5n50v0.93Qc（t）1631.691856.752025.542166.22250.623352391.262447.532503.82531.932560.062588.192616.32ql73.3Qc3408.25合计5040.1452655433.795574.455658.855743.255799.515855.785912.055940.185968.315996.446024.57照明散热引起的冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00Clq0.110.10.090.080.070.060.370.670.710.740.760.790.81n11.2n21N220Qc（t）29.0426.423.7621.1218.4815.8497.68176.88187.44195.36200.64208.56213.84Qz6294.676573.356814.877001.517178.147322.017493.277664.847765.797815.037759.177571.87500.32由上表可以看出，此实验室最大冷负荷值出现在17:00时，其值为7815.03w，另外，夏季新风负荷计算如下：根据已知条件，每人的新风量为30m3h,有湿空气性质表查得：室内空气焓值为63.43kjkg(Tr=26.0, =65%);室外空气焓值为81. 32kjkg(To=33.2,Ts=26.4).新风负荷为： Q=Ma*(ho-hr) =1.2* (303600)*20*(81.32-63.43) =3.578kw=3578w第六节106文印室与空房间的制冷负荷的计算东外墙时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc(t)36.035.535.235.035.035.235.636.136.637.137.537.938.2td0ka1k0.94tc(t)33.8433.3733.0932.932.933.0933.4633.9334.4 34.8735.2535.6335.91tR26t7.847.377.096.96.97.097.467.938.48.879.259.639.91K1.5A10.05Qc(t)118.19111.1106.88104.02104.02106.88112.46119.54126.63133.72139.44145.17149.39东外窗瞬时传热冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc26.927.92929.930.831.531.932.232.23231.630.829.9td127.928.93030.931.832.532.933.233.23332.631.830.9tR26t1.92.944.95.86.56.97.27.276.65.84.9Kw5.94Aw1.5Qc(t)16.9325.8435.6443.6651.6857.9261.4864.1564.1562.3758.8151.6843.66东窗透入日射得热引起的冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00Clq0.480.610.570.380.310.300.290.280.270.230.210.180.17Dj,509Ca0.85Aw1.5Qc(t)311.51395.88369.92246.61201.18194.7188.2181.71175.22149.27136.29116.82110.33QZ446.63532.82512.44394.39356.88359.5362.14365.4366345.36334.54313.67303.38由上表可以看出，此实验室最大冷负荷值出现在16:00时，其值为366w，另外，夏季新风负荷计算如下：根据已知条件，每人的新风量为30m3h,有湿空气性质表查得：室内空气焓值为63.43kjkg(Tr=26.0, =65%);室外空气焓值为81. 32kjkg(To=33.2,Ts=26.4).新风负荷为： Q=Ma*(ho-hr) =1.2* (303600)*20*(81.32-63.43) =3.578kw=3578w第七节 107学生会.209与210的制冷负荷的计算东外墙时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc(t)36.035.535.235.035.035.235.636.136.637.137.537.938.2td0ka1k0.94tc(t)33.8433.3733.0932.932.933.0933.4633.9334.4 34.8735.2535.6335.91tR26t7.847.377.096.96.97.097.467.938.48.879.259.639.91K1.5A10.05Qc(t)118.19111.1106.88104.02104.02106.88112.46119.54126.63133.72139.44145.17149.39东外窗瞬时传热得热冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc26.927.92929.930.831.531.932.232.23231.630.829.9td127.928.93030.931.832.532.933.233.23332.631.830.9tR26t1.92.944.95.86.56.97.27.276.65.84.9Kw5.94Aw1.5Qc(t)16.9325.8435.6443.6651.6857.9261.4864.1564.1562.3758.8151.6843.66东窗透入日射得热引起的冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00Clq0.480.610.570.380.310.300.290.280.270.230.210.180.17Dj,509Ca0.85Aw1.5Qc(t)311.51395.88369.92246.61201.18194.7188.2181.71175.22149.27136.29116.82110.33人员散热引起的冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00Clq0.580.660.720.770.80.830.850.870.890.900.910.920.93qs,60.5n5v0.93Qc（t）163.17185.68202.55216.62225.06233.5239.13244.75250.38253.19256.01258.82261.63ql73.3Qc340.83合计504526.51543.38557.45565.89574.33579.96585.58591.21594.02596.84599.65602.46照明散热引起的冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00Clq0.110.10.090.080.070.060.370.670.710.740.760.790.81n11.2n21N220Qc（t）29.0426.423.7621.1218.4815.8497.68176.88187.44195.36200.64208.56213.84Qz979.671085.731079.58972.86941.25949.671039.781127.861144.651134.741132.021121.881119.7由上表可以看出，此实验室最大冷负荷值出现在16:00时，其值为1144.65w，另外，夏季新风负荷计算如下：根据已知条件，每人的新风量为30m3h,有湿空气性质表查得：室内空气焓值为63.43kjkg(Tr=26.0, =65%);室外空气焓值为81. 32kjkg(To=33.2,Ts=26.4).新风负荷为： Q=Ma*(ho-hr) =1.2* (303600)*20*(81.32-63.43) =3.578kw=3578w第八节108仓库的冷负荷计算东外墙时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc(t)36.035.535.235.035.035.235.636.136.637.137.537.938.2td0ka1k0.94tc(t)33.8433.3733.0932.932.933.0933.4633.9334.4 34.8735.2535.6335.91tR26t7.847.377.096.96.97.097.467.938.48.879.259.639.91K1.5A10.5Qc(t)123.48116.08111.67108.68108.68111.67117.5124.9132.3139.7145.69151.67156.08由上表可以看出，此实验室最大冷负荷值出现在20:00时，其值为156.08w，另外，夏季新风负荷计算如下：根据已知条件，每人的新风量为30m3h,有湿空气性质表查得：室内空气焓值为63.43kjkg(Tr=26.0, =65%);室外空气焓值为81. 32kjkg(To=33.2,Ts=26.4).新风负荷为： Q=Ma*(ho-hr) =1.2* (303600)*20*(81.32-63.43) =3.578kw=3578w第九节 109传达室与211的冷负荷计算东外墙时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc(t)36.035.535.235.035.035.235.636.136.637.137.537.938.2td0ka1k0.94tc(t)33.8433.3733.0932.932.933.0933.4633.9334.4 34.8735.2535.6335.91tR26t7.847.377.096.96.97.097.467.938.48.879.259.639.91K1.5A10.05Qc(t)118.19111.1106.88104.02104.02106.88112.46119.54126.63133.72139.44145.17149.39南外墙时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00tc(t)34.634.233.933.533.232.932.832.933.133.433.934.434.9td-1.9ka1k0.94tc(t)30.7430.3630.0829.729.4229.1429.0529.1429.3329.6130.0830.5531.02tR26t4.744.364.083.73.423.143.053.143.333.614.084.555.02K1.5A17.85Qc(t)126.91116.74109.2499.0791.5784.0781.6684.0789.1696.66109.24121.83134.41东外窗瞬时传热得热冷负荷时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00