空调冷负荷计算plWord版

1、空调冷负荷计算一、屋顶冷负荷表1:屋顶冷负荷由附录8差得屋顶冷负荷计算温度逐时值twl，即可以按照CL=KF(t'w1-tNx)和式t'w1（twl+td）kk。算出屋顶逐时值冷负荷，计算结果如下:时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00twl38.1 37.0 36.1 35.6 35.6 36.0 37.0 38.4 40.1 41.9 43.7 45.4 46.7 td0.1Ka0.97Kp1.0 t'wl37.05 35.9935.1134.6334.6335.0235.9

2、937.3538.9940.7442.4944.1445.40tNx26 K0.48 F24000*15000=360CL1909.441726.271574.211491.261491.261558.661726.271961.282244.672547.072849.473134.593352.322 / 22二、东外墙冷负荷表2:东外墙冷负荷由附录7查得东外墙冷负荷计算温度逐时值twl，即可以按照CL=KF(t'w1-tNx)和式t'w1（twl+td）kk。算出屋顶逐时值冷负荷，计算结果如下:时间8:009:0010:0011:0012:0013:0014:0015:0

3、016:0017:0018:0019:0020:00twl36.0 35.5 35.2 35.0 35.0 35.2 35.6 36.1 36.6 37.1 37.5 37.9 38.2 td0.5Ka0.97Kp1.0 t'wl35.41 34.92 34.63 34.44 34.44 34.63 35.02 35.50 35.99 36.47 36.86 37.25 37.54 tNx26t9.41 8.92 8.63 8.44 8.44 8.63 9.02 9.50 9.9910.4710.86 11.2511.54K1.5F15000*6000-2000*2000*2=82CL

4、1157.431097.161061.491038.121038.121061.491109.461168.501228.771287.811335.781383.75 1419.42三、南外墙冷负荷表3:南外墙冷负荷由附录7查得南外墙冷负荷计算温度逐时值twl，即可以按照CL=KF(t'w1-tNx)和式t'w1（twl+td）kk。算出屋顶逐时值冷负荷，计算结果如下:时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00twl34.634.233.933.533.232.932.832.933.13

5、3.433.934.434.9td-0.8Ka0.97Kp1.0 t'wl32.79 32.40 32.11 31.72 31.43 31.14 31.04 31.14 31.33 31.62 32.11 32.59 33.08 tNx26t6.79 6.40 6.11 5.72 5.83 5.14 5.04 5.14 5.33 5.62 6.11 6.59 7.08 K1.5F24000*6000-2000*2000*6=120CL1222.20 1152.00 1099.80 1029.60 977.40 925.20 907.20 925.20 959.40 1011.60 10

6、99.80 1186.20 1274.40 四、东外窗瞬时传热冷负荷表4:东外窗瞬时传热冷负荷根据ai8.7w/(.k)，ao=3.5+5.6*v=22.54w/(.k),由附录11查得Kw=3.101w/(.k)。由附录12查得玻璃窗传热系数修正值，金属窗框双层窗，80%玻璃应乘以1.2的修正值。由附录13查得玻璃窗冷负荷计算温度的逐时值twl，根据公式CL=CwKwFw(tw1+td-tNx)，计算得下表:时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00twl26.927.929.0 29.930.831.5

7、31.932.232.232.0 31.630.829.9td1twl+td27.928.93030.931.832.532.933.233.23332.631.830.9tNx26t1.92.944.95.86.56.97.27.276.65.84.9CwKw3.708Fw2000*2000*2=8CL46.7971.4198.50120.66142.82160.06170.02177.29177.29172.37162.52142.82120.66137.8272137.8272137.8272137.8272137.8272137.8272137.8272137.8272137.8272

8、五、南外窗瞬时传热冷负荷表5:南外窗瞬时传热冷负荷根据ai8.7w/(.k)，ao=3.5+5.6*v=22.54w/(.k)，由附录11查得Kw=3.101w/(.k)。由附录12查得玻璃窗传热系数修正值，金属窗框双层窗，80%玻璃应乘以1.2的修正值。由附录13查得玻璃窗冷负荷计算温度的逐时值twl，根据公式CL=CwKwFw(tw1+td-tNx)，计算得下表:时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00twl26.927.92929.930.831.531.932.232.23231.630.829.

9、9td1twl+td27.928.93030.931.832.532.933.233.23332.631.830.9tNx26t1.92.944.95.86.56.97.27.276.65.84.9CwKw3.708Fw2000*2000*6=24CL140.37214.23295.50361.98428.46480.18510.06531.87531.87517.11487.56428.46361.98413.4816413.4816413.4816413.4816413.4816413.4816413.4816413.4816413.4816六、东窗日射得热引起的冷负荷表6:东窗日射得热引

10、起的冷负荷由附录19查得双层钢窗有效面积系数Ca=0.75,故窗的有效面积Fw=8*0.75=6.由附录17查得玻璃窗的遮阳系数Cs=0.86；由附录18查得玻璃窗内的遮阳设施的遮阳系数Ci=0.5。于是综合遮挡系数Ccs=CsCi=0.86*0.5=0.43，再由附录16查得上海在纬度30°10'东向日射得热因数最大值为539w/。由附录21查得北区有内遮阳的玻璃窗冷负荷系数逐时值CLQ，用式:CL=CaCsCiFwDj,maxCLQ，计算逐时值进入玻璃窗日射得热引起的冷负荷。时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0

11、018:0019:0020:00CLQ0.820.790.590.380.240.240.230.210.180.150.110.080.07Dj,max539Cc,sCc,s=Cs*Ci=0.86*0.5=0.43Fw8*0.75=6CL1140.31 1098.59 820.47 528.44 333.75 333.75 319.84 292.03 250.31 208.59 152.97 111.25 97.34 七、南窗日射得热引起的冷负荷表7:南窗日射得热引起的冷负荷由附录19查得双层钢窗有效面积系数Ca=0.75，故窗的有效面积Fw=8*0.75=6。由附录17查得玻璃窗的遮阳系数

12、Cs=0.86；由附录18查得玻璃窗内的遮阳设施的遮阳系数Ci=0.5。于是综合遮挡系数Ccs=CsCi=0.86*0.5=0.43,再由附录16查得上海在纬度30°10'南向日射得热因数最大值为174w/,由附录21查得北区有内遮阳的玻璃窗冷负荷系数逐时值CLQ，用式:CL=CaCsCiFwDj,maxCLQ，计算逐时值进入玻璃窗日射得热引起的冷负荷。时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00CLQ0.26 0.40 0.58 0.72 0.84 0.80 0.62 0.45 0.32

13、0.24 0.16 0.10 0.09 Dj,max174Cc,sCc,s=Cs*Ci=0.86*0.5=0.43Fw24*0.75=18CL350.16 538.70 781.12 969.67 1131.28 1077.41 834.99 606.04 430.96 323.22 215.48 134.68 121.21 八、照明设备冷负荷表8:照明设备冷负荷由于外置荧光灯，散流器装设在空调房间内，取n1=1.2;n2=0.8。根据室内照明开灯的时间为09:0018:00，开灯时间为10个小时，由附录26查得照明散热冷负荷系数。按CL=1000n1n2NCLQ，计算结果列入表格:时间8:0

14、09:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00n11.2 n20.6N20W/m2*（24*15）m2=7.2KWCLQ0.630.90.910.930.930.940.950.950.950.960.960.37CL3265.924665.64717.444821.124821.124872.964924.84924.84924.84976.644976.641918.08九、设备负荷表9:设备形成的冷负荷办公室设备散热量：会议室有数台电脑和2台投影仪。每台发热功率为300w，利用系数为0.8，使用系数为0.8。时间8

15、:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00F360qf16qs5760十人体散热形成的冷负荷表10:人体散热形成的冷负荷会议室属于静坐,由表3-15可得,当室温为26时，成年男子每人散发的显热和潜热量为qs=63W和ql=45W。由表3-14查得群集系数=0.96。根据会议室120人在会议室内的总小时为12小时。由附录27查得人体显热冷负荷系数逐时值,按CLs=nqsCLQ,计算人体显热散热逐时冷负荷.按Qt=ntq1,计算人体潜热散热引起的冷负荷,然后将其计算结果列入表中:时间8:009:0010:0011:0

16、012:0013:0014:0015:0016:0017:0018:0019:0020:00CLQ00.550.640.70.750.790.810.840.860.880.890.910.920.920.920.920.920.920.920.920.920.920.92qs63n1200.96CLs03991.684644.865080.325443.25733.505878.666096.386241.546386.696459.266604.426676.996147.0726147.0726147.0726147.0726147.0726147.0726147.0726147.072

17、6147.0726147.072ql45CLl518451849175.689828.8610264.3210627.210917.5011062.6611280.3811425.5411570.6911643.2611788.4211860.99十一、内维护结构时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00Twp31.3tls2tls33.3tNx26K1.5F90CL985.5各分项逐时冷负荷汇总表表11:各分项逐时冷负荷汇总表由于室内压力略高于室外大气压力，因此不用考虑由室外空气渗透引起的冷负荷。现将上述

18、各分项逐时冷负荷计算结果列入表中，并逐时相加，以便求得会议室内的冷负荷值。时间8:009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:00屋顶冷负荷1909.441726.271574.211491.261491.261558.661726.271961.282244.672547.072849.473134.593352.32东外墙冷负荷1157.431097.161061.491038.121038.121061.491109.461168.501228.771287.801335.781383.751419.421433.

19、57731433.57731433.57731433.57731433.57731433.57731433.57731433.57731433.5773南外墙冷负荷1222.21152.01099.81029.6977.4925.8907.2925.2959.41011.61099.81186.21274.4所有窗传热冷负荷187.16285.64394.0482.64571.28640.24680.08709.16709.16689.48650.08571.28482.64551.3088551.3088551.3088551.3088551.3088551.3088551.3088551.3088551.3088551.3088东窗日射冷负荷1140.311098.59820.47528.44333.75333.75319.84292.03250.31208.59152.97111.2597.34南窗日射冷负荷350.16538.70781.12969.671131.281077.41834.99606.04430.96323.22215.48134.68121.21内维护结构冷负荷985.5985.5985.5985.5985.5985.5985.5985.5985.5985.5985.5985.5985.5照明散热冷负荷3265