建筑物理2热工学大作业

班级建筑141

姓名钟诚

学号********** 指导老师Tony

建筑物理2热工学大作业

1.查资料得:宁波市冬季日平均气温在5℃~13℃之间，则取室外温度为t1=7℃，室内适宜温度取为t2=22℃，室内外温差15℃.

2.建筑维护结构材料的选取

①墙体：墙体分外墙、保温层和内墙外墙（d1=240mm)和内墙(d2=140mm)材料

为灰砂石砌体，λ=1.10；保温层材料(d3=60mm)为矿棉板，λ=0.050

②屋顶：钢筋混凝土（d1=30mm）λ=1.74；保温砂浆(d2=20mm)λ=0.29；油毡

防水层(d3=10mm)λ=0.17

③楼地面：钢筋混凝土(d=150mm)λ=1.74

④门：胶合板(d=50mm)λ=0.17

⑤窗：单层玻璃材料取平板玻璃(d=5mm)λ=0.76 窗框窗洞面积比25%

3.传热阻计算

①墙体：R1=0.24/1.10=0.218(㎡·K/W)

R2=0.14/1.10=0.127(㎡·K/W)

R3=0.06/0.05=1.2(㎡·K/W)

R(wall)=Ri+R1+R2+R3+Re=0.11+0.218+0.127+1.2+0.04=1.695(㎡·K/W)

②屋顶：R1=0.03/1.74=0.017(㎡·K/W)

R2=0.02/0.29=0.069(㎡·K/W)

R3=0.01/0.17=0.059(㎡·K/W)

R(roof)=Ri+R1+R2+R3+Re=0.11+0.017+0.069+0.059+0.04=0.295(㎡·K/ W)

③楼地面: R1=0.150/1.74=0.086(㎡·K/W)

R(floor)=Ri+R1+Re=0.11+0.086+0.08=0.276(㎡·K/W)

④门: R1=0.05/0.17=0.294(㎡·K/W)

R(door)=Ri+R1+Re=0.11+0.294+0.04=0.444(㎡·K/W)

⑤窗：R1=0.005/0 .76=0.0066(㎡·K/W)

R(window)=Ri+R1+Re=0.11+0.0066+0.04=0.1566(㎡·K/W)

4.面积计算long=

5.6m wide=3.31m high=3.05m+0.2m=3.25m （假设室内比室外高0.2m)

①墙体：A1(west wall)=5.6x3.25=18.2㎡

A2(north wall)=2.01x3.25+0.7x3.25=8.8㎡

A3(east wall)=4.3x3.25+1.3x3.25-0.87x2.07=16.4㎡

A4(south wall)=3.31x3.25-2.38x1.45=5.35㎡

A(wall)=18.2+8.8+16.4+5.35=48.75㎡

②楼板: A(roof)=5.6x3.31-0.7x1.3=17.626㎡

③楼地面:A(floor)=5.6x3.31-0.7x1.3=17.626㎡

④前门:A(door)=0.87x2.07=1.8009㎡

⑤铝合门窗:A(window)=2.38x1.45=3.451㎡

5.计算传热系数

①墙体: K(wall)=1/1.695=0.59W/(㎡·K)

②屋顶: K(roof)=1/0.295=3.39W/(㎡·K)

③楼地面: K(floor)=1/0.276=3.62W/(㎡·K)

④门: K(door)=1/0.444=2.25W/(㎡·K)

⑤窗：K(window)=1/0.1566=6.39W/(㎡·K)

6.计算热损系数

①HLC(wall)=48.75x0.59=28.77W/K)

②HLC(roof)=17.626x3.39=59.75(W/K)

③HLC(floor)=17.626x3.62=59.75(W/K)

④HLC(door)=1.8009x2.25=4.052(W/K)

⑤HLC(window)=3.451x6.39=20.05W/K)

⑥THLC=28.77+59.75+59.75+4.052+20.05=172.372(W/K)

7.维护结构热损失

Qt=15x173.372=2585.58W

8.全年能源需求

Energy=2585.58x365x24x60=1358980848(kWh)

9.主卧计算

Θi=ti-Ri(ti-te)/Ro=22-0.11x15/1.695=21.23℃

Θm140mm砌体=22-(0.11+0.127)x15/1.695=19.91℃

Θm保温层=22-(0.11+0.127+1.2)x15/1.695=9.28℃

Θm240mm砌=22-(0.11+0.127+1.2+0.127)x15/1.695=8.16℃

Θe=22-(0.11+0.127+1.2+0.127+0.04)x15/1.695=7.81℃10.参考资料

Re,Ri 选择参考上表（来源于民用热工设计规范）

窗户选择最简单的单层窗，窗洞比取25%（来源于民用热工设计规范）