散热管 地面材料 | 陶瓷 | 塑料 | 木地板 |
聚乙烯(PE-RT) | 136.6W/m2 | 103.5W/m2 | 93.5W/m2 |
聚丁烯(PB) | 125.7W/m2 | 96.9W/m2 | 90.0W/m2 |
(2)某家庭木地板的面积为,散热管材料为聚丁烯(PB),供水温度为 ,则该供暖系统每小时的散热量为多少焦耳?
(3)电地暖是以发热电缆为热源加热地板,比水地暖更舒适、节能。明明家安装了电热暖,安装面积为 ,已知采暖每平米瓦数140W,其他用电器用电高峰总功率约为 3kW,他家电能表如图所示,问:明明家是否需要向电力部门申请增容?
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2