| 查看: 826 | 回复: 2 | ||||
老花木虫 (著名写手)
老花
|
[求助]
照射到地面的太阳光能量的占比 已有2人参与
|
|
请问，照射到地面的太阳光中，可见光能量占比多少？红外线能量占比多少？紫外线占比多少？其他占比多少？ 和地域有关系吗？什么因素对占比影响比较大？ |
回复此楼» 猜你喜欢
依托企业入选了国家启明计划青年人才。有无高校可以引进的。
已经有9人回复
-
有时候真觉得大城市人没有县城人甚至个体户幸福
已经有11人回复
-
表哥与省会女结婚，父母去帮带孩子被省会女气回家生重病了
已经有7人回复
-
同年申请2项不同项目，第1个项目里不写第2个项目的信息，可以吗
已经有8人回复
-
依托企业入选了国家启明计划青年人才。有无高校可以引进的。
已经有10人回复
-
天津大学招2026.09的博士生，欢迎大家推荐交流（博导是本人）
已经有9人回复
-
有院领导为了换新车，用横向课题经费买了俩车
已经有10人回复
-
AI 太可怕了，写基金时，提出想法，直接生成的文字比自己想得深远，还有科学性
已经有6人回复
--八云--
专家顾问 (知名作家)
博览众家之长，终集百家之短
-
专家经验: +143 - 物理EPI: 1
- 应助: 216 (大学生)
- 金币: 4097.5
- 散金: 1408
- 红花: 70
- 帖子: 9216
- 在线: 1033.8小时
- 虫号: 1368331
- 注册: 2011-08-14
- 性别: GG
- 专业: 凝聚态物性 II ：电子结构
- 管辖: 物理
【答案】应助回帖
|
Reference Solar Spectral Irradiance: Air Mass 1.5 http://rredc.nrel.gov/solar/spectra/am1.5/ |
2楼2017-12-04 21:11:19
rlafite
木虫 (正式写手)
- 应助: 187 (高中生)
- 金币: 9717.6
- 红花: 28
- 沙发: 1
- 帖子: 868
- 在线: 335.5小时
- 虫号: 4563202
- 注册: 2016-04-02
- 性别: GG
- 专业: 同步辐射技术及其应用
【答案】应助回帖
|
The total amount of energy received at ground level from the Sun at the zenith depends on the distance to the Sun and thus on the time of year. It is about 3.3% higher than average in January and 3.3% lower in July (see below). If the extraterrestrial solar radiation is 1367 watts per square meter (the value when the Earth–Sun distance is 1 astronomical unit), then the direct sunlight at Earth's surface when the Sun is at the zenith is about 1050 W/m2, but the total amount (direct and indirect from the atmosphere) hitting the ground is around 1120 W/m2.[5] In terms of energy, sunlight at Earth's surface is around 52 to 55 percent infrared (above 700 nm), 42 to 43 percent visible (400 to 700 nm), and 3 to 5 percent ultraviolet (below 400 nm).[6] At the top of the atmosphere, sunlight is about 30% more intense, having about 8% ultraviolet (UV),[7] with most of the extra UV consisting of biologically damaging short-wave ultraviolet.[8] Direct sunlight has a luminous efficacy of about 93 lumens per watt of radiant flux. This is higher than the efficacy (of source) of most artificial lighting (including fluorescent), which means using sunlight for illumination heats up a room less than using most forms of artificial lighting. |
3楼2017-12-06 04:04:12