2/11/13: Last worksheet to check for understanding on the Sun's Path and Shadow...
(1st Period: Finish lab)
2/12/13: Intro Seasons and Insolation (worksheet 1 of 2) http://solarinsolation.org/
Solar insolation, what is it?
Solar insolation is a measure of solar radiation energy received on a given surface area in a given time. It is commonly expressed as average irradiance in watts per square meter (W/m2) or kilowatt-hours per square meter per day (kW•h/(m2•day)) (or hours/day). In the case of photovoltaics it is commonly measured as kWh/(kWp•y) (kilowatt hours per year per kilowatt peak rating).
The object or surface that solar radiation strikes may be a planet, a terrestrial object inside the atmosphere of a planet, or any object exposed to solar rays outside of an atmosphere, includingspacecraft. Some of the solar radiation will be absorbed, while the remainder will be reflected. Usually the absorbed solar radiation is converted to thermal energy, causing an increasing in the object’s temperature. Some systems, however, may store or convert a portion of the solar energy into another form of energy, as in the case of photovoltaics or plants.
The amount of insolation received at the surface of the Earth is controlled by the angle of the sun, the state of the atmosphere, altitude, and geographic location.
The insolation into a surface is largest when the surface directly faces the Sun. As the angle increases between the direction at a right angle to the surface and the direction of the rays of sunlight, the insolation is reduced in proportion to the cosine of the angle.
This ‘projection effect’ is the main reason why the polar regions are much colder than equatorial regions on Earth. On an annual average the poles receive less insolation than does the equator, because at the poles the Earth’s surface are angled away from the Sun.
2/13/13: Finish Solar Insolation worksheet 2 ( Extra Credit #1 June 2009 ES Regents due)
Notice its hotter at the equator....
2/14/13: Review for the Test (8th Period - Test!)
the Sun changes its position in the sky over the course of a year.
Solar Radiation and the Seasons - Download as PowerPoint
2/15/13: Test (1st period only) 7th period Regent Practice....
Mid- Marking Period: How are you doing so far?
1 Test
1 Lab
4 HW
7 Worksheets
What did you learn? will you still remember by June Regent?
This week's extra credit is: June 2010 ES Regent Due next week Wed.
(1st Period: Finish lab)
2/12/13: Intro Seasons and Insolation (worksheet 1 of 2) http://solarinsolation.org/
The langley (Ly) is a unit of energy distribution over area. It is used to measure solar radiation (or insolation). The unit was named after Samuel Pierpont Langley (1834-1906) in 1947.
Solar insolation, what is it?
Solar insolation is a measure of solar radiation energy received on a given surface area in a given time. It is commonly expressed as average irradiance in watts per square meter (W/m2) or kilowatt-hours per square meter per day (kW•h/(m2•day)) (or hours/day). In the case of photovoltaics it is commonly measured as kWh/(kWp•y) (kilowatt hours per year per kilowatt peak rating).
The object or surface that solar radiation strikes may be a planet, a terrestrial object inside the atmosphere of a planet, or any object exposed to solar rays outside of an atmosphere, includingspacecraft. Some of the solar radiation will be absorbed, while the remainder will be reflected. Usually the absorbed solar radiation is converted to thermal energy, causing an increasing in the object’s temperature. Some systems, however, may store or convert a portion of the solar energy into another form of energy, as in the case of photovoltaics or plants.
The amount of insolation received at the surface of the Earth is controlled by the angle of the sun, the state of the atmosphere, altitude, and geographic location.
The insolation into a surface is largest when the surface directly faces the Sun. As the angle increases between the direction at a right angle to the surface and the direction of the rays of sunlight, the insolation is reduced in proportion to the cosine of the angle.
This ‘projection effect’ is the main reason why the polar regions are much colder than equatorial regions on Earth. On an annual average the poles receive less insolation than does the equator, because at the poles the Earth’s surface are angled away from the Sun.
2/13/13: Finish Solar Insolation worksheet 2 ( Extra Credit #1 June 2009 ES Regents due)
Figure 6i-1: Effect of angle on the area that intercepts an incoming beam of radiation.
Notice its hotter at the equator....
2/14/13: Review for the Test (8th Period - Test!)
the Sun changes its position in the sky over the course of a year.
Solar Radiation and the Seasons - Download as PowerPoint
2/15/13: Test (1st period only) 7th period Regent Practice....
Mid- Marking Period: How are you doing so far?
1 Test
1 Lab
4 HW
7 Worksheets
What did you learn? will you still remember by June Regent?
This week's extra credit is: June 2010 ES Regent Due next week Wed.
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