Solar Power! Determining the amount of solar energy we can capture.

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Presentation transcript:

Solar Power! Determining the amount of solar energy we can capture

Why do we need solar power? Many areas of the world don’t have access to fossil fuels.

Problems with fossil fuels Burning fossil fuels such as coal releases carbon dioxide and other greenhouse gases. These gases trap more of the sun’s heat in our atmosphere, causing climate change.

Climate change consequences Climate change is responsible for... More frequent flooding More frequent severe stormsRising sea levels

Lack of natural resources Some countries have used up all of their natural resources. Haiti allowed deforestation to provide wood for heat The Dominican Republic did not

Potential dangers of deforestation The loss of forests causes... Erosion Mudslides

Solar energy around the world… Solar Dish Kitchen Solar energy can also cook food Peruvian home with passive solar heating to heat the home and water, using a Trombe wall and solar water heater Trombe wall Solar water heater Solar Oven

Solar energy close to home… Solar Water Heaters heat water for domestic use Photovoltaic Panels – the National Renewable Energy Laboratory in Golden, CO researches efficient electricity production from solar energy Batch Heater Flat Plate CollectorHome Installation

About half of the incoming solar energy reaches Earth  Solar energy is measured as power per unit area (Watt/m 2 ) ~51% reaches Earth’s Surface 100% Incoming Solar Energy 6% Reflected by atmosphere 20% Reflected by clouds 4% Reflected by Earth’s surface 16% Absorbed by atmosphere 3% Absorbed by clouds

The amount of solar energy changes with location… Latitude Longitude Temperature (in Kelvins)

…and time  The location of the sun in the sky changes with the time o day AND the time of year South East West North June 21 December 21

How much solar energy do we have access to?  First we need to know how to setup our flat plate solar module, such as a solar water heater  The solar module should be oriented South at an angle from the horizontal equal to the LATITUDE of solar collection (your location)  Find Location and determine Latitude  We will use N S E W 40.1 o Example: Latitude of Boulder, Colorado is 40.1 o so solar water heater is 40.1 o from the ground facing South

How much solar energy do we have access to?  We need to know:  Location: Latitude  Find this here: v/gmd/grad/solcalc/ Red balloon

How much solar energy do we have access to?  We need to know:  Location: Latitude  Time of year  Time collecting sun per day

How much solar energy do we have access to? Solar Resources

How much solar energy do we have access to? Find your month here and open the map

How much solar energy do we have access to?

 Fill out worksheet to find out how much solar energy we have for our solar modules.