How to calculate solar power needed
[DOCX File]Copy of Concentrating Solar Power Lab UCSC.docx
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The intensity of solar radiation at the top of the Earth’s atmosphere is 1 370 W/m2. Assuming 60% of the incoming solar energy reaches the Earth’s surface and you absorb 50% of the incident energy, make an order-of-magnitude estimate of the amount of solar energy you absorb if you sunbathe for 60 minutes.
[DOC File]Experiment 1: Relation Between Power and Energy
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Solar power meter (1 per class) Ruler. Stirling engine. Procedure: Part I: Determining energy efficiency by warming up a cup of water. Use the solar power meter determine the solar power density at your location. Point the solar power meter at the sun and record displayed value in W/m2. Use “W/B” to switch between between W/m2 and Btu/(ft2h).
[DOC File]Can You Hear Me Now
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The power in sunlight, Is, at sea level, at noon is about 1,000 W/m^2. So calculate the solar power into your solar cell Ps = Is *A = 1,000 * 0.0025 = 2.5 W. The efficiency is P/ Ps which if the maximum possible power produced by the solar cell were 0.4 W would be 0.4/2.5 = 16%. What’s Going On?
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Calculate the amount of power that would be produced by the solar module if it could simultaneously produce the voltage and current you measured in the previous two steps. For this illumination level, the solar module will deliver, at most, about 70% of this theoretical maximum, and will do so at a resistance between zero and infinite resistance.
[DOCX File]Part IV: Measuring Voltage, Current, and Power under load
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The solar constant, Is, is the power arriving per meter squared at the surface of the earth from the sun it is Is = 1,000 watt/m2. (You can measure the solar constant yourself using this activity: Solar Brightness Measurement.) To calculate the solar power arriving at the solar cell we need to multiply the solar constant by the area of the cell.
[DOC File]Electric Power from the Wind and Sun
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The electrical power output of the solar cell in watts can be calculated by recalling that an area A1 supplied 0.02 watts (the power needed to just start the motor) -- see step 3. Therefore the power produced by the full 16 cm2 of the cell can be found from: p = 0.32/A1.
[DOCX File]Activity 1.3.1 Solar Hydrogen System – VEX
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Application: Devices are designed to consume power at a particular voltage. Cells must be connected in series and parallel combinations to provide power (P=IV) at the required voltage. The miniature bulb requires at least 1V to light properly, so there is a need to connect cells in series to obtain the voltage needed for the light bulb to light.
[DOC File]Can You Hear Me Now
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Calculate the average amount of solar energy incident on the PV array each day. 50 m2 x 5.0 kWh/m2/day = 250 kWh/day. The efficiency of the PV system equals 10% (i.e. 10% of the solar energy incident on the array is transformed into useful electric power). Calculate the daily average electric energy produced by this system.
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