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- If the energy received by 6 m2 area. in 9 minutes is 4290KJ. Calculate the value of Solar constant ?The total rate at which power is used by humans worldwideis approximately 15 TW (terawatts). The solar flux averagedover the sunlit half of Earth is 680 W>m2 (assumingno clouds). The area of Earth’s disc as seen from the Sun is1.28 * 1014 m2. The surface area of Earth is approximately197,000,000 square miles. How much of Earth’s surfacewould we need to cover with solar energy collectors to powerthe planet for use by all humans? Assume that the solar energycollectors can convert only 10% of the available sunlightinto useful power.Estimate the angle made by rays radiation with the normal to a PV cell on 1 Dec at 9:00 am solar time for a location at 28° N and the PV is tiled at angle of lilted at latitude plus 10° with the horizontal and is pointing being to south.
- Calculate the percentage efficiency of a solar PV module whose length is 137 cm and width is 107 cm and produces 190 W maximum power when exposed to 1068 W/m2 solar irradiance?Assume the intensity of solar radiation incident on the cloud tops of the Earth is 1 677 W/m². (a) Taking the average Earth-Sun separation to be 1.496 x 10¹1 m, calculate the total power radiated by the Sun. 4.905E26 x Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. W (b) Determine the maximum value of the electric field in the sunlight at the Earth's location. kv/m (c) Determine the maximum value of the magnetic field in the sunlight at the Earth's location. μT(W/m), in Santa solar radiation into energy- solar radiation (w/m?) 400 300 200 100 time (hrs past midnight) 4 8 12 16 20 ot dengndi lo
- Imagine choosing between two winter jackets. Assume you have access to a heat-generating mannequin with variable heat output. Insulation is comparable to (TB – TA)/M in the chapter 10 calculation. (This is a generic insulating equation.) How would you quantify the two jackets' insulation?A lightbulb works with a filament of 100 µm diameter and 30 cmlength of tungsten. You apply a voltage of 12 V. Compute theemitted total power assuming that convection can be neglected. Whatis the resulting filament temperature if the emissivity was 0.7?second Of A black body radiates heat energy at the rate of 1.0x105 joule per per meters at the temperature of 127 °C. Calculate temperature of the black body the rate of heat radiation at which is 16.0 X 105 foule per second per meter 2
- When going lrom fat toO muscie tiSSUC, 3. (a) Find energy that the light-skinned person (e = 0.6) with a skin area of A =1.7m2 receives from solar radiation incident at angle 0 = 60°. (b) Find energy that the dark-skinned person (e = 0.8) with a skin area of A =1.7m2 receives from solar radiation incident at angle 0 = 60 %3D %3D %3DApril May Tmos sbien 3 2022 during I hr the bobal amount of energy & radiated by the sun is 1.348 × 10 30 j. Given that the power radiated by the sun, Pgun is equal to the name of ab which energy is radiated by the Sun, wribe down the relationship between the bobal energy Egun radiated during about alamet, Psun. Use in 1 and the rachabed perver your answer to 3 Significant figures. Urubs are important so bate particular Care bo use umbs consisbanbly throughout2.A solar collector with an area of 1.5 m2 is installed on the rooftop of a house. Assume that the radiative encrgy amiving from the sun is 1000 Wm. The collector reflecis 10% of the enengy arriving on is surfice. Also, the collector is not perfectly insulated, and losses occur The collector has a heat transfer coefficient h of 2 Wmx The side arcas of the collector are assumed to be negligible. The ambient temperature is 20 °C and the collector is assumed to be at a temperature of 50 "c. Consider that this temperature is constant throughout the whole collector The collector is assumed to behave like a black body. a) What is the power output of the collector? b) What percentage of the total losses is caused by radiation?