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You need to prepare report on Third generation solar cells.
Solar cells are key to provide clean, reliable energy. However, future generations of high efficiency solar cells require cheaper production. Organic thin film solar cells are much cheaper.
Buffer layers need to be developed to resist the high temperatures required to deposit the thin film onto a substrate.
To solve efficiency problems, the project is to solve the optical generation rate for different cell structures eg. cells textured with upright pyramids, covered with various anti-reflection coatings, and having different thicknesses and different metal and dielectric layers on the rear side. Plasmonic nanoparticles can improve its efficiency too.
Assume a piecewise linear model for the diode has a cut-in voltage of 0.7V and a forward resistance , rf, of zero. Determine the ripple voltage, Vr, for each of the following capacitors : 1μF, 10μF,100μF for a following a half wave rectifier.
Steel surfaces can be hardened by carburization. During one such treatment at 1000°C, there is a drop in carbon concentration from 5 to 4 at% carbon between 1 and 2 mm from the surface of the steel. Estimate the flux of carbon atoms into the steel
Assume that the 1100-kV line of Problems 5.8 and 5.19 is 400 km long and that the subconductor's resistance is 0.0435 ohms/km.
The field current of a 200kW, 230V shunt generator is 8A. When running full load at rated voltage. If the combined brush contact and armature resistance is 0.03 ohms. Determine the power generated and the electrical efficiency.
Why should the motor be run for a period of time following checkout?
a new type of battery deleivers 10 watt of powr for 8 hours without voltage or current fluctuation. after 8 hours, however thepower output drops linearly from 10 watt to 0 in only 5minutes. (a). what is energy storage capacity of the battery
The position of a particle is given by r =3.0tf +2.0t2]+ 5.0k , where t is in seconds and the coefficients have the proper units for r( t) to be in meters.
Discuss how p and q can be estimated emperically from a histogram of (simulated) burst length and inter-error gap distributions. Estimate p and q.
If the starting current is to be restricted to 290 A, calculate the external resistance to be added in the motor circuit and the starting torque.
A cylindricalsteelrod 50 cm long with a circu.lar cross section, that wrn conduct 150 J/s from a furnace at 400 °C to a container of boiling water under 1 atmosphere. Find the diameter of rod
What is a disadvantage to direct venting an oil-fired furnace?
The strength of longitudinal joint in Fig. 1-17 is 33 kips/ft, whereas for the girth is 16 kips/ft. Calculate the maximum diameter of the cylinder tank if the internal pressure is 150 psi.
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