KA Solar Cell lab

.xlsx

School

Ohio State University *

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Course

1113

Subject

Electrical Engineering

Date

Dec 6, 2023

Type

xlsx

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Uploaded by SuperHumanBoulderFalcon35

Switch # Resistance Voltage Power ( ohms) (V) (W) 5 3 0.203 0.013736333 6 5 0.336 0.0225792 7 10 0.651 0.0423801 8 15 0.975 0.063375 9 20 1.305 0.08515125 Incident Lt. Intensity = I= 5N W/m^2 R = 20 ohms "Sky Binary Decimal Cell Volt. V^2/R=Cell Cell area Power Efficiency Condition" Light Meter Convert from Light Int. Output Power Output A per m^2 binary (W/m^2) (V) (W) (m^2) (W/m^2) (%) Cloudy 11010 26 130 0.63 0.019845 0.003 6.615 5.08846154 Bright 10001000 136 680 2.06 0.21218 0.003 70.7266666667 10.4009804 R = 20 Ohms Experiment Theoretical Experiment Theoretical Inclination Voltage Power b = theor. Power/area Power/area Angle (deg) (V) (W) (W) (W/m^2) (W/m^2) 0 1.92 0.18432 0.18432 61.44 61.44 15 1.86 0.17298 0.167085849 57.66 55.69528314 30 1.82 0.16562 0.143431127 55.20667 47.81037579 45 1.62 0.13122 0.092786552 43.74 30.92885061 I = Incident Solar Cell Lab Task 1 : Table 1.1 Power can be calculated by P= V^2/R. In Task 1, find the resistor that gives the greatest power output in Task 1 and use that resistor in the remaining tasks in the lab. Lamp height is 7 in above solar cell surface. Task 2: Table 2.1 Cloudy is 19 in lamp height. Bright is 7 in lamp height. Task 3: Table 3.1 b = P(Cos φ) See Lab instructions. P is the Power at φ= 0 so b = P at angle the φ= 0 because Cos(0) =1. Remember Excel requires radians for Cosine. Lamp Height is 7 inches. See sheet 2 for Task 4 Binary readings should be about 1100 XXXX or greater for bright sky conditions. Binary readings for cloudy sky should be about 0011 XXXX. Task 4 and questions are on page 2. e I A = P solar cell e = output/input %e = 100* e % Efficiency = (Electrical Cell Power Output / (IA) )* 100

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R = 20 Cell B Cell B Cell B Cell B Cell A Inclination Voltage Resistance Power area of B Power/area Power/area Angle (V) (Ohms) (W) (m^2) (W/m^2) (W/m^2) 0 1.98 20 0.19602 0.004389 44.66165 61.44 15 1.95 20 0.190125 0.00439 43.30866 57.66 30 1.91 20 0.182405 0.00439 41.55011 55.20667 45 1.81 20 0.163805 0.00439 37.31321 43.74 Task 4: Table 4.1 Resistance is the same as in Tasks 2&3. Copy the experimental data from Task 3 experimental power/area measuremen on Task 3 in light yellow) DISCUSSION QUESTIONS: 1. Suppose a house in Ohio requires 70.0 kilowatt-hours per day. Assume 8.0 hours of sunlight at 11% efficiency and a light intensity of 1150 W/m 2 (roughly the average for planet earth on a sunny day), what is the minimum area of th needed for this house? (1150 W/m^2)*(0.11)*(8*3600)*(A) = 70 * 1000 * 3600 = 69.17 m^2 2) Calculate how large the solar cells would be to supply a house on a cloudy day. a) How large would the solar cells for the house in question#1 be for this house for a wintery day with 6.0 hours of sunligh intensity of 600 W/m 2 ? Assume the efficiency is 8.5% (600W/m^2)*(0.085)*(6*3600)*(A) = 70 *1000*3600 = 228.76 m^2 3) From Task 2 in the lab, how did the efficiencies of solar cell A vary between the bright sky conditions and the clo conditions? The efficiency of the solar cell for the conditions "cloudy sky" are lower than "bright sky". 4) From the data in task 3 plot a graph of power output of solar cell A vs. angle. Include on the same graph the th of b vs. angle. How does solar cell A compare to the theoretical value? (Discuss if it was better or worse than the th expected.) The solar cell "A" and theoretical value were both decreasing for a larger angles, although the theoretical value w at a higher rate. Solar cell "A" was a better and higher value of power than the theoretical value. 5) From the data in Task 4, compare solar cell A to solar cell B when the angle of incidence of light was changed. Plot power output per area for cell A and cell B vs. incident angle. Discuss the results as well as show the graph. The overall area of solar cell "A" is smaller than the solar cell "B''s area, making the power per area of solar cell " the power per area of solar cell "B". Solar Cell A was a flat solar cell. Solar shaped surface. Investigate if these ce differently with changes in angle.

69.16996 228.7582 Lamp Height 7 inches 3 in this column for the nts. (2nd column from right he solar cell ht and a sunlight oudy sky heoretical value heoretical value was decreasing "A" larger than r Cell B has a bubbled ells performed 0 5 10 15 20 25 30 35 40 45 50 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2 Power vs Angle Power output Theoritical Angle (Degrees) Power (Watts) 0 5 10 15 20 25 30 35 40 45 50 0 10 20 30 40 50 60 70 Power Output Per Area: Cell A vs. Cell B Power/Area of Cell B Power/Area of Cell A Angle (Degrees) Power output per area (W/m^2)

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