Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Solar or photovoltaic (PV) cells convert sunlight to electricity and are commonly used to power calculators, satellites, remote communication systems, and even pumps. The conversion of light to electricity is called the photoelectric effect. It was first discovered in 1839 by Frenchman Edmond Becquerel, and the first PV module, which consisted of several cells connected to each other, was built in 1954 by Bell Laboratories. The PV modules today have conversion efficiencies of about 12 to 15 percent. Noting that the solar energy incident on a normal surface on earth at noontime is about 1000 W/m2 during a clear day, PV modules on a 1-m2 surface can provide as much as 150 W of electricity. The annual average daily solar energy incident on a horizontal surface in the United States ranges from about 2 to 6 kWh/m2. A PV-powered pump is to be used in Arizona to pump water for wildlife from a depth of 180 m at an average rate of 400 L/day. Assuming a reasonable efficiency for the pumping system, which can be defined as the ratio of the increase in the potential energy of the water to the electrical energy consumed by the pump, and taking the conversion efficiency of the PV cells to be 0.13 to be on the conservative side, determine the size of the PV module that needs to be installed, in m2.
Plot the ground level concentration of sulfur dioxide as a function of distance from the stack and determine the maximum ground level concentration at both with and without air pollution control and the distance from the stack where the maximum co..
what is the probability that less than 0.5 inches of precipitation will occur in any January? What is the probability that more than 2.5 inches wil
Determine the force in each member of the truss and state if it is in tension or compression. Set P=400 lb and d=4 ft.
A refrigerator uses refrigerant-134a as the working fluid and operates on an ideal vapor-compression refrigeration cycle between 0.12 and 0.7 MPa.
determine the highest real root of f(x)= 0.95x^3 - 5.9x^2 +10.9x-6: (a)graphically. (b) using the newton raphson method(three iterations, xi= 3.5). (c) using the secant method(three iterations, xi-1= 2.5 and xi= 3.5).
The discharge from a sugar beet plant causes the DO at the critical point to fall to 4.0 mg/L. The stream has a negligible BOD and the initial deficit after the river and wastewater have mixed is zero.
Data from service records show that the time to repair a certain machine is normally distrubuted with a mean of 65 min and a standard deviation of 5 min. Estimate how often it will take more than 75 min to repair a machine.
Calculate the depth of flow upstream of the bridge assuming that the pier coefficient of drag is 1.2. Drag Force CD Af (V1^2)/2 CD=1.2
Write out the final version of Hooke's Law which includes Young's Modulus. Draw the idealized Stress-Strain diagram for a material. On the drawing, please label: the yield stress, the plastic deformation, and the yield strain.
You are a Project Manager on site where work for 3K.m. long Tunnel has been undertaken. The site is remote and takes about 2 days travel to nearest town. Supervisors, Technicians & Skilled Workers are engaged in dangerous / hazardous work.
A room has a floor area of 500 m^2 and a height of 4 m. THe room is involved in a fire with a constant energy release rate of 1 MW. calculate the time till the smoke layer is 1.5 m from the floor for (a) the case where the leakage areas are at the ..
if the sphere falls at a speed of 150mm/s, what is the mean velocity relative to the cylinder wall of the water in the gap surrounding the midsection of the sphere
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd