Question

uvelge bill of electrie ell & teet of 2.4m 4) Your professor uses bat detectors that can run off a 6 volt battery and draw 30 mAmps. Battery suppliers specify battery capacity by amp hours (Ah). a) Help your professor to determine the minimum Ah battery rating to operate his detector for a full month assuming that he operates it only 12 hours a day. 12hd & 7ow = 84 hows 0.03 amps *84 hours = 2.54 Ah b) Assume on average that a solar panel (also 6 volt) receives 4 hours of sun a day, and that it has to provide twice the energy to the battery per unit of energy stored (i.e., 50% efficiency). Manufacturers rate solar panels by how many watts they produce in the sun. Help your professor to select a solar panel to keep his battery charged so that he can operate his detector indefinitely. That is, determine the minimum watt rating for this solar panel. Hint: how many watts does the detector require when it operates?

Answer 1

solutions Basic concept is : Energy consumed by bat detector in one day - Energy supplied by solar collector in one day Energy consumed by detector =V It 6x 30 x 12x3600 Joules/day Energy supplied by solar panel - 6* I X 4X 3600xn joules/day 1 =0.5 Equating bothic 3 6*30_xX8 X 3660 = 6 * I *$*3660X0.5! 1000 1 =180 mA » IW Power of solar painel wa 6x 180 = (1.08 watt. 1000