Question

EERİNG MILLIGAN Greg Harrell, Ph.D., P.E Director of Engineering Programs Emmanuel Building 1 Walker Drive Johnson City, Tennessee 37601 Telephone: 865-719-0173 Email: GSHarrell@milligan.edu ENGINEERING Problem-03-Electrical Circuit-35 points The schematic below represents a battery powered circuit that contains a 12 Voo battery supply and two identical incandescent lightbulbs that are arranged in a series circuit. Dc 4 The lightbulbs are represented as Resistor 1 and 2, Each lightbulb has a maximum rating of 15 W The battery rating is 100 Ah The switch is closed and the steady-state electrical current is measured to be 1.OA It has been decided that the light from only one lightbulb is needed. The plan is to remove one lightbulb and its holder and simply connect the circuit with a single lightbulb. Using a pencil-and-paper solution path determine the following. 1) For the 2 Lightbulb Circuit a. The Power Dissipated by the circuit in operation [W] b. The Resistance of the Circuit [Q] c. The total Rated Energy Storage Capacity of the battery [Wh] d. The amount of Time the battery can support this load hr] 2) For the proposed 1 Lightbulb Circuit assume the system can function as planned-determine a. The amount of Time the battery can support this load [hr b. Identify any Points-of-Concern Problem-04-Solar System- 10 points Assume a fair model of solar incidence onto a specific solar panel is 46.5 W/m2 for 8 hours each day-the remainder of the time each day zero solar energy falls on the panel. Assume the efficiency of the solar panel is 15%. This system is composed of 10 solar panels and a very large capacity storage battery. The DC power system operates at 24 Voc. Each solar panel is 3 ft wide and 6 ft long, Determine the maximum continuous Alternating Current power output expected from this solar power system MILLIGAN ENGINEERING Page 2 of3

Number 4

Answer 1

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