A solar-thermal-electric power plant collects energy from sunlight focused on a high-temperature collector where solar energy is absorbed by molten material at the rate shown on the graph below. To allow overnight operation, energy is stored in an insulated tank holding a reserve supply of molten material at the melting temperature. As energy is removed the material solidifies. The reserve tank can provide enough stored energy (at 300 kJ per kg of material) to operate the plant for 24 hours with no solar input. The thermal efficiency of the power plant is 30%. The electrical power output is constant (24 hr/day, every day). Given: material density = 2400 kg/m3
Complete a standard schematic diagram of the power cycle: clearly label all terms and show the numeric values. Find the constant power output and volume of the reserve tank?