01 May Question: 5.2 NRG Energy plans to construct a giant solar plant in Santa Teresa, NM to supply electricity t…
5.2 NRG Energy plans to construct a giant solar plant in Santa Teresa, NM to supply electricity to 30,000 southern NM and western TX homes. The plant will have 390,000 heliostats to concentrate sunlight onto 32 water towers to generate steam NRG will spend $560 million in constructing the plant and $430,000 per year in operating it. If a salvage value of 20% of the initial cost is assumed, how much will the company have to make each year for 15 years in order to recover its investment at a MARR of 18% per year?
5.22 Calculate the infinite-life equivalent annual cost of $5,000,000 in year 0, $2,000,000 in year 10, and $100,000 in years 11 through infinity. The interest rate is 10% per year.
5.19 Estimates have been presented to Holly Farms, which is considering two environmental chambers for a project that will detail laboratory confirma- tions of on-line bacteria tests in chicken meat for of E coli 0157:H7 and Listeriamono- cytogenes. (a) If the project will last for 6 years and 1-10% per year, perform an AW evaluation to determine which chamber is more economical (b) Chamber D103 can be purchased with differ- ent options and, therefore, at different installed costs. They range from $300,000 to $500,000. Will the selection change if one of these other models is installed? (c) Use single-cell spread- sheet functions to solve part (b). the presence Chamber D103 Chamber 490G Installed cost, S -400,000 -250,000 Annual operating cost $ per year Salvage value at 10% of P, $ -4000 -3000 40,000 25,000 Life, years
5.9 A small commercial building contractor pur- chased a used crane 2 years ago for $60,000. Its operating cost was $2500 in month one, $2550 in month two, and amounts increasing by $50 per month through the end of year two (now). If the crane was sold for $48,000 now, what was its equivalent monthly cost at an interest rate of 1% per month?
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