A gas turbine power plant operates on the simple Brayton cycle with air as the working fluid and delivers 15 MW of power. The minimum and maximum temperatures in the cycle are 300 K and 1100 K, and the pressure of air at the compressor exit is 9 times the value at the compressor inlet Assume an adiabatic efficiency of 80% for the compressor and 90% for the turbine. Use the PG model.
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- A manager must decide between two machines. The manager will take into account each machine's operating costs and initial costs, and its breakdown and repair times. Machine A has a projected average operating time of 131 hours and a projected average repair time of 4 hours. Projected times for machine B are an average operating time of 61 hours and a repair time of 5 hours. What are the projected availabilities of each machine? (Round your answers to 3 decimal places.) Answer is complete but not entirely correct. Availability 0.952 0.945 Machine A Machine BWrite a linear cost function equation for each of the following conditions. Use y for estimated costsand X for activity of the cost driver. Machine operating costs include $1,000 of maintenance per month, and $15.00 of coolant usagecosts for each day the machinery is in operation.A consulting engineer is considering two pumps to meet a demand of 15,000 gallons/minute at 12 feet total dynamic head. The specific gravity of the liquid being pumped is 1.50. Pump A operates at 70% efficiency and costs $12,000; pump B operates at 75% efficiency and costs $18,000. Power costs $0.015/kilowatt-hour. Continuous pumping for 365 days/year is required (i.e., 24 hours/day). Using a MARR of 10% and assuming equalsalvage values for both pumps, how many years of service are required forpump B to be justified economically? (Note: Dynamic head times gallon/ minute times specific gravity divided by 3960 equals horsepower required. Horsepower times 0.746 equals kilowatts required.)
- A design engineer must select the horsepower for a motor to drive a pump. Horsepower rating is a continuous design parameter with values in the range of 10 to 40 horsepower. The motor will have an annual ownership cost of $120 plus $0.60 per horsepower. The operating costs of such motors for 1 horsepower-hour will be $0.055 divided by the horsepower rating. Nine thousand horsepower-hours will be needed per year. Solve, a. Determine what horsepower should be specified for a minimum total annual cost. b. Show that you have minimized total cost per year.Suppose that the total cost of manufacturing x units of a metal straws is C(x) = 2x² + 6x + 12. Using the linear approximation p(x) of C(x) about x = 20, approximate the cost of manufacturing 21 units of metal straws. Compare this with the exact cost of manufacturing 21 units of metal straws. Using the same p(x) about x = 20, approximate the cost of manufacturing 22 units of metal straws and compare this with the exact cost. What do you observe about approximations p(21) and p(22) relative to C(21) and C(22), respectively?You need to find out the maximum NPV of a hypothetical iron ore open pit as shown below. The iron ore grade is 72% and recovery is 90%. The market price of iron ore is $100/ton. The ore and waste block size are 30 by 30 by 30 m3 and annul production of six blocks (mining + stripping) is there. The mining cost is $35/ton and the stripping cost is $25/ton. The density for the ore and waste is 4.5 ton/m3 and 2.5 ton/m3 respectively. Assuming initial investment $50 million the interest rate is 5% per year. W = waste; O = ore
- A machine is used to produce two interchangeable products. The daily capacity of the machine can produce at most 20 units of Product 1 and 10 units of Product 2. Alternatively, the machine can be adjusted to produce at most 12 units of Product 1 and 25 units of Product 2 daily. Market analysis shows the maximum daily demand for the two products combined is 35 units. Given that the unit profits for the two respective products are $10 and $12, formulate the Integer Linear Programming model to maximize the Total Profit.SanaMolp management reports that its average delivery cycle time is 20.0 days; its average throughput time is 7.5 days; its manufacturing cycle efficiency is 0.32; its average move time is 0.2 day; and its average queue time is 4.0 days: a. What is the wait time? b. What is the process time? c. What is the inspection time? Answer with solution plsIf the air-conditioning system for a 200,000 ft2 building is estimated to be 400 ft2 per ton and to cost $4000 per ton, then what will be the system cost? And If, through load management, the system capacity for the building in above problem is reduced by 10%, will the system cost be reduced by 10%? If not, why?
- Patagania Company reports that its average delivery cycle time is 20.0 days; its average throughput time is 7.5 days; its manufacturing cycle efficiency is 0.32; its average move time is 0.2 day; and its average queue time is 4.0 days: a. What is the wait time? b. What is the process time? c. What is the inspection time? Answer with complete set solution plsA mechanical engineer is considering two types of pressure sensors for the low-pressure steam lines in several of the company plants. Piezoresistive sensors use the change in conductivity of semiconductors to measure the pressure. Fiber optic sensors use the properties of fiber optic interferometers to sense nanometer scale displacement of membranes. The costs for each system are shown below. Which should be selected based on a present worth comparison at an interest rate of 1% per month?Assume that the operations manager of a small semi-conductor manufacturer wants to run a Simulation model to better understand the uncertainties related to cost and demand for a particular product. He assumes that the total cost per month could be anywhere between $150,000 and $200,000 with equal likelihood. He also assumes that the demand is normally distributed with a mean of 5,000 items per month and a standard deviation of 1,000. Each item is sold for $95. a) Use the random numbers in the following table to simulate the costs, revenues and profits per month. Use Random Number A to generate the costs and Random Number B to generate the revenues per month and then calculate the profit as the difference between revenues and costs. Complete the table by reporting the minimum, maximum and average profit per month according to this simulation. Trial 1 2 3 4 5 6 7 8 9 10 you b) Can Random A 0.23 you 0.04 0.14 0.07 0.03 0.67 0.26 0.03 0.83 0.32 Cost Random B 0.75 0.89 0.82 0.33 0.96 0.67…