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In this problem you perform an economic analysis on the solar thermal power plant with concentrating Collector(CC) compared to a ''Power tower'' solar thermal power

In this problem you perform an economic analysis on the solar thermal power plant with concentrating Collector(CC) compared to a ''Power tower'' solar thermal power plant(PT). The net power output of the PT plant is 71.727MW

Capital Costs

The capital costs to initially build each system are estimated at $1500 per kilowatt of power output for CC, while capital costs of PT systems are estimated at $1250 per kilowatt of power output. Assume that the CC system produces 80% of the PT power output

Expected lifespan & Replacement costs

The expected lifespans of the CC plant and PT plant are 40 and 30 years respectively. The shorter lifespan of PT is due to it being a newer, untested technology.

The CC plant has no replacement costs, however some components in the power tower of the PT plant must be replaced after 15 years. These replaced components cost 30% of initial capital costs.

Annual operating profits

Energy from the PT plant costs 2.5 US cents per kilowatt-hour of energy output to produce and the CC plant produces energy at a cost of 3.5 US cents per kilowatt hour since it is an older technology. The CC and PT plants operates with availabilities of 50% and 35% respectively, during all years of operation. The availabilties are near 50% to account for plants not producing power at night. Also the PT plant availability is lower since it is a new technology that requires more maintenance time. The energy produced ( electricity) from either power plant cab be sold at 8 US cents per kilowatt hour.

The current interest rate is 6%. The inflation rate is 0%.

Fill in the table below by calculating( for each system)

(a) Capital costs

(b) Replacement costs

(c) Annual profits

Perform an economic analysis to determine whether to invest in a CC or PT plant. Since the two technologies( CC and PT) have different lifespans, is it correct to compare the with a

(d) Present work analysis? OR Annual cost analysis? (circle one)

Based on your answer from part d), complete a present worth OR an annual cost analysis( that includes the capital costs, replacement costs, and annual profits) to find

(e) The present worth or annual cost of the CC

(f) The present worth or annual cost of PT

(G) As an investor, which system would you choose ? CC or PT and why?

(h) What government subsidy per kW-hr of energy produced would need to be given to the less profitable system to make the two systems equally profitable

CC PT Identify each row as a P, F, A, n or i

Existing

Technology

RE Innovation
Capital costs
Life(Years)

Replacement

Costs

Annual

Operating profit

Interest Rate

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