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You have been asked to evaluate the economic implications of various methods for cooling condenser effluents from a 200-MW steamelectric plant. There are two basic types of cooling towers: wet and dry. Furthermore, heat may be removed from condenser water by (1) forcing (mechanically) air through the tower or (2) allowing heat transfer to occur by making use of natural draft. Consequently, there are four basic cooling tower designs that could be considered. Assuming that the cost of capital to the utility company is 10% per year, your job is to recommend the best alternative (i.e., the least expensive during the service life). Further, assume that each alternative is capable of satisfactorily removing waste heat from the condensers of a 200-MW power plant. What noneconomic factors can you identify that might also play a role in the decision-making process?

You have been asked to evaluate the economic implications of various methods for cooling condenser effluents from a 200-MW steamelectric plant. There are two basic types of cooling towers: wet and dry. Furthermore, heat may be removed from condenser water by (1) forcing (mechanically) air through the tower or (2) allowing heat transfer to occur by making use of natural draft. Consequently, there are four basic cooling tower designs that could be considered. Assuming that the cost of capital to the utility company is 10% per year, your job is to recommend the best alternative (i.e., the least expensive during the service life). Further, assume that each alternative is capable of satisfactorily removing waste heat from the condensers of a 200-MW power plant. What noneconomic factors can you identify that might also play a role in the decision-making process?

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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You have been asked to evaluate the economic implications of various methods for cooling condenser effluents from a 200-MW steamelectric plant. There are two basic types of cooling towers: wet and dry. Furthermore, heat may be removed from condenser water by (1) forcing (mechanically) air through the tower or (2) allowing heat transfer to occur by making use of natural draft. Consequently, there are four basic cooling tower designs that could be considered. Assuming that the cost of capital to the utility company is 10% per year, your job is to recommend the best alternative (i.e., the least expensive during the service life). Further, assume that each alternative is capable of satisfactorily removing waste heat from the condensers of a 200-MW power plant. What noneconomic factors can you identify that might also play a role in the decision-making process? Click the icon to view the alternatives description. Click the icon to view the interest and annuity table for discrete compounding when i = 10% per year. The AW of Wet Tower, Mechanical Draft is $ The AW of Wet Tower, Natural Draft is $ The AW of Dry Tower, Mechanical Draft is $ The AW of Dry Tower, Natural Draft is $ (Round to the nearest dollar.) (Round to the nearest dollar.) . (Round to the nearest dollar.) . (Round to the nearest dollar.)
Transcribed Image Text:You have been asked to evaluate the economic implications of various methods for cooling condenser effluents from a 200-MW steamelectric plant. There are two basic types of cooling towers: wet and dry. Furthermore, heat may be removed from condenser water by (1) forcing (mechanically) air through the tower or (2) allowing heat transfer to occur by making use of natural draft. Consequently, there are four basic cooling tower designs that could be considered. Assuming that the cost of capital to the utility company is 10% per year, your job is to recommend the best alternative (i.e., the least expensive during the service life). Further, assume that each alternative is capable of satisfactorily removing waste heat from the condensers of a 200-MW power plant. What noneconomic factors can you identify that might also play a role in the decision-making process? Click the icon to view the alternatives description. Click the icon to view the interest and annuity table for discrete compounding when i = 10% per year. The AW of Wet Tower, Mechanical Draft is $ The AW of Wet Tower, Natural Draft is $ The AW of Dry Tower, Mechanical Draft is $ The AW of Dry Tower, Natural Draft is $ (Round to the nearest dollar.) (Round to the nearest dollar.) . (Round to the nearest dollar.) . (Round to the nearest dollar.)
Initial cost Power for I.D. fans Power for pumps Mechanical maintenance/year Service life Market value Wet Tower Mech. Draft $2.8 million 40 200-hp I.D. fans 20 150-hp pumps $0.12 million 30 years 0 Alternative Wet Tower Natural Draft $9.5 million None 20 150-hp pumps $0.11 million 30 years 0 Dry Tower Mech. Draft $4.7 million 20 200-hp I.D. fans 40 100-hp pumps $0.13 million 30 years 0 Dry Tower Natural Draft $9.1 million None 40 100-hp pumps $0.10 million 30 years 0 100 hp = 74.6 kW; cost of power to plant is 2.2 cents per kWh or kilowatt-hour; induced-draft fans and pumps operate around the clock for 365 days/year (continuously). Assume that electric motors for pumps and fans are 90% efficient.
Transcribed Image Text:Initial cost Power for I.D. fans Power for pumps Mechanical maintenance/year Service life Market value Wet Tower Mech. Draft $2.8 million 40 200-hp I.D. fans 20 150-hp pumps $0.12 million 30 years 0 Alternative Wet Tower Natural Draft $9.5 million None 20 150-hp pumps $0.11 million 30 years 0 Dry Tower Mech. Draft $4.7 million 20 200-hp I.D. fans 40 100-hp pumps $0.13 million 30 years 0 Dry Tower Natural Draft $9.1 million None 40 100-hp pumps $0.10 million 30 years 0 100 hp = 74.6 kW; cost of power to plant is 2.2 cents per kWh or kilowatt-hour; induced-draft fans and pumps operate around the clock for 365 days/year (continuously). Assume that electric motors for pumps and fans are 90% efficient.
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