1. The choice of a taller tower generally results in higher energy yield. Determine the number of years it takes to offset the cost differential of choosing a taller tower based on the two scenarios described below: a. Dollar value of 1.0 kWh of electricity set at $0.065 and constant over the period necessary for computations b. i. Dollar value of 1.0 kWh of electricity set at $0.065 at the start, and increasing by 6% annually ii. The additional capital subject to 2.5% interest. Use the Simple Methods discussed in class for modeling the effects of height on changes in wind speed. Generator 10 kW Rotor diameter 7.0 m Hub height/standard Hub height/desired Average wind speeds of the site Air density Overall efficiency 100.0 ft 150.0 ft 5.4 m/s (at 100.0 ft) 1.2 kg/m3 0.35 (assume constant) Surface roughness coefficient 0.1 The total cost of the tower for units 100 ft tall or higher can be estimated by: Total tower cost = $2,500.00 + h?x $0.30 Where, h denotes the tower height in ft. List any further assumptions you make. Payback period: The number of years that it will take the taller tower to offset the extra cost by the Figher energy vield. with C

1. The choice of a taller tower generally results in higher energy yield. Determine the number of years it takes to offset the cost differential of choosing a taller tower based on the two scenarios described below: a. Dollar value of 1.0 kWh of electricity set at $0.065 and constant over the period necessary for computations b. i. Dollar value of 1.0 kWh of electricity set at $0.065 at the start, and increasing by 6% annually ii. The additional capital subject to 2.5% interest. Use the Simple Methods discussed in class for modeling the effects of height on changes in wind speed. Generator 10 kW Rotor diameter 7.0 m Hub height/standard Hub height/desired Average wind speeds of the site Air density Overall efficiency 100.0 ft 150.0 ft 5.4 m/s (at 100.0 ft) 1.2 kg/m3 0.35 (assume constant) Surface roughness coefficient 0.1 The total cost of the tower for units 100 ft tall or higher can be estimated by: Total tower cost = $2,500.00 + h?x $0.30 Where, h denotes the tower height in ft. List any further assumptions you make. Payback period: The number of years that it will take the taller tower to offset the extra cost by the Figher energy vield. with C

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

See similar textbooks

Similar questions

A free hanging system of 5 kg weight, and 6 kg weight, tied together with a 4 kg rope is pulled upwards with a force of 300 N. A) what is the acceleration of the system? B) what is the tension of the system? C) what is the tension from the middle of the rope ?
A block of 3 kg, initially at rest, is pushed uphill on an incline of 30 degrees over a distance d,. The pushing force is directed horizontally and has a constant magnitude of 35 N. The surface of the incline offers a constant kinetic friction (µk = 0.3). a) Make a FBD for the block and use Newton's 2nd law to find the normal force and the friction. b) Use work-energy approach to calculate how much farther the block moves uphill after we stop pushing (this distance (d,) should be expressed as a proper or improper fraction of the "pushing distance"(d,) – I am not asking for a number!!). Take as your SYSTEM: BALL+INCLINE+EARTH. Make sure to make lists of all the forces that are relevant and to calculate the work done by each of them, as seen in the lectures.
Subject: Thermodynamics, student last digit is 5, thus p= 117, T1= 317, T2= 419
A machine costs P20,000 today and has an estimated scrap value of P2,000 after 8 years. Inflation is 8% per year. The effective annual interest rate earned on money invested is 8%. How much money needs to be set aside each year to replace the machine with an identical model 8 years from now?
A resistor is wired to a battery in a circuit and dissipates a power P1 as heat. A second battery, with the same voltage, is added in series with the first battery, leading the resistor to dissipate a power P2 as heat. How much does the resistor dissipate with two batteries, relative to with one battery, or in other words, what is the ratio P2/P1?
The efficiency of a thermal machine cannot have a value of 1 because a) There is no apparent reason, it is simply because of the way the calculation is made. b) it is impossible for a system to carry out a process in which the result is to use work to absorb heat from a source at low temperature c) it is impossible for a system to carry out a process in which the result is to absorb heat from a source at high temperature and convert it into work. d) it is impossible for a system to carry out a process in which it returns to the initial state and the result is to absorb heat from a source at high temperature and convert it entirely into work.
The average flow for the Mississippi River is approximately 1,500 cfs. It is assumed that one-fourth of this flow would be available to develop power at a dam shown below. a). what would be the annual energy in kilowatt-hours that would be produced with an overall average of 88% efficiency? b), What would the pressure P in psi?
A piston-cylinder assembly moves without friction between the two stoppers.The volume is 400 L when the piston is on the lower stopper and 600 L when it reaches the upper stopper.The cylinder initially contains 100 kPa and 20% dry water. System, water saturatedIt is heated until it becomes steam. Press 300 kPa to move the piston upaccording to need;a) Pressure in the cylinder in the final stateb) Work donec) Find the amount of heat transfer.d) Draw the pressure-specific volume graph.
6. An ideal gas with Cv = 1.62 kJ/kg-K and R = 273J/kg-K expands from 0.15m3 (cubic meter) and 27 deg. C to 0.35 m3 (cubic meter) during an isobaric process with p = 150kPa. Consider the process reversible nonflow, determine:
A car is towing a 50 kg load using a cable on a rough track with an acceleration of 4 m/s2. Determine the amount of work the car does on the load for a 300m span (g=10m/s2). a. 120 kJ b. 150 kJ c. 160 kJ d. 180 kJ
A 410 MW power plant consumes coal containing 1.167x1011 BTUS of thermal energy every day. Energy produced from the plant per day is 7400 MWh. Take 1 BTU= 1055.06 Joules. Calculate the following for given power plant. a) Efficiency b) Capacity factor
If we wanted to supply all the electricity needs for New York City (NYC), with a popula- tion of about 10 million people, using photovoltaics technology, how much land area would we need? What other elements would be required for such an idea to work for NYC? How large of an investment would this involve, and how would the price of electricity in ¢ per kWeh have to increase in order to recover that investment in 10 years at an interest rate of 8%? For comparison, the average New Yorker paid 12¢/kWeh in 2002.