FUND OF ENG THERMODYN(LLF)+WILEYPLUS
9th Edition
ISBN: 9781119391777
Author: MORAN
Publisher: WILEY
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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:
а.
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.
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As an engineer, conduct a research on the hot and cold water supply system of a building, institution, or household. Provide diagrams and photos of the equipment used in the system and explain the design and operation of the system. Finally, make recommendations on how to improve the installed system.
How does the average velocity of pedestrians in a city vary with the population size?
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