AUTOMOTIVE TECHNOLOGY-NATEF TASK SHEETS
6th Edition
ISBN: 9780135257418
Author: Halderman
Publisher: PEARSON
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Chapter 18, Problem 4RQ
If an engine at sea level produces 100 hp, how many horsepower would it develop at 6,000 feet of altitude?
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2. Some of the first power-generating wind turbines were small, having blades with a radius of
8.00 meters. Currently, the largest wind turbine has a radius of 164 meters. Because the small
wind turbines are closer to the ground, they often experience smaller wind speeds.
Given the information below, how many small wind turbines would be needed to produce the
same power output as one large wind turbine? For both wind turbines, assume the air density is
1.23 kg m³.
Small Wind Turbine
Large Wind Turbine
Wind turbine blade radius
8.00 m
164 m
Wind turbine efficiency
35%
45%
Wind speed
3.50 m s1
5.50 m s1
3. Please calculate the annual electricity production of a wind farm with 20 turbines. The annual
mean wind speed is 7 m/s and diameter of the blades is 20 m. If we assume power
consumption of a person is 3,000 kWh, about how many people will this energy support?
Annual electricity production (KWh) = K Vm³ At T
Where:
-
-
-
K = 3.2 (factor based on turbine performance)
Vm= annual mean wind speed (m/s)
At = swept area of turbine (m2)
T = number of turbines
Suitable for medium- to large-scale wind turbines (> 200 m2 swept area)
The pressure ratio during the constant volume portion of combustion in a Dual Combustion engine is 1.89 . If the pressure at the end of the constant volume addition of heat is 4.49 , what is the pressure at the beginning?
Chapter 18 Solutions
AUTOMOTIVE TECHNOLOGY-NATEF TASK SHEETS
Ch. 18 - How is the angle between power strokes determined?Ch. 18 - What brands of vehicles use horizontally opposed...Ch. 18 - Prob. 3RQCh. 18 - If an engine at sea level produces 100 hp, how...Ch. 18 - What is the definition of horsepower?Ch. 18 - The chemical energy in fuel is converted to heat...Ch. 18 - An SOHC V-8 engine has how many camshafts? a. One...Ch. 18 - Prob. 3CQCh. 18 - Torque is expressed in units of _______________....Ch. 18 - Horsepower is expressed in units of...
Ch. 18 - A normally aspirated automobile engine loses about...Ch. 18 - One cylinder of an automotive four-stroke cycle...Ch. 18 - How many rotations of the crankshaft are required...Ch. 18 - A rotating force is called ________________. a....Ch. 18 - Technician A says that a crankshaft determines the...
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