ENGINEERING FUNDAMENTALS
ENGINEERING FUNDAMENTALS
6th Edition
ISBN: 9781337705011
Author: MOAVENI
Publisher: CENGAGE L
Question
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Chapter 13, Problem 8P

(a)

To determine

Find the typical power consumption range for a home refrigerator.

(b)

To determine

Find the typical power consumption of the 25-inch television set.

(c)

To determine

Find the typical power consumption of the cloth washer.

(d)

To determine

Find the typical power consumption for the electric cloth dryer.

(e)

To determine

Find the typical power consumption of the vacuum cleaner.

(f)

To determine

Find the typical power consumption of the hair dryer.

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One of the most common appliances used on a daily basis is the hair dryer. A hair dryer is basically a duct in which a few layers of electric resistors are placed. A small fan at the back of the device pulls the air in and forces it through the resistors where it is heated (see Fig. 1). The power consumed by the heating elements (i.e. electric resistors) of the hair dryer is 1258 Watts. Air enters the hair dryer at 95 kPa and 25°C and leaves at 50°C. The cross-sectional area of the hair dryer at the exit is 55 cm². The power consumed by the fan is 2 Watts and the heat loss through the walls of the hair dryer is 5 Watts. By clearly stating your assumptions throughout, 1.Analytically describe the Fluid Mechanics and Thermodynamics working principles of the hairdryer; 2. Provide a schematic diagram of the hair dryer clearly indicating the system's boundaries, mass flows and energy/heat flows; 3. Determine the volumetric flow rate of the air at the inlet; 4. Determine the velocity of the…
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