ENGINEERING YOUR FUTURE
9th Edition
ISBN: 9780190279288
Author: Oakes
Publisher: OXF
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Chapter 2, Problem 2.23EAA
a.
To determine
A report on how the cell-phones work and what engineering disciplines are involved in their design and manufacture.
b.
To determine
A report on how the CT Scan Machine work and what engineering disciplines are involved in their design and manufacture.
c.
To determine
A report on how the DVD Player work and what engineering disciplines are involved in their design and manufacture.
d.
To determine
A report on how the Dialysis Machine work and what engineering disciplines are involved in their design and manufacture.
e.
To determine
A report on how the Flat-screen TV works and what engineering disciplines are involved in their design and manufacture.
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A commercial office building is located in the city of Lansing, Michigan, and is heatedusing a gaseous fuel with a heating value of 725 Btu/std ft3. The indoor designtemperature is 71ºF. The heat load for the building is known to be 250,000 Btu/hr. Thisheat load accounts for the fact that there are internal heat gains in the building, due tothe presence of people and electronic equipment (e.g., lights and radios). People in thebuilding are usually seated and involved in light activity.a) The furnace had an initial efficiency factor of 73% when installed, but since thenefficiency-improvement retrofits were implemented that raised the efficiency factorto its present value of 82%. The building was designed using the 99% designheating temperature value for the city to determine the outdoor design temperature.Evaluate the annual fuel quantity (in std ft3) required to heat the building, using thedegree-day or bin method.b) Seventy people use the building, but the occupancy pattern for the…
The volumetric flow rate of air through a duct transition of the type shown in Table 12-9b (rectangular with two parallel sides) is 2 m3/s. The duct before the transition issquare, with a height of 50 cm. The expansion ratio across the transition is 4 (i.e., theduct area after the transition is 4 times greater than the duct area before the transition).a) Determine the pressure loss (in Pa) across the transition if the exit from the duct isabrupt (i.e., the diverging angle of the transition is 180º).b) Determine the percentage reduction in pressure loss for a transition diverging angleof 20º compared to the one in part (a).c) The head HVAC engineer requires the pressure loss across the transition to bereduced to less than 50% of the pressure loss for an abrupt exit (i.e., the case in part(a)), and suggests a transition diverging angle of 45º. Will this new diverging angleachieve the required reduction in pressure loss? Justify your answer.d) For a transition diverging angle of 90º, the…
Chapter 2 Solutions
ENGINEERING YOUR FUTURE
Ch. 2 - Prob. 2.1EAACh. 2 - Prob. 2.2EAACh. 2 - Prob. 2.3EAACh. 2 - Prob. 2.4EAACh. 2 - Prob. 2.5EAACh. 2 - Prob. 2.6EAACh. 2 - Prob. 2.7EAACh. 2 - Prob. 2.8EAACh. 2 - Prob. 2.9EAACh. 2 - Prob. 2.10EAA
Ch. 2 - Prob. 2.11EAACh. 2 - Prob. 2.12EAACh. 2 - Prob. 2.13EAACh. 2 - Prob. 2.14EAACh. 2 - Prob. 2.15EAACh. 2 - Prob. 2.16EAACh. 2 - Prob. 2.17EAACh. 2 - Prob. 2.18EAACh. 2 - Prob. 2.19EAACh. 2 - Prob. 2.20EAACh. 2 - Prob. 2.21EAACh. 2 - Prob. 2.22EAACh. 2 - Prob. 2.23EAACh. 2 - Prob. 2.24EAACh. 2 - Prob. 2.25EAACh. 2 - Prob. 2.26EAACh. 2 - Prob. 2.27EAACh. 2 - Prob. 2.28EAACh. 2 - Prob. 2.29EAACh. 2 - Prob. 2.30EAACh. 2 - Prob. 2.31EAACh. 2 - Prob. 2.32EAACh. 2 - Prob. 2.33EAACh. 2 - Prob. 2.34EAACh. 2 - Prob. 2.35EAACh. 2 - Prob. 2.36EAACh. 2 - Prob. 2.37EAACh. 2 - Prob. 2.38EAACh. 2 - Prob. 2.39EAACh. 2 - Prob. 2.40EAACh. 2 - Prob. 2.41EAACh. 2 - Prob. 2.42EAACh. 2 - Prob. 2.43EAACh. 2 - Prob. 2.44EAACh. 2 - Prob. 2.45EAACh. 2 - Prob. 2.46EAACh. 2 - Prob. 2.47EAACh. 2 - Prob. 2.48EAACh. 2 - Prob. 2.49EAACh. 2 - Prob. 2.50EAA
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- The volumetric flow rate of air through a duct transition of the type shown in Table 12-9b (rectangular with two parallel sides) is 2 m3/s. The duct before the transition issquare, with a height of 50 cm. The expansion ratio across the transition is 4 (i.e., theduct area after the transition is 4 times greater than the duct area before the transition).a) Determine the pressure loss (in Pa) across the transition if the exit from the duct isabrupt (i.e., the diverging angle of the transition is 180º).b) Determine the percentage reduction in pressure loss for a transition diverging angleof 20º compared to the one in part (a).c) The head HVAC engineer requires the pressure loss across the transition to bereduced to less than 50% of the pressure loss for an abrupt exit (i.e., the case in part(a)), and suggests a transition diverging angle of 45º. Will this new diverging angleachieve the required reduction in pressure loss? Justify your answer.d) For a transition diverging angle of 90º, the…arrow_forwardAuto Controls The figure is a schematic diagram of an aircraft elevator control system. The input to the systemin the deflection angle of the control lever , and the output is the elevator angle phi.show that for each angle theta of the control lever ,there is a corresponding elevator angle phi. Then find Y(s)/theta(s) and simplify the resulting transfer function . Also note from the diagram that y and phi is related Show full solution, no copied solutionsarrow_forwardhand-written solutions only. correct answers upvotedarrow_forward
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