ENGINEERING FUNDAMENTALS
6th Edition
ISBN: 9781337705011
Author: MOAVENI
Publisher: CENGAGE L
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Chapter 13, Problem 6P
To determine
Find the amount of coal that must be burned to sustain the generation of
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An average American consumes approximately 105 kJ of energy per day. The average life expectancy of an American is 77.9 years.
How much coal would need to be burned to provide enough energy to meet a person's energy demands if the efficiency of energy production from coal is 38%?
☐g coal
2. Consider the system described in the news: at night, when there is energy left, water is pumped from a large lake to a reservoir at 80 m above the lake level. During the day, this water is used to generate energy in a turbine located 80 m below the elevated reservoir. Considering that the water flow is always 5000 liters/s (both at the inlet of the reservoir and at the outlet) and that the pump and turbine efficiencies are 70%, what is the power (in kW) required by the pump and the power (in kW) recovered in the turbine. Data: The pipe diameter is always the same along the system (d = 0.5 m); g = 10 m/s2; γ = 9810 N/m3.
Matter transport phenomena;
Please make it typeable as handwriting interferes with understanding
Problem 10
A homeowner is trying to decide between a high-efficiency natural gas furnace with an efficiency of 95
percent and a ground-source heat pump with a COP of 3.3. The unit costs of electricity and natural gas are
$0.112/kWh and $1.44/therm (1 therm = 105, 500 kJ). Determine which system will have a lower energy
cost.
Chapter 13 Solutions
ENGINEERING FUNDAMENTALS
Ch. 13.2 - Prob. 1BYGCh. 13.2 - Prob. 2BYGCh. 13.2 - Prob. 3BYGCh. 13.2 - Prob. 4BYGCh. 13.2 - Prob. 5BYGCh. 13.2 - Prob. BYGVCh. 13.4 - Prob. 1BYGCh. 13.4 - Prob. 2BYGCh. 13.4 - Prob. 3BYGCh. 13.4 - Prob. 4BYG
Ch. 13.4 - Prob. BYGVCh. 13.5 - Prob. 1BYGCh. 13.5 - Prob. 2BYGCh. 13.5 - Prob. 3BYGCh. 13.5 - Prob. 4BYGCh. 13.5 - Prob. 5BYGCh. 13.5 - Prob. BYGVCh. 13 - Prob. 1PCh. 13 - Prob. 2PCh. 13 - An elevator has a rated capacity of 2200 lb. It...Ch. 13 - Prob. 4PCh. 13 - Prob. 5PCh. 13 - Prob. 6PCh. 13 - Prob. 7PCh. 13 - Prob. 8PCh. 13 - Prob. 9PCh. 13 - Prob. 10PCh. 13 - Prob. 12PCh. 13 - Prob. 14PCh. 13 - Prob. 15PCh. 13 - Prob. 16PCh. 13 - Prob. 17PCh. 13 - Prob. 18PCh. 13 - Prob. 19PCh. 13 - Prob. 20PCh. 13 - Prob. 22PCh. 13 - Prob. 23PCh. 13 - Prob. 24PCh. 13 - Prob. 25PCh. 13 - Prob. 26PCh. 13 - Prob. 28PCh. 13 - Prob. 29PCh. 13 - Prob. 30PCh. 13 - Prob. 31PCh. 13 - Prob. 32PCh. 13 - Prob. 33PCh. 13 - Prob. 34PCh. 13 - Prob. 35PCh. 13 - Prob. 37PCh. 13 - Prob. 38P
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- A 60 MW steam power station has a thermal efficiency of 30%. If the coal burnt has a calorific value of6950 kcal/kg, calculate :(i) the coal consumption per kWh,(ii)the coal consumption per day.arrow_forwardThe figure below shows a pump delivering 0.014 m3/s of crude oil (SG = 0.85) from an underground storage drum to the first stage of a processing system. (a) If the total energy loss in the system is , calculate the power added by the pump in kW. (b) If the power input to the pump is 16.5 kW, what is the mechanical efficiency of the pump?arrow_forwardDuring a camping trip, you see a 30-cm-diameter plastic pipe carrying water from a high reservoir to a stream in the valley. The difference in height between the reservoir's free surface and the stream is 70 meters. You come up with the concept of using this water to generate electricity. Create a power plant that gets the greatest electricity out of this resource. Also, look at the impact of electricity production on water discharge rates. What discharge rate produces the most power?arrow_forward
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