SUSTAINABLE ENERGY (LL)
2nd Edition
ISBN: 9780357667224
Author: DUNLAP
Publisher: CENGAGE L
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Chapter 2, Problem 9P
To determine
Find the decrease in the cost of electricity per kilowatt-hour if the payback period is changed from 15 years to 25 years.
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Steven installed a new solar system on his
roof. Calculate the watt capacity of his
system and the cost ($/Wh) using the
following information: Insolation: 3
kWh/m^2/day. System life: 10 years.
Discount rate: 4%.
The annual average insolation for a fixed solar panel in
city A is 350 W/m2. On the other hand, city B has a figure
of 300 W/m?. For both locations, the solar panel has the
capability to convert 17% of the incident energy into
electricity. Average annual electricity in City A is 13 000
kWh with an average cost of $0.4/kWh, while in city B, it
is 10 000 kWh at a cost of $0.75/kWh.
For City A,
a. Determine the area of the solar panel needed in order
to suffice the average electrical needs of a residence.
b. Determine the area of the solar panel needed in order
to suffice the average electrical needs of a residence in
City B.
c. Determine the price per square meter of solar panel in
City A if the device has a lifetime of 20 years. Assume
that the electricity costs are constant throughout the
period.
d. Determine the price per square meter of solar panel in
City B if the device has a lifetime of 20 years. Assume
that the electricity costs are constant throughout the
period.
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
Chapter 2 Solutions
SUSTAINABLE ENERGY (LL)
Ch. 2 - A quantity has a doubling time of 110 years....Ch. 2 - The population of a particular country has a...Ch. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - The total world population in 2012 was about 7...Ch. 2 - The population of a state is 25,600 in the year...Ch. 2 - The population of a country as a function of time...Ch. 2 - Prob. 9PCh. 2 - Prob. 10PCh. 2 - Prob. 11P
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