Question

assuming the BTU's/year require for a home is 1 billion was is the
cost to heat this home if electricity cost $0.12 per KWhr and your
heat pump has an average coefficient of performance of 2.7?

Answer #1

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A heat pump will be used to heat a building where the average
outside temperature is -1 degrees. There is a constant 80000 kJ / h
heat loss from the building and it is desired that the building
interior temperature is 20 degrees. The minimum power requirement
of the heat pump operating according to the Reverse
Carnot cycle is 10 kilowatts. According to this;
a) Find the heating effect coefficient of the
heat pump.
b) Since the unit...

A heat pump has a heat factor of 2.7.
a) What does it mean? Assume that the pump costs SEK 90,000 and
that the electricity price is SEK 1.5 / kWh. The house has an area
of 120 m2 and the heating requirement is 25 MWh / year. b) How
long does it take for the pump to pay? (We neglect interest rate
effects).

Select all that are true.
Group of answer choices
A heat engine will theoretically be more efficient when it is
colder out- when there is a bigger difference in temperature
between the hot and cold reservoirs.
A heat pump has a higher maximum ideal coefficient of
performance when the temperature outside is closer to the
temperature inside your house.
It is likely that one day there will be no temperature
difference between any two points in the universe and it...

1/ A retrofit project is estimated to cost $150,000. The
energy savings are expected to last 25 years, but will need a minor
upgrade of $10,000 at year 15. The retrofit is expected to save 100
MWh per year. Assuming a discount rate of 6%, and an electricity
cost of $0.12/kWh:
a/ What is the net-present value of the system ?
b/ What is the equivalent cost of the saved energy?

Duke Energy reported that the cost of electricity for an
efficient home in a particular neighborhood of Cincinnati, Ohio,
was $108 per month (Home Energy Report, Duke Energy, March, 2012).
A researcher believes that the cost of electricity for a comparable
neighborhood in Chicago, Illinois, is higher. A sample of homes in
this Chicago neighborhood will be taken and the sample mean monthly
cost of electricity will be used to test the following null and
alternative hypotheses. H 0: μ...

Duke Energy reported that the cost of electricity for an
efficient home in a particular neighborhood of Cincinnati, Ohio,
was $103 per month (Home Energy Report, Duke Energy, March, 2012).
A researcher believes that the cost of electricity for a comparable
neighborhood in Chicago, Illinois, is higher. A sample of homes in
this Chicago neighborhood will be taken and the sample mean monthly
cost of electricity will be used to test the following null and
alternative hypotheses.
H 0: μ...

Target Corp generated $10 billion of Operating Cash Flow last
year while spending $6 billion on investments in Fixed Assets
(capital expenditures) and an additional $0.5 billion on increases
in Working Capital. You expect Free Cash Flow to grow by 15% for
the next two years and then grow at 4% annually, forever. You
require a 15% expected annual return on your investment in
Target.
Estimate the value of Target using a discounted cash flow analysis,
assuming that Target has...

Someone on Craigslist wants to sell you a heat pump that has a
COP (coefficient of performance) of 3. Your friend, Donny Dont, an
eccentric inventor, says, "No, don't get that heat pump. I just
invented a normal electric space heater that is 99.99%
efficient! I will sell you one for the same price. It is
what I use." What should you do?
Group of answer choices
Don't do what Donny Dont does! If you go with his normal
electric...

12.
Suppose that real output for a small developing country in year
1 is $1.9 billion and that population is 2.1 million.
Instructions: In parts a and b, round your
answers to the nearest dollar.
a. What is per capita GDP?
$
b. If real output in year 5 increases to $2.2 billion and
population increases to 2.5 million, what is the new per capita
GDP?
$
c. Has the average standard of living for this small developing...

Suppose that a bank has $10 billion of 1-year loan and $15
billion of 5-year loan. These are financed by $15 billion of 1-year
deposit and $7 billion of 5-year deposit. The bank has equity
totaling $2 billion and its ROE (return on equity) before tax is
currently 10%.
What is the bank’s asset-liability mismatch?
What is the profit before tax?
Let X% be the rise in interest rates next year so that
the bank’s ROE will be reduced to...

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