Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
expand_more
expand_more
format_list_bulleted
Question
Chapter 2, Problem 17P
To determine
How the given condition of power consumption affect the per person in the family of two.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
1) Heating the water in a 55-gallon water heater requires about 2.0 x 103 kJ of energy.
a) Assume the energy came from natural gas with 80% efficiency; how many grams of natural gas are required?
b) Assume the energy came from electricity with 80% efficiency and that the electricity was produced from the combustion of coal with 30% efficiency; how many grams of coal are required?
For problem above, calculate how much CO2 in grams is emitted to the atmosphere.
For a: Use the balanced equation for the combustion of methane (CH4) to determine how many grams of CO2are produced from the amount of natural gas required.
For b: Assume that coal produces 5.25 kJ of energy per gram of CO2 produced. Calculate how much CO2 in grams is produced.
Choose which of the following
statement is false.
O a. Saving electricity will help
preserve our sources of
non-renewable energy
O b. Electricity is a primary
source of energy that
provides lights to our
homes.
O c. Electricity is a secondary
source of energy
O d. Electrical energy can be
derived from sun, wind and
oil
During 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?
Chapter 2 Solutions
Sustainable Energy
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
Knowledge Booster
Similar questions
- An air-conditioning unit has a cooling capacity of two tons. If the unit has a rated energy efficiency ratio (EER) of 11, how much electrical energy is consumed by the unit in 1 h? If a power company charges 14 cents per kWh usage, how much would it cost to run the air-conditioning unit for a month (31 days), assuming the unit runs 8 h a day? What is the coefficient of performance (COP) for the given air-conditioning unit?arrow_forwardReplacing incandescent lights with energy-efficient fluorescent lights can reduce the lighting energy consumption to one-fourth of what it was before. The energy consumed by the lamps is eventually converted to heat, and thus switching to energy-efficient lighting also reduces the cooling load in summer but increases the heating load in winter. Consider a building that is heated by a natural gas furnace with an efficiency of 80 percent and cooled by an air conditioner with a COP of 3.5. If electricity costs $0.12/kWh and natural gas costs $1.40/therm (1 therm = 105,500 kJ), determine if efficient lighting will increase or decrease the total energy cost of the building (a) in summer and (b) in winter.arrow_forwardAssume that gasoline is burned with 99% efficiency in a car engine, with 1% remaining unbumed in the exhaust gases as VOCs; If the engine exhausts 16 kg of gases (MW = 30) for each kg of gasoline (MW = 100), calculate the fraction of VOCs in the exhaust. Give your answer in parts per million.arrow_forward
- Find the question,I hope to write the solution method in detail and write the laws used (EV, PV,..), thanx.arrow_forwardA factory uses carbonic acid in its industrial processes so that 90% by weight is used in industry and the rest is emitted into the atmosphere as pollutants. Calculate the amount of carbon dioxide emitted into the atmosphere per hour. If you know that the amount of carbonic acid used daily is 3 tons and the factory works 12 hours a dayarrow_forwardArial CD E1 Question 3 Airplane of 150 tonnes reaches the speed of 900 km/h and altitude of 12.0 km. Its engines produce 100 MW of power. a) Convert all the above information into Sl units without prefixes (1 tonne = 1000 kg). Use scientific notation where appropriate. b) Calculate the kinetic energy the airplane acquires when it reaches the given speed. c) Calculate the potential energy of the airplane once it reaches the specified height. d) Given its speed and height, what is the total mechanical energy of the airplane? e) Given the power of its engines, calculate the time it would take to reach the stated speed and altitude. Express your answer in seconds.arrow_forward
- An inventor claims to have developed a refrigerator that at steady state requires a net power input of 1.1 horsepower to remove 12,000 Btu/h of energy by heat transfer from the freezer compartment at 20°F and discharge energy by heat transfer to a kitchen at 70°F. Evaluate this claim. The inventor's claim isarrow_forwardCalculation of Energy saving We are given that Average energy use for waste water treatment = 652 KWh for 625,853 gallons Average energy use for 1 gallon waste water treatment = 652625,853 KWh Per day Average energy use for 29.522 Million gallon waste water treatment = 652625,853*29.522*106 Per day Average energy use for 29.522 Million gallon waste water treatment = 30753.29 KWh " Per day Energy saving = 30753.29 KWh " Finding How to come up with 30753.29KWh? If 652 KWh for 625,853 gallons 652,853*29.522*106 = ??arrow_forwardI. A man takes 40 mg of a certain medicine. Each hour, the amount of medicine in the man's system decreases by 30%. How much medicine is left in the man's system after 5 hours? II. Consider an object in a surrounding with constant temperature of 25°C. If the temperature of the object decreases from 100°C to 90°C in 10 minutes, how much longer will it take for its temperature to cool to 80°C ?arrow_forward
- • 1 million people in Hong Kong using low-flush toilet and low-flow shower head.• 1 million leaky toilet and Faucet. Find1. How much energy we can save?2. How much coal (Kg) we can save?3. How much CO2 we can reduce?4. How many African children (1 liter/kid/day) we can support? Energy needed to treat water1. Average energy use for water treatment drawn from southern California studies is 652 kWh per acre-foot (AF), where one AF = 325,853 gallons. Thermal Energy in Coal2. The thermal power plants consume about 0.45 kg of coal per kWh. Energy output/fire power plant3. A typical 500 megawatt coal power plant produces 3.5 billion kWh per year. CO2 Emission4. Taking coal to contain 50 percent carbon, which combines with oxygen during burning to form CO2, we can arrive at 1.83 kg CO2 for every 1 kg of coal burned.arrow_forwardQ2 A dam is used to store 700 tons of water to provide energy when needed by using turbines. If the water is stored at a height of 60 meters above ground level, calculate how much energy is stored if the water was to be released to ground level. Provide and analyse two alternative methods of energy storage.arrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
Engineering Fundamentals: An Introduction to Engi...Civil EngineeringISBN:9781305084766Author:Saeed MoaveniPublisher:Cengage Learning
Engineering Fundamentals: An Introduction to Engi...
Civil Engineering
ISBN:9781305084766
Author:Saeed Moaveni
Publisher:Cengage Learning