ENGINEERING FUNDAMENTALS
6th Edition
ISBN: 9781337705011
Author: MOAVENI
Publisher: CENGAGE L
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 12, Problem 35P
To determine
Calculate the annual electric energy consumption of the washing machine and the annual cost of consumption.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Problem T3
If the shaft power is 82kw and the cost of the electricity is $0.10 kwh; estimate the cost of the electricity for
one hour. Answer $8.2
Investigate the size of a gas furnace used in a typical single-family dwelling in upstate New York, and compare that size to the furnaces used in Minnesota and in Kansas.
A stove element draws 15 A when connected to a 240-V line. How long does it take to consume 60 kJ .
Chapter 12 Solutions
ENGINEERING FUNDAMENTALS
Ch. 12.1 - In what unit is electric current measured?Ch. 12.1 - Prob. 2BYGCh. 12.1 - Prob. 3BYGCh. 12.1 - Prob. 4BYGCh. 12.1 - Prob. 5BYGCh. 12.1 - Prob. BYGVCh. 12.2 - Prob. 1BYGCh. 12.2 - Prob. 2BYGCh. 12.2 - Prob. 3BYGCh. 12.2 - Prob. 4BYG
Ch. 12.2 - Prob. 5BYGCh. 12.2 - Prob. 6BYGCh. 12.2 - Prob. BYGVCh. 12.5 - Prob. 1BYGCh. 12.5 - Prob. 2BYGCh. 12.5 - Prob. 3BYGCh. 12.5 - Prob. 4BYGCh. 12.5 - Prob. 5BYGCh. 12.5 - Prob. 6BYGCh. 12.5 - Prob. BYGVCh. 12 - Prob. 1PCh. 12 - Prob. 2PCh. 12 - Prob. 3PCh. 12 - Prob. 6PCh. 12 - Prob. 7PCh. 12 - Prob. 8PCh. 12 - Prob. 9PCh. 12 - Prob. 10PCh. 12 - Prob. 13PCh. 12 - Prob. 16PCh. 12 - Prob. 18PCh. 12 - Prob. 19PCh. 12 - Prob. 20PCh. 12 - Prob. 21PCh. 12 - Prob. 23PCh. 12 - Prob. 24PCh. 12 - As you know, a fuse is a safety device that is...Ch. 12 - Prob. 27PCh. 12 - Prob. 28PCh. 12 - Prob. 29PCh. 12 - Prob. 30PCh. 12 - Prob. 31PCh. 12 - Prob. 33PCh. 12 - Prob. 34PCh. 12 - Prob. 35PCh. 12 - Prob. 36PCh. 12 - Prob. 37P
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- 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 understandingarrow_forwardThe Energy Efficiency Rating (EER) of an air-conditioning unit is defined asthe ratio of the heat removed in Btu/h divided by the energy used in watts.The EEI (Edison Electric Institute) names an air-conditioning unit as anEnergy Star unit if it has an EER of 13 or greater. A 21⁄2-ton air-conditioningunit uses 2.41 kilowatts (2,410 watts) of energy. One ton is equivalent to12,000 Btu/h. Can this unit be termed an Energy Star unit?arrow_forwardThe Energy Efficiency Rating (EER) of an air-conditioning unit is defined asthe ratio of the heat removed in Btu/hr divided by the energy used in watts. Awindow air conditioner is rated at 5,170 Btu. It uses 470 watts of power. Whatis this unit’s EER?arrow_forward
- A water main is an 18-in-diameter concrete pressure pipe. Calculate the energy loss over a 1-mile length if it carries 7.50 ft/s of water.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_forwardYou are considering purchasing a compact washing machine, and you have the following information: • The Energy Guide claims an estimated yearly electricity use of 350 kW-hrs, based on 8 loads of laundry being washed per week. • The Energy Guide claims an estimated yearly operating cost of $38. This estimate is based on $0.1065 per kW-hr, and eight loads of laundry being washed per week. • Local electricity costs $0.086 per kW-hr. • You wash four loads of laundry per week. Based on this information, first calculate the energy that would be used by this compact washing machine in a year. Then calculate the yearly energy cost. $3.27 $15.34 $19.00 $178.40arrow_forward
- In the figure shown below, it is desired to pump 5259705 lit/day of water from a stream to a pool. El. A = 49m while El. B = 98 m. If the combined pump and motor efficiency is 90%, calculate the monthly power cost in pesos if electricity rate is P10 per kW-hr. Assume that the pump operates for 24 hours and take 1 month = 31 days; Round your answer to 4 decimal places. Pipe Length (m) Diameter (mm) Hazen Coefficient 1 1997 m 375 mm 120 2 1514 m 240 mm 122 3 902 m 205 mm 149arrow_forwardConsider a 400-MW, 32 percent efficient coal-fired power plant that uses cooling water withdrawn from a nearby river (with an upstream flow of 10-m3/s and temperature 20 °C) to take care of waste heat. The heat content of the coal is 8,000 Btu/lb, the carbon content is 60% by mass, and the sulfur content is 2% by mass. How much electricity (in kWh/yr) would the plant produce each year? How many pounds per hour of coal would need to be burned at the plant? Estimate the annual carbon emissions from the plant (in metric tons C/year). If the cooling water is only allowed to rise in temperature by 10 °C, what flow rate (in m3/s) from the stream would be required? What would be the river temperature if all the waste heat was transferred to the river water assuming no heat losses during transfer? Estimate the hourly SO2 emissions (in kg/h) from the plant assuming that all the sulfur is oxidized to SO2 during combustion.arrow_forwardAn 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_forward
- 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.arrow_forwardA 1000 MW coal fired power plant (30% efficiency). The coal is 75% carbon and has a heat content of 10, 000 BTU/lb. What is the carbon emission (ton carbon per year)?A 1000 MW natural gas plant (45% efficiency). The gas is CH4 with a heat content 800 BTU/mol. What is the carbon emission (ton carbon per year)?Calculate carbon emission reduction if the above natural gas plant is used to replace the coal fired plant.(Here ton is metric ton, 1 ton=2,200 lb)arrow_forwardAn 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_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