Consider refrigerator whose 40 watts light bulb remains on continuously as a result of a malfunction of the switch. If the refrigerator has a COP of 1.3 and the cost of electricity is 8 cents per kW-hr., determine the increase in the energy consumption of the refrigerator and its cost per year if the switch is not fixed.

Consider refrigerator whose 40 watts light bulb remains on continuously as a result of a malfunction of the switch. If the refrigerator has a COP of 1.3 and the cost of electricity is 8 cents per kW-hr., determine the increase in the energy consumption of the refrigerator and its cost per year if the switch is not fixed.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: The heat removal rate from a refrigerated space is 7.2 kW and the power input to the compressor is…

A: Given, Rate of heat removal from refrigerated space = Q2 = 7.2 kW Power input = W = 1.8 kW…

Q: Figure shows a single-solar-collector panel with a total surface area of 2.97 m^2. The panel…

A: givensurface area of plate A=2.97m2energy lost to surrounding =0.36×total radaitive heat water…

Q: Q 1- A Carnot refrigerator operates in a room in which the temperature is 22°C and consumes 2 kW of…

Q: A 650 MW steam power plant has an efficiency of 62%.it is cooled by rejecting heat to a nearby…

A: Given Data: Power produced, P=650 MW Efficiency, n=62 %

Q: thermal machine operates between 2 tanks at 800ºC and 20ºC; half of the power produced by this…

Q: A heat pump with a COP of 1.4 is to produce a 100,000 Btu/h heating effect. How much power does this…

A: coefficient of performance for a pump is the ratio of heat production rate to the input power…

Q: A household refrigerator runs one-fourth of the time and removes heat from the food compartment at…

A: the average rate of heat removal ( ) = 800 kJ/hr (i.e if refrigerator works for one hour then it…

Q: An air conditioner removes heat steadily from a house at a rate of 750 kJ/min while drawing electric…

A: COP of air conditioner is ratio of rate of heat extracted from room to power supplied to air…

Q: An engineer designs a heat engine using flat-plate solar col-lectors. The collectors deliver heat at…

A: Before finding the efficiency we need to convert the value of temperature from °C to K.

Q: Determine the COP of a refrigerator that removes heat from the food compartment at a rate of 5040…

Q: A device collects energy from the sun's rays and produces a high temperature of 95 °C. A small heat…

A: Given Data TH=95°C TL=15°C=288 K

Q: A heat engine is used to pump oil out of an underground mine. If the heat engine produces 400 kJ of…

A: A heat engine operates on the principle of energy conservation. It accepts heat from a…

Q: A household refrigerator draws 113.9 W of electricity in order to keep its refrigerated compartment…

A: Given Data Electricity consumed by refrigerator, W=113.9W Heat transfer from room to the…

Q: A heat pump is used for cooling in summer and heating in winter. The house is maintained at 24 C…

Q: A Carnot heat engine receives heat from a high temperature source at 655°C and rejects heat to a…

Q: A heat pump uses 100 J of energy as it operates for a given time. Isit possible for the heat pump to…

A: Heat pump is thermodynamic device which fetches or extracts heat energy from a thermal heat…

Q: air-conditioning system is used to maintain a house at 75°F when the temperature outside is 95°F.…

Q: A heat pump with a motor of 2 kW is used to keep a chicken hatchery at 30°C. This latter loses…

A: Given: The power of motor, W = 2 kW The temperature at the chicken hatchery, T1 = 30oC The heat loss…

Q: o a low-temperature sink at

A: given:Q2=315kWT2=12+273=285KQ1=657kW

Q: A heat pump supplies heat to a house at a rate of 30,000 kJ/hr. If the power consumed by the heat…

Q: Consider a homeowner who is replacing his 25-yearold natural gas furnace that has an efficiency of…

A: The cost of useful heat for the old heater is The annual cost of heating the conventional heater…

Q: Problem 3 - Air Conditioning ( An office building has a window air conditioner with a COP of 2 that…

Question

Fill in the blanks:
Consider refrigerator whose 40 watts light bulb remains on continuously as a result of a malfunction of the switch. If the refrigerator
has a COP of 1.3 and the cost of electricity is 8 cents per kW-hr., determine the increase in the energy consumption of the refrigerator
and its cost per year if the switch is not fixed.
Php |

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Trending now

This is a popular solution!

Step by step

Solved in 4 steps with 5 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A heat pump absorbs 10 kW of heat from outside environment at 250 K while absorbing 15 kW of work. It delivers the heat to a room that must be kept warm at 300 K. The Coefficient of performance (COP) of the heat pump is
A heat pump keeps the house at 20°C while the ambient (outside) temperature is 0°C. from the roof and The heat loss from the walls is 3000 kJ/h per degree temperature difference between the indoor and outdoor environment. Determine the minimum theoretical power in kW required to operate the heat pump.
A nonpolluting power plant can be constructed using the temperature difference in the ocean. At the surface of the ocean in tropical climates, the average water temperature year-round is 30°C. At a depth of 305 m, the temperature is 5.4°C. Determine the maximum thermal efficiency of such a power plant.
A house loses heat at a rate of 5400 kJ/h per °C difference between the indoors and outdoors. If a 3.8-kW heat pump is used to maintain this house at 22°C, determine the lowest outdoor temperature for which the heat pump can meet the heating requirements of this house. O-8.1 °C O-67 °C O-5.3 °C O-42 "C
A domestic refrigerator with a COP of 1.2 removes heat from the refrigerated space at a rate of 60 kJ/min. Determine a) the electrical power consumed by the refrigerator and b) the rate of heat transfer to the kitchen air.
An electric resistance heater is used to provide space heating at an efficiency level of 100%. The electricity is sold at $0.13 per kWh. Question: How much money is needed if 1137.8 MBH is demanded? Hint: 1 MBH equals 1,000 btuh
A claim states that a power cycle has been invented that produces work of 400KJ and requires energy transfer to the system of 300kJ. Such device is possible. O True O False
(3) A reversed Carnot engine removes 40,000 kW from a heat sink. The temperature of the heat sink is 260K and the temperature of the heat reservoir is 320 K. Determine the power required of the engine. Ans. 9230.7 kW
The homeowner would like to buy the high-efficiency furnace if the savings from the natural gas pay for the additional cost in less than 8 years. If the homeowner now pays $1200 a year for heating, determine if he should buy the conventional or the highefficiency model.
heat pump with a coefficient of performance of 2.5 supplies energy to a house at a rate of 60,000 Btu/h. Determine (a) the electric pwer drawn by the heat pump and (b) the rate of heat absoption from the outside air.
A homeowner is trying to decide between a highefficiency natural gas furnace with an efficiency of 97 percent and a ground-source heat pump with a COP of 3.5. The unit costs of electricity and natural gas are $0.115/kWh and $0.75/therm (1 therm = 105,500 kJ). Determine which system will have a lower energy cost.
A food freezer is to produce a 5-kW cooling effect, and its COP is 1.3. How many kW of power will this refrigerator require for operation?