Solve step by step Problem 3: A heat pump operating at steady state maintains a dwelling at 22°C on a day when the outsidetemperature is -5°C. Energy is loss by heat transfer from the dwelling at a rate of 20000 J/s while the heatpump's power input is 8kW.• a) Determine the coefficient of performance of the heat pump.•b) Determine the power input required if it was a Carnot heat pump.Sketch a well-labelled diagram (indicating thermal reservoirs, temperatures, heat flow, work, etc.)

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Answered: Problem 3: A heat pump operating at…

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

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2) A heat pump with the amount of heat of liquid refrigerant (mix) when it will enter the expansion of 480 Btu/lb. while the amount of heat from the refrigerant vapor after leaving the evaporator is 412 Btu/lb. What is the coefficient of performance (COP) if the heat amount of the superheated refrigerant after being compressed by the compressor has a value of 572 Btu/lb?
Hi I need help with a thermo review question- thank you! A refrigerator transfers 6 kW of heat from the cold space at 277 K and transfers 10kW of heat to the surroundings at 300 K. a) Determine the Rate of Work input required (kW). b) Determine the Refrigerator Coefficient of Performance c) Determine the Coefficient of Performance if it’s a Carnot Refrigerator
Refrigerationa.) Explain why you can’t cool down your kitchen by leaving your refrigerator or freezer door open with your refrigerator plugged in for an extended period of time.b.) The condenser of a home refrigerator is commonly underneath the appliance, thus the condensing refrigerant exchanges heat with household air, which averages 70oF. It is proposed toreconfigure a refrigerator so that the condenser is in the garage, where the average yearly temperature is about 50oF. Assume a freezer temperature of 0oF, a minimum temperature difference of 10K for heat transfer, and an actual coefficient of performance of 60% that of a Carnot cycle. Calculate the Coefficient of Performance for both configurations and discuss the pros and cons of this proposal.c.) Which is the most effective way to increase the coefficient of performance of a Carnot refrigerator: to increase TC with TH held constant or to decrease TH with TC held constant? Justify mathematically. For a real refrigerator, do…
1.5. A refrigerator is used to cool 4 litres of soft drink from room temperature (25 °C) to 3 °C. If the density of the soft drink is 1015 kg/m3 (1 litre = 0.001 m³), how much heat must be removed if the specific heat of the soft drink is 4350 J/kg °C. 1.6. An engine operating in a cycle absorbs 5000 cal of the heat from a heat source and performs 2000 cal of work. Calculate: (a) The amount of heat discarded in this cycle (b) The efficiency of the engine
A heat pump is used to heat a house. When the outside air temperature is 266K and the inside is maintained at 293K, the heat loss from the house is 195 kW. a. What is the minimum electric power (kW) required to operate the heat pump? b. What is the rate of heat transfer to the heat pump? C. What is the COP for an ideal heat pump operating between these temperatures?
Needs Complete typed solution with 100 % accuracy.
3.15 The heating rate that a heat pump delivers to a living space of tempera- ture 20°C is 5 kW. The coefficient of performance of the heat pump is COP = 2. The temperature of the ambient is 0°C. (a) What is the electrical power required by the heat pump? (b) What is the rate at which the heat pump draws heat from the ambient? (c) What is the highest COP value that the heat pump may attain? (d) Is the operation of this heat pump violating the second law of thermodynamics?
Don't Copy, Is the answer is 10.53? Please do verify fast with explanation.
Goal Solve for the efficiency of a heat engine using a five-step process the includes:1. Making a state table.2. Making a process table.3. Calculating the totals for Work, Heat, and Internal-Energy-Change.4. Identifying the heat input (hot reservoir) and output (cold reservoir).5. Calculating the efficiency of the engine.Problem Shown in the figure to the right is a cyclic process undergone by a heat engine. Your heat engine shall use 7.0 moles of nitrogen gas (diatomic). During the process a->b, the pressure rises by a factor of 2.0. solution- (1) Fill in the State Table (all pressures in Pascals, all volumes in cubic meters, all temperatures in K). Pressure Volume Temperature a b c (2) Fill in the Process Table (all entries in Joules). Work Heat dU a->b b->c c->a (3) Find the Totals: Work = J Heat = J dU = J (4) Find the heat input (from "hot reservoir") and the heat output (to…
1) A geothermal facility operates at 1/3 of the Carnot efficiency. If the cold reservoirhas a temperature of 70°C, calculate and plot the efficiency of the facility as afunction of the geothermal fluid temperature from 100°C to 300°C. (remember toconvert to Kelvin!)1b) If a minimum efficiency of 5% is needed for this facility to be economicallyviable, what is the required minimum temperature of the geothermal fluid?
PROBLEM 2A household refrigerator has a coefficient of performance of 3 and requires a net powerinput of 0.8 kW. Question:(a) Determine the rate of heat transfer removed from the refrigerated space.(b) Determine the rate of heat transfer discharged from the refrigerator to thesurrounding kitchen.(c) Determine the annual cost in $ for supplying power to the refrigerator assuming24/7 operation and a cost of 12 cents per kWh.

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