A heat pump with a coefficient of performance of 1.8 supplies energy to a house at a rate of 75 MJ h-1. Determine the electrical power used by the heat pump.

Q: SL-4 A reversible refrigerator is driven by a (non-reversible) heat engine with e-0.250. Both…

A: A reversible heat engine is a work producing device which is based on Carnot's cycle and its…

Q: Consider a residential heat pump use to maintain the inside air temperature of the house at 23C.…

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Q: Q2 / Heat is transferred from a tank of water in a refrigerator at(OC) degrees to a tank of boiling…

A: GivenT1=0oC=273KT2=100oC=373KQ2=2254 kJ

Q: A room has to be maintained at 25 deg C at all times. Assuming the outside temperature of the room…

A: GivenT1=25oC=298KT2=-5oC=268KQ=42kW

Q: Two refrigerators A and B operate in series. Both refrigerators absorb energy at same rate of 1.5…

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Q: differentiate between Open Feedwater Heaters and Closed Feedwater Heater with given 1 application on…

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Q: An IC engine gives an output of 3000 J/s as when the input is 10 KW. Calculate the thermal…

A: Given:Output by engine=10KW=10×103W=Work doneHeat energy input in engine=3000Js=3000Watt(W)

Q: What is Coefficient of Performance (COP)? Also differentiate between COP and Efficiency?

A: Coefficient of Performance is ratio of desired effect to the input work. It is also  called as…

Q: téimperature čàn bê produčed din Mårch ate how many liters of hot water at 50 by a 4 m² solar…

A: Given details: Tow=50°c,Tiw=12°cA=4m2η=53%cpw=4.187j/kgk

Q: A heat engine with efficiency 60 %, driving both a heat pump and refrigerator at the same time, the…

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Q: (example question from slides) A heat pump is to be used to heat a building during the winter. The…

A: Given:TH=21°C =294 KTL=-5°C =268 KQH=135,000 KJ/h

Q: have decided now that quarantine is about over to take a trip to Hawaii. You decide to rent a small…

A: Given length and width of the windows  l×b=9×14number of windows…

Q: A pneumatic utility device is actuated by a linear actuator of 10 cm bore and 3 cm rod diameter.…

A: Write the given data with suitable variables. D=10 cm=100 mm10 mm1 cmd=3 cm=30 mm10 mm1 cmL=30…

Q: A heat pump with the COP of 2.2 supplies heat at the rate of 186 kJ/min. Determine the rate of heat…

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Q: Heat engine operates with thermal efficiency of 0.75 and rejects 30 kW of heat. The engine drives a…

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Q: A heat pump with a COP of 1.75 is provided with 80 kJ of work.How much heat (in kJ) is transferred…

A: In this problem, we are given the Coefficient of Performance (COP) of a heat pump, which is 1.75.…

Q: 1.0 A heat engine is supplied heat at the rate of 1700 kl/min and gives an output of 9 kW. Determ…

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Q: A heat engine with efficiency = 60 %, driving both a heat pump and refrigerator at the same time,…

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Q: You are considering adding a water-based thermal store work in combination with the heat pump. What…

A: Given Data: t=2.5 hrsQ=7 kWT=22oC   To Find: The volume of store.

Q: What is the Carnot efficiency of a typical geothermal plant and its power capacity in MW? The…

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Q: O O O Question No. 15 A 1000 W heater is used for 1 hr every day for 30 days. Find the cost of…

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Q: A heat engine delivers 624 J of work with an efficiency of 34%. Calculate the amount of heat (in…

A: According to the given data W=624 J η=34%  We need to find Amount of heat released by the engine

Q: A heat pump with a coefficient of performance of 3.5 provides energy at an average rate of 70000…

A: GivenCoefficient of performance COP=3.5Energy at an average rate of QH=70,000 kJ/hOutside temp…

Q: An electric heater is to heat 18 kg of oil per min. from 24.5 °C to 185.5 °C. Specific heat of oil…

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Q: A SYStem executes a power cycle while recieving 750 k) by heat transfer at a temperature of 1500°k…

A: GivenQ1=750kJT1=1500kQ2=-100kJT2=500KQ3=?T3=1000K

Q: If heat rate is 12x10° kJ/kWh, then efficiency in percentage will be equal to

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Q: A system is proposed to generate power from wastewater of 54C. If the ambient temperature is 23C,…

A: Highest thermal efficiency is given by  ηmax = Work outputHeat input          = Q1-Q2Q1           =…

Q: ) COP value b) If the outdoor temperature of the air conditioner is kept 22 C in summer, calculate…

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Q: A heat pump absorbs 10 kW of heat from outside environ- ment at 250 K while absorbing 15 kW of work.…

A: Useful data from the given question is as below, Heat absorbed from low-temperature reservoir = QL =…

Q: A hot water heater is using a heat pump system for heating the water, as shown in the figure. The…

A: please refer handwritten solution

Q: Q1/ A refrigeration system operates according to reversed Carnot cycle, low temperature is -20 °C,…

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Q: A Carnot engine requires 37 KW from the hot source. The engine produces 22 kW of power and the…

A: Power output (Pout) = 22 kWPower input (Pin) = 37 kWTemperature of the cold reservoir (Tc) = 28 °C…

Q: An electric resistance heater is used to provide space heating at an efficiency level of 100%. The…

A: Space heating demand: 1137.8 MBHConversion factor: 1 MBH = 1000 BTU/hElectricity cost: $0.13 per…

Q: A domestic refrigerator with a 2.2 copper remove heat from the refrigerated space to A rate of 75…

A: Given Data- COP=2.2 Heat remove from refrigerated space = 75 kj/min We have to find all three points

Q: The low efficiency of a system means an extra heat energy was added Ture O False O

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Q: Determine the rate of heat transfered from the atmosphere.

A: . Determine the rate of heat transferred from the atmosphere.

Q: A heat pump is used to heat a house. When the outside air temperature is 266K and the inside is…

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Q: A heat pump produces 10.8372 kW of heat while taking in 7.28103 kW of heat from a reservoir…

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Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.