Consider a coal-fired steam power plant that produces 175 MW of electric power. The power plant operates on a simple ideal Rankine cycle with turbine inlet conditions of 7 MPa and 550C and a condenser pressure of 15 kPa. The coal has a heating value (energy released when the fuel is burned) of 29,300 kJ/kg. Assuming that 85 percent of this energy is transferred to the steam in the boiler and that the electric generator has an efficiency of 96 percent, determine (a) the overall plant efficiency (the ratio of net electric power output to the energy input as fuel) and (b) the required rate of coal supply

Q: 170 g of water at 105°C is converted to steam. What is the entropy change of the water that is now…

A: latent heat of boiling water = 2256 KJ/kg  = 2256 J/g mass = 170 g Heat required to change the state…

Q: An engine with an output of 249.0 W has an efficiency of 25.0 %. It works at 10.00 cycles/s. How…

A: It is given that the output power is 249.0W. It is the work done per second. This implies, 249.0 J…

Q: The temperature of the cold reservoir of the engine is 305 K. It has an efficiency of 0.23 and…

A: The problem can be solved by using the concept of efficiency of a heat engine. The answer for the…

Q: A heat source generates heat at a rate of 55.0 W (1 W=1 J/s)55.0 W (1 W=1 J/s). How much entropy…

A: Given;-  A heat source generates heat at a rate of  P = 55 W = 55 J/sec  The surrounding temperature…

Q: A heat engine absorbs 1900J of energy from a hot reservoir at 2900C and expels 1400J to the cold…

A: Represent it on diagram for better understanding a) Efficiency of heat engine can be determined as

Q: An ideal Carnot engine operates between a high-temperature reservoir at 492K and a river with water…

A: Given: The high temperature of the engine is 492 K. The low temperature of the engine is 290 K. The…

Q: A heat pump has a coefficient of performance of 3.1. Hint   If it requires 290 J of work per…

A:

Q: A freezer sustains a cold environment of -39°C and exhausts its heat at 38°C. Assume a Carnot cycle.…

A: The efficiency (η) of a Carnot cycle is given by: η=(Tc-Th)Tc Where:Tc is the temperature of the…

Q: An engine absorbs 1.74 kJ from a hot reservoir at 277°C and expels 1.19 kJ to a cold reservoir at…

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Q: A heat engine operates in a Carnot cycle between 72.0°C and 345°C. It absorbs 20,400 J of energy per…

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Q: A Carnot engine has an efficiency of 0.93 and the temperature of its cold reservoir is 81 K. If the…

A: The efficiency of the heat engine is given by, η=WQH Here, W is the work output and QH is the heat…

Q: A heat engine performs 613 J of work in each cycle and has an efficiency of 0.2. For each cycle, how…

A: Answer  : We know the efficiency of a heat engine is    :                             η = Work done…

Q: A Carnot engine having an efficiency of 1/10 is being used as a refrigerator. If the work done on…

A: For Carnot engine using as refrigerator,  Work done on engine is given byW=Q1-Q2…

Q: from a hot reservoir at

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Q: A Carnot refrigeration cycle is used as a reference to estimate the energy required in an attempt to…

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Q: A heat engine receives heat in the amount of Q,= 525 kJ from a high temperature thermal reservoir…

A: Given Amount of heat received by the heat engine Qh = 525 kJ Net work done by the heat engine Wnet…

Q: An engine absorbs 3500J of heat each cycle and expels 1200J. (a) How much work does it do in one…

A:

Q: An engine absorbs 1.71 kJ from a hot reservoir at 277°C and expels 1.22 kJ to a cold reservoir at…

A: Given data: The heat absorbed by the engine is Qa=1.71 kJ The temperature of the hot reservoir is…

Q: A gasoline truck engine takes in 10,000 J of heat and delivers 2,000 J of mechanical work per cycle.…

A: Find the heat energy due to cold reservoir. QH=W+QCQC=QH-W=10,000 J-2,000 J=8000 J The entropy of…

Q: A gasoline engine has a compression ratio of 8.00 and uses a gas for which y = 1.40. (a) What is the…

A: Fhjknncc

Q: A heat engine operates in a Carnot cycle between 76.0°C and 345°C. It absorbs 21,600 J of energy per…

A:

Q: A Carnot engine operates between reservoirs at 400 degrees C and 30 degrees C. (A) Calculate the…

A: Given:- T1 = 400oC = 673 K T2 = 30 oC = 303 K Find;- (a) Calculate the efficiency of the engine. (b)…

Q: A heat engine with an efficiency of 0.21 absorbs 400 J of heat per cycle. Hint a. How much work does…

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Q: In each cycle of its operation, a refrigerator removes 19 J of heat from the inside of the…

A: The amount of work done to operate the refrigerator is calculated using the following formula: W =…

Q: A Carnot engine operates between two temperatures of 300°C and 130°C while absorbing 650 kJ of heat…

A:

Q: A large block of copper initially at 22.5°C is placed in a vat of hot water (83.2°C). The first 2.20…

A: Temperature of Copper Temperature of Water Heat flow To Determine:The entropy change of the system.

Q: A heat pump that operates based on an ideal Carnot cycle delivers output heat into a building at 312…

A:

Q: A Carnot engine has a cycle with a high temperature of 900 K and a low temperature of 250 K. If the…

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Q: A heat engine operates in a Carnot cycle between 78.0°C and 345°C. It absorbs 20,000 J of energy per…

A: temperature of cold reservoir, Tc =78.0°C = 351 K temperature of hot reservoir, TH = 345°C = 618 K…

Q: a refrigerator removes heat from the cubicle at the rate of 20kj and ejects 24kj into a room per…

A: Given in question:   Heat removed from the cubicle per cycle(QR) = 20 KJ…

Q: In one cycle a heat engine absorbs 520 J from a high-temperature reservoir and expels 310 J to a…

A:

Q: 170 g of water at 105°C is converted to steam. What is the entropy change of the water that is now…

A: The expression for find change in entropy is ∆s=mLvT

Q: A diesel generator supplies a small mine, not connected to a power grid, with power. The maximum…

A:

Q: A heat engine takes in 1800 J of heat from a high temperature reservoir and rejects 1200 J of heat…

A: Answer is Option (a) The expression used to work done by each cycle of engine is W=Qh-Qc Substitute…

Q: A heat engine operates between a high temperature of 1000 °C and a low temperature of 500 °C. Assume…

A: This problem can be solved using the formula for efficiency of carnot engine.

Q: A Carnot cycle operating between 770 K and 300 K produces 54 kJ of work. Compute the efficiency. O…

A: Given Temperature of source (T1) = 770K Temperature of sink (T2) = 300k

Q: The bulldozer for the DPWH road widening project at Koronadal City has a gasoline engine that takes…

A: Introduction: Concepts of Heat Engine: It is a thermodynamic engine works on a first law of…

Q: A heat engine is found to have an efficiency of 0.33. If it does 190 J of work per cycle, how much…

A:

Q: The temperature of the cold reservoir of the engine is 310 K. It has an efficiency of 0.23 and…

A: Given: The temperature is T=310 K. The efficiency id n=0.23. The heat absorbs is Q=647 J. Part (a)…