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: 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 certain gasoline engine has an efficiency of 37.3%. What would the hot reservoir temperature be…

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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: from a hot reservoir at

A:

Q: An ideal gas heat engine operates in a Carnot Cycle between temperatures of 266°C and 115°C. It…

A: Given data: Thot = 266°C = 539 K Tcold = 115°C = 388 K   Solution: Efficiency = 1 - ( Tcold / Thot )…

Q: A Carnot engine has an efficiency of 30% when the temperature of the sink is 122° F. Then the…

A: Given data, Initially efficiency is ηi=30 %. Temperature of sink Tsink=1220 F. Final efficiency…

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

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: During each cycle, a Carnot engine absorbs 780 J as heat from a high-temperature reservoir at 378 K,…

A:

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

A:

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

A:

Q: Steam locomotives have an efficiency of 18.2% and operate with a hot steam temperature of 455°C.…

A: Hence the answer in three significant figures is 596.K.

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 engine operates in a Carnot cycle between 80.0°C and 350°C. It absorbs 21 000 J of energy per…

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

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Q: Two hundred joules of heat are removed from a heat reservoir at a temperature of 200 K. What is the…

A: Given data: The heat removed from a reservoir is: Q = 200 J The temperature at which heat is…

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

A:

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 Carnot engine receives heat from source at 327°C causing an increase in entropy is equal to 5…

A: Given: ∆S=5 kJ/kg K,W=2000 kJ/kg Temperature of source,          T1=327oC=600 K    Source (heat…

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

A:

Q: In every cycle of its operation, a Carnot engine takes in 640 J of heat from a reservoir at 380 K…

A: In the given question , We have to determine the change in entropy of the engine during one cycle.

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 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: You design an engine that takes in 26 kJ of heat at 720 K in each cycle and rejects heat at a…

A:

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: A heat pump extracts 7.0 × 106 J of heat per hour from a well at 280 K and delivers its output heat…

A: write the equation for cofficient of performance of heat pump.Cop =QHWin =THTH  -TL…

Q: A Carnot engine has an efficiency of 30% when the temperature of the sink is 122° F. Then the…

A: Given data, In first case, Efficiency η1=30 %. Temperature of sink Tsink1=1220 F. In second case,…

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)…

Q: A certain heat engine operating on a Carnot cycleabsorbs410 J of heat per cycle at its hot reservoir…

A: First, we use the relation between the efficiency and temperatures of hot and cold reservoirs to get…

Q: 10^9 J of heat is transferred into the engine, at a temperature of 575 K? (a) What is the work…

A:

Q: n one cycle a heat engine absorbs 460 J from a high-temperature reservoir and expels 310 J to a…

A: Efficiency of the engine ηh=1-QcQh55%ηcarnot=1-QcQh0.551-TlowThigh=1-QcQhTlowThigh=1-10.551-QcQh

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: