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: An engine absorbs 500 J of heat and rejects 100 J of heat to the cold reservoir in each cycle.  What…

A: Given : Qh = 500 J Qc = 100 J

Q: An Otto cycle with a compression ratio of 10.5 begins its compression at 90 kPa and 35C. The maximum…

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Q: Consider mixing some of the ice water with the hot water and vice versa so that the two reservoirs…

A: The process of mixing cold water with hot water and vice versa is irreversible.Entropy formation…

Q: What is the efficiency of a heat engine that uses an input heat of 6.70 x 104 J and rejects 3.28 x…

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Q: Calculate the Delta G value from the following data and state whether the process will be…

A: Temperature , T = 298 K  Change in entropy , ∆S = +9.50 J /K Heat of reaction ,∆H = -85 KJ To find =…

Q: A refrigerator operating on the reversed Carnot cycle has a measured work input of 200 kW and heat…

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Q: particular Carnot cycle has its exhaust temperature at 30.°C (303 K). During each cycle it takes in…

A: particular Carnot cycle has its exhaust temperature at 30.°C (303 K). During each cycle it takes in…

Q: A thermal cycle has an efficiency equal to 45.0 % of that a Carnot engine that operates between the…

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Q: The efficiency of a Carnot cycle is 1/5. If on reducing the temperature of the cold bodyby 55°C,…

A: Consider the initial temperature of the cycle be T1, and the final temperature of the cycle be T2.…

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: he thermal efficiency of a Carnot cycle operating between 170 ˚C and 62

A: Given:- A Carnot cycle operating between 170 ˚C and 620 ̊C Find:- The thermal efficiency of a Carnot…

Q: in each cycle a refrigerator absorbs heat of 3.4x10^4J from the cold reservoir. It has a coefficient…

A: Given Data: Heat extracted from the cold reservoir, Q2 = 3.4x104 J/cycle. Coefficient of performance…

Q: A steam engine absorbs 7.91×105J and expels4.99 × 105J in each cycle. Assume that all ofthe…

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Q: A heat engine is operating on a Carnot cycle and has a thermal efficiency of 55 percent. The waste…

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Q: Calculate the maximum possible efficiency of a heat engine that uses surface lake water at 20.7°C as…

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Q: The entropy of the working fluid of the ideal Carnot cycle (increases, decreases, remains the same)…

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Q: The energy transferred by heat from an engine during one cycle is 500 J. How much energy  must be…

A: The heat transferred or rejected from the engine is, QR=500 J   The efficiency, η=30%=0.30

Q: Which will give the greater improvement in the efficiency of a Carnot Engine, a 10 C° increase in…

A: let the temperature of high temperature reservoir be T and the temperature of low temperature…

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: would a 100% efficient engine violate the first law of thermodynamics? What about a workless…

A: would a 100% efficient engine violate the first law of thermodynamics? What about a workless…

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

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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 refrigerator removes heat from the freezing compartment at the rate of 20 kJ and ejects 24 kJ into…

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Q: If we want to increase the efficiency of a Carnot engine, should the temperature of the hot…

A: Carnot Cycle The most efficient heat engine cycle is the Carnot cycle that consists of two…

Q: A real (non-Carnot) heat engine, operating between heat reservoirs at temperatures of 524 and 287…

A: given data 2.4kJ of net work 3.6kJ of heat tempratures are 524k and 287k thermal efficiency = ?

Q: certain gasoline engine has an efficiency of 32.0%. What would the hot reservoir temperature (in °C)…

A: Given Temperature of sink = 2100 C = 210+273 = 483 K Efficiency = 32 %

Q: To increase the efficiency of a Carnot engine, should the temperature of the hot reservoir be raised…

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Q: A thermal cycle has an efficiency equal to 45.0 % of that a Carnot engine that operates between the…

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Q: How much work is done by a gasoline engine that is 20 % efficient and loses 750 J to the cooling…

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Q: Why do we study the reversed Carnot cycle even though it is not a realistic model for refrigeration…

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Q: if a heat engine works in a Carnot cycle, what happens to its efficiency when the difference in…

A: Given Heat engine works in a Carnot cycle Difference in temperature of hot reservoir and cold…

Q: How much energy (in Joules) must be supplied to the machine to achieve this ta Sol. Since the…

A: GivenTemperature of cold site ,TC=0°C=273 KTemperature of hot site ,TH=24°C=24+273=297 KMass of…

Q: A freezer sustains a cold environment of -26°C and exhausts its heat at 35°C. Assuming a Carnot…

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Q: Calculate the maximum possible efficiency of a heat engine that uses surface lake water at 20.7°C as…

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Q: During the isothermal heat addition process of a Carnot cycle, 900 kJ of heat is added to the…

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Q: A heat engine performs 411 J of work in each cycle and has an efficiency of 0.3. For each cycle, how…

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Q: The heat engine operates between temperatures of 320 K and 610 K. In one cycle, the machine takes…

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Q: An inventor claims to have devised a cyclic engine which exchanges heat with reservoirs 25ºC and…

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Q: In a single cycle, a heat engine extrac from a hot reservoir and exhausts 5.0 cold reservoir. What…

A: Given Data : Heat extracted by hot reservoirQh=8 Kcal Heat exhausted into cold reservoirQc=5 cal