FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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Carnot cycle operates between 30°C and 350°C. Find the cycle efficiency.
Steam at 5.2 MPa, 4000C expands in a Rankine turbine to 0.036MPa. For 136 kg/s of steam, determine the work, the thermal efficiency, and the steam rate (a) fot the cycle(b) for the turbine, (c) for an actual turbine with the same specifications, the brake steam rate is 4.80 kg/kwh ang the driven electric generator has an efficiency of 93%, Find brake thermal efficiency , brake engine efficiency, combined work, and quality or temperature of exhaust steam.
Don't answer the given problem, just give me the schematic diagram and T-S diagram of the given problem
The efficiency of Carnot cycle operating at a maximum temperature of 460 oF is 50 %. Find the minimum temperature of the cycle.
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- 9 In a constant temperature, transferred to the working fluid at 80F. What is the change of entropy of the working fluid, KJ/kg-K? closed system process, 120 BTU of heat is 10 1ne in -rease of certain is 141 KJ/ka when the gasarrow_forwardGiven the p-V diagram of a Carnot engine, 1 T, = 530°C P 4 3 T, = 220°C Q. = 2900 Joules V Find the heat absorbed and the work done by the heat engine in Joules. 2.arrow_forwardSU-2 A gas at 500K is in a cylinder with a frictionless piston. The gas goes thru a reversible cycle during which it absorbs 400J from a reservoir at 500K. During part of the cycle the gas rejects heat Q to a reseroir at 300K. Let the system be defined as the gas. a) What is the change in entropy for the system for one cycle of operation of the engine? Briefly explain your answer. b) Find the change in entropy for the universe for one cycle of operation of the engine. Briefly explain your answer. c) Find the change in entropy for the surroundings for one cycle of operation of the engine. Briefly explain your answer. d) Use your results from the previous parts to find how many joules of heat were rejected to the 300K reservoir during this process.arrow_forward
- A geothermal power plant uses earth steam at 400 K and cooling water at 300 K.a. What is the value of maximum efficiency? b. Suppose the actual efficiency is 18% and the plant generates electricity at the rate of 200MW. How much work is lost each day? c. How much entropy is created each day?arrow_forwardAn Otto cycle has a heat rejected of 300 kJ and work of 700 kJ. Find the cycle efficiency. ANSWER : 70%arrow_forwardMay you please explain each steps. Thank youarrow_forward
- 6. A Reversed Carnot Cycle rejects 833 BTU/lb as heat at a temperature of 1140F. The cycle receives heat at a temperature of 140F. Calculate: a. The change of entropy for the heat rejection process, BTU/lb-R b. The net cycle work in BTU/lbarrow_forwardDon't answer the given problem, just give me the schematic diagram and t-s diagram of the given problemarrow_forwardT = 300 K and T A gas turbine plant operates on the Brayton cycle between 1073 K. Find the maximum work done per kg of air, and the corresponding cycle efficiency. How does this efficiency compare with the Carnot cycle efficiency operating between the same two temperatures? min maxarrow_forward
- Two Carnot engines work in series between source and sink temperature of 04 1200K and 300K. Find out the intermediate temperature if 1) Both engines having same efficiency 2) Both engines develop equal power.arrow_forwardHow do I do this questions in steps? Stuggling with how to find the isentropic work for the efficiency of the turbine. Please have written out or neat solutions that arent copied and pasted math.arrow_forwardfind the specific enthalphy at each point of the cycle, the amount of heat added, heat rejected, turbine work, pump work, net work and thermal efficiency in a carnot cycle between pressure limits of 3MPa and 10KPaarrow_forward
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