Determine the thermal efficiency of the cycle.
Q: Water is used as the working fluid in an ideal Rankine cycle. Saturated liquid enters the pump with…
A:
Q: Derive the MEP for dual cycle in terms of P1, rk, rp, k, and e.
A: Dual cycle P1 = pressure rK = compression ratio rp = pressure ratio rc = cutoff ratio k = specific…
Q: ) the maximum temperature of the cycle, in K. ) the net work, in kJ/kg. ) the percent thermal…
A: Given: Otto cycle P1=1 bar T1=300 K Qin=1400 kJ/kg Compression ratio=3.5 To determine:
Q: determine the thermal efficiency of the cycle, in %.
A:
Q: What is an adiabatic and an isothermal in thermodynamic cycle
A: Thermodynamic cycles are processes in which state of matter changes from one state to another.
Q: The Carnot engine runs on an air standard cycle with a temperature differential of 4250 degrees…
A: As there is no information about lower temperature so we can assume lower temperature as surrounding…
Q: Evaluate the performance of gas power cycles for which the working fluid remains a gas throughout…
A: The gas power cycle deals with a system whose working fluid remain in the gaseous stare throughout…
Q: The thermal efficiency of a heat engine operating according to the Carnot cycle is 28% and water…
A:
Q: For Carnot Cycle: Thermal efficiency= 1
A: Draw the T-s diagram of the Carnot cycle.
Q: Determine the efficiency of an ideal Rankine cycle if the pressure and the temperature before the…
A:
Q: Determine for the cycle: a) the mass fraction of steam diverted to the closed heater after the first…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub parts for…
Q: What is the effect of percentage change in the efficiency of Otto cycle having a compression ratio…
A: Given Data: The compression ratio of Otto cycle is, r=7. The increase in specific heat at constant…
Q: A steady-flow Carnot cycle uses water as the working fluid. Water changes from saturated liquid to…
A: Carnot cycle: The Carnot cycle is a ideal thermodynamic cycle proposed by French scientist Nicolas…
Q: An ideal Ericsson engine using helium as the working fluid operates between temperature limits of…
A: Given: The lower temperature of the ideal Ericsson engine is T2 =550 R. The higher temperature of…
Q: Pump Q2/ Choose the Correct Answer: 1. Rankine cycle efficiency of a good steam power plant may be…
A: As per given question We have to choose correct options
Q: What cycle is composed of two isothermal and two constant-volume processes?
A: Stirling cycle has two isothermal and two constant volume processes. This is a modified Carnot…
Q: In a standard Brayton cycle, the maximum temperature is 1,473 K while the minimum temperature is 307…
A: Given Data Tmax=1473 K Tmin=307 K qin= 1074 kJ/kg
Q: compression ratio influences the efficiency of this cycle with at least three points.
A:
Q: Determine work output of the engine, for the reversible cycle
A:
Q: An ideal diesel engine uses air as the working fluid. The state of the air at the beginning of the…
A: (a) To find: The thermal efficiency of the ideal diesel cycle. Given: The initial pressure is P1=95…
Q: Show the cycle on a T-s diagram. If the mass flow rate is 10 kg/s, determine (b) the thermal…
A:
Q: Describe the four processes which make up the ideal Brayton cycle.
A: Brayton Cycle is a type of power producing cycle used in the gas power plant. It has mainly four…
Q: The compression ratio of an engine working on the constant volume cycle is 9.3. At the beginning of…
A: Data given- r = 9.3 T1 = 31°C = 304 K T3 = 1205°C = 1478 K K = 1.4
Q: 5 The efficiency of a Carnot Cycle can be determined using only the hot and cool temperature True…
A: Different cycles used in thermodynamics are: Carnot cycle Rankine cycle Brayton cycle Otto cycle…
Q: What are the disadvantages of a Regenerative Rankine Cycle?
A:
Q: Define the second-law efficiency.
A: Second law efficiency is defined as the ratio of the actual efficiency to the Carnot cycle…
Q: Determine the efficiency of a constant volume cycle with expansion ratio equal to 7.8.
A:
Q: explain the derivation of heat from the regenerator of the Stirling cycle
A:
Q: Show that the thermal efficiency of the Dual power cycle is: Tn(r.)Y – 1 -
A:
Q: Q12. The temperature limits through a heat engine cycle are 300 °C and 50 °C and the heat rejected…
A:
Q: For a pressure ratio of r, specific heat ratio of y. the thermal efficiency of Brayton cycle is…
A: Given pressure ratio=rp, Specific heat ratio=γ
Q: An air-standard power cycle with constant specific heats is executed in a closed system and is…
A: The air standard cycle is an ideal cycle that uses air as the working medium. The air acts as an…
Q: 2-a Explain the effect of pressure ratio on the net work and the efficiency of a steam power cycle.
A: To determine: Effect of pressure ratio on Wnet and ηcycle of steam power plant
Q: 2. The maximum thermal efficiency possible for a power cycle operating between 1200°F and 225°F is:…
A:
Q: Which one of the following modifications of the simple ideal Rankine cycle
A: Given; For the given following statements, Simple ideal Rankine cycle increses the thermal…
Q: A Carnot cycle works between a cold reservoir at a temperature of 113 °C and a hot reservoir at a…
A:
Q: 95 kPa and 20°C. If the maximum temperature in the cycle is not to exceed 2200 K, determine (a) the…
A: Calculated thermal efficiency
Q: Explain Coal-fired power plant?
A: Coal-fired power plants :They are thermal energy based power plants, which produce electricity by…
Q: 3. Show that the thermal efficiency of the Carnct cycle in terms of the isentropic compression ratio…
A: ηcarnot=1-T1T2 rk=V1V2
Q: Describe the Carnot cycle.
A: Carnot cycle is an ideal reversible cycle having ideal gas the working fluid. This is not a…
Q: In a reversible heat engine operating in a cycle between a source temperature of 606°C and a sink…
A: T1=606°C=606+273.15 K=879.15 KT2=20°C=20+273.15 K=293.15 K QInput=1 kJ
Q: How does the ideal Ericsson cycle differ from the Carnot cycle?
A: Ideal Ericsson cycle Ericsson cycle consists of four processes which are as follows- Isothermal…
Q: 3. What are the four major accessories of a Rankine Cycle? Define each.
A: Four major accessories of a Rankine cycle- 1. Boiler 2. Turbine 3. Condenser 4. Pump
Q: If the efficiencies of a power plant, turbine and generator (in the power plant) are 0.36, 0.5 and…
A:
Q: A simple Brayton cycle using air as the working fluid has a pressure ratio of 10. The minimum and…
A:
Q: Determine the cycle thermal efficiency. Obtain the expression for the cycle thermal efficiency as a…
A: Thermal efficiency is defined as the ratio of net amount of work developed from a thermodynamic…
Step by step
Solved in 2 steps with 2 images
- In an ideal reheat cycle, the steam throttled condition is 8 MPa and 480 degree C. the steam is then reheated to MPa and 460 degree C. the turbine exhaust is 60 degree C. The required values of some state point properties are tabulated below. Determine the enthalpy of steam entering the reheater.A steam power plant operates on the simple ideal Rankine cycle. The steam enters the turbine at 4 MPa and 500°C and is condensed in the condenser at a temperature of 40°C. draw and label the schematic diagram and the pV and TS planes. (a) Show the cycle on a T-s diagram. If the mass flow rate is 10 kg/s, determine (b) the thermal efficiency of the cycle (c) the net power output in kW.A binary vapor power cycle consists of two ideal Rankine cycles with steam and Refrigerant 134a as the working fluids. The mass flow rate of steam is 2 kg/s. In the steam cycle, superheated vapor enters the turbine at 8 MPa, 600C, and saturated liquid exits the condenser at 250 kPa. In the interconnecting heat exchanger, energy rejected by heat transfer from the steam cycle is provided to the Refrigerant 134a cycle. The heat exchanger experiences no stray heat transfer with its surroundings. Superheated Refrigerant 134a leaves the heat exchanger at 600 kPa, 30C, which enters the Refrigerant 134a turbine. Saturated liquid leaves the Refrigerant 134a condenser at 100 kPa. Determine (a) The net power developed by the binary cycle, in kW. (b) The rate of heat addition to the binary cycle, in kW. (c) The thermal efficiency of the binary cycle.
- In an ideal Reheat cycle , the steam throttled condition is 7 Mpa and 460 C. The steam is then reheated to 1.5 MpA and 460 C . If turbine exhaust is 50 C ,determine the following: A.) Quality after turbine expansion B.) Turbine work C.) Heat added in the boiler D.) Heat rejected from the condenser E.) Pump work F.) Net work G.) Cycle efficiencyIn a reheat cycle steam at 15 MPa, 540°C enters the engine and expands to 1.95 MPa. At this point the steam is withdrawn and passed through a reheater. It reenters the engineat 540°C. Expansion now occurs to the condenser pressure of 0.0035 MPa. (a) A 60,000 kw turbine operates between the same state points except that the steam enters the reheater at 1.95 MPa and 260°C, departs at 1.8 MPa and 540°C. The steam flow is 147,000 kg/hr, generator efficiency is 96%. For actual engine, find, ek, mk, and nk, (b) Determine the approximate enthalpy of the exhaust steam if the heat lost through the turbine casing is 2% of the combined work.Steam is the working fluid in an actual Rankine cycle. Steam enters the turbine at 8.0 MPa and 550 deg. C; and saturated liquid exits the condenser at a pressure of 0.008 MPa. The net power output of the cycle is 110 MW. The turbine and the pump each have an isentropic efficiency of 83% Illustrate and label the TS diagram and determine the cycle (a) the cycle thermal efficiency (b) the back work ratio (c)the mass flow rate of the steam, in kg/h, (d) the rate of heat transfer into the working fluid as it passes through the boiler, in MW, (e) the rate of heat transfer, from the condensing steam, as it passes through the condenser, in MW, (f) the mass flow rate of the condenser cooling water, in kg/hr., if cooling water enters the condenser at 15 deg. C and exits at 35 deg. C.
- 17. In a reheat cycle with one stage of reheat, the steam leaving the high-pressure turbine is reheated before it enters the low-pressure turbine. For the ideal cycle, the heat input in the boiler is 895 kW, the high-pressure turbine work output is 143 kW, the low-pressure turbine work output is 338 kW, and the input work to the pump is 15 kW. If the efficiency of the ideal reheat cycle is 42.3%, what is the heat transfer in the condenser? Express your answer in kW.Question 4 a) A power plant based on the ideal Rankine cycle has a net power output of 10 MW.Superheated steam enters the turbine at 10 MPa, 500 (Degree)C. The condenser pressure is 15 kPa.Determine:i) the mass flow rate of the steam.ii) the rate of heat input to the cycle.iii) the thermal efficiency.Steam enters the first turbine stage of a vapor power cycle with reheat and regeneration at 15 MPa, 500 0C, and expands to 2 MPa. A portion of the flow is diverted to a closed feedwater heater at 2 MPa, and the remainder is reheated to 500 0C before entering the second turbine stage. Expansion through the second turbine stage occurs to 1 MPa, where another portion of the flow is diverted to a second closed feedwater heater at 1 MPa. The remainder of the flow expands through the third turbine stage to 0.10 MPa, where a portion of the flow is diverted to an open feedwater heater operating at 0.10 MPa, and the rest expands through the fourth turbine stage to the condenser pressure of 10 kPa. Condensate leaves each closed feedwater heater as saturated liquid at the respective extraction pressure. The feedwater streams leave each closed feedwater heater at a temperature equal to the saturation temperature at the respective extraction pressure. The condensate streams from the closed heaters…
- A binary vapor power cycle consists of two ideal Rankine cycles with steam and Refrigerant 134a as the working fluids. The mass flow rate of steam is 2 kg/s. In the steam cycle, superheated vapor enters the turbine at 8 MPa, 560°C, and saturated liquid exits the condenser at 50 kPa. In the interconnecting heat exchanger, energy rejected by heat transfer from the steam cycle is provided to the Refrigerant 134a cycle. The heat exchanger experiences no stray heat transfer with its surroundings. Superheated Refrigerant 134a leaves the heat exchanger at 600 kPa, 30°C, which enters the Refrigerant 134a turbine. Saturated liquid leaves the Refrigerant 134a condenser at 100 kPa.Determine:(a) the net power developed by the binary cycle, in kW.(b) the rate of heat addition to the binary cycle, in kW.(c) the percent thermal efficiency of the binary cycle.(d) the rate of entropy production in the interconnecting heat exchanger, in kW/K.Question 4 a) A power plant based on the ideal Rankine cycle has a net power output of 10 MW.Superheated steam enters the turbine at 10 MPa, 500 C. The condenser pressure is 15 kPa.Determine:i) the mass flow rate of the steam.ii) the rate of heat input to the cycle.iii) the thermal efficiency.(Reheatcycle) An ideal reheat Rankine cycle with water as the working fluid operates the boiler at 15,000 kPa, the reheater at 2000 kPa, and the condenser at 100 kPa. The temperature is 450C at the entrance of the high-pressure and low-pressure turbines. The mass flow rate through the cycle is1.74 kg/s. Determine the (a) power used by pumps, (b) the power produced by the cycle, (c) the rate of heat transfer in the reheater,(d) and the thermal efficiency of this system.