Problem 8.051 SI A binary vapor power cycle consists of two ideal Rankine cycles with steam...
Problem 8.051 SI 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, 600°C, 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, 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.
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Problem 8.051 SI A binary vapor power cycle consists of two
ideal Rankine cycles with steam...
Problem #2 (30 The steam cycle described in Problem #1 wasted a significant amount of exergy to t...
Problem #2 (30 The steam cycle described in Problem #1 wasted a significant amount of exergy to the cooling water. A real cycle might cascade the energy down to a lower temperature cycle to utilise some of this exergy (regeneration). It might also use the heat to execute an industrial process (cogeneration). The cycle described below does both! inSeam generator Turbine 1.5 bar H20 cycle To industrial process H2OR-134a heat exchanger Turbine Refrigerant cycle R-134a cycle Pump Condenser Pump Return...
Tutorial Questions 1 1. Water is the working fluid in an ideal Rankine cycle. The condenser...
Tutorial Questions 1.1. Water is the working fluid in an ideal Rankine cycle. The condenser pressure is kPa, and saturated vapor enters the turbine at 10 MPa. Determine the heat transfer rates, in kJ per kg of steam flowing, for the working fluid passing through the boiler and condenser and calculate the thermal efficiency.2. Water is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 16 MPa, and the condenser pressure is 8 kPa ....
Water is the working fluid in a Rankine cycle. Superheated vapor enters the turbine at 8...
Water is the working fluid in a Rankine cycle. Superheated vapor enters the turbine at 8 MPa, 700°C and the turbine exit pressure is 8 kPa. Saturated liquid enters the pump at 8 kPa. The heat transfer rate to the working fluid in the steam generator is 24 MW. The isentropic turbine efficiency is 88%, and the isentropic pump efficiency is 82%. Cooling water enters the condenser at 18°C and exits at 36°C with no significant change in pressure. Determine...
Steam is the working fluid in a simple, ideal Rankine cycle. Saturated vapor enters the turbine...
Steam is the working fluid in a simple, ideal Rankine cycle. Saturated vapor enters the turbine at 8 MPa and saturated liquid exits the condenser at a pressure of 8 kPa. The net power output of the cycle is 100 MW. Determine for the cycle: i. Thermal efficiency ii. Back work ratio iii. Mass flow-rate of the steam in kg/h iv. Rate of heat transfer to the working fluid as it passes through the boiler in MW v. Rate of...
(30 points) Rankine Cycle An ideal Rankine cycle has a turbine power output of 4 MW....
(30 points) Rankine Cycle An ideal Rankine cycle has a turbine power output of 4 MW. Saturated liquid at 20 kPa leaves the condenser, and the vapor at the exit to the isentropic turbine has a quality of 95 percent. The boiler pressure is 1.4 MPa. a. Find the mass flow rate of the steam (kg/s) b. What is the heat transfer into the boiler? c. What is the thermal efficiency for this cycle? Condenser
Water is the working fluid in a Rankine cycle. Superheated vapor enters the turbine at 10...
Water is the working fluid in a Rankine cycle. Superheated vapor enters the turbine at 10 Mpa, 560 C with a mass flow rate of 7.8kg/s and exits at 8 kPa. Saturated liquid enters the pump at 8 kPa. The isentropic turbine efficiency is 85%, and the isentropic pump efficiency is 85%. Cooling water enters the adiabatic condenser at 18 C and exits at 36 C with no significant change in pressure and assuming the specific heat of the cooling...
Water is the working fluid in an ideal Rankine cycle with reheat. Superheated vapor enters...
Water is the working fluid in an ideal Rankine cycle with reheat. Superheated vapor enters the turbine at 8 MPa, 480℃, and the condenser pressure is 8 kPa. Steam expands through the first stage turbine to 700 kPa and then is reheated to 480℃. Assumptions: see problem 1 . Determine for the cycle(a) the rate of heat addition, in kJ per kg to the working fluid in the steam generator.(b) the thermal efficiency.(c) the rate of heat transfer from the...
(2) Steam generated in a Rankine steam power cycle at a pressure of 8 MPa and...
(2) Steam generated in a Rankine steam power cycle at a pressure of 8 MPa and temperature 600°C is fed to a turbine. Exhaust from the turbine enters a condenser at 100 kPa, where it is condensed to saturated liquid, which is then pumped to the boiler. (a) (20 pts.) What is the thermal efficiency n of an ideal Rankine cycle operating at these conditions? (b) (5 pts.) If the net power production of the cycle is 80,000 kW, what...
Consider a steam power plant that operates on a reheat Rankine cycle and has a net...
Consider a steam power plant that operates on a reheat Rankine cycle and has a net power output of 80 MW. Steam enters the high-pressure turbine at 10 MPa and 550°C and the low-pressure turbine at 1 MPa and 550°C. Steam leaves the condenser as a saturated liquid at a pressure of 10 kPa. The isentropic efficiency of the turbine is 80 percent, and that of the pump is 95 percent. Show the cycle on a T-s diagram with respect...
Consider a steam power plant that operates on a reheat Rankine cycle and has a net...
Consider a steam power plant that operates on a reheat Rankine cycle and has a net power output of 80 MW. Steam enters the high-pressure turbine at 10 MPa and 500°C and the low-pressure turbine at 1 MPa and 500°C. Steam leaves the condenser as a saturated liquid at a pressure of 10 kPa. The isentropic efficiency of the turbine is 74 percent and that of the pump is 95 percent. Determine the quality (or temperature, if superheated) of the...
Problem #2 (30 The steam cycle described in Problem #1 wasted a significant amount of exergy to the cooling water. A real cycle might cascade the energy down to a lower temperature cycle to utilise some of this exergy (regeneration). It might also use the heat to execute an industrial process (cogeneration). The cycle described below does both! inSeam generator Turbine 1.5 bar H20 cycle To industrial process H2OR-134a heat exchanger Turbine Refrigerant cycle R-134a cycle Pump Condenser Pump Return...
(30 points) Rankine Cycle An ideal Rankine cycle has a turbine power output of 4 MW. Saturated liquid at 20 kPa leaves the condenser, and the vapor at the exit to the isentropic turbine has a quality of 95 percent. The boiler pressure is 1.4 MPa. a. Find the mass flow rate of the steam (kg/s) b. What is the heat transfer into the boiler? c. What is the thermal efficiency for this cycle? Condenser
(2) Steam generated in a Rankine steam power cycle at a pressure of 8 MPa and temperature 600°C is fed to a turbine. Exhaust from the turbine enters a condenser at 100 kPa, where it is condensed to saturated liquid, which is then pumped to the boiler. (a) (20 pts.) What is the thermal efficiency n of an ideal Rankine cycle operating at these conditions? (b) (5 pts.) If the net power production of the cycle is 80,000 kW, what...
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