FUND OF ENG THERMODYN(LLF)+WILEYPLUS
9th Edition
ISBN: 9781119391777
Author: MORAN
Publisher: WILEY
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A Rankine cycle is characterized by turbine inlet conditions of 1500 psia and 1000F. The condenser pressure is 1 psia. The heat transfer to the steam in the boiler occurs at the rate of 7x 106 Btu/sec. The cooling water in the condenser increases in temperature from 70° to 85°F. Determine the following:
1. the net power produced, the cooling-water flow rate in gal/min and the cycle thermal efficiency.
8.4 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. The mass flow rate of steam
entering the turbine is 120 kg/s. Determine
a. the net power developed, in kW. 1.112 × 105
b. the rate of heat transfer to the steam passing through the boiler, in kW. 2.869 ×
105
c. the thermal efficiency. 38.8%
d. the mass flow rate of condenser cooling water, in kg/s, if the cooling water
undergoes a temperature increase of 18°C with negligible pressure change in passing
through the condenser. 2335
Water is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at
6.9 MPa. The condenser pressure is 6.9 kPa.draw and label the schematic diagram and
the pV and TS planes. Determine
(a) the net work per unit mass of steam flow in kJ/kg
(b) the heat transfer to the steam passing through the boiler in kJ/kg,
(c) the thermal efficiency
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- 4. in an ideal Rankine cycle, water is the working fluid. Saturated vapor enters the turbine at 6.9 MPa. The condenser pressure is 6.9 kPa. Determine (a) the net work per unit mass of steam flow in kJ/kg. (b) the heat transfer to the steam passing through the boiler in kJ/kg, Draw the schematic and Ts diagram.arrow_forwardThe condensing pressure for a Rankine engine is 1 bar (hf= 417.4 kJ/kg). Calculate the net work for 1 kg/s of steam and the thermal efficiency when the steam at the beginning of expansion is at 50 bar and (a) saturated (b) 350°C and (c) 640°C. Note the variation of efficiency and the quality at the end of the expansion.arrow_forward3. Steam is the working fluid in an ideal Rankine cycle. The saturated vapor enters the turbine at 8.0 MPa and saturated liquid exits the condenser at a pressure of 0.008 MPa. The net power output of the cycle is 100 MW. Determine for the cycle (a) the thermal efficiency, (b) the mass flow rate of the steam, in kg/h, (c) the rate of heat transfer, into the working fluid as it passes through the boiler, in MW, (d) the rate of heat transfer, from the condensing steam as it passes through the condenser, in MW, (e) the mass flow rate of the condenser cooling water, in kg/ h, if cooling water enters the condenser at 15°C and exits at 35°C.arrow_forward
- Water is the working fluid in a Carnot vapor power cycle. Saturated liquid enters the boiler at 16 MPa, and saturated vapor enters the turbine. The condenser pressure is 8 kPa. The mass flow rate of steam entering the turbine is 120 kg / s. (a) Determine the thermal efficiency: (b) Determine the net power developed, in kW: kW (c) Determine the rate of heat transfer from the working fluid passing through the condenser, in kW: kWarrow_forwardConsider an ideal Rankine cycle. Water exits the condenser at a pressure of 0.08 bar and a flow rate of 30 kg/s. Saturated steam exits the boiler at a pressure of 150 bar. Determine: (a) the net power developed by the power plant, in kW. (b) the rate of heat transfer in the boiler, in kW. (c) the thermal efficiency of the cycle.arrow_forwardWater is the working fluid in an ideal Rankine cycle. The superheated vapor enters the turbine at 8 MPa, 480°C. The condenser pressure is 8 kPa. The net power output of the cycle is 100 MW. Determine for the cycle (a) the rate of heat transfer to the working fluid passing through the steam generator, in kW. (b) the thermal efficiency. (c) the mass flow rate of condenser cooling water, in kg/h, if the cooling water enters the condenser at 15°C and exits at 35°C with negligible pressure change. Provide a schematic diagram and T/S diagram. Note: please provide a concise working solution with complete reasonings. Thank you so much, I will give a like immediately if the request is done.arrow_forward
- An ideal Rankine cycle operates between the pressure limits of 15,000 kPa in the boiler and 15 kPa in the condenser. If the turbine inlet temperature is 500 deg C and the cycle produces 2500 kW of net work, determine the mass flow rate of the steam in kg/s. Refer to the tables below. a. 1.993 b. 2.122 c. 1.856 d. 2.016arrow_forwardWater is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 18 MPa. The condenser pressure is 6 kPa. Determine (a) the net work per unit mass of steam flowing, in kJ/kg, (b) the heat transfer to the steam passing through the boiler in kJ/ kg of steam flowing, (c) the thermal efficiency, (d) the heat transfer to cooling water passing through the condenser, in kJ/ kg of steam condensed.arrow_forwardSheet 2 1. 1.5-Steam is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 8 MPa and saturated liquid exits the condenser at a pressure of 0.008 MPa. The net power output of the cycle is 100 MW. Determine: • The thermal efficiency (Ans. 37.1%) • The back work ratio (Ans. 0.84%) • The mass flow rate of the steam in kg/h (Ans. 3.77 x 105 kg/h) • The rate of heat transfer, Qin in MW (Ans. 269.77 MW) • The mass flow rate of condenser cooling water, in kg/h, if the cooling water enters the condenser at 25°C and exits at 35°C. (Ans. 14.27x106 kg/h)arrow_forward
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