In a cogeneration system, a Rankine cycle operates with steam entering the turbine at 800 lb/in.2, 700°F, and a condenser pressure of 180 lb/in.² The isentropic turbine efficiency is 80%. Energy rejected by the condensing steam is transferred to a separate process stream of water entering at 250°F, 140 lb/in.² and exiting as saturated vapor at 140 lb/in.2 The mass flow rate of the process stream is 51,000 lb/h. Let To = 70°F, Po = 14.7 lb/in.² Step 1 Determine the mass flow rate for the working fluid of the Rankine cycle, in lb/h. mcycle = 56880.22 Your answer is correct. Hint Step 2 W Determine the net power output for the cycle, in Btu/h. cycle lb/h i Btu/h Attempts: 2 of 4 used

In a cogeneration system, a Rankine cycle operates with steam entering the turbine at 800 lb/in.2, 700°F, and a condenser pressure of 180 lb/in.² The isentropic turbine efficiency is 80%. Energy rejected by the condensing steam is transferred to a separate process stream of water entering at 250°F, 140 lb/in.² and exiting as saturated vapor at 140 lb/in.2 The mass flow rate of the process stream is 51,000 lb/h. Let To = 70°F, Po = 14.7 lb/in.² Step 1 Determine the mass flow rate for the working fluid of the Rankine cycle, in lb/h. mcycle = 56880.22 Your answer is correct. Hint Step 2 W Determine the net power output for the cycle, in Btu/h. cycle lb/h i Btu/h Attempts: 2 of 4 used

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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In a cogeneration system, a Rankine cycle operates with steam entering the turbine at 800 lb/in.², 700°F, and a condenser pressure of 180 lb/in.² The isentropic turbine efficiency is 90%. Energy rejected by the condensing steam is transferred to a separate process stream of water entering at 250°F, 140 lb/in.2 and exiting as saturated vapor at 140 lb/in.2 The mass flow rate of the process stream is 48,000 lb/h. Let To -70°F, po - 14.7 lb//in.² Step 1 Determine the mass flow rate for the working fluid of the Rankine cycle, in lb/h. mcycle Step 2 Hint W Your answer is correct. cycle = 54852.5 Determine the net power output for the cycle, in Btu/h. Hint Step 3 Your answer is correct. 7087421.984 € = i lb/h eTextbook and Media Save for Later Btu/h Evaluate an exergetic efficiency for the overall cogeneration system. The exergetic efficiency is defined as the net rate of exergy output divided by the net rate of exergy input. Attempts: 1 of 4 used % Attempts: 2 of 4 used Attempts: 0 of 4…
In a cogeneration system, a Rankine cycle operates with steam entering the turbine at 800 lb-/in.2, 700°F, and a condenser pressure of 180 lb/in.² The isentropic turbine efficiency is 80%. Energy rejected by the condensing steam is transferred to a separate process stream of water entering at 250°F, 140 lb-/in.² and exiting as saturated vapor at 140 lb/in.² The mass flow rate of the process stream is 48,000 lb/h. Let To = 70°F, po = 14.7 lb//in.² Step 1 * Your answer is incorrect. Determine the mass flow rate for the working fluid of the Rankine cycle, in lb/h. mcycle = Hint i Save for Later 54649.6 lb/h Attempts: 2 of 4 used Step 2 The parts of this question must be completed in order. This part will be available when you complete the part above. Step 3 The parts of this question must be completed in order. This part will be available when you complete the part above. Submit Answer
In a cogeneration system, a Rankine cycle operates with steam entering the turbine at 800 lb-/in.², 700°F, and a condenser pressure of 180 lb-/in.² The isentropic turbine efficiency is 70%. Energy rejected by the condensing steam is transferred to a separate process stream of water entering at 250°F, 140 lb/in.² and exiting as saturated vapor at 140 lb/in.² The mass flow rate of the process stream is 51,000 lb/h. Let To = 70°F, po = 14.7 lb-/in.² Determine the mass flow rate for the working fluid of the Rankine cycle, in lb/h. mcycle = W cycle 56429.05 Determine the net power output for the cycle, in Btu/h. = lb/h Mi ! Btu/h
In a cogeneration system, a Rankine cycle operates with steam entering the turbine at 800 lbf/in.2, 700°F, and a condenser pressure of 180 lbf/in.2 The isentropic turbine efficiency is 80%. Energy rejected by the condensing steam is transferred to a separate process stream of water entering at 250°F, 140 lbf/in.2 and exiting as saturated vapor at 140 lbf/in.2 The mass flow rate of the process stream is 50,000 lb/h. Let T0 = 70°F, p0 = 14.7 lbf/in.2
In a cogeneration system, a Rankine cycle operates with steam entering the turbine at 800 lbf/in.2, 700°F, and a condenser pressure of 180 lbf/in.² The isentropic turbine efficiency is 70%. Energy rejected by the condensing steam is transferred to a separate process stream of water entering at 250°F, 140 lbf/in.2 and exiting as saturated vapor at 140 lbf/in.2 The mass flow rate of the process stream is 49,000 lb/h. Let To = 70°F, po = 14.7 lbf/in.²
A binary-vapor cycle operates on mercury and steam. Saturated mercury vapor at 6 bar is supplied to the mercury turbine, from which it exhaust at 0.08 bar. The mercury condenser generates saturated steam at 20 bar which is expanded in a steam turbine to 0.04 bar. (i) Find the overall efficiency of the cycle. (ii) If 50000 kg/h of steam flows through the steam turbine, what is the flow through the mercury turbine? (iii) Assuming that all processes are reversible, what is the useful work done in the binary vapor cycle for the specified steam flow? (iv) If the steam leaving the mercury condenser is superheated to a temperature of 300°C in a superheater located in the mercury boiler, and if the internal efficiencies of the mercury and steam turbines are 0.85 and 0.87 respectively, calculate the overall efficiency of the cycle. The properties of mercury are given below. P bar t°C hf (kJ/kg) hg (kl/kg) Sf (kJ/kg K) Sg (kJ/kg vf (m3/kg) K) vg (m3/kg) 6 480 68.75 359.65 0.1384 0.5327 79.9x10-6…
In a cogeneration system, a Rankine cycle operates with steam entering the turbine at 800 lbf/in.²2, 700°F, and a condenser pressure of 180 lb/in.² The isentropic turbine efficiency is 70%. Energy rejected by the condensing steam is transferred to a separate process stream of water entering at 250°F, 140 lb/in.² and exiting as saturated vapor at 140 lbf/in.² The mass flow rate of the process stream is 51,000 lb/h. Let To = 70°F, po = 14.7 lb//in.² Determine the mass flow rate for the working fluid of the Rankine cycle, in lb/h. mcycle = i lb/h
A binary vapour cycle operates on mercury and steam. Standard mercury vapour at 4.5 bar is supplied to the mercury turbine, from which it exhausts at 0.04 bar. The mercury condenser generates saturated steam at 15 bar which is expanded in a steam turbine to0.04 bar.(i) Determine the overall efficiency of the cycle.(ii) If 48000 kg/h of steam flows through the steam turbine, what is the flow through themercury turbine ?(iii) Assuming that all processes are reversible, what is the useful work done in the binaryvapour cycle for the specified steam flow ?(iv) If the steam leaving the mercury
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
1. Determine the Rankine efficiency of a condensing steam turbine operating in a Rankine cycle as follows: Steam pressure - 200 psiaSteam temperature - 1000 FExhaust pressure - 2 in Hg absoluteSteam rate - 1.5 lb/kW-hr 2. If the no. 1 problem has a thermal efficiency of 30%, how many barrels of 30 °API fuel oil will be required to produce 1000 kW-hr of power. Neglect the pump work.
4. Superheated steam at 18 MPa, 560°C, enters the turbine of a vapor power plant. The pressure at the exit of the turbine is 0.06 bar, and saturated liquid leaves the condenser at 0.06 bar. The pressure is then increased by a pump to the boiler pressure at 18 MPa. The turbine and pump efficiencies are 82 and 77%, respectively. For the cycle, determine (a) The net-work per unit mass of steam flow, in kJ/kg (b) Heat transfer to steam passing through the boiler, in kJ/kg (c) The thermal efficiency of the cycle (d) Heat transfer to cooling water passing through the condenser, in kJ/kg. (e) Draw complete T-s diagram
A simple Rankine cycle uses water as the working fluid. Water enters the pump as a saturated liquid at 10 kPa and exits at a pressure of 5 MPa. Water enters the condenser as a saturated mixture with a quality of 90%. Assume that the cycle is ideal. 1. What is the temperature of the turbine inlet, in °C? Report your result to one decimal place using rounding. 2. How much heat was added in the boiler, in kJ/kg. Round to the nearest whole number. 3. How much heat was removed in the condenser? Round your answer to the nearest whole number. 4. What is the net work produced, in kJ/kg. Round your answer to the nearest whole number.