Supposedly you are a cadet engineer in a certain steam power plant that employ a reheat-regenerative ideal Rankine cycle. You are told that it will utilized one open feed heater (OFH). The condition are as follows: Steam is supplied with a condition of 2175.57 psia and 1112 °F. Also, it was measured that condenser pressure is 10 kPa. It was also observed that there are some steam is extracted from the turbine at 40 bar for closed feed water heater while the unextracted steam is reduced at 4000 kPa to 600°C. You are also reminded that the extracted steam is totally liquified in this closed feed water heater and then is pumped to 150 bar before joining with the feed water heater. Note that steam for the open feed water heater is bled from L.P. turbine at 5 bar. Determine : (i) Determine the amount of steam fraction that was extracted from the turbines (at each bled heater) (ii) What is the thermal efficiency of the system. (ii) Provide the process diagram for this problem.

Supposedly you are a cadet engineer in a certain steam power plant that employ a reheat-regenerative ideal Rankine cycle. You are told that it will utilized one open feed heater (OFH). The condition are as follows: Steam is supplied with a condition of 2175.57 psia and 1112 °F. Also, it was measured that condenser pressure is 10 kPa. It was also observed that there are some steam is extracted from the turbine at 40 bar for closed feed water heater while the unextracted steam is reduced at 4000 kPa to 600°C. You are also reminded that the extracted steam is totally liquified in this closed feed water heater and then is pumped to 150 bar before joining with the feed water heater. Note that steam for the open feed water heater is bled from L.P. turbine at 5 bar. Determine : (i) Determine the amount of steam fraction that was extracted from the turbines (at each bled heater) (ii) What is the thermal efficiency of the system. (ii) Provide the process diagram for this problem.

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

See similar textbooks

Similar questions

When a steam boiler generates saturated steam at 2.5 mpa and the condenser pressure is 20 kpa, what is the Rankine cycle efficiency?Show complete step-by-step process and solution.
In an ideal Rankine cycle, steam is generated at 4.1 MPa and 480 deg. C. The condenser is at 32 deg. C. Determine: a. The cycle thermal efficiency b. For the engine with the same end states, the thermal efficiency and steam rateuse the attached steam table below
Q.3 A. Calculate the thermal efficiency of a Rankine cycle in which the steam is initially dry saturated at 2 Mpa and the condenser pressure 75 kN/m?. Express this efficiency as a percentage of a Carnot cycle efficiency of the same limits of temperature. B. If the steam leaves the boiler at 350°C with the same pressure of the boiler and condenser given above. Explain why the Rankine efficiency in (A) is less than in (B), and why the ratio of efficiencies of the respective Rankine and Carnot is greater.
Bokr Py- 6000 kP Wpampin Pump Turbine P50 kPa Condenser "punpin Figure 2 (b) Determine the thermal efficiency of the cycle in part (a) when the liquid enters the pump 1.3°C cooler than a saturated liquid at the condenser pressure.
A simple vapor - compression cycle develops 13 tons ofrefrigeration. Using ammonia as refrigerant and operating at acondensing temperature of 24 °C and evaporating temperature of-18°C and assuming that the compression are isentropic and thatthe gas leaving the condenser is saturated. Find the followinga). Draw the p-h diagramb.) Refrigerating effect in kJ/kgc.) Circulation flow in kg/mind.) Power requiremente.) Volume flow in cubic meter per minute per tonf.) Coefficient of performanceg.) Power per ton
Problem (1.2) A steam power plant working according to simple Rankine cycle. It has a high pressure of 3 MPa and it maintains 60°C in the condenser. A condensing turbine is used, but the quality should not be lower than 90% at any state in the turbine. Find the cycle efficiency. [reference: Fundamentals of Thermodynamics by Borgnakke & Sonntag prob.11.18,p-460].(Ans.33.2 %).
In an ideal Rankine cycle, steam is generated at 4.1 MPa and 480 deg. C. The condenser is at 32 deg. C. Determine: a. The cycle thermal efficiency b. For the engine with the same end states, the thermal efficiency and steam rate
8. A binary-vapour eycle operates on mercury and steam. Saturated mercury vapour at 4.5 bar is supplied to the mercury turbine, from which it exhaust at 0.04 bar. The mereury condenser generates saturated steam at 15 bar which is expanded in a steam turbine to 0.04 bar. (i) Find the overall efficiency of the ceycle. (ii) If 50000 kg/h of steam flows through the steam turbine, what is the flow through the mercury turbine ? (ii) Assuming that all processes are reversible, what is the useful work done in the binary vapour eyele for the specified steam flow ? (iv) If the steam leaving the mereury condenser is superheated to a temperature of 300°C in a super- heater located in the mercury boiler, and if the internal efficiencies of the mercury and steam tur- bines are 0.85 and 0.87 respectively, caleulate the overall efficiency of the eycle. The properties of saturated mercury are given below : p (bar) tCC) (kJ/ kg) (kJ / kg K) (m'/kg) 4.5 450 63.93 355.98 0.1352 0.5397 79.9 x104 0.068 0.04…
An industrial plant generates its own power thru heat transfer and mechanical work, from heat energy generator and turbo generator set. A bagasse fired 60 tonner water tube boiler generating 335 psi. And 330°C superheated steam. Condensates at 90°C feedwater absorbing heat at the deaerator and preheater by as much as 3 592 446 KJ/hr that supplies the steam drum at a rate of 10% higher than the steam generated. Tons steam per ton cane is 2. Superheated steam at a velocity of 25 m/sec is supplied to an impulse turbine that drives a generator producing electrical energy. Exhausted heat energy at a velocity of 20 m/sec, before undergoing heat condensations is at 800 KJ/kg. Determine the following: The Boiler Thermal Efficiency
Problem (1.1) Consider a solar-energy- powered ideal Rankine, see figure (1), this cycle uses water as the working fluid. Saturated vapor leaves the solar collector at 175°C, and the condenser pressure is 10 kPa. Determine the thermal efficiency of this cycle. [reference: Fundamentals of Thermodynamics by Borgnakke & Sonntag prob.11.14,p-460].(Ans.26.1 %). th Solar collector ORAD Turbine Condenser W₁ Figure (1): Simple Rankine Cycle.
A steam power plant work between boiler pressure (42 bar) and condenserpressure (0.034 bar). Calculate the efficiency of the cycle and specific steamconsumption for the cases:1. The plant work on Carnot cycle.2. The plant work on Rankine cycle.3. The plant work on Rankine cycle with ηiso (Turb.) = 0.84. The plant work on Rankine cycle and the steam is superheated to 500 Celicus. Neglectwork done on the pump.
Prob-2 In a Rankine cycle steam power plant 0.9 MW energy is taken out in the condenser, 0.63 MW power is taken out in the turbine, and the pump work is 0.03 MW. (a) Find the plant thermal efficiency. (b) if cycle is reversed, consider turbine is a compressor; condenser is an evaporator; find the COP of the air-conditioning system. QH QL WI