A power plant delivering 900 MWe has an efficiency of 30% with 15 percent of the waste heat being released to the atmosphere as stack heat and the other 85 percent taken away in the cooling water. This plant uses an evaporating cooling tower wherein heat is released to the atmosphere as cooling water is vaporized. Evaporative cooling Stack heat River Makeup water a. What is the total amount of heat supplied to the power plant (in MW)? Round off your answer to the nearest whole number. b. If the temperature of the makeup water from the river is 15 C, at what rate (in m3/s) should water be withdrawn to offset the water lost in the cooling tower? Heat of vaporization of water at 15 C is 2,465 kJ/kg. Round off your answer to two (2) decimal places

A power plant delivering 900 MWe has an efficiency of 30% with 15 percent of the waste heat being released to the atmosphere as stack heat and the other 85 percent taken away in the cooling water. This plant uses an evaporating cooling tower wherein heat is released to the atmosphere as cooling water is vaporized. Evaporative cooling Stack heat River Makeup water a. What is the total amount of heat supplied to the power plant (in MW)? Round off your answer to the nearest whole number. b. If the temperature of the makeup water from the river is 15 C, at what rate (in m3/s) should water be withdrawn to offset the water lost in the cooling tower? Heat of vaporization of water at 15 C is 2,465 kJ/kg. Round off your answer to two (2) decimal places

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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ervi n.k2603@sadiq.edu.iq SwMO Aslacel Asiacell jjs 0701 The name and photo associated with your Google account will be recorded when you upload files and submit this form. Your email is not part of 070E your response. Required Untitled Question * Q1: Refrigerant-134a is the working fluid in an ideal compression refrigeration cycle. The refrigerant leaves the evaporator -20°C and has a condenser pressure of 0.9 MPa. The mass flow rate is 3 kg/min. Find COP, COPR Carnot for same Tma and Tmin , and the tons of refrigeration. 1 Add file Untitled Question * Q2: A simple VCRC using R-134a operates with a condensing temperature of 30°c and an evaporating temperature of -20°c .The system produces 50 kw of refrigeration. Determine the : a) Thermodynamic property values at the four main state points of the cycle, b) COP, c) Rate of refrigerant flow. 1 Add file Submit Clear form This form was created inside of tmam Ja'afar Al-Sadia وأثق السلأمي 11:41p äc lull 22.04.02
True or false: in the heat engine of a thermal power plant, the input heat is converted into useful work by boiling water into hot, high pressure steam that turns a turbine to generate electrical energy and no heat is wasted. Question 11 options: True False
PLEASE ANSWER THEM ALL ASAP COZ I NEED THEM ASAP PLEASE. THANK YOU. >>>Thermodynamics
Completely solve and box the final answers. Write legibly
Ipaliwanang ang Geothermal Energy At Geothermal Power Plant (Tagalog)
Read the questions carefully and answer with complete solution and units. Use the steam tables provided and use 4 decimal places for solving. Final answer shown are in 2 decimal places. Draw the T-S diagrams properly with respect to the saturation line A steam power plant operates on the ideal Rankine cycle producing a net power output of 120 MW. The maximum pressure of the cycle is 15 MPa, and the minimum pressure is 5 kPa. Steam initially enters the turbine at 500 C. a.) Draw the proper T-S diagram of the cycle with proper label for the points. b.) Find the quality of the steam entering the condenser, Qa, Qr, Wt, Wp, Wnet, efficiency, mass flow rate and steam rate
Q1) Select TRUE or FALSE For the Following Statements: 1. When some steam extracted from the turbine to pre-heat the liquid which is exiting the pump this process is called Regeneration. 2. In closed feed-water heater the extracted steam from the turbine is mixed directly with the incoming subcooled water to produce saturated steam at the extraction steam pressure. 3. An open feed-water heater is treated as a mixing chamber. 4. In closed feed-water heater type, we need an additional pump for each closed feed- water. 5. Cogeneration is the simultaneous generation of electricity and steam. net work 6. The utilization factor for cogeneration plant = total heat input 7. In bottoming cycle cogeneration the steam is used directly for process steam requirements, the turbine in this case is called a back-pressure turbine. 8. For the following fig. the turbine and the pump work ideally 9. 4s Chose the most suitable choice for the following statements: 1. The -------.------ also called shell and…
Power generation using steam is one of the most common method which can be found around the world. In these type of power plants, steam goes through a basic thermodynamic cycle called Rankine cycle which is shown in the following figure. Steam flow Boiler Qin Pump Wout Win Condenser •Qout For the proper operation of the cycle, water should be pumped to the boiler using pump which required work input (Wm) generate steam and then high pressure steam is fed to the turbine. By extracting the energy from high pressure steam, turbine is producing work output (Wout). Because of this, the steam pressure is reduced and low pressure steam is flowing into the condenser. Condenser removes heat energy from steam further (Qout) and steam is converted into liquid water. The liquid water can be pumped into the boiler again and the cycle continues. Performance of a Ranking cycle can be evaluated by using thermal efficiency (nth)which is determined from; the cycle. Heat energy should be supplied to the…
DESIGN a steam power plant that produces 70 MW of power. The plant should have an open heater and a reheater operating simultaneously utilizing saturated steam from the partial expansion of steam in the turbine. The remaining steam is reheated to the inlet temperature of steam when it enters the turbine. Another open heater is used to bled saturated steam when the steam partially expands in the turbine after reheating, remaining steam is expanded to the exhaust pressure of the turbine. Other pertinent data are as follows: steam turbine: inlet pressure – 6.6 MPa; inlet temperature - 420 C; exhaust pressure – 10 KPa; stages of turbine – all pressure compounded stage; pumps – 90% efficient; shaftings – 75%% efficient; generator – 95% efficient. DRAW a line diagram of the design plant indicating the pressure, temperature and enthalpy at each point and specify the following: a) the mass requirement of the steam plant in kg/hr b) the masses extracted in kg/hr and c) the plant thermal…
Complete solution and units please. Use the steam tables provided, and use 4 decimal places for solving. Final answers are shown in 2 decimal places. Draw the T-S diagram properly with respect to the saturation line. 2. A steam power plant uses the ideal Regenarative Rankine cycle with single open feedwater heater where the steam enters the high pressure turbine at 4 UPa and sooc. At partially expands to 600 kPa then some steam is extracted at this point. The remaining steam expands and enters the condenser at 10 kPa. Sketch the schematic diagram and the TS diagram with labeled points, and solve for marr taken for feedwater heating, Qa, Qr, Wt, Wp. What, thermal exter efficiency and Steam rate. Neglect the condensate pump work." Answer: 20.01% 2286.40 kJ. 1457.51 kJ 1 832.54 kJ 1 kg 3.74 kJ kg kg 36.25%, 4.34 £] 828.89 kJ " kg ку. kuh Specific Volume Internal Sal. Enthalpy Press. MPa Se Entropy Sat, V Sat. Sat. Sat. Evap. Liquid Evap. Vapor Vapor р 10¹ Liquid Uy 103 apor U₂ h, hre h₂…
Steam is supplied to a two-stage turbine at 48 bar and 400 °C. It expands in the first turbine until it is just dry saturated, then it is re-heated to 400 °C and expanded through the second-stage turbine. The condenser pressure is 0.04 bar. High-P turbine Low-P turbine Reheater Boiler -o P4 = P3 = Preheat Condenser Use file 4 to answer quesion 4 to find the thermal efficiencyof the systemin percentage to 2.d.p. ? Ifo
Question 2: (a) The pressure at which the steam should be reheated. (b) The thermal efficiency of the cycle. (c) Total heat input (Qin) (d) Total turbine work output (Wtur.out) (e) Draw the T-S diagram Notes: Assume the steam is reheated to the inlet temperature of the high-pressure turbine. • The moisture content of the steam at the exit of the low-pressure turbine is not to exceed 9.5% Boiler 650 C 17.5 MPa ww Reheater High-P turbine P₁ = Ps= Preheat Pump Low-P turbine Condenser e 15 KPa