Not ai generated please show all steps 2. A steam power plant operates at a high pressure and temperature of 1 MPa and 300°C and a lowpressure of 15 kPa. The actual work output (Wa) of the turbine is found to be at 600 kJ/kg with steamflowing through it. Determine (a) the turbine inlet enthalpy (h3) and outlet quality (x4s), (b) the idealenthalpy at the exit of the turbine, (c) the ideal work load (W4s), (d) the thermal efficiency (nt) based onan actual turbine work load of 600 kJ/kg, and (e) the exit actual enthalpy (h4a).

a.) Turbine inlet enthalpy = 3,051.2 kJ/kg Quality at outlet = 0.878 or 87.8 %b.) Ideal…

Answered: 2. A steam power plant operates at a…

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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A steam power plant develops a power output of 2840Kw. Te enthalpy of steam at the inlet if 2500 KJ/kg at500C and at the outlet is as follows: T=200C, dryness factor, x=0.8, hf2=561 KJ/kg and hfg2=1832 K/kg.Calculate the mass flow rate of the steam in kg/sec.
R-134a enters the adiabatic compressor as saturated steam at 160kPa pressure and is compressed to 900kPa pressure. If the volumetric flow of R-134a at the compressor inlet is 2m3/minute, calculate the minimum power required to start the compressor. A-3,03 kWB-9,71 kWC-5,46 kWD-6.79 kWE-8.41 kW (Note: This question is Turkish. I'm using google translate) orginal question: R-134a adyabatik kompresöre 160kPa basınçta doymuş buhar olarak girmekte ve 900 kPa basınca sıkıştırılmaktadır. R-134a’nın kompresör girişindeki hacimsel debisi 2m3/dk ise kompresörü çalıştırmak için gerekli en az gücü hesaplayınız. A-3,03 kWB-9,71 kWC-5,46 kWD-6,79 kWE-8,41 kW
Thermodynamics Refrigerant R-134a to the compressor of a refrigeration machine It enters at 140 kPa pressure and -10 °C, and exits at 1 MPa pressure. Volumetric flow of the refrigerant entering the compressor It is 0.23 m³/minute. The refrigerant enters the throttling valve at a pressure of 0.95 MPa and at 30 °C, and exits the evaporator as saturated steam at -18 °C. Adiabatic efficiency of the compressor It is 78%. Show the cycle in the T-s diagram. And; a) Calculate the power required to run the compressor. b) Calculate the heat absorbed per unit time from the cooled medium. ( COPSM=? ) c) Calculate, between the evaporator and the compressor, how much the pressure of the refrigerant drops and how much the heat gain.
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15- R134a enters a compressor with a heat loss of 200 W as saturated steam at -24 ºC and after compressing to 0.8 MPa, it exits the compressor at 60 ºC. The mass flow of R134a is 1.2 kg/s. Calculate the volumetric flow of the refrigerant at the compressor inlet. A-0,129 m3/sB-0,293 m3/sC-0,163 m3/sD-0,209 m3/sE- 0,347 m3/s (Note: This Turkish I'm using translate) orginal; R134a ısı kaybı 200 W olan bir kompresöre doymuş buhar olarak -24 ºC sıcaklıkta girmekte ve 0.8 MPa basınca sıkıştırıldıktan sonra kompresörden 60 ºC sıcaklıkta çıkmaktadır. R134a’nın kütlesel debisi 1.2 kg/s’dir.Soğutucu akışkanın kompresör girişindeki hacimsel debisini hesaplayınız.
b) A desktop computer is to be cooled by a fan. The electronic components of the computer consume 100 W of power under full-load conditions. The computer is to operate in environments at temperatures up to 55°C and at elevations up to 3000 m where the atmospheric pressure is 70.12 kPa. The exit temperature of air is not to exceed 65°C to meet the reliability requirements. Also, the average velocity of air is not to exceed 110 m/min at the exit of the computer case, where the fan is installed to keep the noise level down. Calculate the required flow rate and the diameter of the casing of the fan that needs to be installed.
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Determine the change in entropy (BTU/R) in an isothermal process having an initial volume of 18 cu ft and a final volume of 46 cu ft. The mass is 58 lb and the specific heat is 0.24 BTU/b-R
A gas enters a turbine at an inlet state of 800 kPa. The gas expands and leaves the turbine atan outlet state of 100 kPa and 497 Celcius. The amount of heat transferred out from the turbine tothe surrounding is 10 kJ/kg. The surrounding is at a temperature of 28 Celcius. The actual workoutput from the turbine is 484 kJ/kg. Properties of the gas: R = 0.287 kJ/kg.K;cp = 1.138 kJ/kg.K; cv = 0.851 kJ/kg.K; k = 1.337; i) Write the energy balance equation for the turbine and state your assumptions.ii) Determine the temperature of the gas at the turbine inlet, K.iii) Determine the entropy generation, sgen during the expansion process, kJ/kg.K.iv) Is the expansion process possible? Briefly explain your answer.v) Determine the isentropic efficiency of the turbine, %.
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