1.4 A steam turbine is operating at a steam flow rate of 550 kg/s with an enthalpy of live steam h, of 3670 kJ/kg and enthalpy of exhaust steam h, of 2010 kJ/kg. The condensate enthalpy h, at the condenser outlet is 140 kJ/kg. Calculate (i) the power output of the steam turbine, (ii) the rate of heat rejection in the condenser, and (iii) the required cooling water flow in the condenser, where its temperature increases by AT-w= 11 K. The specific heat of water is 4.19 kJ/kgK.

1.4 A steam turbine is operating at a steam flow rate of 550 kg/s with an enthalpy of live steam h, of 3670 kJ/kg and enthalpy of exhaust steam h, of 2010 kJ/kg. The condensate enthalpy h, at the condenser outlet is 140 kJ/kg. Calculate (i) the power output of the steam turbine, (ii) the rate of heat rejection in the condenser, and (iii) the required cooling water flow in the condenser, where its temperature increases by AT-w= 11 K. The specific heat of water is 4.19 kJ/kgK.

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

3.) An ammonia compressor operates at evaporator pressure of 316.02 kPa and a condenser pressure of 1557 kPa. A twin-cylinder compressor with bore to stroke ratio of 0.85 is to used at 1200 rpm. The actual volumetric efficiency is 92% and compression and mechanical efficiency is 78% and 80% respectively. For a cooling capacity of 25 TR, (a) the sketch the p-h diagram labeling the evaporating and condensing temperature and pressures (b) define the all properties of ammonia taken from saturation table. Determine (c) the quantity of cooling water in the condenser in kg/min if the increase in temperature is 8°C, (d) the bore and stroke expressed in cm and (e) the size of the driving motor in hp. Given: h2 = h at 1557 kPa and s2 = s1 1695 kJ/kg
1. Condensation streams through an outlet at a mass movement rate of m=0.2kg/s with a heat loss of 5kW. The enthalpies at creek and exit are 2500kJ/kg and 2350kJ/kg respectively. Assuming negligible velocity at inlet (c1 = 0, the velocity (C2) of team (in m/s) at nozzle exit is
6.3 A food storage chamber requires a refrigeration system of 15-ton capacity operating at an evaporator temperature of -8°C and a condenser temperature of 30°C. Refrigerant ammonia (R-717) is used and the system operates under сapacity saturated conditions. Determine: a. С.О.Р. b. Refrigerant flow rate c. Rate of heat removed by condenser Repeat problem 6.3, with the refrigerant subcooled by 5°C before entering the expansion valve and vapor superheated by 6°C.
A steam condenser receives 10 kg per second of steam with an enthalpy of 2570 KJ/kg. Steam condenses into liquid and leaves with an enthalpy of 160 KJ/kg, if cooling water passes through the condenser with temperature increases from 13oC to 24oC. Calculate the cooling water flow rate in kg/sec. pls dont skip anything show all solution including conversion of units
Hello! I'd like help with the following exercise, from Levenspiel's "Engineering Flow and Heat Exchange". Leftover air at 20ºC and 100kPa is driven by a fan through a horizontal galvanized conduit of 1 m in diameter and 10m in length at a speed of 10 m/s. What size motor should be used if its efficiency is 90% and that of the fan is 20%? I'm not sure where to start. My professor hasn't explained much about this subject.
Q4//A// Prove for the condenser: + %3D Cpw (Twz-Tw1) when the temperature of cooling water outlet and inlet is equal to saturation temperature of steam and the condensate leaving the condenser respectively; also, the inlet of condenser is dry steam with unity latent heat. m, Twi
4. The condensing pressure for a Rankıne engine Is I Calculate the net work for 1 kg 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. Ans. (a) 627.2 kJ/kg, 26.4%; (b) 727.3 kJ/kg, 27.5%; (c) 1079.49 kJ/kg, 32.35% ot 2 15 MPà
The condensing pressure for a Rankine engine is 0.001325 MPavac. Calculate the following for steam flow rate = 16.3846 kg/sec of steam when the steam at the beginning of expansion is at 119.6 deg SH and 4.0 Mpaa. Draw the TS and equipment diagrams for the ideal and actual case and find for the following for the ideal case: Combined work (KW) . Ans.____________________________ Combined steam rate in kg/KW-hr. Ans.___________________________ Actual heat rate( KJ/KW-hr). Ans.____________________________
A gas turbine exhaust stack cooler drops the gas temperature from 1020oF to 605°Fby means of a water cooling coil. Cooling water enters the coil at 65°F and leaves,after a counter-flow passage, with a temperature of 190°F. If cp for the gas is 0.26Btu/lb.F, calculate the overall heat transfer coefficient for an exchanger area of2000 ft2, Btu/hr.ft2.F.A. 19.94 B. 29.94 C. 39.94 D. 49.94
5. A counter-flow bank of boiler tubes has a total area of 900 sq ft and its overall efficiency of heat transfer is 13 Btu/hr-ft2-degF. Calculate the heat transferred if the log mean temperature difference is 1380 deg F.
A steam condenser receives 10 kg per second of steam with an enthalpy of 2570 KJ/kg. Steam condenses into liquid and leaves with an enthalpy of 160 KJ/kg, if cooling water passes through the condenser with temperature increases from 13oC to 24oC. Calculate the cooling water flow rate in kg/sec. Show conversion of units pls
A manufacturer conducted an experiment for an evaporator capacity 500 kW cooling and designed for high COP of 2 when using lithium bromide plus water in an absorption refrigeration system. The evaporator operates 20 C, condenser 40 C & absorber 45 C supplying 1.4 kg/s of water plus lithium bromide solution to the generator. For a condenser size of 650 kW, determine:Ethalphy of the refrigerant entering the Evaporator in kJ/kg Answer in two decimal places