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A surface condenser for a non reheat turbine exhausts 6 kg/sec of steam at 6.8 KPaa (tsat = 38.5C) with circulating water entering at 27C and a terminal temperature difference 4C. Overall coefficient of heat transfer is 3.6 KW/m2-C and water velocity is assumed to be 2.13 m/sec. Tube type ¾ in 18 BWG (OD = 17 mm; t = 1.3 mm). Tube sheet thickness is 12 mm. Assuming two tube passes design and 2210 KJ/kg of heat rejection, determine the actual length and total number of tubes required by the condenser.
A steam turbine receives 362,500 kg/h of steam throttled at 8.7 MPa and 410OC. steam leaves the high pressure turbine shell at 2 MPa with 7.58 degrees of superheat. Reheated steam is at 1.9 MPa and 410OC. Condensate is at 78OC. For a generator output of 100 MW at 94% efficiency, calculate (a) the combined thermal efficiency, (b) the actual condition of exhaust steam, (c) the thermal efficiency of the ideal engine, (d) the combined engine efficiency, and (e) the ideal thermal efficiency of the cycle without pressure drop through reheater
A 100-mm radius cylinder filled with water is fitted with a piston of negligible weight. A force F is applied to the piston. The manometer attached is filled with mercury (SG = 13.57) and is displaced as shown. Determine the force F.
