A pump is used to circulate hot water in a home heating system. Water enters the well-insulated pump operating at steady state at arate of 0.42 gal/min. The inlet pressure and temperature are 14.7 Ibf/in.², and 180°F, respectively; at the exit the pressure is 120Ibf/in.2 The pump requires 1/ 15 hp of power input. Water can be modeled as an incompressible substance with constant density of60.58 Ib/ft3 and constant specific heat of 1 Btu/lb · °R.Neglecting kinetic and potential energy effects, determine the temperature change, in °R, as the water flows through the pump.AT =i°R

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Answered: A pump is used to circulate hot water…

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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4.30 Refrigerant 134a enters a heat exchanger operating ai steady state as a superheated vapour at 10 bars. 60°C. where it is cooled and condensed to saturated liquid at 10 bars. The mass flow rate of the refrigerant is 10 kg/min. A separate stream of air enters the heat exchanger at 37°C with a mass flow rate of 80 kg/min. Ignoring heat transfer from the outside of the heat exchanger and neglecting kinetic and potential energy effects, determine the exit air temperature, in °C.
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Refrigerant 134a enters an insulated diffuser as a saturated vapor at 80°F with a velocity of 1400 ft/s. The inlet area is 1.4 in². At the exit, the pressure is 400 lb/in² and the velocity is negligible. The diffuser operates at steady state and potential energy effects can be eglected. Determine the mass flow rate, in lb/s, and the exit temperature, in °F. Step 1 Your answer is correct. Determine the mass flow rate, in lb/s. m = 28.887 Hint Step 2 lb/s. Determine the exit temperature, in °F. T₂ = i OF Attempts: 1 of 4 used

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