Water exiting the condenser of a power plant at 408Centersa cooling tower with a mass flow rate of 5 7.5 3 105kg/min. A stream of cooled water is returned to thecondenserfrom a cooling tower with a temperature of 328C andthesame flow rate. Makeup water is added in a separatestream at 218C. Atmospheric air enters the coolingtowerat 1 bar, 268C and 40% relative humidity. Moist airexitsthe tower at 368C and 90% relative humidity.Determinethe mass flow rates of the dry air and the makeupwater,in kg/min. The cooling tower operates at steady state.Heat transfer with the surroundings and the fanpowercan each be neglected, as can changes in kinetic andpotential energy. The pressure remains constantthroughoutat 1 bar.

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Answered: Determine the mass flow rates of the…

Engineering

Mechanical Engineering

Determine the mass flow rates of the dry air and the makeup 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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Concept explainers

Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.

Question

Water exiting the condenser of a power plant at 408C
enters
a cooling tower with a mass flow rate of 5 7.5 3 105
kg/min. A stream of cooled water is returned to the
condenser
from a cooling tower with a temperature of 328C and
the
same flow rate. Makeup water is added in a separate
stream at 218C. Atmospheric air enters the cooling
tower
at 1 bar, 268C and 40% relative humidity. Moist air
exits
the tower at 368C and 90% relative humidity.
Determine
the mass flow rates of the dry air and the makeup
water,
in kg/min. The cooling tower operates at steady state.
Heat transfer with the surroundings and the fan
power
can each be neglected, as can changes in kinetic and
potential energy. The pressure remains constant
throughout
at 1 bar.

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