Q1. The cooling water from the condenser of a power plant enters a wet coolingtower at (35° C) at a rate of 85 kg/s. The water is cooled to 28°C in the coolingtower by air that enters the tower at 1 atm, 23°C, and 40 percent relative humidityand leaves at 30°C and 80 percent relative humidity. Neglecting the power input tothe fan, determine (a) the volume flow rate of air into the cooling tower and (b) themass flow rate of the required makeup water.(c) the mass flow rate of the waterthat leaves the wet cooling tower. (d) the water that leaves the cooling tower is lessthan the inlet water. Discuss this issue. (e) in your opinion if the relative humidityof the air that inters the cooling tower is less than 40 percent would this increase ordecrease the value of the make up water.Q2. The schematic of a single-flash geothermal power plant with state numbers isgiven below. Geothermal resource exists as saturated liquid at (260.5) °C. Thegeothermal liquid is withdrawn from the production well at a rate of 222 kg/s, andis flashed to a pressure of 550 kPa by an essentially isenthalpic flashing processwhere the resulting vapor is separated from the liquid in a separator and directed tothe turbine which is working ideally. The steam leaves the turbine at 10 kPa with amoisture content of 13 percent and enters the condenser where it is condensed androuted to a reinjection well along with the liquid coming off the separator. Drawthe T.S diagram and Determine (a) the mass flow rate of steam through the turbine,(b) the power output of the turbine. (c) the thermal efficiency of the cycle(d) why the efficiency is so low and, in your opinion, how can we rise theefficiency.

Q1. The cooling water from the condenser of a power plant enters a wet cooling tower at (35° C) at a rate of 85 kg/s. The water is cooled to 28°C in the cooling tower by air that enters the tower at 1 atm, 23°C, and 40 percent relative humidity and leaves at 30°C and 80 percent relative humidity. Neglecting the power input to the fan, determine (a) the volume flow rate of air into the cooling tower and (b) the mass flow rate of the required makeup water.(c) the mass flow rate of the water that leaves the wet cooling tower. (d) the water that leaves the cooling tower is less than the inlet water. Discuss this issue. (e) in your opinion if the relative humidity of the air that inters the cooling tower is less than 40 percent would this increase or decrease the value of the make up water.

Q1. The cooling water from the condenser of a power plant enters a wet cooling tower at (35° C) at a rate of 85 kg/s. The water is cooled to 28°C in the cooling tower by air that enters the tower at 1 atm, 23°C, and 40 percent relative humidity and leaves at 30°C and 80 percent relative humidity. Neglecting the power input to the fan, determine (a) the volume flow rate of air into the cooling tower and (b) the mass flow rate of the required makeup water.(c) the mass flow rate of the water that leaves the wet cooling tower. (d) the water that leaves the cooling tower is less than the inlet water. Discuss this issue. (e) in your opinion if the relative humidity of the air that inters the cooling tower is less than 40 percent would this increase or decrease the value of the make up 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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Question

Q1. The cooling water from the condenser of a power plant enters a wet cooling
tower at (35° C) at a rate of 85 kg/s. The water is cooled to 28°C in the cooling
tower by air that enters the tower at 1 atm, 23°C, and 40 percent relative humidity
and leaves at 30°C and 80 percent relative humidity. Neglecting the power input to
the fan, determine (a) the volume flow rate of air into the cooling tower and (b) the
mass flow rate of the required makeup water.(c) the mass flow rate of the water
that leaves the wet cooling tower. (d) the water that leaves the cooling tower is less
than the inlet water. Discuss this issue. (e) in your opinion if the relative humidity
of the air that inters the cooling tower is less than 40 percent would this increase or
decrease the value of the make up water.
Q2. The schematic of a single-flash geothermal power plant with state numbers is
given below. Geothermal resource exists as saturated liquid at (260.5) °C. The
geothermal liquid is withdrawn from the production well at a rate of 222 kg/s, and
is flashed to a pressure of 550 kPa by an essentially isenthalpic flashing process
where the resulting vapor is separated from the liquid in a separator and directed to
the turbine which is working ideally. The steam leaves the turbine at 10 kPa with a
moisture content of 13 percent and enters the condenser where it is condensed and
routed to a reinjection well along with the liquid coming off the separator. Draw
the T.S diagram and Determine (a) the mass flow rate of steam through the turbine,
(b) the power output of the turbine. (c) the thermal efficiency of the cycle
(d) why the efficiency is so low and, in your opinion, how can we rise the
efficiency.

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