Homework Answers
Add Answer to:
Question 1 A forced draft countercurrent water cooling tower is to cool water from 43.3 to...
need an answer for this question, please. thanks. An existing packed countercurrent water-cooling tower was designed...
need an answer for this question, please. thanks.
An existing packed countercurrent water-cooling tower was designed to cool water from 107.6 degree F to 82.4 degree F. The air enters at 82.4 degree F with a wet bulb temperature of 72.5 degree F. The water flow rate is 1900 lb_m water/h.ft^2 and the gas flowrate is 1450 lb_m dry air/h.ft^2. The tower operates at a pressure of 1 atm. Given the overall mass-transfer coefficient (K_ca) is 6.75 lb mol/h.ft^3. Determine...
4. Liquid water at 100°F and 200 gal/min volumetric flow rate enters a cooling tower operating...
4. Liquid water at 100°F and 200 gal/min volumetric flow rate enters a cooling tower operating at steady state. Atmospheric air enters with a dry-bulb temperature of 80°F and a wet-bulb temperature of 60°F. Moist air exits the cooling tower at 90° and 90% relative humidity. Makeup water is provided at 80°F. Calculate the mass flow rates of the dry air and makeup water, each in lb/min, versus return water temperature at 80, 90, and 100°F. Ignore kinetic and potential...
Water entering a wet cooling tower at 35°C at a rate of 100 kg/s is cooled to 22°C in the cooling tower by air that enters the tower at 1 atm, 20°C, and 60% relative humidity and leaves saturated at 3...
Water entering a wet cooling tower at 35°C at a rate of 100 kg/s
is cooled to 22°C in the cooling tower by air that enters the tower
at 1 atm, 20°C, and 60% relative humidity and leaves saturated at
30°C. The makeup water of 22°C is supplied to the outlet to make
the mass flow rate of the cool water the same as that at the inlet,
see Figure Q5.
Q.5Water entering a wet cooling tower at 35°C at...
2. (25 pts) Nuclear power plants have large amounts of heated water to cool, which may be done in a cooling tower. A sample tower reduces the temperature of warm water from 130 F to 90'F (see fig...
2. (25 pts) Nuclear power plants have large amounts of heated water to cool, which may be done in a cooling tower. A sample tower reduces the temperature of warm water from 130 F to 90'F (see figure at right). Air without water vapor flows into the tower at Wet air 156,900 b/hr 151,000 lb/hr Given that the air removing heat along with some water flows at 156,900 lb/hr, what is the flowrate of the cooled warm water 250,000 lb/hr...
Subject Refrigeration and Air Conditioning. Please answer in detail. QUESTION 15-COOLING TOWERS AND EVAPORATIVE CONDENSERS A...
Subject Refrigeration and Air Conditioning. Please answer in
detail.
QUESTION 15-COOLING TOWERS AND EVAPORATIVE CONDENSERS A cooling tower is a device that cools a spray of water by passing it through a stream of air. If 15 m3/s of air is at 35 °C dry-bulb and 24 °C wet-bulb temperature and an atmospheric pressure of 101 kPa enters the tower and the air leaves saturated at 31 °C, (a) to what temperature can this airstream cool a spray of water...
H1- COOLING TOWER [10 p] 1. What is the wet bulb temperature? How can you measure...
H1- COOLING TOWER [10 p] 1. What is the wet bulb temperature? How can you measure it? Is the wet-bulb temperature greater than dry-bulb temperature? Why? [10 p] 2. A cooling tower is to be designed to cool 8 kg/s of water from 37°C to 29 °C. Entering air is 25 °C and at 30 % relative humidity. Leaving air is 22 °C and at 90% relative humidity. a) Calculate the air flow rate, G. b) Determine the possible lowest...
An evaporative cooling tower removes 1 x 106 Btu/hr of heat from the cooling water from...
An evaporative cooling tower removes 1 x 106 Btu/hr of heat from the cooling water from a condenser of a steam power plant. The temperature of the water is reduced from 120 °F to 110 °F. Air enters the cooling tower at 91 °F and 60% relative humidity and air leaves at 100 °F and 82% relative humidity. The quantity of make-up water is:
If the cooling water (cp = 4180 J/kg·ºC) from the above problem is to be provided...
If the cooling water (cp = 4180
J/kg·ºC) from the above problem is to be provided evenly by 10
cooling towers. Humid air enters each tower at 1 atm, 15 ºC and 20%
relative humidity, and leaves at 20 ºC and 0.014 kg of water/kg of
dry air. Determine the required volume flow rate of air through
each cooling tower.
Air exit 20 °C, 0 = 0.014 kg of water/kg of air Warm water 40 °C Air inlet 1 atm...
Part 3 is the total cooling load at the bottom QUESTION ONE gw constitrat a) State...
Part 3 is the total cooling load at the bottom
QUESTION ONE gw constitrat a) State Dalton's law of partial pressures be taken to occupy the entre vchure. (2 marks) b) When are the dry-bulb and dew temperatures identical? (2 marks) c) Define the dew point temperature. (2 marks) The reaperture d) Moist air at 20°C, 1 bar, 43% relative humidity and a volumetric flow rate of 900 m/h enters a control volume at steady state and flows along a...
can you help me how to get the h, h* and (h*-h)L (highlighted in yellow colour)?...
can you help me how to get the h, h* and (h*-h)L (highlighted in
yellow colour)?
EXAMPLE 19.3. A counterflow induced-draft cooling tower operates with inlet and exit water temperatures of 105 and 85°F when the air has dry-bulb and wet-bulb temperatures, respectively, of 90 and 76°F. The tower has 4 ft of stacked plastic fill, and the flow rates are G, = 2,000 lb/h. ft? and G: = 2,200 lb/h. ft?. (a) Determine the number of transfer units, the...
need an answer for this question, please. thanks.
An existing packed countercurrent water-cooling tower was designed to cool water from 107.6 degree F to 82.4 degree F. The air enters at 82.4 degree F with a wet bulb temperature of 72.5 degree F. The water flow rate is 1900 lb_m water/h.ft^2 and the gas flowrate is 1450 lb_m dry air/h.ft^2. The tower operates at a pressure of 1 atm. Given the overall mass-transfer coefficient (K_ca) is 6.75 lb mol/h.ft^3. Determine...
4. Liquid water at 100°F and 200 gal/min volumetric flow rate enters a cooling tower operating at steady state. Atmospheric air enters with a dry-bulb temperature of 80°F and a wet-bulb temperature of 60°F. Moist air exits the cooling tower at 90° and 90% relative humidity. Makeup water is provided at 80°F. Calculate the mass flow rates of the dry air and makeup water, each in lb/min, versus return water temperature at 80, 90, and 100°F. Ignore kinetic and potential...
Water entering a wet cooling tower at 35°C at a rate of 100 kg/s
is cooled to 22°C in the cooling tower by air that enters the tower
at 1 atm, 20°C, and 60% relative humidity and leaves saturated at
30°C. The makeup water of 22°C is supplied to the outlet to make
the mass flow rate of the cool water the same as that at the inlet,
see Figure Q5.
Q.5Water entering a wet cooling tower at 35°C at...
2. (25 pts) Nuclear power plants have large amounts of heated water to cool, which may be done in a cooling tower. A sample tower reduces the temperature of warm water from 130 F to 90'F (see figure at right). Air without water vapor flows into the tower at Wet air 156,900 b/hr 151,000 lb/hr Given that the air removing heat along with some water flows at 156,900 lb/hr, what is the flowrate of the cooled warm water 250,000 lb/hr...
Subject Refrigeration and Air Conditioning. Please answer in
detail.
QUESTION 15-COOLING TOWERS AND EVAPORATIVE CONDENSERS A cooling tower is a device that cools a spray of water by passing it through a stream of air. If 15 m3/s of air is at 35 °C dry-bulb and 24 °C wet-bulb temperature and an atmospheric pressure of 101 kPa enters the tower and the air leaves saturated at 31 °C, (a) to what temperature can this airstream cool a spray of water...
H1- COOLING TOWER [10 p] 1. What is the wet bulb temperature? How can you measure it? Is the wet-bulb temperature greater than dry-bulb temperature? Why? [10 p] 2. A cooling tower is to be designed to cool 8 kg/s of water from 37°C to 29 °C. Entering air is 25 °C and at 30 % relative humidity. Leaving air is 22 °C and at 90% relative humidity. a) Calculate the air flow rate, G. b) Determine the possible lowest...
An evaporative cooling tower removes 1 x 106 Btu/hr of heat from the cooling water from a condenser of a steam power plant. The temperature of the water is reduced from 120 °F to 110 °F. Air enters the cooling tower at 91 °F and 60% relative humidity and air leaves at 100 °F and 82% relative humidity. The quantity of make-up water is:
If the cooling water (cp = 4180
J/kg·ºC) from the above problem is to be provided evenly by 10
cooling towers. Humid air enters each tower at 1 atm, 15 ºC and 20%
relative humidity, and leaves at 20 ºC and 0.014 kg of water/kg of
dry air. Determine the required volume flow rate of air through
each cooling tower.
Air exit 20 °C, 0 = 0.014 kg of water/kg of air Warm water 40 °C Air inlet 1 atm...
Part 3 is the total cooling load at the bottom
QUESTION ONE gw constitrat a) State Dalton's law of partial pressures be taken to occupy the entre vchure. (2 marks) b) When are the dry-bulb and dew temperatures identical? (2 marks) c) Define the dew point temperature. (2 marks) The reaperture d) Moist air at 20°C, 1 bar, 43% relative humidity and a volumetric flow rate of 900 m/h enters a control volume at steady state and flows along a...
can you help me how to get the h, h* and (h*-h)L (highlighted in
yellow colour)?
EXAMPLE 19.3. A counterflow induced-draft cooling tower operates with inlet and exit water temperatures of 105 and 85°F when the air has dry-bulb and wet-bulb temperatures, respectively, of 90 and 76°F. The tower has 4 ft of stacked plastic fill, and the flow rates are G, = 2,000 lb/h. ft? and G: = 2,200 lb/h. ft?. (a) Determine the number of transfer units, the...
Most questions answered within 3 hours.
-
ANNOTATE BRIEFLY LINE BY LINE THE FOLLOWING CODE:
package shop.data;
import junit.framework.Assert;
import junit.framework.TestCase;
public class...
asked 14 minutes ago -
Post an explanation of the criteria you could
use to evaluate alignment between data collection methods...
asked 17 minutes ago -
1. (a) Different conformations are found in pentane.
(i) Using Newman Projection, draw all the possible...
asked 17 minutes ago -
It is unlikely but not impossible that it will rain tomorrow.
Which of the following choices...
asked 34 minutes ago -
Consider three capacitors, of capacitance 2000 pF , 7800 pF ,
and 0.013 μF .
Part...
asked 35 minutes ago -
What is the PV of a future sum if: FV = 15000 # of periods =...
asked 43 minutes ago -
T or F?
If in a clustering solution the largest cluster has 1000 members
and the...
asked 49 minutes ago -
What is the role of burning coal in an electrical power
plant?
The heat is converted...
asked 1 hour ago -
Caspian Sea Drinks' is financed with 68.00% equity and the
remainder in debt. They have 10.00-year,...
asked 1 hour ago -
A beam of electrons is accelerated through a potential
difference of 11.0 kV before entering a...
asked 1 hour ago -
Mooncents Coffee Shop has just opened, and on the first 6 days
of business, the number...
asked 1 hour ago -
Description: Operating your business with a business mindset is
the key here. You can only wear...
asked 1 hour ago