COOLING TOWER PERFORMANCE
Describe in detail the methods used for preventing carry over losses and fog formation from cooling towers.
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COOLING TOWER PERFORMANCE
The cooling tower in a power plant consists of ten big fans. The quantity of cooling water circulated through the tower is 1000kg/min and it is cooled from 35oC DBT and 25oC WBT. The air leaves the tower at 30oC and 90% R.H. Find: (i) The quantity of air handled per fan per minute.(ii) The quantity of make-up water per hour neglecting the loss due to carry over and heat losses.
One application of pump systems is in cooling towers. Cooling towers reject heat from the chiller...
One application of pump systems is in cooling towers. Cooling towers reject heat from the chiller condenser to the atmosphere (act as reservoirs). Parallel condenser pumps are used in large chilled water systems to decrease operating costs and for redundancy. Use the following system to select Armstrong pumps for the cooling system. The performance curve of an individual pump is given as He = 75-0.75Q?, where head is in feet and flowrate is in cfs. Remember to leave one pump...
Water is often used for cooling processes. Usually it is recycled and comes from cooling towers so the water is usually...
Water is often used for cooling processes. Usually it is recycled and comes from cooling towers so the water is usually only available at 80°F for cooling. Bypasses are often used for control purposes. The following is an abstraction of the cooling process of a plant. 8.(4) (Note, the +Q's are heat generated by the system to be transferred to the cooling water, -Q's are removed from the cooling water) 50,000 0-100.000 Btu/min Fl 500 lb/min T80°F F9-0.75 F8 If...
Water is often used for cooling processes. Usually it is recycled and comes from cooling towers so the water is usually...
Water is often used for cooling processes. Usually it is recycled and comes from cooling towers so the water is usually only available at 80°F for cooling. Bypasses are often used for control purposes. The following is an abstraction of the cooling process of a plant. 4) (Note, the +Q's are heat generated by the system to be transferred to the cooling water, 's are removed from the cooling water) 4 Dg) Btu/min Fl 500 lb/min TI 80°F F9 =0.75...
39) As mentioned in class, the convex shape of the cooling tower at a power plant...
39) As mentioned in class, the convex shape of the cooling tower at a power plant (e.g., Davis-Besse) maximizes surface area. Besides cooling the effluent from the turbines, name the one other thing done to it by the tower to prevent the effluent from causing environmental harm? [1 point] [1 point] True or False? It is not possible for a solution to have a pH of 0.0 (zero). [1 point] 41) True or False? Dative bonding occurs when both atoms...
Cooling tower is a special recycling device which applies the heat rejection process. Figure Q4 (a)...
Cooling tower is a special recycling device which applies the heat rejection process. Figure Q4 (a) shows the cooling tower system that extracts waste heat to the atmosphere through the cooling of a water stream to a lower temperature. Sketch the water recycle in the cooling tower Q4 (a) (5 marks) High leaving water temperature will cause a drop in process cooling efficiency, increasing system power consumption, creating physical discomfort to people within an air-conditioned area, and have a detrimental...
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...
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:
The figure below shows a condenser/cooling tower pipe system needed to remove heat from a water...
The figure below shows a condenser/cooling tower pipe system needed to remove heat from a water cooled refrigeration condenser and reject the heat to the atmosphere. The amount of heat to be rejected to the atmosphere is 480,000 Btu/hr. The water enters the condenser at 85"F, and the temperature rise of the water through the condenser is 10°F. The total length of the piping in the system is 60 ft. Fittings are as shown. Assume bends to be as shown...
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...
One application of pump systems is in cooling towers. Cooling towers reject heat from the chiller condenser to the atmosphere (act as reservoirs). Parallel condenser pumps are used in large chilled water systems to decrease operating costs and for redundancy. Use the following system to select Armstrong pumps for the cooling system. The performance curve of an individual pump is given as He = 75-0.75Q?, where head is in feet and flowrate is in cfs. Remember to leave one pump...
Water is often used for cooling processes. Usually it is recycled and comes from cooling towers so the water is usually only available at 80°F for cooling. Bypasses are often used for control purposes. The following is an abstraction of the cooling process of a plant. 8.(4) (Note, the +Q's are heat generated by the system to be transferred to the cooling water, -Q's are removed from the cooling water) 50,000 0-100.000 Btu/min Fl 500 lb/min T80°F F9-0.75 F8 If...
Water is often used for cooling processes. Usually it is recycled and comes from cooling towers so the water is usually only available at 80°F for cooling. Bypasses are often used for control purposes. The following is an abstraction of the cooling process of a plant. 4) (Note, the +Q's are heat generated by the system to be transferred to the cooling water, 's are removed from the cooling water) 4 Dg) Btu/min Fl 500 lb/min TI 80°F F9 =0.75...
39) As mentioned in class, the convex shape of the cooling tower at a power plant (e.g., Davis-Besse) maximizes surface area. Besides cooling the effluent from the turbines, name the one other thing done to it by the tower to prevent the effluent from causing environmental harm? [1 point] [1 point] True or False? It is not possible for a solution to have a pH of 0.0 (zero). [1 point] 41) True or False? Dative bonding occurs when both atoms...
Cooling tower is a special recycling device which applies the heat rejection process. Figure Q4 (a) shows the cooling tower system that extracts waste heat to the atmosphere through the cooling of a water stream to a lower temperature. Sketch the water recycle in the cooling tower Q4 (a) (5 marks) High leaving water temperature will cause a drop in process cooling efficiency, increasing system power consumption, creating physical discomfort to people within an air-conditioned area, and have a detrimental...
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...
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:
The figure below shows a condenser/cooling tower pipe system needed to remove heat from a water cooled refrigeration condenser and reject the heat to the atmosphere. The amount of heat to be rejected to the atmosphere is 480,000 Btu/hr. The water enters the condenser at 85"F, and the temperature rise of the water through the condenser is 10°F. The total length of the piping in the system is 60 ft. Fittings are as shown. Assume bends to be as shown...
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...
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