As water evaporates from the cooling tower the mineral impurities in the makeup are concentrated in the recirculating water. Cycles of concentration COC describes the relationship between the makeup water rate and the blowdown rate.
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W 01 to 03 percent of C for an induced draft cooling tower W about 001 percent or less of C if the cooling tower has windage drift eliminators Concentration cycles in petroleum refinery cooling towers usually range from 3 to 7.
Cooling tower cycles of concentration. Cooling Tower Cycles of Concentration - YouTube. All of the dissolved ions are left behind to concentrate in the system. Ad Find China Manufacturers Of Cooling Tower.
It is also a measure of the total amount of minerals concentrated in the cooling tower water relative to the amount of minerals in the incoming makeup water. In some large power plants. Click to see full answer.
Heat load ambient conditions and cycles of concentration are the parameters that determine water usage. On other side higher COC increases dissolved solids concentration in cooling tower. Higher COC is indicative of higher water use efficiency.
Total Water used in a Cooling Tower Evaporation Bleed Drift Leaks. As water evaporates from a Cooling Tower it leaves behind dissolved solids. It is always advisable to maintain COC as high as possible to reduce make water requirement.
Cycles of Concentration An important concept related to Cooling Towers is the Cycles of Concentration also known as Cycles or Concentration Ratio. Tower Tech cooling towers can handle COC of 1-2 more than other designs. Drift does not affect the amount of overall water usage.
Factors Limiting Cycles of Concentration. Theoretically evaporation from a cooling tower is pure water. There is a limit to the number of cycles attainable in a cooling tower.
Eventually the cycles of concentration gets too high and the water must be removed or blown down the drain. The COC specifies how often a fresh water added into the loop can be used or pumped around before the water has to blown down or bleed off from the cooling tower. An important concept related to Cooling Towers is the Cycles of Concentration also known as Cycles or Concentration Ratio.
Cooling Tower Efficiency Hot Water Temperature Cold water Temperature x 100 Hot Water Temperature Wet bulb temperature. Cycles of concentration are important as the higher the cycles of concentration the lower the bleed will be since bleed as a percentage of feed water 1 cycles. Higher cycles of concentration as allowed by water chemistry decrease blowdown and water usage.
Drift losses of up to 02 of the recirculation rate in older towers can limit cycles to 5-10. Assume a tower requires a drain down at 4 COC. COC or the Cycles Of Concentration is an abbreviation used when talking about cooling water or cooling tower water.
In practice the cooling tower efficiency will be in between 70 to 75. If playback doesnt begin shortly try restarting your device. Ad Find China Manufacturers Of Cooling Tower.
Concentration ratio is also referred to as the cycles of concentration. What does this mean for water use. Cycles of concentration in the cooling system give the The dissolved and suspended solids in a cooling system remain behind when water evaporates while passing through the cooling tower which reduces scaling tendencies associated with the salts present in the water.
The physical cooling tower selection does not determine water usage. Water is evaporated all of the solids are left behind so they concentrate in the cooling tower water. There are about 15 gallons of water evaporated tn of cooling.
The cycles of concentration normally vary from 30 to 80 depending on the design of a cooling tower. Windage drift and leakage are all sources of unintentional blowdown. It is ultimately saves the water.
C R Specific Ion Concentration in the Recirculation Water Specific Ion Concentration in the Make Up Water. The cycles of concentration or concentration ratio is determined by calculating the ratio between an impurity in the cooling water and the same impurity in. Cycles of Concentration is monitored with a conductivity meter and it is a measure of the concentration of dissolved solids in the Cooling Tower process water.
If we start out with fresh water the tower has one cycle of concentration. These dissolved solids will therefore increase in concentration in the process water until there is a Blow-down. When all the fresh water is evaporated solids are still in the tower the tower then refills itself with more fresh water and we have twice the solids in the tower.
You now can change that to 5-6 COC using Tower Tech.
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