Mar 30, 2015 · Cycles of concentration (COC) is defined by the ratio of the dissolved solids in the tower water to the dissolved solids in the makeup. This is easily and commonly determined by taking the specific conductance of the cooling water and dividing it by the conductance of the makeup.
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Mar 30, 2015 · CYCLES OF CONCENTRATION. Cooling towers achieve their purpose by rejecting waste heat to the atmosphere by latent and sensible heat transfer. Approximately 0.1% of the water that flows through the cooling tower is evaporated for every 1 degree temperature drop across the tower. The water that is evaporated is pure.
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Blowdown in Boiler Definition. Blowdown in Boiler, Usually, water which is fed to the boiler contains high Total Dissolved Solids (TDS) content as well as other dissolved and undissolved solids in it. On heating water or converting water to steam, these dissolved solids do not evaporate and gets separated from water or steam and settled at the bottom of the shell.
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Jun 01, 2017 · As a steam boiler's cycles of concentration are increased, plants can make more steam with the same amount of feedwater. The limit on the number of cycles of concentration determined by the feedwater quality: The purer the feedwater, the more cycles that can be achieved, and the more steam that can be produced without having to inject supplemental water.
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What is boiler modulation and boiler cycling? - HeatGeek
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A typical boiler sludge conditioner, for example, might be designed to be maintained at 200 ppm as product in the boiler water. This would be a good fit, for example, for an 800 horsepower (HP) boiler producing 20,000 pounds of steam per hour at 15 feedwater cycles of concentration.
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Mar 07, 2017 · Surely the cycles of concentration cannot be 4 (0.080/0.020). To calculate the correct CoC for this system, what else do you need to know (assume no flow measurement is …
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The Importance of Boiler Water and Steam Chemistry. Steam Purity. Purity or chemistry requirements for steam can be as simple as a specified maximum moisture content, or can include maximum concentrations for a variety of chemical species. Often, for low pressure building or process heater steam, only a maximum moisture content is specified.
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Feb 28, 2019 · Microsoft Word – Johnston Boiler Company Boiler Glossary GUIDELINES FOR BOILER BLOWDOWN AND CYCLES OF CONCENTRATION The calculation for cycles of concentration is: Cycles = Concentration of dissolved solids in the boiler water Concentration of solids in the boiler feedwater The above calculation assumes that all dissolved (ionized) solids in the feedwater remain dissolved in the boiler …
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Nov 03, 2006 · CC Concentration cycles BOILER BLOWDOWN RATE What is the boiler blowdown rate for a 10,000#/hr boiler working at 8.6 cycles of boiler water concentration? BR = (1 / CC) * BC . Steam Boilers & Appurtenances, Combustion & Instrumentation Controls, Deaerators, Exhaust Systems, Heat
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Cycle of Concentration of Boiler Water What is the cycle of concentration if the chloride content of boiler water is 186 ppm and the feedwater chloride content is 38 ppm? CYC = Bch/FCh
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Cycles = Concentration of dissolved solids in the boiler water Concentration of solids in the boiler feedwater The above calculation assumes that all dissolved (ionized) solids in the feedwater remain dissolved in the boiler water. This is not normally possible due to the solubilities of the minerals in the feedwater being exceeded in the boiler water and thus precipitating out of solution as solids.
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A 5000 gpm recirculating cooling water system with a 10 degree F water temperature drop through the tower is operating at 3 cycles of concentration but could safely operate at 4 cycles. That tower would use 3,000,000 gallons of fresh makeup water more than necessary in a …
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boiler water. Aprobe provides feedback to a controller driving a modulating blowdown valve. An alternative is proportional control —with blowdown rate set proportional to makeup water flow. Cycles of Concentration "Cycles of concentration" refers to the accumulation of impurities in the boiler water. If the boiler water contains ten times
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Minimize Boiler Short Cycling Losses
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Cycles of concentration (C) = Makeup (MU) / Bleed (B) Cycles of concentration are also estimated by the ratio between specific conductance of the cooling water and the makeup water. From these relationships, the amount of bleed required to maintain a specific cycle of concentration is determined by: Bleed (B) = Evaporation (E) / (Cycles (C) – 1)
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Apr 17, 2014 · The objective is to control the cycles of concentration (accumulation of impurities). A boiler cycle is the number of times TDS present in feedwater can concentrate. For example, 100 TDS feedwater, cycled five times, would result in 500 TDS. Conductivity method: Cycles = boiler water conductivity feedwater conductivity
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As a result, cycles of concentration play a big part in minimizing water usage and maximizing water conservation for these systems. The higher the cycles of concentration, the less water that is lost from the system in the form of blowdown. Small increases in the cycles of concentration can mean huge savings in: daily makeup water; bleed water
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Make-up Water = Evaporation + Blowdown + Drift + Leaks/Overflows. Cycles of Concentration. An important concept related to Cooling Towers is the Cycles of Concentration (also known as Cycles or Concentration Ratio). Cycles of Concentration is monitored with a conductivity meter and it is a measure of the concentration of dissolved solids in the
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Equation 3. Cooling Tower Cycles of Concentration Based on Conductivity Cycles of Concentration = Conductivity (TDS) of Blowdown Water Conductivity (TDS) of Make-Up Water . Since TDS enter the system in the make-up water and exit the system in the blowdown water, the cycles of concentration are also approximately equal to the ratio of volume o
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