Degas conductivity
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Typically, there are three major types of conductivity measurements used: |
Typically, there are three major types of conductivity measurements used: |
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* Specific conductivity, a measurement that indicates the [[total dissolved solids]] in an aqueous solution |
* Specific conductivity, a measurement that indicates the [[total dissolved solids]] in an [[aqueous solution]] |
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* Cation conductivity, a measurement taken after the water sample has flowed through a resin bed (known as a cation exchanger) |
* Cation conductivity, a measurement taken after the water sample has flowed through a resin bed (known as a cation exchanger) |
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*[https://www.forbesmarshall.com/Portals/0/downloads/swas/Application%20Note_Reduce%20Startup%20Time.pdf Degas conductivity], a measurement taken after the water sample has flowed through a resin and has had carbon dioxide removed by a degassing process |
*[https://www.forbesmarshall.com/Portals/0/downloads/swas/Application%20Note_Reduce%20Startup%20Time.pdf Degas conductivity], a measurement taken after the water sample has flowed through a resin and has had carbon dioxide removed by a degassing process |
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In the case of a traditional base load power plant, cycling is much less frequent—in some cases, only twice annually for maintenance. Compared with measuring only cation conductivity, the cost savings from an accelerated start-up using degas conductivity is potentially very large. At $0.50/MW-minute ($30/MWH), a 750MW coal plant starting three hours faster each cycle could theoretically generate an additional $133,875 of annual revenue from the same fuel. |
In the case of a traditional base load power plant, cycling is much less frequent—in some cases, only twice annually for maintenance. Compared with measuring only cation conductivity, the cost savings from an accelerated start-up using degas conductivity is potentially very large. At $0.50/MW-minute ($30/MWH), a 750MW coal plant starting three hours faster each cycle could theoretically generate an additional $133,875 of annual revenue from the same fuel. |
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Based on similar assumptions, the cost savings between different degassing methodologies is significant. If a dynamic system similar to Gronowski's is used, in the nearly 30 minutes of start-up time saved over a reboiler method, the typical combined cycle plant will generate even more income from the same fuel consumed with each and every system start, especially using typical “peak” electricity pricing. Additional benefits are better energy efficiency and reduced emissions of heat and exhaust. |
Based on similar assumptions, the cost savings between different degassing methodologies is significant. If a dynamic system similar to Gronowski's is used, in the nearly 30 minutes of start-up time saved over a reboiler method, the typical combined cycle plant will generate even more income from the same fuel consumed with each and every system start, especially using typical “peak” [[electricity pricing]]. Additional benefits are better energy efficiency and reduced emissions of heat and exhaust. |
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Degas Cation conductivity instruments are designed for measurement of all three conductivity Values (Specific, Cation and Degas Cation Conductivity) and also provides output for calculated pH and calculated {{CO2}} in Feed water or Condensate. |
Degas Cation conductivity instruments are designed for measurement of all three conductivity Values (Specific, Cation and Degas Cation Conductivity) and also provides output for calculated pH and calculated {{CO2}} in Feed water or Condensate. |
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