Articles
The Role Of Dissolved Oxygen And ORP Measurements In Power Plant Chemistry
July 31, 2008
•White Paper: The Role Of Dissolved Oxygen And ORP Measurements In Power Plant Chemistry
By Mettler-Toledo Thornton, Inc.
ORP (oxidation reduction or redox potential) and DO (dissolved oxygen) measurements can provide valuable information in makeup water treatment, cycle chemistry control and stator coolant. Taking the time to understand the principles of operation of these sensors is a worthwhile effort to help specify appropriate equipment and to obtain successful results with it. This discussion describes the various applications for DO and ORP measurements in power plants. It then provides detail on the significance of these measurements and operation of the sensors.
With the variety of cycle chemistry schemes now being used in power plants around the world, there is some ambiguity about the monitoring requirements and their significance. Here follows a brief review of cycle chemistry water treatment regimes identified by the Electric Power Research Institute and two key measurements used to monitor them: dissolved oxygen (DO) and oxidation reduction or redox potential (ORP). The use of ORP and dissolved oxygen measurements in makeup water treatment and dissolved oxygen in stator cooling are also covered. The techniques for making these measurements are described along with practical considerations in applying them.
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•White Paper: The Role Of Dissolved Oxygen And ORP Measurements In Power Plant Chemistry
