Power Plant Water Monitoring

Demineralised water is essential in water-steam cycles and is often treated with specific chemicals to maintain system stability. These controlled chemical processes help preserve protective metal oxide layers and prevent gradual wear and corrosion of components exposed to water.

With more than 30 years of expertise, Swan Analytical provides a wide range of online instruments designed to monitor and control water quality across various systems, including steam cycles, auxiliary setups, demineralised water or polisher plants, process condensates, and cooling water cycles.

Understanding the importance of accurate, continuous measurements, Swan focuses on delivering reliable, low-maintenance instruments that ensure optimal water quality and the safe operation of all associated facilities.

Typical Instrumentation in Power and Steam Applications

1	Raw Water Intake	pH UV₂₅₄ (Organics Trend) Turbidity Disinfectant
2	Demineralised Water Treatment Plant	pH Sodium Silica Total Organic Carbon UV₂₅₄ (Organics Trend) Turbidity Disinfectant
3	Demineralised Water Outlet	Specific Conductivity Total Organic Carbon Silica Sodium
4	Process Water Treatment Plant	pH Specific Conductivity UV₂₅₄ (Organics Trend) Turbidity Disinfectant
5	Make-up Water	Specific Conductivity Silica Sodium
6	Condensate	pH Conductivity After Cation Exchange Sodium Dissolved Oxygen Specific Conductivity Degassed Conductivity After Cation Exchange Hydrazine (or CH₆N₄O Carbohydrazide) Turbidity
7	Condensate Polisher Outlet	Conductivity After Cation Exchange Sodium Specific Conductivity Silica
8	Feedwater	pH Value Specific Conductivity Conductivity After Cation Exchange Dissolved Oxygen Dissolved Hydrogen Hydrazine (or CH₆N₄O Carbohydrazide) Oxidation/Reduction Potential Turbidity
9	Boiler Water	pH Specific Conductivity Conductivity After Cation Exchange Sodium Silica Phosphate Turbidity
10	Saturated Steam	Conductivity After Cation Exchange Sodium Dissolved Hydrogen
11	Superheated / Reheated Steam	Conductivity After Cation Exchange Sodium Degassed Conductivity After Cation Exchangen Silica Dissolved Hydrogen
12	Cooling Water	pH Value Specific Conductivity Disinfectant Phosphate Turbidity
13	Return Condensate	pH Value Conductivity After Cation Exchange Specific Conductivity Degassed Conductivity After Cation Exchange Sodium Silica Dissolved Oxygen Turbidity
14	Effluents / Wastewater	pH Value Specific Conductivity Turbidity Phosphate Dissolved Oxygen

* Italics indicates optional parameters depending on water quality, water treatment process, power plant configuration, operation mode, metallurgy and chemical treatment applied

Steam and Water Analysis System – SWAS

A Steam and Water Analysis System (SWAS) plays a vital role in monitoring and analysing the quality of water and steam in power generation facilities. Central to this system is the SWAS panel, which houses the essential instruments and controls for continuous sampling and analysis of critical water and steam parameters. These parameters are key to optimising power plant performance, reducing corrosion, and preventing scale buildup.

Swan Analytical New Zealand excels in delivering tailored solutions for water and steam analysis systems (SWAS). With our expertise, we help power generation facilities achieve peak efficiency, protect system integrity, and meet industry standards with confidence.