Water quality testing programme for cooling water in large generators

The synopsis of project

The water quality testing instruments in Erun's large-scale generator cooling water quality testing programme are in line with 'GB/T 6904' Determination of PH in Industrial Circulating Cooling Water and Boiler Water; 'GB/T 6908' Methods of Analysis for Boiler Water and Cooling Water.Determination of conductivity; 'GB/T 12157' Determination of dissolved oxygen in industrial circulating cooling water and boiler water; 'GB/T 13689' Determination of copper in industrial circulating cooling water and boiler water;

The contents of project

Parameters and standard values for cooling water quality testing in large generators:

1、Water quality control standards for generator stator hollow copper conductor cooling water:

PH（25℃）

conductivity（25℃）

μS/cm

copper content

(CU)μg/L

dissolved oxygen

(DO)μg/L

8.0-9.0

0.4-0.2

≤20

7.0-9.0

≤30

2、Water quality control standards for cooling water in dual water-cooled generators:

PH（25℃）

conductivity（25℃）

μS/cm

copper content

μg/L

expected value：8.0-9.0

＜5

≤40

standard value：7.0-9.0

3、Water quality control standards for cooling water within the stainless steel hollow conductor of the generator stator:

PH（25℃）

conductivity（25℃）

μS/cm

6.5-7.5

0.5-1.2

List of instruments for testing cooling water quality in large generators:

serial number	model number	name	Detection range	photograph
1	ERUN-ST3-PL	Benchtop Touch Screen PH Acid Meter	-2.000-18.000 pH
2	ERUN-ST3-A4	Touch screen micro conductivity tester	0.0000～2.0000）μS/cm and（0.000～20.000）μS/cm
3	ERUN-ST3-H6	Trace Copper(Cu) Content Analyser	(0.0～200.0)μg/L
4	ERUN-SP3-A5	Micro Dissolved Oxygen (DO) Analyser	0-100μg/L

In summary, generator cooling water quality testing is an important part of ensuring the stable operation of the power generation system.By choosing appropriate testing methods, conducting regular water quality testing and taking corresponding treatment measures, the normal operation of the generator can be effectively guaranteed and its service life can be extended.