Description

This Standard provides guidelines for sampling, conditioning, and analyzing steam and water within power cycle performance testing.

It focuses on ensuring accurate data collection for various power plant components like boilers, turbines, and condensers.

The standard covers sample point selection, sample acquisition, transportation, and conditioning methods. It also addresses the analysis of these samples to determine the cycle chemistry and its impact on overall performance. 

Scope

ASME PTC 19.11-2008 is applicable to: 

• Performance testing of power generation equipment: This includes tests on turbines, condensers, and deaerators, where steam and water quality is crucial for accurate performance assessment.
• One-time acceptance testing and continuous performance monitoring: The standard provides guidance for both initial acceptance testing and ongoing monitoring of cycle chemistry.
• Various steam and water streams: It covers makeup water, feedwater, steam, and condensate samples within the power cycle.
• Design and operation of sampling systems: The standard offers recommendations for designing and operating systems used for monitoring cycle chemistry.
• Other influent and effluent streams: While primarily focused on the steam and water cycle, the recommended methods may also be useful for monitoring other streams in the power plant.

Key areas addressed by the standard

• Sample Point Selection: Determining appropriate locations for taking representative steam and water samples. 
• Sample Acquisition: Establishing procedures for obtaining samples without contamination or alteration. 
• Sample Transportation: Providing guidelines for transporting samples from the collection point to the analysis location. 
• Sample Conditioning: Outlining methods for preparing samples for analysis, including pressure and temperature control. 
• Sample Analysis: Specifying techniques and instrumentation for analyzing the chemical composition of the samples. 
• Uncertainty: Addressing the potential sources of error in the sampling and analysis process. 
• Cycle Chemistry Monitoring: Providing guidance for understanding and managing the chemical characteristics of the power cycle.