Which part of the three-element feedback system is essential for comparing feed flow with steam flow?

Which part of the three-element feedback system is essential for comparing feed flow with steam flow?

• A. Flow meter
• B. Steam flow/feed flow differential relay
• C. Temperature sensor
• D. Pressure gauge

Answer: (B)

In a three-element feedback system, the steam flow/feed flow differential relay is crucial for comparing the feed flow with steam flow. This relay provides a comparison between the two flows, allowing for accurate control of the system. By measuring the differences in flow rates, the relay helps ensure that the system can maintain stable and efficient operation, responding to any discrepancies between the incoming feedwater and the steam being produced. Other components, like the flow meter, primarily measure flow rates rather than providing a comparative output, while temperature sensors and pressure gauges monitor specific conditions within the system but are not directly involved in the differential evaluation of feed flow versus steam flow. Thus, the steam flow/feed flow differential relay serves as the essential component for effective control in the feedback loop, validating the relationship between the two flows and enabling adjustments as needed for operational efficiency.

In a three-element feedback system, the steam flow/feed flow differential relay is crucial for comparing the feed flow with steam flow. This relay provides a comparison between the two flows, allowing for accurate control of the system. By measuring the differences in flow rates, the relay helps ensure that the system can maintain stable and efficient operation, responding to any discrepancies between the incoming feedwater and the steam being produced.

Other components, like the flow meter, primarily measure flow rates rather than providing a comparative output, while temperature sensors and pressure gauges monitor specific conditions within the system but are not directly involved in the differential evaluation of feed flow versus steam flow. Thus, the steam flow/feed flow differential relay serves as the essential component for effective control in the feedback loop, validating the relationship between the two flows and enabling adjustments as needed for operational efficiency.