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Subject: Re: Variable pressure operation
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Date: 05/11/00 at 10:10 AM
Posted by: Anthony Salvarezza
In Reply to: Re: Variable pressure operation posted by John Popelish on 05/10/00 at 5:15 PM:
Thank you for the reply. I currently utilize a steam flow feed foward to the fuel circuits in the dcs system The unit response is great. I am able to achieve load ramps of 25-50 MW per minute. Pressure ramps can go up to 35 psi per minute. Our units respond well to the load ramps and pressure changes. The problem we are having is the higher primary SH header temperatures. Our sh header designed to a max temp of 960 deg F. The questions I have are in reference to the benifits of variable pressure operation. Heat rate improvement and savings from it. Do you know of any test results or heat rate analysis data that would add to the justification of this type of operation ?
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