Recent content by krush

Check your O&M manual for the turbine. They often have flow curves in them that correspond steam flow to various stage pressures.

This is the best "simple" source I found that explains droop and governing/power system fundamentals. Woodward Reference Manual Governing Fundamentals and Power Management: Manual 26260 http://www.otherpower.com/images/scimages/3409/Governing_Fundamentals_and_Power_Management.pdf

This is what the original company that makes the turbine spends lots of time figuring out! If it were very simple, everybody would do it. The basis of loading and temperature change rates is nothing more than good old machine design. As the metal temperature changes, it's size changes...

We need to know what type of control system your steam turbine has. Also, if you could state the manufacturer that would help. Different OEM's use slightly different control strategies. The responses here look to be mostly for GE units. ALSO: We need to know if you unit is (MHC) mechanical...

The wobulator I've dealt with is in place to to make the RPM "wobble" when running the unit at an RPM other than designed RPM (design usually being 3600 or 3000). For example when starting and warming up a 3600rpm steam unit, it is common for the startup instructions to have a hold point at...

Your desire to learn about supercritical operations is a very large undertaking for this forum. Many of the plant operations are the same, but as you know a supercritical boiler is going to be a once-through. Water chemistry is important. Pressure control is different...usually done with...

There are lots of inexpensive USB Data Acquisition solutions (DAQ)...google USB DAQ. I got one back in 2008 for $50 to make a simple little project in college. For example, this company has quite a few options: http://www.audon.co.uk/ However, I reply with a question asking WHY? Modern...

>What type of valve is a "steam turbine extraction valve"? Which make actuators are generally used? How does it function?< It depends on the valve design the manufacturer used. I've seen spool valves and grid valves used for extraction valves (GE terms and design). Extraction valves are...

Fair enough. Then sounds like you want a PLC or something of that like. For another example see this link. Obviously other manufactuers may have similar products. Look at the DirectLogic 05 and the ethernet/modbus module...

If I understand your problem correctly, it is easily solved by off the shelf components. I know it isn't as sexy as making your own, but it's much less expensive. See links below for some (but definitely not all) solutions. http://www.woodward.com/easygen3000series.aspx...

>I have a question about thermal power >plant. Is HP bypass flow necessary to >control in power plant? If we don't use >it, how do we measure the flow? Your question is not specific enough to give a useful answer. HP bypass is usually found on combined cycle plants. I have yet to see a...

The OEM will almost always say that "your system is obsolete and must be upgraded". And the beauty of the world is that there are often independent third party outfits that will still support the old control systems. http://www.gasturbinecontrols.com/ is one that I know of (no affiliation)...

I agree with above. He used the term "flame safety". I grew up with it being called "burner management system". Same components, just called by different names. The makeup of the system is usually specified by local or national code. For instance, in the USA a few codes including NFPA...

I do not see the reasoning for 2 to 3 days of operation required before doing an overspeed test. However, I have not seen ever steam turbine in the world and there may be some special reason that the manufacturer stated. Your unit should have a startup curve that has instruction and...

The short answer is YES!