power generation using steam Turbines

[josy]

Hi,

     Iam working in a project for simulation of power generation plant using steam turbines.I studied the fundamentals of power generation using steam turbines.I would like to know whether anyone have any sample VIs or any study materials to know how to simulate it in labview.

The second thing is,how to make the front panel apperance,that is a boolean indicator in the form of a valve.I have seen that in examples shipped with labview.How it can be done??

Also Iam not sure whether it is  the right place to raise this question.(Labview board).

[josy]

Hi,

     No ideas and suggestions??

[GerdW]

Hi josy,

your question is rather vague: "how to simulate it in labview"...

Simulate what?

Do you want to incorporate a complete (thermo-mechanic) model of a steam engine power plant?

Or do you just want to have y picture of the engine with some measurement values shown at the right places?

"how to make the front panel apperance,that is a boolean indicator in the form of a valve."

Well, I guess the front panel should be more than just a boolean indicator with the look of a valve...

You can:

- look at the DSC toolkit. It already has controls drawn as valves, pipes and so on...

- customize your own controls for any look you want. How to do is described in the LabVIEW help...

[josy]

---

Do you want to incorporate a complete (thermo-mechanic) model of a steam engine power plant?

---

Yes...How can it be possible?Can you give me some tips to start?

and you wrote:you just want to have y picture of the engine with some measurement values shown at the right places?

How it can be??just measurement values?

[GerdW]

Hi Josy,

you still don't give a full explanation on what you really want to do...

"Yes...How can it be possible?"

Well, usually you simulate such engines with the help of full-blown FEM software. Do you already have such a model?

"How it can be??just measurement values?"

You place a picture on your front panel. Then you place some indicators on your front panel. Then you display the measurement values taken by your DAQ hardware in those indicators. Quite easy, don't you think?

But as said before: your questions are very vague. You don't ask for specific help. You just as for generic information and all you will get are generic answers...

[josy]

Hi GerdW,

               I will explain in detail.we got a powerplant overview that is a picture consists of boiler,turbine,condensor and all.And we are trying to make it work just like a power plant works.I don't have FEM softwares.Can we download it and install?Can you give me some information regarding that?

-The second method you told about displaying the measurement values taken by our DAQ hardware in the indicators, that I understand but what will we give as fuel input??How a turbine works?That I can't understand... 

[josy]

Hi GerdW,

                Please give me a reply:mansad:

[GerdW]

Hi Josy,

it seems to me you need to go through some basic LabVIEW courses. They are offered (for free!) on the NI website...

Then:

- You should create a more detailed plan of what you really want. "Simluating a power plant" is still quite vague...

- You can google for "FEM software". There are several companies selling such software - you should consider to pay 10k$+...

[AndyClegg]

Josy,

When building any sort of model, the first question you need to understand is what is the model to be used for - this then dictates the scope / accuracy of the model and what assumptions can be made. For example, does it need to model steady-state conditions only, does it need to model transient or start-up conditions.

Gather the data information you have - with data being both time history of variables, and information about the working of the system you are modeling (e.g.. steam tables, steam turbine operating curves).

Then you need to define the boundaries - what are inputs to model (you want to change in model to see effect of) and what are outputs (you want to look at)

Then you need to define internal variables and relationships between them, using assumptions previously defined. Relationships can be simple static relationships or much more complicated - e.g.. a steam turbine could be modeling a set of operating curves, an inertia/load and the governor/control. It could go much more detail, or it could be represented by a much simpler box - it depends upon what you want to do with the model. If you don't have certain bits of data you may need to estimate or make an educated guess - and revisit if validation is not so good. In addition to building physics-based mathematical relationships between variables, you can also extract relationships from data (e.g. system identification, finite step response etc). There are many other types of model possible - finite element, neural net-based, the correct choice being down to what you have and what you want to get.

Then you need to validate against data (or common sense if no data available). If you don't get a good validation then you need to refine the model to make it more representative. Start with a simple model, with lots of assumptions and this stage will show if it needs refining. This step is all about judgment as to what is fit for purpose.

Building a high-fidelity model from scratch can take a lot of time and effort, even for people who are very experienced. If you just need something basic / non-specific, then I am sure there are references with public models (i.e.. the maths bit), which you just then need to code up in LabVIEW.

I hope this helps,

Andy