temp rise across boiler

[daveaf]

What temp differential should I expect to see across my Wickes 50 balanced flue boiler.

I think I "may" have inadvertantly moved the pressure regulator nut so I just want to make sure that my boiler is not firing too hard now.

 

[twgas]

what pressure regulator nut would that be then?

 

[Slugbabydotcom]

Now you've done it! You need a coRGI round to set your gas pressures up now

 

[EliteHeat]

I think I "may" have inadvertantly moved the pressure regulator nut

As you do!

 

[bengasman]

i hope you are not talking about the gas pressure/ burner pressure

 

[bengasman]

and what relation do you think there is between the ? pressure ? and the temperature differential?

even then, without a (2 channel) differential thermometer the info would be of little use

 

[daveaf]

As you may have seen from my previous thread, Ive had all sorts of problems with my boiler which i have finally sorted out, however I did in the process, move the burner pressure up and down whilst trying to keep the thing alight. Ive put it back to where it was but was just curious how much temp the water should pick up across the boiler. Obviously with a higher burner pressure you will get bigger flames and bigger flames will increase the heating across the boiler. Ive set it up as low as it will go without tripping out to be on the safe side until i can get a manometer from work and set it up again.

Oh and yes I do have a 2 channel temp reader. I agree im not corgi, but I am a development engineer for gas turbines so I work on gas and combustion systems every day.

Thanks for everybodies help over the past few days.

 

[Agile]

Dont expect anyone reading this to remember anything about anything you have posted before. Thats why its better to stick tot he same thread so we can see the whole history.

If thats an old cast iron exchanger boiler then the design diff temp was 11°.

However, thats totally dependent on the water flow rate so you dont set the gas input for a particular diff temp.

You set the burner pressure to match the manufacturer's specs and the check the volume of gas being used.

How do you adjust the mixture on a Trent 1000 ?

Does the water injection on the WLE versions alter the combustion characteristics or is it just a way to get a large volume of vapour?

Tony

 

[daveaf]

The engine you have referred to is an aero jet engine, I work on gas turbine generators producing 140 odd megawatts.

 

[Agile]

OK then, but a Trent 60 is designed to be used on generators.

So how is the mixture adjusted?

And how is that mixture adjusted during operation for different incoming air temperatures for example.

Tony