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The temperature specified is really the turbo fumes temp of diesel generator.

Your welcome hope it was some assistance. Good luck!

Thank you all for your valuable time n response

Originally Posted by mohsinrkhan86

Lol. Thats right. I do agree with you. I will make choice with this consideration.

Good for you! Better to not get a letter requesting (officially) you report to court to answer for a dozen folks dieing when the building burned down.

The problem with our system in the USA is... the lawyers make WAAAY too much $$$ in a court of law deciding what the facts are; whether it was done to manufacturer's specs or something else. Us Americans REALLY NEED to address these prima-donna's (spoiled children with attitudes in adult bodies) called lawyers.

Originally Posted by ga-hvac-tech

Lessee...

Here in the USA... one MUST install things according to manufacturer's specifications... or deal with the liability of what happens if they do not. There is a reason for this:

Lets say this flue pipe (exhaust pipe) is installed incorrectly (does not matter how, just that it is not installed to the manufacturer's specifications... THAT is the ONLY thing that matters). Now lets say a fire is started and someone (or lots of folks) get injured or killed. Who is gonna be liable?

Bottom line it is a simple (and legally binding) decision:

If the pipe was installed to the manufacturer's specifications... then the manufacturer is liable... however:
If it is installed ANY other way (regardless of what the way or what the reason)... then whomever was associated with deciding how to do it and/or who did it... is liable...

Now I do not want to bust your b*lls... however do YOU want to be liable... or would you rather the manufacturer be liable? Simple, right?

Here in the USA, this legal system keeps folks honest and stops folks from being 'cheap'...

Lol. Thats right. I do agree with you. I will make choice with this consideration.

Originally Posted by mohsinrkhan86

Does it mean that you have seen similar system somewhere but there was no fan used for exhaust?

Lessee...

Here in the USA... one MUST install things according to manufacturer's specifications... or deal with the liability of what happens if they do not. There is a reason for this:

Lets say this flue pipe (exhaust pipe) is installed incorrectly (does not matter how, just that it is not installed to the manufacturer's specifications... THAT is the ONLY thing that matters). Now lets say a fire is started and someone (or lots of folks) get injured or killed. Who is gonna be liable?

Bottom line it is a simple (and legally binding) decision:

If the pipe was installed to the manufacturer's specifications... then the manufacturer is liable... however:
If it is installed ANY other way (regardless of what the way or what the reason)... then whomever was associated with deciding how to do it and/or who did it... is liable...

Now I do not want to bust your b*lls... however do YOU want to be liable... or would you rather the manufacturer be liable? Simple, right?

Here in the USA, this legal system keeps folks honest and stops folks from being 'cheap'...

Originally Posted by Freightshaker

I am not the guy to size it for you. I do not have enough experience in that department. I turn wrenches on big diesels as a hobby. Just trying to help you out since the facility I was at had a typical indoor setup that I could take pictures of. I would like to also learn about this and further assist you. Any more info on your generator you could give me would be helpful for me to help you. I honestly have never heard of an additional fan in this application. Proper sizing and the turbo should blow it right out I would think.

Does it mean that you have seen similar system somewhere but there was no fan used for exhaust?

I am not the guy to size it for you. I do not have enough experience in that department. I turn wrenches on big diesels as a hobby. Just trying to help you out since the facility I was at had a typical indoor setup that I could take pictures of. I would like to also learn about this and further assist you. Any more info on your generator you could give me would be helpful for me to help you. I honestly have never heard of an additional fan in this application. Proper sizing and the turbo should blow it right out I would think.

Originally Posted by Freightshaker

What if pictured is probably 40' worth of pipe and the turbocharger on this one does well enough to push the exhaust. You need to talk to your dealer or the engines tech support. DO NOT TAKE MY WORD for it. I am just trying to show you how typically the exhaust is ran. That is a high dollar machine and the plumbing is not cheap either. Do it right the first time so you don't royally screw up.

Thanx again. Yeah i will however try consulting the technical person from the perkins team.
Its actually a perkins diesel generator.
Can you just say about the pipe material and specs to be considered as per your assumtion and experience. Just for an idea. (will however confirm with the mnfrer.)

What if pictured is probably 40' worth of pipe and the turbocharger on this one does well enough to push the exhaust. You need to talk to your dealer or the engines tech support. DO NOT TAKE MY WORD for it. I am just trying to show you how typically the exhaust is ran. That is a high dollar machine and the plumbing is not cheap either. Do it right the first time so you don't royally screw up.

What engine? I am assuming it is turbocharged. Make sure to have vibration isolation like in the picture. Well insulated pipe will help the exhaust scavenge also. You need to make some calls about the exhaust sizing. Also the mufflers used for this if you are using one are not something like on a tractor.

Originally Posted by Freightshaker

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I do not know how big your engine is but here is a 855 cummins on a 300kw Onan genset. Think it is 6" off the turbo and bumps up to an 8". Don't think you can run with these measurement I don't know what you have. Talk to manufacturer or dealer. The muffler is mounted on the ceiling and exits out the side of building. It is all heavily fiberglass insulated. Since this generator is on an exterior wall you can see the fresh air intake and radiator are right there close. Sometimes fresh air must be piped to the intake and sometimes radiators are mounted remotely outside. Sizing of the exhust is important so you do not harm your engine. Ring those phones and read those books!

Thanx heaps for this helpful response.
The outlet size of gen is 8" and we will use 12" pipe connected to it. And the pipe will directly run outside the room above false ceiling to discharge the exhaust air to atmosphere.
Tha gen is perhaps 500kw. I just want to confirm if we need any fan to pull exhaust or the exhaust will itself carry out. As the exhaust is 118cu.m/min which is high and pipe size being small, the velocity will be enough to clear 13m distance.
Please comment.

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I do not know how big your engine is but here is a 855 cummins on a 300kw Onan genset. Think it is 6" off the turbo and bumps up to an 8". Don't think you can run with these measurement I don't know what you have. Talk to manufacturer or dealer. The muffler is mounted on the ceiling and exits out the side of building. It is all heavily fiberglass insulated. Since this generator is on an exterior wall you can see the fresh air intake and radiator are right there close. Sometimes fresh air must be piped to the intake and sometimes radiators are mounted remotely outside. Sizing of the exhust is important so you do not harm your engine. Ring those phones and read those books!

Originally Posted by mohsinrkhan86

I wish mr.craig come up with a solution for my query !!

Sorry, I don't really know anything about the construction of exhaust systems. My original comments were just based on what I've seen installed over the years.

Hmmm...

About 13 meters (around 40 ft US) is a fair run for a flue (what we call an exhaust pipe from a stationary fuel burning appliance). Flue engineering is VERY complicated... more going on than meets the common thought process.

I would definitely contact the manufacturer on this... and while you are at it; do you have enough MUA; that is 'make up air'? MUA is the air which MUST come in to displace the exhaust going out. This is a zero sum game, if you do not have enough air coming in... well your diesel generator will choke and quit. Another thing to verify with the manufacturer is BTU's of heat you need to exhaust to cool the engine.

I am not being difficult; just trying to get you to realize you are asking for trouble if you do not think out these things and find solutions that work.

Good luck!

The mfg should have all this info in the install doc,s or be able to provide on short notice.There is a lot of knowledge on this site but asking to design a fix for this problem,this late in the job, should be on the people who sold and installed said gen. Or maybe do not buy the same brand again.

Originally Posted by motoguy128

+1 anytime I've seen this done its vented outdoors directly. Unless its a really long run, you should be able to size a flexible ss pipe designed for this application.

This can basically be treated the same add a oil boiler....except ours a positive displacement pump so you need a heavier duct/pipe. A diesel vs. tolerate some backpressure. Its common to use those small flappers on to of the stacks to keep rain out.

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Ya its not a long run. Maximum 13m of run. So do you think the fan is not necessary to be installed?
What about the selection of duct material etc?

Originally Posted by craig1

Are you talking about the combustion exhaust (smoke) or heat exhaust (from the radiator)

The combustion exhaust should not have any fans. It should be a sealed, insulated piping system the goes straight to the outdoors.

+1 anytime I've seen this done its vented outdoors directly. Unless its a really long run, you should be able to size a flexible ss pipe designed for this application.

This can basically be treated the same add a oil boiler....except ours a positive displacement pump so you need a heavier duct/pipe. A diesel vs. tolerate some backpressure. Its common to use those small flappers on to of the stacks to keep rain out.

Sent from my DROID RAZR using Tapatalk 2

I wish mr.craig come up with a solution for my query !!

I was desiring that i can do this on my own with the help of folks on this page.
And if sent to mnfrer it wil take longer time to get a feedback.
This was not present during tender stage of project. The project is almost finished and during handing over the client requested for this. So, u may understand the rest..!