4wd Dyno Cell Project - Build Log, Discussion & Pictures. (DYNO IS IN !!)
26-10-2012, 10:13 AM
#42
This may have already been discussed, but have you calculated exhaust air (as in air out of the dyno) flow compared to inlet air (as in air pumped into the dyno)? I had one instance recently where a dyno cell was being pressurised that much by the fact that the exhaust couldn't get the air out quick enough, which was actually backing up the inlet fans, pressurising the cell and actually stopping the inlet fans from doing anything.
Easy fix was to open a rear door in the dyno cell. lol
Easy fix was to open a rear door in the dyno cell. lol
The dyno CELL however, has to do a lot more. It needs to:
- Provide an easy access environment for the dyno.
- House the dyno cooling system.
- Provide a cooling airflow to ensure the heat is removed from the engine and drivetrain.
- Provide enough additional airflow to turn over the air in the cell at least 300 times an hour but preferably 600.
- Provide extraction of exhaust gas seperately... ideally 100% extraction leaving no exhaust gas in the cell.
- Maintain a constant cell ambient pressure identical to that outside the building, neither negative nor positive is acceptable.
- Provide any necessary soundproofing if required. (Our biggest headache)
- Provide a safe customer viewing area.
- House any cameras etc used to record the runs.
- House any connectivity that the operator may need to perform the job. (PC access - monitors - Tools - etc)
Last edited by Stu @ M Developments; 26-10-2012 at 10:14 AM.
26-10-2012, 10:57 AM
#43
The Electrickery Nightmare...
There is little more boring to me than wiring, but we had lots of it to do. My intention is to have this cell as autonomous as possible, with as much functionality wireless as can be obtained reliably, and that means a lot of computer interface sockets need to go in the cell walls and a lot of HD cameras need wiring in too, along with the obvious three phase for the dyno itself, the exhaust fans and the engine cooling fans. The network also needs to be linked to my other unit, that's another headache to be overcome, but I cannot abide wiring trailing everywhere, so this is a very important part of the build for me, I want operation as wire free as possible.
The fan room needs its own 3 phase distribution board so we can spur out from there and leave nothing too visible in the cell and there is now a dedicated computer, network and camera control area that is outside the cell itself, so the wiring begins and everything is terminating in that one area...
Not a lot to say, its all just wire.
The network alone has used over 400 meters.
This should carry the juice we need.
This will power the engine cooling fan.
Power socket for the exhaust extraction fan.
Power socket for the exhaust extraction fan.
The obligatory "Oh Shit" button.
Exhaust fan wired and finally running...
Lots of computer integration options going in a custom socket we are having made. 2x serial 2x Cat 5, 4x USB. This has been thought about carefully and will all interface in 2 parts in the fan control room, so if we ever have a problem in the cell we can change just that half and be back up and running, I have also wired 100% redundancy so should hopefully never have to take the wall apart to change a wire.
2x USB and 1x HDMI going near the drivers door.
4 channel remote for control of the three phase fans.
Next -
the soundproofing walls are going to come together.
There is little more boring to me than wiring, but we had lots of it to do. My intention is to have this cell as autonomous as possible, with as much functionality wireless as can be obtained reliably, and that means a lot of computer interface sockets need to go in the cell walls and a lot of HD cameras need wiring in too, along with the obvious three phase for the dyno itself, the exhaust fans and the engine cooling fans. The network also needs to be linked to my other unit, that's another headache to be overcome, but I cannot abide wiring trailing everywhere, so this is a very important part of the build for me, I want operation as wire free as possible.
The fan room needs its own 3 phase distribution board so we can spur out from there and leave nothing too visible in the cell and there is now a dedicated computer, network and camera control area that is outside the cell itself, so the wiring begins and everything is terminating in that one area...
Not a lot to say, its all just wire.
The network alone has used over 400 meters.
This should carry the juice we need.
This will power the engine cooling fan.
Power socket for the exhaust extraction fan.
Power socket for the exhaust extraction fan.
The obligatory "Oh Shit" button.
Exhaust fan wired and finally running...
Lots of computer integration options going in a custom socket we are having made. 2x serial 2x Cat 5, 4x USB. This has been thought about carefully and will all interface in 2 parts in the fan control room, so if we ever have a problem in the cell we can change just that half and be back up and running, I have also wired 100% redundancy so should hopefully never have to take the wall apart to change a wire.
2x USB and 1x HDMI going near the drivers door.
4 channel remote for control of the three phase fans.
Next -
the soundproofing walls are going to come together.
Last edited by Stu @ M Developments; 26-10-2012 at 11:00 AM.
26-10-2012, 11:06 AM
#44
ps, would Kingspan help with noise reduction?
Last edited by Stu @ M Developments; 26-10-2012 at 11:08 AM.
26-10-2012, 11:41 AM
#45
I've found that life I needed.. It's HERE!!
Just curious and maybe not required but are you having any kind of fire suppression system fitted or are hand held extinguishers all that is needed if something catches? Say an engine or electrical fire. Could spread pretty quick with the wood and sound proofing in the unit.
Ace build thread by the way, is really really interesting to see just what goes into and and how professional it's all looking.
Keep up the good work!
Ace build thread by the way, is really really interesting to see just what goes into and and how professional it's all looking.
Keep up the good work!
26-10-2012, 02:28 PM
#47
The rooms are coming together now...
The reception had to be built to allow us to finalise the cell wall, so we got on with turning this mess into a reception area.
It soon came together and we were able to install an incredibly expensive sheet of triple layer acoustic grade glass.
Which from the inside, now looks like this.
The stairs were plastered and went from this...
To this...
The training and mail order rooms start to take some shape...
And work begins on the part we have all been avoiding. Soundproofing the ceiling...
Which was a worse job for some more than others. (Thanks Nicci.
)
And meanwhile, the fan room keeps moving forwards...
As does the dyno cell itself...
The reception had to be built to allow us to finalise the cell wall, so we got on with turning this mess into a reception area.
It soon came together and we were able to install an incredibly expensive sheet of triple layer acoustic grade glass.
Which from the inside, now looks like this.
The stairs were plastered and went from this...
To this...
The training and mail order rooms start to take some shape...
And work begins on the part we have all been avoiding. Soundproofing the ceiling...
Which was a worse job for some more than others. (Thanks Nicci.
)And meanwhile, the fan room keeps moving forwards...
As does the dyno cell itself...
26-10-2012, 03:48 PM
#51
OCD Victim
26-10-2012, 11:49 PM
#60
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stu, one thing to look out for with your exhaust extractor is where it exits onto the roof, that exhaust gas doesn't leak into neighbouring units at roof level. a friend of mine has a bike dyno with a similar system in a similar location and when hot exhaust gas exits the stack it hits cold air and 'hangs' onto the roof and leaks into neighbouring units. if you stand in their unit upstairs when dyno is gettting used you start to smell it after a short while.
27-10-2012, 09:27 AM
#64
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Stu
Do any of the acoustic products you have used on the walls do anything to reduce the volume or dampen the sound inside the cell itself?
Just wondering if they are all hard surfaces in there? if so will they create sound reflection and in places amplification of certain fq?
Crude example but you know how the old egg box's on the bedroom wall solution used to work. Have you considered any products to create a similar effect or is that total overkill?
edited to add http://www.alphaacoustics.com/products.asp some very simple but effective products on this site (possibly quite expensive though)
Do any of the acoustic products you have used on the walls do anything to reduce the volume or dampen the sound inside the cell itself?
Just wondering if they are all hard surfaces in there? if so will they create sound reflection and in places amplification of certain fq?
Crude example but you know how the old egg box's on the bedroom wall solution used to work. Have you considered any products to create a similar effect or is that total overkill?
edited to add http://www.alphaacoustics.com/products.asp some very simple but effective products on this site (possibly quite expensive though)
Last edited by brad; 27-10-2012 at 09:51 AM.
28-10-2012, 07:03 AM
#66
Correct. 
Its something we have considered and have asked the units in question to keep us informed. Thanksfully we all get on well on this estate, and I am trying hard to keep it that way. 
The door is having a special dense rubber applied to it, but its going to be very limited due to the fact the doorway is also going to house the cell extraction, as you will hopefully see later... MUCH bloody later at this rate as thats the one aspect I am struggling to have built for me. 
No, above floor, below floor is a real arse to tie the cars down and doesnt cool as well.
Eat me ugly... weve all done about 80hrs this week.
The products we have used to indeed have an absorbion property and we are going to essentially "suck it and see" with regards internel cell SPL. Have considered various options from accoustic foam to expensive absorbtion materials and they all seem to have the same properties in as much as they are designed more to reduce reverberation and enhancement of certain frequencies with regards to improving sound "quality" as opposed to reducing sound "level".
stu, one thing to look out for with your exhaust extractor is where it exits onto the roof, that exhaust gas doesn't leak into neighbouring units at roof level. a friend of mine has a bike dyno with a similar system in a similar location and when hot exhaust gas exits the stack it hits cold air and 'hangs' onto the roof and leaks into neighbouring units. if you stand in their unit upstairs when dyno is gettting used you start to smell it after a short while.
No, above floor, below floor is a real arse to tie the cars down and doesnt cool as well.
Eat me ugly... weve all done about 80hrs this week.
The products we have used to indeed have an absorbion property and we are going to essentially "suck it and see" with regards internel cell SPL. Have considered various options from accoustic foam to expensive absorbtion materials and they all seem to have the same properties in as much as they are designed more to reduce reverberation and enhancement of certain frequencies with regards to improving sound "quality" as opposed to reducing sound "level".
28-10-2012, 08:21 AM
#69
Too many posts.. I need a life!!
Correct.
Its something we have considered and have asked the units in question to keep us informed. Thanksfully we all get on well on this estate, and I am trying hard to keep it that way.
The door is having a special dense rubber applied to it, but its going to be very limited due to the fact the doorway is also going to house the cell extraction, as you will hopefully see later... MUCH bloody later at this rate as thats the one aspect I am struggling to have built for me.
No, above floor, below floor is a real arse to tie the cars down and doesnt cool as well.
Eat me ugly... weve all done about 80hrs this week.
The products we have used to indeed have an absorbion property and we are going to essentially "suck it and see" with regards internel cell SPL. Have considered various options from accoustic foam to expensive absorbtion materials and they all seem to have the same properties in as much as they are designed more to reduce reverberation and enhancement of certain frequencies with regards to improving sound "quality" as opposed to reducing sound "level".
Its something we have considered and have asked the units in question to keep us informed. Thanksfully we all get on well on this estate, and I am trying hard to keep it that way.
The door is having a special dense rubber applied to it, but its going to be very limited due to the fact the doorway is also going to house the cell extraction, as you will hopefully see later... MUCH bloody later at this rate as thats the one aspect I am struggling to have built for me.
No, above floor, below floor is a real arse to tie the cars down and doesnt cool as well.
Eat me ugly... weve all done about 80hrs this week.
The products we have used to indeed have an absorbion property and we are going to essentially "suck it and see" with regards internel cell SPL. Have considered various options from accoustic foam to expensive absorbtion materials and they all seem to have the same properties in as much as they are designed more to reduce reverberation and enhancement of certain frequencies with regards to improving sound "quality" as opposed to reducing sound "level".
Worked in a few sound studios myself,they used a felt system that went directly over the rockwool.
Its a plastic strip that fixes to the wood frame,then the felt/nylon material is pushed into a slot at all the joins,that makes a very neat seam at all the joints.
28-10-2012, 08:45 AM
#72
After all, it is pretty much odourless so the people within may not detect anything, but it could be causing problems.
It's one thing upsetting neighbours, it's another someone trying to sue.
At least a CO detector ( that could even be hardwired to a control unit within your premesis ) would give some hard recorded facts.
You'll probably have a decent fire detection system in the building anyway, so adding a CO detector or 2 to that shouldnt pose any major issues.
Perhaps overkill....but we all know the world we live in these days with claims.
28-10-2012, 07:25 PM
#74
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Impressive use of space,the unit looked very small initially but now pretty tardis like.
A few things that perhaps I would have set out differently as regards wiring and ducting etc but a great job nonetheless.
Looking forward to seeing it finished.
A few things that perhaps I would have set out differently as regards wiring and ducting etc but a great job nonetheless.
Looking forward to seeing it finished.
28-10-2012, 07:40 PM
#75
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blimey!! only seen a few pics when you put them on facebook. really interesting read 
i have a nice picture to send to you that woiuld go perfectly on a wall somewhere
not the toilet wall though
i have a nice picture to send to you that woiuld go perfectly on a wall somewhere
not the toilet wall though
