Graham,
I suppose you are aware of Council House 2 in Melbourne? See
http://www.gbcaus.org/docs/GBCA_Ch2_factsheet%201.pdf for basic information.
A web search throws up a number of results as well, but not a lot of
specific information.
Lincolne Scott (recently acquired by WSP Group) were the engineers on the
project. They have offices in Sydney and we (Rocky Mountain Institute) work
closely with their US offices, so if you need, I could put you in touch with
someone in their US office, so as to put you through directly with the
relevant folks in Sydney/Melbourne for specifics.
Dear Graham,
I work at an engineering firma in Barcelona, and we are currently designig a small office buidling (2000 m2 aprox) with activated cooling slabs in Tarragona (Latitude 41). The radiant (only cooling) system is the BKT-Rautherm product by Rehau. The BKT will be presumably installed this coming March.
Moreover, the Rehau offices in Barcelona have the BKT system installed for heating and cooling and its been running for some years.
If you are interested in having more details on the Tarragona building, let me know. Also, if you want more information on the Rehau Headquarters in Barcelona, I can forward your request to our Rehau contact.
Sinecrely,
I am using IES to conduct a CFD model on a long and narrow room (283ft
by 60ft) with three large ducts (square 4ft by 4ft) running along the
ceiling (280ft long, 28ft off the floor). I have 18 diffusers equally
spaced along each of the three 280ft ducts for a total of 54. Each
diffuser has a CFM of 1110, an area of 3.75 sf, and a discharge velocity
of 300 fpm. There is a single return grill at one end of the building.
My problem is: when I look at the velocity vectors in the MicroFlo
Viewer some of the diffusers have the air flowing backwards or into the
diffuser, not flowing out as it is supposed to. This occurs across all
three duct lengths at the same diffuser location.
Has anyone else run into this and have they resolved the issue? IES
took my model and made changes to it only to find that they could not
fix it.
The flow volume vs output pressure of the flow source is critical in
these cases. Are you modeling 1) Open bladed fans, 2) Tube axial fans,
3) Centrifugal blowers ??
Have you tried using CBs in the reverse flow locations ???
The nearest application to your problem is the flow in turkey sheds.
In the Mid Atlantic region they are typically 50 ft wide, 650 or 900 ft
long and 7 ft to 9ft high
inside with blowers distributed along the side walls.
In the Midwest they are 80 ft wide, and proportionately shorter.
These variations have been well examined by the poultry industry and
Virginia Tech University.
There is also the "Mid West Plan Service" which is run out of either the
U of Minnesota or U Wisconsin.
It gives detailed information on large Agricultural buildings......
By the way if your room is 283 ft long and the ducts are 280 ft long,
you already have a significant
problem......
Graham,
I suppose you are aware of Council House 2 in Melbourne? See
http://www.gbcaus.org/docs/GBCA_Ch2_factsheet%201.pdf for basic information.
A web search throws up a number of results as well, but not a lot of
specific information.
Lincolne Scott (recently acquired by WSP Group) were the engineers on the
project. They have offices in Sydney and we (Rocky Mountain Institute) work
closely with their US offices, so if you need, I could put you in touch with
someone in their US office, so as to put you through directly with the
relevant folks in Sydney/Melbourne for specifics.
Regards,
-Aalok Deshmukh.
Dear Graham,
I work at an engineering firma in Barcelona, and we are currently designig a small office buidling (2000 m2 aprox) with activated cooling slabs in Tarragona (Latitude 41). The radiant (only cooling) system is the BKT-Rautherm product by Rehau. The BKT will be presumably installed this coming March.
Moreover, the Rehau offices in Barcelona have the BKT system installed for heating and cooling and its been running for some years.
If you are interested in having more details on the Tarragona building, let me know. Also, if you want more information on the Rehau Headquarters in Barcelona, I can forward your request to our Rehau contact.
Sinecrely,
Jordina Vidal.
Hello,
I am using IES to conduct a CFD model on a long and narrow room (283ft
by 60ft) with three large ducts (square 4ft by 4ft) running along the
ceiling (280ft long, 28ft off the floor). I have 18 diffusers equally
spaced along each of the three 280ft ducts for a total of 54. Each
diffuser has a CFM of 1110, an area of 3.75 sf, and a discharge velocity
of 300 fpm. There is a single return grill at one end of the building.
My problem is: when I look at the velocity vectors in the MicroFlo
Viewer some of the diffusers have the air flowing backwards or into the
diffuser, not flowing out as it is supposed to. This occurs across all
three duct lengths at the same diffuser location.
Has anyone else run into this and have they resolved the issue? IES
took my model and made changes to it only to find that they could not
fix it.
Thank you in advance for any advice,
Joshua Brain
Hi;
The flow volume vs output pressure of the flow source is critical in
these cases.
Are you modeling 1) Open bladed fans, 2) Tub
Hi;
The flow volume vs output pressure of the flow source is critical in
these cases. Are you modeling 1) Open bladed fans, 2) Tube axial fans,
3) Centrifugal blowers ??
Have you tried using CBs in the reverse flow locations ???
The nearest application to your problem is the flow in turkey sheds.
In the Mid Atlantic region they are typically 50 ft wide, 650 or 900 ft
long and 7 ft to 9ft high
inside with blowers distributed along the side walls.
In the Midwest they are 80 ft wide, and proportionately shorter.
These variations have been well examined by the poultry industry and
Virginia Tech University.
There is also the "Mid West Plan Service" which is run out of either the
U of Minnesota or U Wisconsin.
It gives detailed information on large Agricultural buildings......
By the way if your room is 283 ft long and the ducts are 280 ft long,
you already have a significant
problem......