Hi,
I was wondering if someone could help me a bit regarding sizing of the main heating coil inside AHU in VAV system, single duct, multiple zones...etc. So, I am aware of principle how VAVs with re-heating coils are operating (first, airflow is reduced until setpoint in the room is reached...
Hi all,
when calculating temperature drop in the HVAC ducts, what type of flow do you consider that is outside duct?
1. Natural Convection
2. Forced Convection
Let's say it is normal building in question, and all ducts are inside the false ceiling, or in the room (if there is no false...
I just wondered which software people use for this kind of a job. I had chance to try microprotol, and it is pretty nice software especially for heat exchangers, but during my work in it I found a lot of bugs, and wanted to see if there is something similar. I also use pvelite and codecalc.
Hi,
can you tell me which software are you using for mechanical calculations? I'm interested in good software for mechanical calculation of heat exchangers.
Thank you in advance.
Hi,
Can someone recommend me a good website on how to calculate Center of Gravity in 3D, or some literature?
I have to calculate the COG of complete vessel with skid which is beside vessel.
Thanks in advance
Can someone explain to me what is steam out, and what does that mean in real life, when it is happening, what is actually happening when this occurs...
Thank you
Is there any option in Acad 2007 to set priority of osnaps? I keep all my osnaps turned on, and when I have a lot of line intersected, for instance, and want to start a line from that intersection point, I come near to that point and my midpoint osnap is activated instead of intersection...Like...
IFRs,
You did help me..You showed me that option DimRoundOff..I didn't know to check that option until now.
Since I don't need all dimensions with this, I can set this value to 2 only for those dimensions that I need to be rounded down.
Thank you.
No.. It won't help. I tried to set DimRoundOff to 2..and Then I get 450 from 450.955465...But, it is not ok, because, when I set this value to 2 and set precision to 0.0000000, dimension shows me 450...
I don't want dimension to show me 450 if precision isn't 0. So, I want to have dimension...
Hi, does anybody know is it possible to make acad to round dimensions to lower number. For instance, I draw a line,and dimension shows 45.8796548.. Is it possible somehow to set precision 0, and to get number 45 instead of 46 as I get now????
Thanks in advance
Yes, I saw that..but, someone is trying to convince me that Cp for water vapor at 210deg and 21 bar is 1.97kj/kgK (and that is the value for 210deg and 1 bar)...So I just wanted to see if I'm right
Speco,
thank you very much...And can you tell me, for water vapor, I need cp, thermal conductivity etc...On the net, I have only found values for 1 bar, and I have 21 bar at 210deg celsius?
Is it possible to find somewhere these values, or these values are available only for 1 bar?
Hi, can someone direct me to a book, or website, whcih can show me how to calculate thermal conductivity and dynamic viscosity of mixture of gases?
My mixture consists of: Hydrogen, Nitrogen, Carbon monoxyde, Carbon Dyoxide, Methane and water vapor...
I need formula to calculate thermal...
Ok...Thank you...
Can you help me a bit more please?
First, is it possible to have hexagonal ballons on drawing (and how)?
If it is, is it possible to have combination of ballon shapes on one drawing?
I need this, because some of ballons are circular, and some are hexagonal.
Thanks
Hi. Can someone help me on how to enter centerlines of cylinders in a drawing?
I have a couple of cylinders in assembly, and when creating a drawing I don't have their centerlines in it.
Can someone tell me how to do that?
Thanx in advance.
