I always use Ashrae duct fitting database tables for the pressure drop calculations of duct fittings.
I just happened to do the same calculations for a different duct material this time.
Traditionally we always use duct material Galvanized Steel, for the pressure calculations, for duct as well...
I need clear differentiation between the functions of Fire Damper, Smoke Damper and Fire and Smoke dampers.
What factors decide the use of each of these three Dampers.
Thanks in advance.
Hi all
I have an underfloor distribution system to be designed to serve an auditorium, in the seating area, i am already using underfloor system for which i have raised floor, and return from top. While for the stage area, i have both options available i.e., i can either do underfloor or can do...
I have an indoor shooting range of 300 meters length, 35.6 meters wide and 5.0 meters high to be conditioned. I have seen many guides which say that the flow inside the range has to be laminar. Moreover they say that in order to achive the laminar flow, the air velocity should not exceed...
Has any one done a comparison of Cooling load calculations between transfer function and RTS method.
I am trying to make this comparison these days for an identical building doing twice by each method.
if anyone has done this before, please share the experience. which one is more accurate or...
I am using the pretreated fresh air handling unit to dehumidify outside air for cooling.
I've designed the cooling coil with heat pipe wrap around.
My design figures for coil and heat pipe selection are as follows.
Air enters the heat pipe pre-cool section at 115/80 (DB/WB)deg F. After...
I am designing the ventilation system of parking garage in two basements. The allowable NC level is 45. Ashrae HB for applications says that with 45 level of NC, the maximum velocity of the duct is 2000 FPM. I have to have the duct mounted fans in the high level of these basements. NC level...
i just visited HVAC Solution website, where i learned that HVAC Solution's newer version is able to import gbXML file into it. I have used its older version where gbXML import was not there. Has anybody used this new version and imported gbXML? I am intersested to know because this is an...
has anybody used the chiller data files (*.cd2 or *.cd4) or imported from somewhere to use in HAP
its an electronic data file for chiller performance
if anybody knows, please let me know if i can have or download these files.
need to know the source, from where can i download these data...
What is the basic objective in Pre-Treating the Fresh air. My question is for Cooling Case only for Hot and Humid Climates.
1. Is it removal of grains of moisture in outside air down to grains of room air.
2. or is it lowering the enthalpy of outside air down to room air??
if it is to lower...
Has anybody come up with an idea of modulating fresh air via a central Fresh air unit serving several AHU's using occupancy sensors located in different zones
