A sewage lift station is being designed for a residential area, so an odour control unit is required to maintain the below-grade chamber in a negative pressure. A blower-heater unit sits on top the wet well to provide tempered make-up air so the liquid won't freeze. The unit we're using is this...
If you put an aluminum control damper (such as Tamco or similar) in a section of galvanized steel duct, would galvanic corrosion be a concern? Similarly, if you have an aluminum intake or exhaust louver connected to galvanized ductwork, would that be a concern too?
I have a conceptual question to aid my understanding of thermal insulation and duct condensations.
Suppose there is an equipment room that needs a small amount of make-up air for pressurization. There is a supply fan that takes air from an intake louver, through a supply duct, and delivers it...
For a chemical storage room, let's say you have a tank of chemical for a certain process, for example chlorine or fluoride for water treatment processes. How do you calculate the evaporation rate of such chemical, and how much ventilation is required to remove the vapor in order to meet OSHA or...
There is a fairly large wet well that I will need to ventilate per NFPA 820, 12 ACH to classify it as class 1 div 2. We also need to provide odour control to the exhaust air, so that resulted in a huge odour control unit.
NFPA 820 stated 12 ACH is required, but can we get away with only...
This is for an industrial application. How do you calculate the amount of heat required *inside* an enclosure, so that the exterior wall would not accumulate snow or ice? I supposed the goal is to maintain the external wall surface temperature to be above freezing point.
Some of the variables...
We have specified an Eng-Air or Haakon custom AHU for an industrial project, but the contractor submitted a Venmar EnergyPack as an alternate. I'm unfamiliar with this manufacturer. Is it a recognized manufacturer and is it an equal to Eng-Air or Haakon? Any quality issues or concerns?
Thanks.
For utility buildings, diesel gen-sets are used as a backup or even primary power source. The gen-set is in a separate room, but in the same building as the main utility room (electrical panels, pump, MCC, etc). The gen-set is not for fire safety, or life safety systems, just to provide power...
For most of the catalogs I've seen, weather hood is always used downstream of the propeller type exhaust fan on the building exterior. To save space on the outside, is it advisable to have an louver instead? Or does it create too much pressure drop for the fan?
My industrial client is purchasing a material handling system from Germany and to use it in Canada. A consultant firm is hired to design for the installation for the entire system into their plant, but they need somebody to review the fire suppression system to see if it comply with local code...
In a food and beverage plant, they have a big room (300' x 300' x 50') to store the finished products. It's a refrigerated room but there is no ventilation.
What's the requirement for ventilation for this type of room? I can't find it in ASHRAE 62.1.
Thanks.
I'm working on a project where some tanks needs to be vented, and need some advice. Not sure this is the best forum to post, or the HVAC/R forum. Please advice if it's incorrect.
The tank is at atmospheric pressure, and we need to fill air into the tank through a 2" inlet pipe and release air...
I'm doing a high level review for an industrial HVAC system where the indoor temperature is too high in both summer and winter. There is a lot of heat and moisture produced by the process in the plant and the ventilation is not enough. I understand that air change is not a good criteria for...
Hi, I've searched around the forum and although there are similar questions asked, none is specific enough so I'd like to ask again to see what the experts have to say about this.
I'm working on an industrial HVAC retrofit project where the building is 100m long x 30m wide x 35m high. Obviously...
Hi, I've searched around the forum and although there are similar questions asked, none is specific enough so I'd like to ask again to see what the experts have to say about this.
I'm working on an industrial HVAC retrofit project where the building is 100m long x 30m wide x 35m high...
What is the pressure drop calculation method for an exhaust ductwork system where multiple exhaust fans discharge into a common header, and the combined E/A duct run out the building? Can you assume the friction is the same as a single fan system? Also, how do you size the fan with the back...
In a process building, a machine involves with hot water generates a lot of moisture/steam, and needs an exhaust system to bring the air outdoor. Because of building restriction, the exhaust duct will exit building horizontally through the wall, and run the exhaust stack along the side of the...
Is there any way to calculate the wave speed for a urethane-lined steel pipe? I am doing a transient analysis for a slurry flow, but can't seem to find a formula to find the correct wave speed.
Any help would be appreciated.
Thanks.
Doing some preliminary research for a project that involves a building in a remote site. It requires an underground potable water tank and an underground sewage holding tank. We intent to put them into the same hole in the ground exterior to the building and dig the hole deep enough for the...
Hi,
For a radiant floor heated industrial building in an extreme cold climate, what's the best way to supply fresh air into the room?
Is a HRV unit supplying fresh air (20cfm/p) into the room good enough? Or do we need reheat?
Thanks.
