Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: m2e
  • Content: Threads
  • Order by date
  1. m2e

    Sewage Lift Station Blower Heater - Class 1 Div 1

    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...
  2. m2e

    Aluminum damper in galvanized duct - dissimilar metal corrosion?

    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?
  3. m2e

    Outdoor make-up air duct insulation

    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...
  4. m2e

    Evaporation rate and ventilation calculation

    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...
  5. m2e

    NFPA 820 Wet Well Ventilation - Dry Volume or Air Space Above Liquid?

    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...
  6. m2e

    Snow melt thru a panel

    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...
  7. m2e

    Venmar CES Custom AHU Quality Issues?

    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.
  8. m2e

    Diesel Generator Set Room Air Recirculation

    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...
  9. m2e

    Propeller exhaust fan behind louver?

    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?
  10. m2e

    Code consultant in Canada?

    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...
  11. m2e

    Walk-in cooler / refrigerator ventilation?

    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.
  12. m2e

    Evacuation of gas in a storage tank

    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...
  13. m2e

    Industrial make-up air lowest temperature?

    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...
  14. m2e

    CFD for Industrial /Process Plant HVAC

    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...
  15. m2e

    CFD for Industrial /Process Plant HVAC

    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...
  16. m2e

    Pressure drop calculation for exhaust header / parallel fan?

    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...
  17. m2e

    Best Ductwork Material for Moisture Removal Process

    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...
  18. m2e

    Wave speed for urethane-lined steel pipe

    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.
  19. m2e

    Separation distance between potable water tank and sewage holding tank

    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...
  20. m2e

    HRV fresh air supply ok?

    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.

Part and Inventory Search

Back
Top