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: *

  1. HawksHockey

    CO2 pH neutralization

    That could very well be the final solution due to the cost of operating a CO2 system, or the initial capital cost of the equipment for the CO2 system. There are no available options that we are discounting, we are just starting with a CO2 system.
  2. HawksHockey

    CO2 pH neutralization

    I am presently researching the availability of CO2 pH adjustment systems to replace an old acid (HCl) dosing system. The pH of the inflow is approximately 13-14, and the pH has to be reduced to 6-8. The waste water is presently produced through a batch process, and the inflow is manually...
  3. HawksHockey

    Slip On Flanges in Steam Service

    Someone may have mentioned this previously, but... Weld Neck Flanges give the client the opportunity to perform a radiographic examination on the welded joint, whereas the slip on flange welds can only be tested using a surface indication test like magnetic particle. There is no real method...
  4. HawksHockey

    Pump head calculation

    gepman has the goods. Cameron Hydraulic Data or Crane's Tech paper No. 410 are generally the two documents that explain TDH requirements. I've also used the Durco Manual as well. All three are good.
  5. HawksHockey

    Air changes per hour for room

    I think after all this time, that I've finally gotten the basics under wraps. My problem was exactly what you stated, I was mixing ACH (air changes per hour) with total volumetric flow rate. If my total volumetric flow rate was equal to my ACH (100% outdoor air) my Latent load would have been...
  6. HawksHockey

    Air changes per hour for room

    That is the question I've come to as well. ASHRAE recommends certain air changes per hour, but is this fresh treated air (ACH) or is this total volumetric flow rate to (through) the room (ACH). I have a hard time beleiving that 250,000 BTHU/HR of load can be dissipated with 8 or 10 air changes...
  7. HawksHockey

    Air changes per hour for room

    Thanks for the help everyone, all the information was extremely helpful and has me going in the proper direction...Thanks
  8. HawksHockey

    Air changes per hour for room

    Once again thanks for the help. The acceptable room temperature is 80F. Your two points are valids:) Electrical load and 2) outside air load. I have calculated all heat loads (ie. Latent and Sensible). The total cooling load is in the neighbourhood of 250,000 BTU/hr. ACH of 6-10 was chosen...
  9. HawksHockey

    Air changes per hour for room

    Yes, if I understand correctly - I will be utilizing some sort of cooling. At this point I was looking at a water/air cooling coil as I have access to chilled water. So if I use 100% outside air (which is conditioned air to 90 F) I should be able to cool the room incoming air to a respectable...
  10. HawksHockey

    Air changes per hour for room

    The more I look into this, the more confused I get. I was basing my calcs on an old version of the e-room and subs equipment list. I do not think that they are accurate. Therefore my loads may be out to lunch. I have a lot of work to do. Thanks for the help. It's appreciated.
  11. HawksHockey

    Air changes per hour for room

    Sorry, maybe I should have called it a sub station. I've got the equipment list, it includes transformers (750 KVA, and 2 MVA transformer @ one each) which are the largest contributor to the loads at 25 W/KVA and 20 W/KVA respectively. So the load from the 2 MVA transformer looks to be 40,000...
  12. HawksHockey

    Air changes per hour for room

    The electrical room is actually underground (mine) and we are drawing air from the drifts being supplied by the main shaft ventilation. However, you are right, there is very little latent load - primarily due to the room air changes, the vast majority of the load is sensible from the equipment...
  13. HawksHockey

    Air changes per hour for room

    Ok, I've struggled with this one. I'm new at this, so here goes: I'm trying to determine a volumetric flow rate of air for a room which houses electrical equipment. I have the dimensions of the room at 15 x 27 x 20 and I have determined the cooling load at 250,000 BTU/hr. The room is...
  14. HawksHockey

    Compressor installation at high altitude

    Thanks, so far so good. We've been talkling about it in our office so the Electrical portion is also in motion. I'll have to check the services availability at the location (water, power, ...)
  15. HawksHockey

    Compressor installation at high altitude

    Hi, this may have been asked previously, but... I have a compressor rated for 1500 SCFM (14.7 psia, 60 F), that will be installed at 3,369 ft above sea level (12.93 psia). The discharge pressure of the compressor is 105 psig, so at standard conditions my volumetric flow rate would be about 195...
  16. HawksHockey

    need to know if inspection is mandatory by any code if PSV has opened

    I'm not sure what section of the Boiler and Pressure Vessel Code you fall under (Section I or VIII). But on Section I valves installed on Boilers proper, you may find that they pop periodically - but reseat properly (I guess the same can be said about Section VIII valves). At our mill, we had...

Part and Inventory Search

Back
Top