That is interesting dbill. I had not realized that some jurisdictions had that restriction. So do you just daylight your condensate, or do you put in floor drains and pipe to storm?
I will say this about PCM. They must make some money, somehow... they have an ad in every edition of the ASHRAE Journal... I haven't used it, but I guess someone must be.
Alright, here is a fun one. Had a client say they need some help redesigning their storm water system. They had recently been flagged by the city for putting too much storm water in their sanitary sewer system. In my head I snickered, because I feel like the term "too much" and "any at all" are...
Your pressure should fluctuate quite a bit. Since your distributor is working for a temp it will be changing the pressure based on the temperatures. I don't think you will find a good number...
You don't have to hire a local engineer. There are lots of engineers that work in multiple states. Find a bigger firm, google MEP engineers or MEP consultants. As said before these should be stamped drawing submitted to an AHJ for review. Otherwise you are breaking the law [sadeyes]
You should put in a transfer from an adjacent space with a fire/smoke damper in the opening. That way you don't pull in unconditioned air into your room.
You want to do as Pedarrin suggested. You want your gpm's, decide how many fixtures could run at once, and your inlet water temperature. There is no better way to do it really. Newer, more expensive models are better at flow diversity than older models, but you can easily ruin/shorten the life...
ZDR, I agree with what you said, but I will say many people refer to ACH in a general term as air being supplied to a space. So I have had people tell me they need 1 ACH of fresh air and 6 ACH in the building. What they actually asking for is a unit that will supply air equivalent to 6 ACH with...
You don't have to follow energy code if the building is a process, and given the site, the AHJ is the owner so they get to allow whatever they want.
We wanted to separate them out, but there is not space on the site to grow the building, or add new buildings. It is very tight.
Building needs to be at 77 because there are large battery racks in the space. 77 is the preferred temp by battery manufacturers. Above that they de-rate them.
You are correct. There is no humidity source in the building. The concern during the winter was if it is 60 degrees outside, and then goes to 30 degrees in a couple hours, would my interior dew point keep up with outside air dew point.
The battery life will still be shortened significantly due to the 100+ F temps. How would you do an evap system if you don't have access to water? One of my friends always said "A BTU is a BTU is a BTU", meaning it doesn't matter how you get from A to B, you still are going to need "x" amount of...
Well... you have switched questions from the OP. Are you asking about heated air or cooled air. Like dbill said the evaporator makes the cool air. The "heated air into the cabin" comes from a heater core and not part of a DX cycle at all. I would if I were you stop telling people you have a good...
I don't know... both of my engineering internships were paid, and at my company we have several interns every year and they are paid. I think it depends on the field and location.
I agree with littleinch, there will be an approach temp that you reach, I usually find about 7 degrees difference to be where your CFM will get out of control in comparison the volume of the building. Without any active cooling (evap, DX, chilled water) you won't ever get to 80 degrees with an...
Yes you are missing something. The load in the switchgear building is over 10x the heating requirement for the building, and the building is almost IN the sea. So the building will be in cooling mode during the winter, and the humidity will still be high. My concern was that the outside air will...
