Rules of thumb comes with experience. If you are still beginning with your career, I would suggest to first understand the HVAC fundamentals, and learn manual calculations before dealing with softwares.
What is your desired indoor condition?
What is your sensible heat ratio?
Are you using steam?
Do you have a psychrometric chart?
Do you have a steam table?
From NFPA 415 (2016)
4.5.5 Water Supply. Water supply from public or private sources
shall be adequate to supply maximum calculated sprinkler
demand plus a minimum of 500 gpm (1893 L/min) for hose
streams. The supply shall be available at the rate specified for a
period of at least 1 hour.
EloyRD,
150 m2? That is a small room and ventilating it will result to over 40 air changes per hour, imagine that draft inside the room.
Probably you have to double check on the chiller motors heat (open type or hermetic type), which maybe not that much as I assumed to be the same as pump...
Hi,
Why mechanical efficiency is used to estimate the heat generated by motors?
Based on your data, assuming all pumps and chillers are running at the same time and motor heat dissipation is 5% of motor rating (95% efficiency), I get 72 kW of heat, that is approximately 6 m3/s (12,713 cfm) of...
What is your delta T?
For pipes 50mm and below, consider max velocity 1.2 m/s and max friction loss of 600 Pa/m.
For pipes larger than 50mm, consider max velocity 2.4 m/s and max friction loss of 400 Pa/m.
If it's in then you should be good.
RMERMP where you from?
First, with just ventilation you cannot mainatain 24C inside if your outdoor temp is 28C, even 28C indoor will be unrealistic. Should be air conditioned to do that.
Your delta T will be based on how much temp rise your electrical room will maintain at the peak of summer...
