I am really getting some fruitful conversations in this and other threads and I am really thankful to all of you for your generous support.
Yes 650-700 GPM is the peak flow occurring for a small time during a day. I wonder why UPC or IPC do not define it clearly in their code and furthermore...
I used both IPC and UPC as I stated above. IPC gives even a lower flow than UPC. IAPMO's calculator just restricts its use for Residential but has not talked about the scale. Any number of fixtures can be entered. However, I am also not willing to rely on it at the moment. 530 rooms of hotel...
Well the associated post has turned into another discussion :D "the wide variation between results obtained using different approaches of calculating water supply demand; UPC, IPC, Average Daily Consumption, ASHRAE Modified Hunter's Curves, Water Demand Calculator by IAPMO published in UPC 2018...
@PEDARRIN2
Well it's getting more and more confusing now. Hard to reach any final satisfactory demand. So many methods, so many approaches. I wonder why UPC and IPC standards are silent on these issues. According to your suggestion, I have 382 showers which means 764 GPM considering 2GPM each...
Hi everyone,
Need help on sizing a pump to feed water from bore to storage tank.
I have a underground storage tank of 200,000 gal. capacity. My water supply demand is 650 gpm. Reserving 60,000 for Firefighting I am left with 140,000 gal which will be supplied to the fixtures using 6 booster...
@PEDARRIN2
Thanks a lot for your reply. I read both of the above articles. Quite informative. I recalculated using IPC, it gives me a difference of approx. -167 gpm from UPC. I think I can go for 600-650 gpm to be on safer side.
Also, i now understand that both IPC or UPC give peak demand but...
@UFT12 Thanks a lot for your help. Yes it violates, that is why I had contacted NFPA and mentioned the same clause you referred to. Generally speaking, by your experience, 1250 gpm will be fine or not?
1:
"7.3.2.1 Hose connections shall be provided at each main floor landing of required exit...
Hello everyone,
I am calculating water supply demand for a 3B+G+9 commercial+residential building. I calculated from UPC 2015; total fixtures 5815 which translates to 650 GPM. I have been reading a lot of articles and discussions on this forum as well as other sites. But my confusion is still...
@LittleInch
Thanks for your detailed reply brother.
Domestic water supply, ok tell me then what does this 700 GPM mean according to Uniform Plumbing Code? I followed this approach:
I calculated number & type of private and public fixtures and then using the chart given in UPC CHART A...
Well according to NFPA support guys, I got this answer:
"I wouldn't apply the requirements of combined systems if the building is partially sprinklered. I would select the fire pump for the highest demand be that either the sprinkler system (per NFPA 13) or the standpipe system (per NFPA 14)...
NFPA 14 required.
"7.10.1.3.2 For a combined system in a building equipped with
partial automatic sprinkler protection, the flow rate required
by 7.10.1 shall be increased by an amount equal to the hydraulically
calculated sprinkler demand or 150 gpm (568 L/min) for
light hazard occupancies, or...
Thanks a lot for both replies. However, I would like to point out that at the moment I am just talking about the connection between ugwt and ohwt; the pumps supplying water to ohwt and the pipe carrying it. So in light of this,
@itsmoked: 1. how can i slow down the things? As i told you that...
Hi,
I have a pump sizing task at hand and want some expert opinion. Pumps have to supply domestic water from an underground water tank (ugwt) of 237,266 gal. to 2 overhead water tanks (ohwt) each of capacity 39,688 gal. meaning in total approx. 79,000 gal. According to UPC, total water supply...
Hello,
I am confused in selecting the required water supply demand and standpipe locations for firefighting system in a building. Building is partially sprinklered; 2 car parks and 3 commercial floors, remaining non-sprinklered are 7 residential floors. Occupancy is light and ordinary hazard 1...
I got a HAP file from a designer. The Total Sensible Coil Load is 200 MBH. However, in the table below which shows space-wise sensible cooling loads sums up to be around 49 MBH. I am unable to comprehend why this difference? HAP file is attached...
I think the answer lies in IPLV and Full Load Efficiencies of the chillers. As far as my limited knowledge is concerned, chillers are maximum efficient at part loads. Therefore using multiple chillers designed at part loads not only gives redundancy but also greater efficiency though at the cost...
Thank you all! got it now! if it is the entrance velocity then Q=Av gives us the area of the bell mouth entrance/exit section. The other end is off course sized equal to the duct.
The explanation regarding ambient temperature consideration sounds logical. Proposed equipment's catalogs should be referred to for this information. On the other hand, I would like to add that CRAC units (Computer Room Air Conditioners) or "Precision Air Conditioners" are used for Data centers...
