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how to design SPUs for an Elevator room?
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Source：Internet Author：Unknow Pubdate：2010-06-17
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hvacers (Mechanical)
28 May 10 5:30
does anybody know the rule of thumb for elevators rooms in designing its SPU. what is its TR/sq.ft
thanks guys
ChrisConley (Mechanical)
28 May 10 11:02
I might, if I knew what a SPU was. A new acronym everyday, I love this industry.
DRWeig (Electrical)
28 May 10 14:32
Yes, please tell us what SPU means, and you might also want to spell out TR.
Good on ya,
Goober Dave
hvacers (Mechanical)
28 May 10 21:16
SPU = split packaged unit
TR= TONs of refrigeration
please advice on the tr/sq.ft
HerrKaLeun (Mechanical)
29 May 10 15:07
字串7
you should get data on the heat dissipation of the equipment, how often it runs, and do a normal load calculation.
There may or may not be a rule of thumb on ton/ft.. but that really can be wrong. I could imagine a high elevation elevator in high use buildings needs more cooling than a 2 story building elevator that has very efficient motors etc.
hvacers (Mechanical)
30 May 10 23:05
i have 5-units of 35kw motor its high rise elevator. assume that its efficiency is 85% and its use factor is 95%. what formular for heat dissipation can i use?
ChrisConley (Mechanical)
31 May 10 11:26
This is from an old question I once asked along these lines.
http://www.eng-tips.com/viewthread.cfm?qid=59911
walz (Mechanical)
31 May 10 11:47
字串3
SPU only for elevator rooms ... means you dont have fresh air and only the evaporating unit is recirculating the air within the room
if thats the case and the elevator machine room is interior with only possible roof exposed...
these could be the good range.
0.49 - 0.53 TR/sq ft
VEEKRISH (Mechanical)
2 Jun 10 2:41
Rather than using a thumb rule, I guess it is quicker and safer to do a load calculation. All you need is to factor in the fabric load and the Motor Load. Fresh Air would be Zero. No Occupancy and minimal lighting.
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