[Equest-users] How to Oversize Boilers & Chillers as per ASHRAE 90.1

[Omar Katanani]

Dear all,

 

ASHRAE 90.1 requires that you oversize chillers by 15% and boilers by
25%.

Having 2 chillers, I initially entered 1.15 for the capacity ratio for
each of the chillers.

 

I read a recent email on the forum saying that the capacity ratio must
be 0.575 for each (for a total of 1.15).

 

The issue is that the %improvement in the energy costs was 22.2% for the
1.15 Capacity Ratio and 16.5% for the 0.575 Capacity Ratio. The
difference between both scenarios translates to 3 LEED Credits, which is
super important!

 

I'd honestly like to use the 1.15 figure! Has anyone got a comment
review that he/she must use 0.575?

 

Many thanks,

Omar

___________________________

Omar Katanani
Sustainable Design Engineer

Email: omar at ecoconsulting.net

 

EcoConsulting (Lebanon)

Nahas Building, 4th floor

4 St-Maron Street / Georges Haddad Avenue

Postal Code: 2028 5806 SAIFI

Beirut, Lebanon

Tel:          +961 (0) 1 971 266
Mobile:    +961 (0) 3 045 045

 

EcoConsulting (UK) Ltd
28 Marshalsea Road
London, SE1 1HF
Tel:  +44 (0) 207 939 0989
Fax:  +44 (0) 207 939 0981

Website: www.ecoconsulting.net <http://www.ecoconsulting.net/> 

 

  

 

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