[Equest-users] Space heat differs a lot between proposed and baseline

[Omar Katanani]

Dear all,

If you have a baseline and a proposed design of a school, and every single input box in the boiler specs and the hot water loop is the same in both, is it possible to get a very different space heating consumption?!
This has made me crazy, one consumption is 4 times the other. 
I checked the schedules, schedules of operation, everything is the same! I tried a scenario where the boiler capacities are kept to default (autosize) and another scenario where I inputted the same number (1.5 MBtu/h). I am getting really different results. Is there any other variable that I may not be paying attention to?

The electricity consumption in the proposed is around 15% less than the baseline, but why is the gas consumption (space heating only) 4 times more?

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) 1 971 255
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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20100704/7e3e9b51/attachment.htm>