[Equest-users] Equipment Sizing and % Hrs in Throttling Range
Mathew Higgins
higgins at edi-arch.com
Sat Jan 17 14:59:24 PST 2009
All - I'm trying to resolve a gshp school system model, to reduce the
number of hours outside of throttling range for LEED purposes. I have
scowered multiple threads talking about sizing, throttling range, min
air flow ratios, reverse-action TSTATs, night-setback, gshp's, etc. and
have applied suggestions with minimal result. The only way I can take
considerable hours out of the % not in throttling range is if I increase
sizing ratios way beyond design capacities and strip out everything that
makes the model accurately reflect design conditions.
I've attached the before and after (.pd2) files for reference, however
results are still not seen. SS-R reports indicate hours in the 100+ load
range, but again this is going beyond manually specifying capacities and
using sizing ratios. Also to be noted, the ASHRAE baseline (Pkg Elec HP)
is also in the same range and is not responding to changes... which
would suggest something common to both within Appendix G criteria.
Experience and opinions would be greatly appreciated.
--
Matthew Higgins, LEED AP + ASHRAE-HBDP
Technical Specialist
Environmental Dynamics, Inc.
Architecture and Sustainability Consulting Services
505.242.2851
Any data provided by the Consultant, verbal or written, are to be considered opinions of building energy and/or daylight performance. The Client understands that the Consultant has no control of occupant habits, equipment or material performance or characteristics, site or climate conditions or the Contractor's method of assembly, and that the Consultant's opinions regarding building energy/daylight performance are made on the basis of the Consultant's professional judgment and experience. The Consultant makes no warranty, express or implied, that the energy/daylight performance of the building will not vary from the Consultant's opinion of building energy/daylight performance.
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