Hi all,
1) I need to make my proposed model use energy less than 300kWh/m2/yr, and
2) I have to indicate how much energy the proposed model can save compared to a baseline model.
I am not sure how to build a baseline model.
To create a baseline model, do I have to follow all the materials on ASHRAE 90.1 and change all the setting on eQUEST SD wizard while keeping energy consumption of 300kWh?
Or is there a baseline already made?
Does anyone know how to do the above while satisfying 1) and 2)?
Thank you for help.
There are a couple of ways to do what you are asking.
- Start by creating your proposed building design with all of the ECM
features and proposed HVAC systems
- For most of your ECM's that are straight forward you can use parametric
runs under the TOOLS menu in DDedit mode to 'back-out' the proposed
performance down to the baseline performance values. Basic things would
include changing insulation values, changing glass u-values, overhangs, LPD
values, equipment efficiencies, etc. The results of your complied
parametric runs will represent your baseline building performance results.
- OR (I use this method when my proposed HVAC systems are different from
the required baseline HVAC systems.) After you have created your proposed
model and have it calibrated to debug it and reduce your throttling hours
out of range to acceptable levels then do a "Save As" of your proposed file
to create an identical file that you will adjust to represent your baseline
performance values. Using this method allows you to re-input the baseline
HVAC systems in the main eQuest systems & plant screens rather than trying
to change your systems via the parametric runs tool. I then go back and
reinput all of the other design characteristics to match my baseline values
that I am using.
- Now I have two separate files for the baseline & proposed cases, but I
am assured the initial inputs of the building (area, shape, window
placement, etc.) are identical for both building models. The only variances
are the ones I have made to represent thermal performance values.
- By reducing the performance values in your basline model you will see
the annual energy consumption increase above the proposed model results
provided that your simulation is working correctly.
pasha
2010/4/29 Ju-Yeon Julie Shin
To add to the discussion on a stepped back and more general level - the
phrase "baseline model" doesn't mean anything specifically by itself.
The decision of whether you're supposed to use 90.1 to your define your
baseline (or some other baseline standard criteria, or the existing
building, and/or your own sole judgement) is determined by the nature of
the project and why you're performing energy modeling in the first
place.
Pre-made baselines, in the context of 90.1, do not exist as they're
unique to every proposed design. If you're looking for a predetermined
baseline performance based on energy consumption, you might consider
using a tool like Energy Star or similar resources that offer "average"
EUI figures for various building types/sizes/locations.
NICK CATON, E.I.T.