[Bldg-sim] Energy Savings vs. Energy Cost

[Hernandez, Arturo]

This indeed could be possible.  However, I would be careful and question
why you have such a peak demand.  For instance if the peak demand only
occurs for 2-5 minutes and the rest of the day you average 20-40% off
your peak you might have a schedule problem (i.e. fans, pumps, heating
coils, all turn on at the same time).  Otherwise if your peak demand is
pretty consistent with the actual load heating load this is entirely
possible.

 

ARTURO HERNANDEZ, Mechanical
OWP/P


PLEASE CONSIDER THE ENVIRONMENT BEFORE PRINTING THIS EMAIL 

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Steve
Mignogna
Sent: Wednesday, September 17, 2008 10:38 AM
To: Don Lipinski
Cc: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Energy Savings vs. Energy Cost

 

Don-

While it is not common, sometimes depending on the utility rate
structure and/or mechanical systems this does happen.  For example, the
1 Bryant Park (Bank of America) building while it received many LEED EA
credits (and a LEED platinum rating) did not really save that much if
any in total energy use.  The reason for this was its use of an ice
storage system which shaves off the peak demand and moves it to off-peak
times such as during the night.  As long as the utility rates and model
were built correctly, I would rest assured that your results are
accurate.

-- 
Steve Mignogna
Atelier Ten

On Mon, Sep 15, 2008 at 6:48 PM, Don Lipinski <donl at auseea.com> wrote:

My building model has 3.9% energy savings, but 24.6% savings in energy
cost because of heating demand. 

The structure is approximately 1 cent per kWh and $12 per kW.  All the
heating savings, saves on peak demand and therefore saves more money
then energy.  Since LEED is based on energy cost, is it safe to assume
that the my building will achieve the 5 points?  Has anyone run across
this situation. 

thanks, 

Don


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