Hi
I am using option 1 a computer simulation model to carryout the calculations. I am trying to get the additional points for demonstrating the cost reduction in Process energy. The building in question has quite complex process energy with a lot of equipment, is there any boundary to what process equipment should be included or should every small pump and motor be included even if its only
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
April 2, 2014 - 11:54 am
All energy use within and associated with the project must be included in the models.
When modeling the process loads, you are allowed to use industry accepted values and schedules for the project type if you cannot determine the actual expected process load values. Two sources off the top of my head are COMNET and the 90.1 User's Manual. The other option is to account for each piece of process equipment and model it as accurately as you can. You could also determine a generic schedule for the process equipment and apply it instead of developing a schedule for each piece of equipment. So you have options relative to how you model the process.
Now if you are claiming energy savings relative to process you can't use the default values and schedules as the baseline. You will need to clearly state the baseline and defend it as reasonable. Some baselines for process are established like certain equipment within LEED for Retail. Beyond the established baselines reasonable is defined as the industry standard for that process within that building type in that geographic area.
When we do our modeling work we almost always inventory the expected equipment being installed and model that as accurately as we can including schedule modifications where applicable. The time to do so is factored into our fee proposal based on the expected process equipment likely in the job.
The basic issue here is how important is an accurate prediction to this particular project?
John McCullough
AssessorLEED Assessor
April 2, 2014 - 3:22 pm
Marcus,
Thanks for your response.
I was wondering about what you meant when you say " including schedule modifications where applicable". Do you just mean making chafes to the information provided and inputing it into the model.
I am going to to get all the input power form the machinery and possibly any steam driven process plant too and add it to the model, to get the most accurate comparison as hopefully get the points we need.
"Beyond the established baselines reasonable is defined as the industry standard for that process within that building type in that geographic area." Where would I get this if the process machinery is very specialised, is this covered in 90.1?
Thanks for your help.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
April 2, 2014 - 3:35 pm
I meant using different schedules for different pieces of equipment.
That is the point it is not covered by 90.1. Establishing the appropriate baseline is the responsibility of the project team. With specialized process equipment you would likely get this information from the owner, the product manufacturer, an industry association, designer who specializes in specifying the equipment, or other research sources.