We are currently working on a naturally ventilated project located in Lima, Peru and we are having problems achieving the minimum 5% saving in energy consumption for the energy prerequisite. The project is a high voltage laboratory with a faraday cage, which is part of a university.
For the energy model, we assumed the following miscellaneous loads according to ASHRAE:
Educational Facilities - Laboratory (university college - high intensity) - Exh 5 L/(s*m2) Miscellaneous: 270.00 W/m2
Since the entire laboratory is naturally ventilated, the only consumption in the building originates from interior and exterior lighting and interior equipment, which make up 1.1% – 0.2%, and 98.8% of the total consumption respectively. Due to the high component of equipment, the component of interior lighting design is barely reflected in overall savings, although individually the lighting design reduces consumption by 37%.
Is there any form that this project can achieve the minimum energy savings?
How can the energy savings for lighting be better considered?
Is the miscellaneous load correctly assumed for such a high voltage laboratory with a faraday cage?
Waleed AlGhamdi
Sustainability EnablerEskew+Dumez+Ripple
18 thumbs up
July 27, 2020 - 5:49 pm
Given the details you mentioned, is there a reason you chose to follow option 1 instead of option 2 for the project? Are you planning to achieve more credits under "Optimized Energy Performance"? It seems like the Whole Buildign Energy Simulation is not that best approach for this building if there is niether heating nor cooling nor ventilation.
On another note, how is ASHRAE 62.1 2010 being met for Minimum Indoor Air Quality?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
July 28, 2020 - 1:05 pm
The intention for such heavy process load intensive projects is to address the process load! Can you find ways to reduce the energy use of the process loads instead of assuming that they are a given and there is nothing you can do about it? I have no idea if your assumptions are correct or not but given the dominance of the process loads I would seek more information oabout the actual loads instaed of using ASHRAE default values. Model the actual equipment load and seek savings from these process loads using the exceptional calculation method.