Forum discussion
NC-2009 EAp2: Minimum Energy Performance
The energy consumption of humidification system has to be equal in baseline and Proposed building??
Is it considered process load??
In my model the energy consumption of both models is very different, being the same system with the same RH Humidification set-point in both models.
What energy consumption I have to consider in the leed template?
Thanks in advance.
LEEDuser is supported by our premium members, not by advertisers.
Go premium forTo post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.
A portion of our building envelope is historic. Can we exclude it from our model?
For an existing building, do I need to rotate the model?
Our process load is higher than 25%. Do we have to justify that?
Our local code references ASHRAE 90.1-2010. Should I use that for my documentation, or 90.1-2007?
Can mezzanines open to floors below be excluded from the energy model?
How do I provide a zip code for an international location?
For a project outside the U.S., how do I determine the climate zone?
For a project outside the U.S., how do I determine the Target Finder score?
Do hotel rooms need automatic light shut-off control?
How commonly are the 90.1 mandatory compliance forms submitted as part of EAp2/EAc1?
The Section 9 space-by-space method does not include residential space types. What should I use?
Can the Passive House Planning Package (PHPP) be used to energy model for LEED?
Which baseline HVAC system do I use if my building has no heating or air conditioning?
Our project has a diesel backup generator. Should we include it in our energy model?
Can SHGC be higher in the proposed than in the baseline model?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
January 11, 2018 - 10:30 am
Yes this is a process load. The energy use can differ and that is allowed. Provide an explanation to the reviewer for why it is different and demonstrate that the same system and settings have been modeled in both.
Markéta Vagenknechtová
April 20, 2018 - 7:34 am
Hi,
we have the same problem with different energy use in humidification.
Here is simple description of our project:
Baseline: 6 air handling units with humidifier and without heat recovery; supply airflow of each unit is around 34000 cfm, outdoor airflow of each unit is around 4800 cfm
Proposed: one air handling unit with humidifier and with rotary heat recovery; supply airflow = outdoor airflow = outdoor airflow of baseline
Baseline and Proposed have the same RH humidification setpoint, humidifiers have the same rated capacity, rated power and other parameters. But energy use is different (Baseline - 260 MWh, Proposed 153 MWh). Is it caused by different supply airflow and missing heat recovery in Baseline? Is this explanation sufficient for the reviewer?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
April 20, 2018 - 3:17 pm
Given the information provided the savings is justified. However, the reviewer would likely question why the supply airflow in the baseline is so much greater than the proposed. Something is not right with the baseline supply airflow which is probably causing the more than one would reasonably expect savings.