×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

LEED 2009 EA C1.3

LEED 2009 EA C1.3

LEED 2009 EA C1.3

(OP)
For Leed EA C1.3 calcs to comply with Core Perf Guide:
We need to provide load calcs, zone by zone load calcs at design conditions, Fan sizing calcs, critical path supply duct pressure load calcs and part load condition calcs.

10 story building
6th floor occupied by one tenant
Chilled water AHU unit on floor in mech room
Series VAV boxes, cooling interior, elec heating exterior
DOAS - RTU provides 15% OA. OA is cooled by chilled water to 55 degf. No heating. Total energy wheel DOAS on roof to provide OA to each floor.
Heating only by Series boxes not at DOAS

Project not performing energy modeling. will use prescriptive path using Core Performance Guide. (This is for LEED EA C1.3)
Load calcs were performed in Trace, will upload for heating and cooling loads at design conditions and full occupancy.
Will upload zone by zone load calcs at design conditions
The AHU and main duct loop was designed and built by base building contractor. Do we need to provide calcs for duct loop? It is existing by base building.

Need to provide part load calculations for this system. Is there a standard AHRI or Ashrae criteria for this?
Standard outdoor conditions are 95DB/78WB, and indoor are 75/62.5

Can 50% occupancy and 85DB/70WB be used arbitrarily to establish part load conditions for the purpose of this calc, run it in trace and see what tonnage is?
Will this work or can this point only be achieved by full energy simulation? We are not modifying base building systems and it does not seem like practical to do energy modeling for the entire building.
The AHU only serves this floor, which is 100% of the capacity of the unit. However, the chiller serves 9 other floors also, which are same size. Energy model will not give an accurate representation of the tenant usage for 6th floor.

How do we determine motor demand at 50% of design flow for the existing unit fan? It was installed in ~2010. Is this done by testing or manufacturer data?
















RE: LEED 2009 EA C1.3

Since your firm will need to follow LEED for most new incoming projects it would be better to purchase an energy modeling program like Carrier HAP, Trane Trace etc and learn how to use it to meet LEED requirements. You would need to do a lot of trials to get as much LEED points you can get. This would be easier done with the modeling software program. Also the modeling program is set up to automatically provide the LEED documentations required with each run.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources