GLUMAC

Commissioning MEP Engineering BIM Energy Modeling

Engineers for a sustainable future. Glumac specializes in cost-effective, sustainable design of mixed-use projects including residential, retail, office and entertainment facilities worldwide. With ten offices, nine in the Western United States and one in Shanghai, we are well-positioned to serve our clients. Our passion is engineering green buildings that work.

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Shanghai, China

201-500 employees

www.glumac.com/


Projects

The Wayne L. Morse U.S. Federal Courthouse

Project Type: Infrastructure

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The Wayne L. Morse U.S. Federal Courthouse in Eugene, Oregon, uses 45.0 kBtu/sf/yr, which is 14% lower than predicted in the original energy model calculation. The 267,000 sf Wayne L. Morse Federal Courthouse, completed in August 2006, provides six courtrooms plus support and administrative areas for the United States Courts for the Ninth Circuit. The lower floors are a two-story glass podium containing the administrative departments. Three sweeping curved metal and glass façade pods, housing six courtrooms and judges’ chambers, are connected by a central atrium. The building was the first U.S. Federal Courthouse to achieve LEED Gold certification. The following notable sustainable features are incorporated into the building’s MEP systems: Underfloor air distribution throughout the building Hydronic radiant floor system for heating and cooling in the main lobby and perimeter circulation areas Nighttime economizer cooling using the underfloor air system to pre-cool the building mass Waterside economizer for free cooling of 24/7 server rooms in winter Daylighting controls Waterless urnials As part of the project’s LEED Gold certification under LEED 2.1, the Courthouse achieved 10 LEED points for EA credit 1: Optimize Energy Performance. The energy model calculation showed 38.4% energy savings as compared to ASHRAE Standard 90.1-1999. This was equivalent to a predicted building energy use of 52.5 kBtu/sf/yr. Based on the most recent energy use data from January 2010, the building has an actual Energy Use Index (EUI) of 45.0 kBtu/sf/yr. These numbers include all electricity and natural gas use for the building based on metered data from the building management system (BMS). Actual building energy use is 14% better than predicted by the energy model, or 47% savings as compared to ASHRAE 90.1-1999. Commissioning and frequent follow-up played a key role in achieving these energy results. Glumac’s commissioning team pressure-tested every single underfloor air plenum to reduce air leakage to the GSA’s acceptable leakage criteria, which were developed by Glumac for this project. Glumac’s engineering and commissioning teams have continued to work with the GSA during the past few years to refine the chiller plant control sequences and optimize energy performance.