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Sustainability — LEED

UEM supporting LEED Building Projects

The United States Green Building Council (USGBC) has recognized the energy and environmental benefits of buildings connected to district energy systems and utilizing combined heat and power. Beginning with LEED for New Construction version 2.2 and continuing through LEED 2009, project buildings can earn additional points in Energy Atmosphere Credit 1 by outlining their connection to a district energy system like the one operated by Utilities and Energy Management (UEM).

Obtaining these points requires following USGBC’s guidance document Treatment of District or Campus Thermal Energy in LEED V2 and LEED 2009 – Design & Construction. The requirements are limited to Energy and Atmosphere and seek to ensure that upstream generation equipment meets the intent of LEED certification. The following prerequisites and credits are impacted for building projects on the UT Austin Main Campus:

- EAp2 and EAc1 - Energy Performance

- EAc3 - Enhanced Commissioning

- EAp3 and EAc4 - Refrigerant Management

- EAc5 - Measurement and Verification

The required additional submittal documents are available on this page and are updated as required by LEED projects. If more current information or additional information is needed, contact Ryan Thompson.

View UEM's compliance with the new LEED guidelines.

EAp2 and EAc1 - Optimize Energy Performance

The following document outlines the modeling method and approach typically utilized to incorporate DES/CHP as well as the supporting efficiency data:

EAc3 - Enhanced Commissioning

The USGBC guidelines extend the commissioning requirements beyond the building itself to include the district energy system. This is addressed through a narrative, provided here:

EAp3 - Fundamental Refrigerant Management

The USGBC guidelines expand the zero-CFC requirements from the project building itself to the chilling stations supplying the building.  In the case of UEM, which does operate a single CFC charged chiller, a phase out commitment and action plan is required.  This commitment was signed in April of 2009, with a full phase-out of CFCs by February of 2015.

EAc4 – Enhanced Refrigerant Management

Due to a single CFC chiller, UT does not currently meet the requirements of this credit, and any building utilizing the USGBC district energy guidelines is incapable of obtaining this point. However, after the scheduled retrofit of the chiller in February of 2015, this point will be attainable. Any building with a scheduled substantial completion after February of 2015 can pursue this credit.

The planned chiller inventory and supporting information is provided below, in the format required for LEED submittal.

Required Submittals:

EAc5 – Measurement and Verification

The USGBC guidelines require that the DES/CHP efficiency values used in modeling for EAc1 follow the intent of EAc5 and can be measured and verified. The narrative supporting these requirements is available here:

 

*requires the free Adobe Reader or compatible software
**requires Microsoft Excel or Excel Viewer