Building 4 – Chemeketa Community College – Salem, Oregon
Energy Modeling / Energy Analysis
Building 4 is a science and technology building located on the Chemeketa Community College (CCC) campus in Salem, Oregon. Originally built in 1975, the building and systems had fallen into disrepair by the time of the analysis. The college had assembled a design team to guide building renewal. SOLARC was tasked to use energy modeling to help define potential load reduction opportunities for the design team, and to identify energy efficiency incentives available from the Energy Trust of Oregon.
In our first task, a calibrated energy model was developed and used to analyze load reduction associated with the upgrade to the building envelope. Iterative model runs were performed to help the design team chose the best envelope option balancing first cost against energy savings and peak load reduction, i.e. HVAC system downsizing potential. Preliminary reports were provided to the mechanical engineer in order to adjust the sizing of the new equipment being installed with the new building load. The result of the first phase of the study was the successful use of the energy model to help the design team create an integrated design linking HVAC sizing with changes to the building envelope and internal lighting loads.
The second phase of work was focused on using the energy model to document incremental energy savings to obtain energy incentives. Solarc worked closely with the Energy Trust of Oregon to identify all energy savings opportunities associated with the building remodel and obtain financial incentives associated with the achieved energy savings.
Building size: 53,000 sq.ft.
Incremental annual electric energy savings: 194,590 kWh
Incremental annual energy cost savings: $13,038
Utility incentive: $58,377
Energy Efficiency Strategies Identified and Implemented
- High Efficiency Interior LED lighting upgrade
- Insulated interior of existing mass walls
- Insulate existing uninsulated metal paneling
- Upgrade windows to high performance, double pane windows with thermally broken frames
- Replace failing multi-zone units with a Variable Refrigerant Flow (VRF) heat pumping system with dedicated outside air system (DOAS) for ventilation.
- New HVAC controls with optimized scheduling and control sequences.