Over a billion watt-hours saved.*
Here is a sampling of the numerous projects we’ve been involved in.
Some are quite disparate, others a bit similar. But all ended up creating a smaller energy footprint.
*A very, very low estimate.
Presbyterian Hospital MatthewsMatthews, North Carolina
The building owner wanted to retrofit its 220,000 square foot hospital with energy-saving measures to become eligible for a lower electric rate from the local utility. To be eligible, the building owner had to demonstrate significant reduction in the average peak electric demand. The facility’s commissioning agent was using spreadsheets to determine the projected demand savings to meet this goal, but the spreadsheets were cumbersome. Based on the size and complexity of the project’s air system, the firm wanted to determine if an energy model would be more flexible than a spreadsheet.
The facility’s commissioning agent asked The Energy Studio to help make that determination. We built an energy model of the facility from existing paper drawings, calibrated it to utility bills and tested alternatives, like variable speed drives on the supply fans in each of the air handling units. Additionally, the systems had been running on a 24-hour schedule, despite the fact that the entire facility did not operate that way. By using the energy model, we were able to determine the cost benefit of reducing the operating schedule to 15 hours for some air handling units.
The study demonstrated that installing variable speed drives and reducing the operating schedule would reduce the peak operating energy demand of the facility by over 90 kW, making the building owner eligible for a lower electric rate.