TARC – Union Station
Louisville’s transit agency is taking steps to improve energy efficiency and preserve Union Station. The longtime railroad station originally opened in 1891 with TARC taking over the site in 1979. The current heating and air-conditioning systems were last upgraded at that time, making the upgrade of the systems a priority. Kerr-Greulich Engineers, Inc. has been consulting on this project for several years to help maximize building performance. The historical nature of the building made adding HVAC to the building a very intensive design exercise. Envelope improvement and pressure testing of the facility ensures the HVAC system will perform as expected and the energy use of the building will be minimized.
Highlights of KGEI’s design include:
- A hybrid geothermal system was designed for the building. The system utilizes water source heat pumps throughout the facility to provide zone heating and cooling to the space. The geothermal wellfield was sized to operate the building during the majority of the year and high efficiency boilers and a cooling tower are used to maintain loop temperatures during periods of extreme weather or load.
- Dedicated outside air units with energy recovery are used to provide ventilation to the building, while minimizing the energy lost through exhaust.
- The smoke evacuation system for the large building atrium was evaluated and several components replaced to ensure it operates as intended to preserve life safety in the building.
- Efficient LED lighting designs and automatic lighting controls were used to replace lighting in the building where ceilings modifications were made.
- A DDC Building Automation System will ensure the building systems operate efficiently and maintain occupant comfort.