Liberty Union Thurston High School
Based on the recommendations of our engineering study, the district proceeded with this very complicated 99,997 SF renovation of the existing high school. Minimal environmental impact and LEED Silver certification were project goals. The project was designed for maximum utilization of the existing building and systems that were judged to be serviceable and retained life expectancies in excess of the rest of the structure. By incorporating material reuse to the maximum practicable the project reduces pollution, has less demand on natural resources and significantly lessens the demolition waste generated. This project achieved LEED Silver Certification in November of 2012.
An example of this concept is the renovation of the existing air handlers and the cleaning of the existing medium pressure ductwork. Essential updates were included with the renovation to improve energy efficiency, without completely replacing systems. This approach gives the owner the benefits of modern technology while adhering to the sustainable design principle of building and resource reuse. The building design used sustainable and environmental practices in evaluating all the existing systems to decide to reuse or provide new. Systems included plumbing, fire protection, electrical power and lighting, as well as technology, communication, security systems as described in the 2007 Ohio School Design Manual.
The project included the replacement of two chillers of 145 nominal tons each. The chillers were specified and furnished with a heat recovery de-super-heater. Using heat that would otherwise be wasted to supplement the heating water system saves energy,resources and money for the school district. The air side of the system is a VAV with hot water reheats on each zone VAV box. Using heat recovered from the chiller to provide hot water for the reheat coils is the perfect application for recovered heat energy. Two new fully modulating boilers provide additional heat when necessary. The calculated energy savings of the systems are 26.2% compared to systems meeting ASHRAE 90.1 2004.