New School Campus Achieves Low Energy Usage Through Geothermal System
Recent success at Discovery Elementary in Arlington, Virginia led to the Maryland Energy Association seeking sustainable design and commissioning expertise for Wilde Lake Middle School. CMTA was tasked with contributing recent lessons learned in a Net-Zero Focused design charette, as well as providing LEED enhanced commissioning.
CMTA's Commissioning team performed an in-depth analysis of the advanced metering system, demand control ventilation system, geothermal heat pump compressor operation and lighting control system to ensure that all energy conservation measures were being implemented correctly. CMTA dedicated many hours to fine-tuning and ensuring that the systems operated according to the designed sequence of operations.
The school realized significant energy savings through the use of multiple strategies, including: optimum solar orientation, a tight building envelope, appropriate use of glazing, occupancy sensors and high-performance HVAC systems. To achieve Zero Energy, the school installed solar photovoltaic panels totaling 635 kW, comprised of 1,450 rooftop and 450 ground-mounted panels that produce approximately 829,000 kWh of electricity per year.
The building performance data after one year indicates that a building initially designed with an EUI of 20.3 now performs with an EUI of 13.8, a significant difference.