The Green Proving Ground program has commissioned Department of Energy National Laboratories to perform real-world measurement and verification of the following technologies in pilot installations in federally-owned buildings. Preliminary technology assessments are available below as PDFs.
Preliminary Technology Assessments
High Efficiency HVAC [PDF - 216 KB] High efficiency heating, ventilating, and air conditioning (HVAC) units are a new class of rooftop unit (RTU) that can reduce building energy needs by half without reducing HVAC effectiveness. Blowing conditioned air through central shafts and ceiling spaces, the new technology incorporates variable speed controls on the refrigerant compressor, valves, and fans to efficiently heat or cool designated spaces as desired. The high efficiency HVAC RTUs capture and reuse heat, cold, and humidity from a building’s exhaust air and utilize waste heat from the compressors to reheat air that has been purposely over-cooled. Greater Southwest Regional Project. Findings available in 2017.
Intelligent Energy Valves for Hydronic Systems [PDF - 212 KB] This technology reduces the power consumed by pumps in hydronic heating and cooling systems by maintaining an optimal temperature difference (Delta-T) between fluid supply and return lines. Findings available in 2017.
Smart Scrubbers for HVAC Load Reduction [PDF - 213 KB] This technology reduces the volume of outside air required to maintain indoor air quality (IAQ) by using absorbent materials to selectively remove contaminants from HVAC airflow. Findings available in 2017.
Variable Speed Screw Chiller [PDF - 212 KB] This chiller promises year-round savings by modulating capacity while maintaining performance. Findings available in 2016.