Advanced Heat Recovery (AHR) system


“What’s impressive is that it prevents about 1.8 million pounds of carbon dioxide from being released into the atmosphere each year, cutting the museum’s carbon footprint by 16 percent.  This is significant in the fight against climate change, stresses Patrick Hamilton, the museum’s Director of Global Change Initiatives, because buildings account for one-third of US greenhouse gas emissions.”


“We love that,” he said, “because it means we have $293,000 that can be redirected to the scientific and educational mission of the museum rather than to paying utility bills.”  Science Museum of Minnesota


“Here’s how it works. Heat generated by all the electricity used by the museum’s computer servers, elevator motors, telephone switching equipment and other big electricity loads is piped into the two heat recovery chillers rather than being rejected to the outside, as is standard procedure in most commercial buildings.  Inside the chillers, compressors step up the heat energy to produce 115 oF water, which then is used to warm incoming fresh, cold winter air and circulated through radiators along the building’s extremities. It makes no sense at all for the Science Museum to purchase energy to heat the building while at the same time it discharges hot air to the outside.

“You don’t throw your aluminum in the garbage at home.  You recycle it.  So, you should recycle the heat in your building instead of throwing it away,” explains Matt Presser, account manager at Ingersoll-Rand, which manufactures the Trane chillers used at the Science Museum.”