DENVER — When a massive event center was being developed in Denver, planners had to contend with two existing 6-foot-wide sewer pipes that emptied into the river, creating an unsightly dilemma.

Add Yahoo as a preferred source to see more of our stories on Google. A wastewater heat recovery system operates Tuesday, Dec. 2, 2025, at the National Western Center in Denver. (AP Photo/Brittany ...

Geothermal heat exchangers almost always use condenser water or glycol as the heat transfer medium — and, sometimes, refrigerant. Wastewater heat recovery systems typically preheat domestic cold water ...

DENVER — The largest wastewater heat recovery system in the United States has been launched at the National Western Center (NWC). NWC said the system is part of its goal to create a low-carbon campus ...

For heat recovery to be cost effective, it is essential for processes to be well coordinated and the cooling water discharge temperature needed for the process must be reached. Examples for use of ...

A wastewater heat recovery system operates Tuesday, Dec. 2, 2025, at the National Western Center in Denver. (AP Photo/Brittany Peterson) DENVER (AP) — When a massive event center was being developed ...

DENVER (AP) — When a massive event center was being developed in Denver, planners had to contend with two existing 6-foot (1.8 meters) wide sewer pipes that emptied into the river, creating an ...

A wastewater heat recovery system operates Tuesday, Dec. 2, 2025, at the National Western Center in Denver. (AP Photo/Brittany Peterson) A wastewater heat recovery system operates Tuesday, Dec. 2, ...