Keeping things cool at HBS during the hot summer months is the chilled water plant, a 19,700-square-foot facility located underground near the B-School parking lot. With hundreds of thousands of gallons coursing through miles of pipe, the plant operates on a heat-exchange principle, using evaporation and four refrigeration machines, or chillers (in background). Through the blue pipes, cool water is pumped to campus from which it returns as warm water, which is sent through the chillers. Heat is transferred to water in the green pipes, which is pumped to cooling towers and cooled by evaporation. Then it’s back to the chillers and the process begins anew. The red pipes are for fire protection.
Photograph by Mark Alcarez