The temperatures in the high 70s this week are a reminder that summer will be here before you know it. And with warmer weather comes the constant hum of air conditioning. Have you ever come home from work on a sweltering July day and turned up your AC or fans just to cool down?
Well, you’re not alone. And for our regional electricity grid, all those residents switching on their air conditioning means high demand for energy during the hottest part of the afternoon. To help offset this demand, large property owners including the City of Philadelphia participate in a load management program.
Here’s how it works: When the grid is stressed by high demand, building operators in City-owned facilities reduce the energy consumed in those buildings. By turning up our thermostats a few degrees and cycling certain building equipment off and on, the City helps to avoid brown-outs, blackouts, and can prevent equipment damage.
Even better, participating in this program generates revenue. Over the past five years, the City has earned nearly $2 million dollars through our regional grid operator PJM’s emergency demand response program. Through its other load management programs, the City has avoided millions more in energy costs. Not bad for a few hours’ work.