By Philadelphia Business Journal

PJM Interconnection said Monday that last weekâ¿¿s heat wave spurred a record Saturday demand for electricity by users of the power grid it manages.

The Valley Forge, Pa., nonprofit said its preliminary figures show that demand peaked Saturday at 128,452 megawatts, more than 8,000 megawatts greater than the previous Saturday peak demand of 120,324 megawatts, which occurred on Aug. 13, 2005. Eight thousand megawatts is enough power to run a major city. PJM manages the power system and runs a power market for 51 million people in all or part of Pennsylvania, New Jersey, Delaware, Maryland, nine other states and Washington, D.C.

Last weekâ¿¿s heat wave also resulted in the peak demand for every day of the week being higher than the peak demand for all of last July, which was 116,599 megawatts. The peak demand so far this summer has been 136,684 megawatts, nearly 9,900 megawatts more than the peak demand last summer, which was 126,805 megawatts.

PJM said the amount of air conditioning required in its service territory has been 77 percent higher this summer than last summer and 44 percent higher than normal, according to the National Weather Service.

Copyright 2010 American City Business Journals
Copyright 2010