21. Much of the cost of generating electricity involves building operations to satisfy peak demand . 22. In this way, gas could be conveniently and inexpensively withdrawn during peak demand times. 23. India's electricity output falls short of peak demand by some 31 percent, analysts say. 24. Peaking power plants operate only during times of peak demand . 25. "What you're trying to do is shave your peak demand . 26. The plant is primarily used during periods of peak demand . 27. In periods of peak demand , logic tells us, discounts are not to be found. 28. It is run by Landsvirkjun and generates electricity during the peak demand winter months. 29. Peak demand dropped by 10 . 7 percent in July from July last year.30. In planning for this summer, the utility anticipated peak demand of 11, 650 megawatts.