The ratio of the average energy usage during noon and 6 PM on summer weekdays to the total annual energy usage is taken from load shape data collected for a water heater and HVAC demand response study for PJM. The factor is constructed as follows: Obtain the average kW, as monitored for 82 water heaters in PJM territory, for each hour of the typical day summer, winter, and spring/fall days. Weight the results (91 summer days, 91 winter days, and 183 spring/fall days) to obtain annual energy usage. Obtain the average kW during the 2 PM to 6 PM time period on summer weekdays from the same data. These are the hours that PJM has defined as peak hours . The average weekday 2 PM to 6 PM demand is converted to average weekday 2 PM to 6 PM demand through comparison of weekday and weekend monitored loads from the same PJM study. The ratio of the average weekday 2 PM to 6 PM energy demand to the annual energy usage obtained in step 1. The resulting number, 0.00008294, is the EnergyTo Demand Factor. The load shapes (fractions of annual energy usage that occur within each hour) during summer week days are plotted for three business types in Figure 26
The ratio of the average energy usage during noon and 6 PM on summer weekdays to the total annual energy usage is taken from load shape data collected for a water heater and HVAC demand response study for PJM. The factor is constructed as follows: Obtain the average kW, as monitored for 82 water heaters in PJM territory, for each hour of the typical day summer, winter, and spring/fall days. Weight the results (91 summer days, 91 winter days, and 183 spring/fall days) to obtain annual energy usage. Obtain the average kW during the 2 PM to 6 PM time period on summer weekdays from the same data. These are the hours that PJM has defined as peak hours . The average weekday 2 PM to 6 PM demand is converted to average weekday 2 PM to 6 PM demand through comparison of weekday and weekend monitored loads from the same PJM study. The ratio of the average weekday 2 PM to 6 PM energy demand to the annual energy usage obtained in step 1. The resulting number, 0.00008294, is the EnergyTo Demand Factor. The load shapes (fractions of annual energy usage that occur within each hour) during summer week days are plotted for three business types in Figure 26
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