#889 Implicit residential enduse load magnitude are incorrect

[David P. Chassin]

The load shapes are based on ELCAP data which is given in kWh/h. Therefore the power should be 1 kW (or energy 1 kWh) for 1 hour analog samples given no improvement in efficiency relative to the original ELCAP data. If an improvement in efficiency is desired (which is recommended for many appliances) then lower powers should be used, e.g., 800 W for a 20% improvement. If an increase is enduse demand is desired (which is possible for things like plugs), then higher powers should be used, e.g., 1200 W for a 20% increase.

[David P. Chassin]

Some important data for scaling load shapes from 1990 ELCAP to 2010:

//                              pu.kW   pu.kW
// End use          EF change   1990    2010
// ---------------  ----------  ------  ------
// Refrigerator     207%        1.00    0.33
// Dishwasher       114%        1.00    0.47
// Clotheswasher    102%        1.00    0.50
// Freezer          65%         1.00    0.61
// Air conditioner  46%         1.00    0.68
// -------------------------------------------
// Source: American Enterprise Institute, 2014

[David P. Chassin]

Another important aspect of this that is not well understood by users is that the analog loadshapes are only valid for aggregate load models. For individual loads they are wrong in the sense that they only provide the average load at any given time and do not accurately represent more realistic instantaneous loads that are observed in reality.

This is related to ticket:799.

[David P. Chassin]

With the exception of including the new RBSA data, the problem of updating loadshapes and enduses is not going to get addressed before the knothole.