I have a general question about handling of time slices. For a given time slice set up, for each time slice we can specify the 'hours' and the 'value' in each time slice. Assuming we have a system energy load shapes (% of annual energy) as well as availability shapes for variable renewables. My question is: if we have different 'hours' from one time slice to the next, does LEAP and NEMO use this as a unique weighting of each time slice in its calculations of results? To put it as a simple example, if there are 4 time slices in a model, and the hours are 1000, 1000, 1000, 5760 - will there be more "weight" placed on the fourth time slice in calculation of final annual results?

Thank you,

Matthew Davis

The very short answer is yes, LEAP factors in the width (number of hours) in a time slice when performing calculations. Converting the % of annual energy into a corresponding power requirement (and % of peak load in a year), and vice versa, is an example of when differential time slice widths would affect the outcome. For availability shapes, the value you insert into the yearly shape is simple the value taken for all hours of that time slice. You may (or you can view within LEAP) the "yearly mean" from a time-sliced shape, and LEAP is well aware of the number of hours in each time slice when performing that calculation.

Do you have something else specific in mind when you say "weight"?

Taylor

Thank you for the reply.