Scenario Energy Cost - Total Energy Use Cost versus Usage Cost

Question

All, 
 I'm running some scenario cost estimates and I noticed a difference between Total Energy Use Cost on the pump usage tab and the Usage Cost displayed on the top of the scenario energy cost tool. How are these different? In some cases I'm seeing a significant difference between these two values. 
 Thanks, 
 Scott

Scott Kampa · Accepted Answer

Hello Scott, 
 The Usage Cost includes any storage costs associated with the tanks in the model. Basically, Usage Cost is the sum of the Total Energy Use Cost and the Storage Cost. A good place to look at the data is to highlight the energy cost item and select the Summary tab. 
 
 There you will see the pump cost (which is the Total Energy Use Cost in the Pump Usage folder), the storage cost from the tank storage, the Usage cost. 
 More information on tank storage in energy cost scenarios can be found at the following link: communities.bentley.com/.../15909.why-is-there-an-energy-cost-associated-with-a-tank-solution-500000009716.aspx 
 Regards, 
 Scott Kampa 
 Bentley Technical Support

Jesse Dringoli · Answer

Hello Scott, 
 The difference might be with the cost associated with change in storage for tanks. Check the Cost under the Storage tab. 
 You can read more about storage energy costs here: 
 communities.bentley.com/.../15909.why-is-there-an-energy-cost-associated-with-a-tank-solution-500000009716.aspx