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Right now I am deciding between writing a hand calculation (for which sources are readily available) to calculate energy savings for replacing a supply fan electric motor with one of higher efficiency and of the same size. The energy savings would need to be general enough to have energy/demand savings for motor replacements of varying rated powers. Currently, I do not see any motor sizing functionality in Energy Plus, so I do not believe this could be done via modeling (since power-efficiency curves are not an available object for supply fan motors or motor sizing cannot be specified). Energy savings per horsepower would be a desirable outcome from the modeling effort, and if anyone could let me know if this is possible, that would be great. Additionally, if someone has a compelling argument to go with the hand calculation method as an alternative to the modeling approach, that would be equally beneficial.

Right now I am deciding between writing a hand calculation (for which sources are readily available) to calculate energy savings for replacing a supply fan electric motor with one of higher efficiency and of the same size. The energy savings would need to be general enough to have energy/demand savings for motor replacements of varying rated powers. Currently, I do not see any motor sizing functionality in Energy Plus, so I do not believe this could be done via modeling (since power-efficiency curves are not an available object for supply fan motors or motor sizing cannot be specified). Energy savings per horsepower would be a desirable outcome from the modeling effort, and if anyone could let me know if this is possible, that would be great. Additionally, if someone has a compelling argument to go with the hand calculation method as an alternative to the modeling approach, that would be equally beneficial.

Right now I am deciding between writing a hand calculation (for which sources are readily available) to calculate energy savings for replacing a supply fan electric motor with one of higher efficiency and of the same size. The energy savings would need to be general enough to have energy/demand savings for motor replacements of varying rated powers. Currently, I do not see any motor sizing functionality in Energy Plus, so I do not believe this could be done via modeling (since power-efficiency curves are not an available object for supply fan motors or motor sizing cannot be specified). Energy savings per horsepower would be a desirable outcome from the modeling effort, and if anyone could let me know if this is possible, that would be great. Additionally, if someone has a compelling argument to go with the hand calculation method as an alternative to the modeling approach, that would be equally beneficial.