Thermal Energy Usage Calculations

Method #1: Baseline and post-retrofit measured lighting power levels and stipulated diversity profiles.

For each lighting circuit:

Annual energy use = (Power levels) x (24-hr stipulated profiles) x (number of days assigned to each profile)

For each lighting circuit:

Annual energy use = (Power levels) x (24hr stipulated profiles) x (number of days assigned to each profile)

None.

Method #2: Before/after measured lighting power levels with sampled before/after diversity profiles.

For each lighting circuit:

Annual energy use = (Power levels) x (24-hr sampled profiles) x (number of days assigned to each profile)

For each lighting circuit:

Annual energy use « (Power levels) x (24hr sampled profiles) x (number of days assigned to each profile)

None,

Method #3: Baseline measured lighting power levels with baseline sampled diversity profiles and post-retrofit power levels with continuous diversity profile measurements.

For each lighting circuit:

Annual energy use = (Power levels) x (24-hr sampled profiles) x (number of days assigned to each profile)

For each lighting circuit:

Annual energy use - (Power levels) x (continuous diversity profile measurements)

None.

Method #4: Baseline measured lighting power levels with baseline sampled diversity profiles and post-retrofit continuous sub-metered lighting.

For each lighting circuit:

Annual energy use = (Power levels) x (24-hr sampled profiles) x (number of days assigned to each profile)

For each lighting circuit:

Annual use = sub-metered lighting energy use.

None.

Method #5: Method #1, #2, #3, or #4 with calculated thermal effect.

Annual use = method #1, #2, #3, or #4 as appropriate.

Annual use = method #1, #2, #3, or #4 as appropriate.

Pre and post thermal load from the lighting is calculated using the component efficiency measurement methods for HVAC systems.

Method #6: Before/after sub-metered lighting and thermal measurements.

For each lighting circuit:

Annual use = sub-metered lighting energy use.

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