University of Hawaii at Manoa Benchmark Analysis

University of Hawaii Energy Study, Phases 1 and 2, and Benchmark Analysis

Honolulu, Hawaii

Phase 1 consisted of an energy conservation study for eight buildings at the University of Hawaii, totaling over 400,000 sf for HVAC, lighting, and building envelope upgrades. Phase 2 consisted of an energy conservation study for 40 buildings at the University of Hawaii, totaling over 1,000,000 sf for hvac, lighting, and building envelope upgrades.

We used this data along with other energy audit data to develop an overall benchmarking energy analysis including detailed energy monitoring, energy simulation analysis, identification, evaluation, and life cycle costing of energy conservation opportunities, summarized the annual baseline energy consumption, and recommended implementation costs and anticipated energy savings for the implementation of the ECOS identified during the energy audit stage, which totaled over 200 buildings and an annual energy cost of approximately $20,000,000 per year.

The energy audits were performed over 2,303,464 sf of building space in 2000 and 2001, with an estimated energy savings of 10,098,284 kW/year, or $1,037,250/year only for the buildings that were included in the energy audits. The estimated construction cost for the implementation of the recommended ECMs was $6,477,150, which was paid back in 6.2 years. If the energy savings predicted by the energy audits were extrapolated through the entire campus, the campus-wide energy savings would be as much as 25,729,000 kW/year, or $2,641,160/year, with a corresponding construction cost of $16,338,440 for the implementation of all ECMs. This would correspond to roughly a 20 percent reduction in the campus-wide electricity consumption.