Projects: Sustainability

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.


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Punahou School K-1 Campus

Punahou School Kindergarten and 1st Grade Building


GBCI Certified LEED Platinum

Provided the mechanical and electrical engineering design work for plumbing, ventilation, air conditioning, fire protection, power and lighting to support the renovation of the existing Wilcox Kindergarten Building and construction of the new 1st grade complex.  The new K-1 complex is the largest building in the islands with platinum certification under the U.S. Green Building Council’s Leadership in Energy and Environmental Design, or LEED, standards.

The new 1st grade building’s mechanical scope of work included providing plumbing to all plumbing fixtures throughout the building; providing DX split system air conditioning units and natural ventilation features for all classrooms; incorporation of LEED features including the use of Carbon Dioxide demand controlled ventilation, occupancy sensors, water saving fixtures, and renewable energy sources; coordinating site utility connections with the prime contractor’s civil engineer; and providing fire sprinkler protection in each building if desired by the school.

The Wilcox Building had both mechanical and electrical engineering design work.  The mechanical scope of the project included removing the existing DX split systems and all existing plumbing features; providing new DX split air conditioning and natural ventilation features for all classrooms; providing new plumbing throughout the building; providing fire sprinkler protection throughout the building; and incorporating LEED features.

The electrical scope of work included removing existing lighting, receptacles, conduits, and electrical systems throughout the existing Wilcox Building; providing new power/telecommunication devices, fire alarm, and lighting to support the renovation of the Wilcox Hall; providing new power and telecommunications distribution to the Punahou K-1 campus; providing power/telecommunication devices, fire alarm, and lighting systems to the new classroom buildings as well as the Amphitheater and exterior site areas on the Punahou K-1 campus; and incorporating LEED features as much as possible.

In an effort to provide for as much as 60% of energy costs with on-site renewable energy, approximately 1,350 solar photovoltaic modules will be installed on the Punahou K-1 campus for a total system size of 270 kW.  Solar modules will be installed on the roofs of all buildings on the Punahou K-1 campus with the exception of Wilcox Hall, as well as on covered walkway canopies.  Additionally, electrical systems will be individually monitored and metered in order to track energy usage and savings on campus.



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Maui Community College Science Building


GBCI Certified LEED Silver

Currently providing the mechanical and electrical engineering work for a new two level, 50,000 sf science building being designed for LEED silver.  The scope of work includes providing the following:

  • Plumbing to all of the new plumbing fixtures throughout the building.  Plumbing fixtures will be ultra-low flow type to maximize LEED credits.
  • Acid-waste plumbing to all acid handling plumbing fixtures that will drain through a central neutralization tank.
  • Support for the new generator including a fuel tank and ventilation.
  • Hot water system consisting of solar water heating panels with gas back up.
  • Evaluate air conditioning options for the new Science Building.  Options would include providing a standalone air conditioning system for the building (air cooled or water cooled), connecting to the existing campus central loop and expand the central plant as required to accommodate the new load.
  • VAV air conditioning throughout the existing building with central station air handling units.
  • 24 hour air conditioning for data and telecomm rooms.
  • Exhaust ventilation for the laboratory hoods, hazmat storage and restrooms.
  • Specialty ventilation for the machine shop and shop operations.
  • Heat recovery for laboratory hood exhaust to pre-cool outside air intakes.
  • Evaluate and implement a wind turbine on the grounds of the facility if deemed feasible.
  • DDC system to monitor and control all HVAC equipment.
  • Demand control ventilation for maximum energy savings.
  • Fire sprinklers throughout the building.
  • LEED alternatives to the greatest extent possible.



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Benchmarking Study for State Facilities on Oahu


InSynergy Engineering, Inc. provided the mechanical and electrical engineering design work for preparation of a benchmark analysis study for state facilities on the island of Oahu. Our scope of work included carrying out the following data collection activities:

  • Obtained and reviewed previous reports, energy audits, and spreadsheets prepared under the State Energy Analysis Project, Phases I and II.  Identified which buildings were surveyed/audited, and summarized the results of the analysis for each building, including total energy consumption, square footage, end-use energy, and energy savings, costs, and payback for each Energy Conservation Measure (ECM) Identified.
  • Verified and obtained electrical consumption data from Hawaiian Electric Company, Inc. (HECO) on all HECO installed and other meters for state facility buildings.  Determined the total state facility Oahu energy usage and load profiles for major accounts, and for each building that has been metered.
  • Met with representatives from each agency to collect information to support the benchmark analysis, including an inventory listing each agency’s buildings, along with a description of use and floor area; survey and copy of any reports from previously conducted energy studies or audits; and a listing of any other recent upgrades or recommendations to their facilities.
  • Conducted a two-day field survey of the existing sites to observe conditions and the condition of buildings that were previously assessed during the audit.

We performed the analyses of data, as follows:

  • Developed a spreadsheet for all buildings that were previously surveyed/audited and metered that summarizes the energy consumption, square footage, electric EUUI operating costs, and the energy savings, costs, and payback for each previously developed ECM.
  • Extrapolated the data for previously metered and surveyed/audited buildings to the remaining State facilities on Oahu using engineering judgment and the information collected.  Developed a separate spreadsheet for these buildings, including projected information on the energy consumption, square footage, EUI, and energy savings, cost and simple payback for possible ECMs.
  • Developed spreadsheets, which organize the buildings by agency, EUIs, age, square footage, operating costs, energy savings potential, ECM costs, and payback.  Summarized the current energy consumption levels of each building, and identify and prioritize the buildings that have the largest potential for energy savings.
  • Developed a spreadsheet which lists potential candidates for energy performance contracting.

We then prepared and provided to the State a technical report summarizing the findings and recommendations of the study.


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