Energy Edge Solutions

St. Francis


Medical Center Case Study

Founded in 1897. 682 beds. Campus setting with multiple buildings. Largest Catholic hospital n New England

Business Situation

Like all hospitals, St. Francis runs 24 hours a day, 7 days a week. The loads include central chiller plants, roof top HVAC units, numerous air handling units, boilers, office and medical equipment, pumps, heaters, refrigeration loads, restaurant equipment, vending machines, washers and dryers, etc. The lighting system was comprised primarily of T-12 and HPS fixtures. The hospital’s energy costs were rising at an alarming rate and needed to be controlled.

Process

As a first step Energy Edge Solutions (EES) conducted a comprehensive whole building investment-grade energy audit and engineering study of all buildings on the campus. The audit included an intense review of the following areas:

Utility Bills: EES reviewed the previous 12 months of utility data for the facility.

Designs: EES reviewed all available electrical one line and mechanical drawings.

Facility Energy Behavior: EES reviewed with the customer the current energy behavior of the staff including temperature set points, setting back temperatures when the facility is closed, turning off lights, office equipment, etc. after hours.

Building Envelope: EES checked weather stripping, insulation, open doors and areas around frequently trafficked areas, etc.

Lighting Systems: EES reviewed the current lighting systems to determine if the most efficient lighting options were being used and if occupancy sensors, timers and dimmers had been placed into operation. EES also looked for areas that were over lit and areas that could take advantage of natural sunlight.

Heating, Ventilation and Cooling Systems: EES looked at the HVAC/R systems to determine operating efficiency, maintenance schedules, filter replacement frequency, age, and upgrade and treatment options.

Motors and Equipment: EES itemized all electrical loads across the facility (including HVAC, production and refrigeration equipment) and their respective run times. Actual electrical measurements such as amperage, voltage, THD%, power factor, etc were taken at all loads as well as at the main. Load, duty cycles, operating efficiency, age, replacement and treatment options, etc. were all determined.

Solution

Energy Energy Edge Solutions (EES) recommended a whole facility approach to energy cost reduction including all available energy conservation opportunities to significantly reduce the center’s expenses. EES also showed the customer how each different option would impact energy consumption as well as the project cost and return on investment. Based on EETC’s analysis and the hospital’s selection of available options, St. Francis was guaranteed a minimum kWh reduction of 10.43%. The maximum guaranteed project payback was 36 months. EES takes complete responsibility for all turnkey installations including the procurement of all equipment, labor, project management, pre- and post- inspections, waste removal, recycling, certifications, permits, administrative rebate work, etc.

Benefits

EETC measures the success of all projects in accord with the International Performance Measurement and Verification Protocol, Option C (www.IPMVP.org) as approved by the U.S. Department of Energy. EES compiles a statistical measurement and verification report quarterly for customers which includes utility bill analysis, base and verification period comparison, building simulation/ modeling, inclusion of all factors of influence, statistical correlation, regression analysis, etc. The turnkey project is currently saving 11.63% and paid back in less than 29 months, providing St. Francis with a 41% return on investment.

Products and Services Recommended and/or Employed

  • Lighting retrofit using T-8 fixtures and CFL
  • Energy management system for air conditioning and lighting loads
  • Sine wave modification
  • Anti-compressor short cycling for heating systems
  • Anti-compressor short cycling for cooling systems
  • Recommended changes in staff energy behavior
  • Liquid pressure amplification for chiller systems
  • Vend misers for vending machines
  • Variable frequency drives for compressor and fan loads
  • Thermal qualities simulation for refrigeration
  • Occupancy sensors for offices and conference rooms
  • Outside lighting controls

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