Energy Efficiency

ASWB follows a systematic implementation approach to energy efficiency, from initial building audit to measure implementation. This approach consists of five phases:

1. Screening Audit

  • Review the facility’s historic energy bills
  • Visit the facility (if possible) to identify probable energy efficiency measures (EEMs)
  • Based on the results of the screening audit, management and ASWB will determine which EEMs should be evaluated in the preliminary energy assessment (PEA) report
  • Develop proposal for management’s approval

2. Preliminary Energy Assessment (PEA)

  • Perform a PEA to collect the necessary information to identify the cost–benefits of the identified EEMs
    • window tinting
    • insulation
    • lighting
    • central cooling and heating plants
    • replacement of electric-strip heaters
    • conversion of air systems from constant to variable-air volume
    • economizer cycle or indirect crossover cooling
    • etc.
  • Perform a high-level cost–benefit analysis of the identified EEMs
  • Develop a report for management’s review and approval
  • Present the final report to management

3. In-depth Feasibility Study

Once the preliminary cost–benefits are established, management might need or desire to have an in-depth feasibility study completed on one or several EEMs to tune the preliminary economic results obtained in the PEA phase.

  • Meet with management to select the EEMs that will be re-evaluated by performing an in-depth feasibility study
  • Re-audit the facility to collect additional field data to perform systems’ energy simulations and identify in detail the EEMs’ implementation logistics
  • Perform system energy simulation — baseline and system-option(s).
  • Establish monthly “representative day” kW profiles of the base system and system-options and perform rate analyses
  • Establish implementation costs using equipment and installation costs
  • Develop a report for management’s review and approval
  • Present the final report to management

4. Design–Build Criteria

  • Re-visit the facility to firm up the implementation logistics of each of the selected EEMs for implementation
  • Develop design–build criteria for each of the selected EEMs
  • Acquire contractors’ bid and select contractor(s)
  • Perform site inspections during the implementation of the EEMs
  • Perform acceptance tests

5. Measurement & Verification (M&V)

  • Develop and present M&V plan for management’s approval
  • Install temporary field instrumentation to identify energy usage pre- and post-retrofits
  • Establish systems’ energy baselines prior to the implementation of the selected EEMs
  • Analyze and compare pre- and post-retrofit data to establish actual energy savings
  • Report on energy saving findings