Sean Weber Energy Engineer

Example Electric Bill (High Previous Demand -100) * 0.6 = Minimum Billing Demand

Example Electric Bill (High Previous Demand -100) * 0.6 = Minimum Billing Demand

Example Electric Bill (High Previous Demand -100) * 0.6 = Minimum Billing Demand

Electric Tariffs – Provided by Utility Company (High Previous Demand -100) * 0.6 = Minimum Billing Demand

Example Electric Bill Minimum Billed Demand (582.3-100) x 0.6 = 289.38 kW (655.8-100) x 0.6 =333.5 kW (High Previous Demand -100) * 0.6 = Minimum Billing Demand

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PJM – RTO Regional Tranmission Organization 9

Utility Benchmarking Benchmarking is the practice of comparing the measured performance of a facility to itself and its peers Energy Use Intensity (EUI) EUI =((Total kWh x 3.412 kBtu/kWh) + (Total mmBtus of Gas x 1000 kBtu/mmBtu)) Total Gross Square Footage Total Utility Cost Intensity (TCI) TCI = 12 Months Total Utility Cost (Gas and Electric) Total Gross Square Footage Can Normalize the bills to weather using HDD and CDD

Where to Start? – Create a Systems Operation Map Document the following items for each area type; Occupancy Schedules Served by what HVAC system (AHU, Chiller, Boiler, Etc.) Lighting and HVAC Schedules and methods of control Occupied Setpoints and Unoccupied Setpoints Terminal Unit Heaters in space Other large energy users (EFs, Air Compressors, Etc.) Can Normalize the bills to weather using HDD and CDD

No Cost/Low Cost Energy Savings Opportunities Energy Savings Opportunities from Systems Operation Map Tighten HVAC and Lighting Schedules so they match Occupancy Schedules Adjust Occupied and Unoccupied Setpoints Ensure at least Two degree deadband between Cooling and Heating Setpoints Adjust Terminal Unit Heater Setpoints Turn off Terminal Unit Heaters in cooling season Tie Exhaust Fan Schedules to HVAC schedules Fix leaks in Air Compressor lines Lower Air Compressor Setpoint if possible Can Normalize the bills to weather using HDD and CDD

Other Low Cost Energy Savings Opportunities Encourage Occupants to shutoff computer monitors and Lights Remove Incandescent Light Bulbs and replace with LEDs Replace Exit Lights with LEDs Close Gaps Around Doors and Windows Optimize Janitorial Staff so fewer lights are on Effective Preventative Maintenance Plan Can Normalize the bills to weather using HDD and CDD

What to do Next? Investigate the Building Automation and Controls Systems Does the system simultaneous heat and cool often? Are outside air dampers properly sealing? Are economizers functioning optimally? Are you bringing in more outside air than required? Is there Senor Error? Have Pneumatics been calibrated? Has the systems sequence of operations been adjusted as spaces have changed? Mention Handout regarding

Retro-Commissioning and Fine-Tuning process to improve the efficiency of an existing building’s equipment and systems. It can often resolve problems that have developed throughout the building’s life as equipment has aged, and building usage has changed. Retro-commissioning is a process to improve the efficiency of an existing building’s equipment and systems. It can often resolve problems that occurred during design or construction, or address problems that have developed throughout the building’s life as equipment has aged, or as building usage has changed.  Why is retro-commissioning important? Commercial buildings frequently undergo operational and occupancy changes that challenge the mechanical, electrical and control systems, hindering optimal performance. In today’s complex buildings, systems are highly interactive, with sophisticated controls that can create a trickle-down effect on building operations – small problems have big effects on performance.1   All buildings can experience performance degradation over time.

Retro-Commissioning and Fine-Tuning Retro-commissioning is a process to improve the efficiency of an existing building’s equipment and systems. It can often resolve problems that occurred during design or construction, or address problems that have developed throughout the building’s life as equipment has aged, or as building usage has changed.  Why is retro-commissioning important? Commercial buildings frequently undergo operational and occupancy changes that challenge the mechanical, electrical and control systems, hindering optimal performance. In today’s complex buildings, systems are highly interactive, with sophisticated controls that can create a trickle-down effect on building operations – small problems have big effects on performance.1   All buildings can experience performance degradation over time.

Capital Investments for Energy Efficiency Building wide Interior and Exterior LED lighting Upgrades BAS upgrade and or replacement Fundamental system design changes Aging boiler and chiller replacements with energy efficient options Retro-commissioning is a process to improve the efficiency of an existing building’s equipment and systems. It can often resolve problems that occurred during design or construction, or address problems that have developed throughout the building’s life as equipment has aged, or as building usage has changed.  Why is retro-commissioning important? Commercial buildings frequently undergo operational and occupancy changes that challenge the mechanical, electrical and control systems, hindering optimal performance. In today’s complex buildings, systems are highly interactive, with sophisticated controls that can create a trickle-down effect on building operations – small problems have big effects on performance.1   All buildings can experience performance degradation over time.

It Never Ends! Retro-commissioning is a process to improve the efficiency of an existing building’s equipment and systems. It can often resolve problems that occurred during design or construction, or address problems that have developed throughout the building’s life as equipment has aged, or as building usage has changed.  Why is retro-commissioning important? Commercial buildings frequently undergo operational and occupancy changes that challenge the mechanical, electrical and control systems, hindering optimal performance. In today’s complex buildings, systems are highly interactive, with sophisticated controls that can create a trickle-down effect on building operations – small problems have big effects on performance.1   All buildings can experience performance degradation over time.