BASIS OF ENERGY ENGINEERING. Forecasted energy savings are the difference between the pre- and post-retrofit period consumption for the equipment included in the scope of Work. The pre-retrofit (or Baseline) data for this project covers the period from May 2021 through April 2022. The Baseline data takes into consideration the quantity of facilities and size; 2021/2022 building operational schedules; 2021/2022 School Calendar and 2021/2022 individual school Bell Schedules; occupancy factors and utilization; utility usage, costs and published current effective utility rates along with the available average ASHRAE weather files for the closest weather station. Except weather files, this data has been obtained from the District. Since Contractor does not control/follow the building operations on a day-by-day basis, it is virtually impossible to track the energy consumption and savings from utility bills due to many dynamic factors that are out of Contractor’s control. These factors (permanent or temporary) include, but are not limited to: weather changes; changes in the use of any facility and number of occupants (including, but not limited to, staff, faculty and students); changes to the hours of operation of any facility; changes to the control system scheduling; changes or modifications to the equipment or services provided under this Agreement; changes in utility suppliers, method of utility billing, number of days in the billing cycle, utility rates or method of utility purchasing; improper maintenance of the equipment or of any energy-consuming equipment; changes to the equipment or to any facility required by changes to building codes; additions or deletions of energy-consuming equipment; personal portable heaters; refrigerators and vending machines and/or additions or deletions of any facilities (i.e. portable classroom buildings), etc. Therefore, engineering calculations approach is based on a measure-by-measure (ECM-by-ECM) basis and is to be derived by comparing the specific value of physical parameters after the installation to its value prior to the installations. For example: lighting systems retrofit (see below) will result in lower wattage consumption than Baseline scenario. This measure is not affected by weather changes, HVAC or other unrelated equipment energy consumption that are reflected in the utility bills. Below are some key characteristics and features of the measure-by-measure energy saving calculations method: • It calculates savings based on District inputs, ...
BASIS OF ENERGY ENGINEERING. Forecasted energy savings are the difference between the pre- and post-retrofit period consumption for the equipment included in the scope of Work. The pre-retrofit (or Baseline) data for this project covers the period from June 2018 through July 2019. The Baseline data takes into consideration the quantity of facilities and size; 2018/2019 building operational schedules; occupancy factors and utilization; utility usage, costs and utility rates along with the available average ASHRAE weather files for the closest weather station. Except weather files, this data has been obtained from the County. Since Contractor does not control/follow the building operations on a day-by-day basis, it is virtually impossible to track the energy consumption and savings from utility bills due to many dynamic factors that are out of the Contractor’s control. These factors (permanent or temporary) include, but are not limited to: weather changes; changes in the use of any facility and number of occupants (including, but not limited to, staff); changes to the hours of operation of any facility; changes to the control system scheduling; changes or modifications to the equipment or services provided under this Agreement; changes in utility suppliers, method of utility billing, number of days in the billing cycle, utility rates or method of utility purchasing; improper maintenance of the equipment or of any energy-consuming equipment; changes to the equipment or to any facility required by changes to building codes; additions or deletions of energy-consuming equipment; personal portable heaters; refrigerators and vending machines and/or additions or deletions of any facilities, etc. Therefore, engineering calculations approach is based on a measure-by-measure (ECM-by-ECM) basis and is to be derived by comparing the specific value of physical parameters after the installation to its value prior to the installations. For example: lighting systems retrofit (see below) will result in lower wattage consumption than Baseline scenario. This measure is not affected by weather changes, HVAC or other unrelated equipment energy consumption that are reflected in the utility bills. Below are some key characteristics and features of the measure-by-measure energy saving calculations method: • It calculates savings based on County inputs, field measurements, and agreed upon assumptions and stipulations. • It does not involve utility bill comparisons; however, utility bills may be analyzed to iden...
