In Step 1.6 you developed the site specific scope and boundaries required by SEP. The energy sources that are identified as crossing the SEP boundary are used to determine energy consumption and energy performance. In addition to identifying energy sources for the energy review of ISO 50001 Section 4.4.3, you are also required to identify energy uses (see Step 2.2 in Level 2). ANSI/MSE 50021 and the SEP Measurement & Verification Protocol (M&V Protocol) specify additional requirements for both the energy sources and energy uses identified in the energy review of ISO 50001.
How to do it
The following actions will help you identify energy sources and uses:
For ISO 50001 you identified your current energy sources. For SEP, convert each of these to source energy. This task relates to and builds upon task 2.2.1 in Level 2 ISO 50001 Energy Management.
2.2.4 Maintain energy use list accounting for majority of energy consumption
Take the energy uses you identified in Level 2 and organize them into a list. Make sure this list identifies the energy uses that represent the majority (e.g. approximately 90%) of your organization’s energy consumption. This task relates to and builds upon task 2.2.2 in Level 2 ISO 50001 Energy Management.
2.2.5 Ensure that special cases are accounted for properly
Special cases such as derived energy sources, pass through sources, feedstocks and fuels maintained in inventory are accounted for as described by the SEP M&V Protocol. Ensure the consumption of the all the energy sources consumed on your site account for these special cases. This task relates to and builds upon task 2.2.1 in Level 2 ISO 50001 Energy Management.
SEP requirements related to energy sources and uses are found in these SEP resources:
ANSI/MSE 50021
Section 4.4.3 requires you to maintain a list of facilities, equipment, systems and processes that account for the majority of your organization’s energy consumption. This list of facilities, equipment, systems and processes is commonly referred to as “energy uses”. (The terms energy consumption and energy use are defined in ISO 50001, definitions 3.7 and 3.18 respectively.) You can arrange this list of energy uses in any fashion suitable to your organization’s needs.
There is no established value that constitutes “a majority”, however, energy management best practice suggests you identify energy uses that account for 90% of your organization’s energy consumption.
SEP M&V Protocol
Section 3.3 defines how to identify what are the appropriate energy sources and how the data will be gathered for each source. All site level energy data must be converted to the appropriate source energy value. For example, purchased electricity must be multiplied by 3 to account for the energy required to generate and transmit the electricity to your facility. You must demonstrate that your energy source data utilized in the SEnPI model accounts for 95% of the total source energy that crosses the SEP boundary.
Sections 3.7 and 3.8 describe how to handle special cases associated with derived energy sources, feed stocks and other circumstances such as renewables and energy from byproducts. Examples of derived sources include energy in the form of purchased steam, compressed air or chilled water. The specific data requirements for energy sources and uses will be covered in Step 2.3.
