ISO 50015 PDF

Many enterprises put a lot of focus on maintaining their energy management system EnMS in accordance with ISO , by reducing energy consumption and increasing energy efficiency. Companies who have already introduced an EnMS are mostly aware that a decrease of the total energy consumption is not explicitly the objective of the standard, but rather a continuous increase of efficiency by means of informative key energy figures. A system of well thought out key indicators that transparently maps out the energy related performance of the company is seldom implemented. Within the scope of support during the implementation of the elements of both standards, we offer, inter alia, the following services:. It is recommended to link the application of both standards. The advantages are clear: Through the linkage of various data, a detailed view of the current efficiency, for instance in production, can be seen in real time, by generating diverse sectoral key figures.

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The measurement of lam A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution ISO All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission.

ISO copyright office Case postale 56? CH Geneva 20 Tel. A informative Overview of the measurement and verification flow B informative Measurement uncertainty examples The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee.

International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. In particular the different approval criteria needed for the different types of ISO documents should be noted.? Directives, Part?

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.?

Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. Credible results can contribute to the pursuit of energy performance improvement. This International Standard can be used irrespective of the type of energy used.

This International Standard can be used in several organizational contexts: — for all or part of an organization. The principles and guidance in this International Standard can be used independently or in conjunction with other standards and protocols. This International Standard can be used independently, or in conjunction with other standards or protocols, and can be applied to all types of energy.

Use for comparing energy performance and the calculation of the energy performance 3. For the purposes of this International Standard, energy refers to the various forms of energy, including renewable, which can be purchased, stored, treated, used in equipment or in a process, or recovered.

Energy can be defined as the capacity of a system to produce external activity or perform work. An energy baseline reflects a specified period of time. An energy baseline can be normalized for relevant variables 3. The energy baseline is also used for calculation of energy savings, as a reference before and after implementation of energy performance improvement actions 3.

Energy performance is one component of the performance of the energy management system. EnPIs 3. Non-routine adjustments may apply where the energy baseline no longer reflects current energy use 3.

An organization can be a person or a group of people. Significance criteria are determined by the organization 3. Principles are not requirements rather, these principles should guide decisions made in both planned and unanticipated situations. The following principles described in detail in 4. A clear statement regarding the accuracy of results and steps taken to mitigate uncertainty should be included in the reported results.

NOTE When the data are confidential, transparency can be limited for some interested parties. Data management includes but is not limited to the means to store, backup, maintain and secure the data.

These issues need to be included in the documentation. BS ISO 4. Impartiality does not require third party independence.

Data-gathering see 6. Verify the implementation of EPIA s if any see 6. Review the need to repeat the process, as necessary see 6. The sequence of these six basic steps is illustrated in Figure? BS ISO 5. However, consequential effects need to be considered when determining which elements are not affected by the EPIA or energy performance. Energy performance metrics defined by the organization are termed EnPIs see 3. Characterization of energy performance metrics based on ratios or more complex models should include the mathematical equation s or specific steps to determine the energy performance metric.

EXAMPLE 2 Ratio-based energy performance metrics include specific monthly energy consumption calculated as total monthly energy consumption in kWh divided by total monthly production in tonnes. The additional energy performance metrics may or may not be adopted as EnPI s. For each data element needed, the following should be described: — name of variable; — data source, existing or new; — data quality; NOTE 1 The description will typically include the type of data source i.

NOTE 2 Data quality can include the appropriateness, accuracy, validation, reliability, completeness, etc. In cases where calibration information is not available, the potential impact will be described in the context of uncertainty see Clause? The frequency of data collection needs to be sufficient to capture the range of operating conditions.

Weather conditions can be obtained from a number of means, including: a directly from degree day database or the nearest reliable weather measurement point , c computed from a local temperature meter existing or not. This section should also specify how data should be recorded and maintained. The plan should provide contingency for data loss or data backup. In such cases, there may be differences between the data—gathering plan during the baseline period and the data—gathering plan during the reporting period, in which case, two separate data—gathering plans one for each period should be documented.

The description of the data-gathering plan should be comprehensive enough to ensure the process of obtaining the data can be both repeatable and reproducible. Data used to establish the energy baseline should be gathered according to the guidance in data-gathering plan see 5.

The energy baseline should be established prior to the implementation of any EPIA s if practicable. There should be appropriate records supporting the reasons for decisions made in order to establish an audit trail. This may include recording electronic correspondence between relevant parties. Any non-routine adjustments or changes to methods used should be recorded. The outcome of this step is measured and verified energy performance results. Savings from the combustion efficiency improvement alone could be determined based on the efficiency changes at the initial insulation level.

Savings from the insulation improvement alone could be determined based on the insulation difference at the initial efficiency level. The combined effect is determined based on the difference between the initial state and the consumption at both the improved efficiency and improved insulation level.

Reports may be a single annual report, ongoing quarterly reports, monthly reports, etc. Reports should summarize the scope and purpose see 5. In order to provide confidence in the results, reports should include a clear statement regarding the accuracy or uncertainty of measurement.

This includes changes to relevant variables as well as changes to static factors. These challenges may include: NOTE 2 Operational changes might have occurred making it difficult to compare the energy baseline and reporting periods under constant conditions significant changes might include changes in operating shifts, significant changes in production volume or mix, introduction of feedstock, etc.

For example, if the scope is outlined in the first monthly report, repetition the following month might not be required. Where engineering calculations or simulations are used, uncertainty can be described based on the methods employed, using common rules from handbooks or through sensitivity analysis. Examples of measurement uncertainty are given in Annex? Overview of the measurement and verification flow Annex?

A informative Figure? BS ISO Measurement uncertainty examples The analysis of uncertainties associated with data, methods and models used to identify and analyse energy performance improvement results plays an important part in their application.

Uncertainty analysis involves the determination of the variation or imprecision in the results, resulting from the collective variation in the parameters and assumptions used to define the results. B informative An area closely related to uncertainty analysis is sensitivity analysis. Sensitivity analysis involves the determination of the size and significance of the magnitude of results to changes in individual input parameters.

It is used to identify those data which need to be accurate, and those which are less sensitive and hence have less effect upon overall accuracy. Assume you need to measure the amount of water leaking from a tap during a 24h period. You do not have a calibrated volumetric container at hand. As an alternative, you decide to use a 1l, glass soft drink bottle. You know the bottle might not be calibrated to the nearest 15ml.

You also know that the glass bottle cannot expand or contract significantly enough to influence the volume of the bottle by more than 5ml, otherwise it would break. You decide that you will fill the bottle to the point where it overflows before you consider it to contain 1l. In this case, the result could be stated as an accurate lower bound e. There are three timepieces as follows: Three individuals will watch a short video clip; they must determine the start and stop times on their own.

After the video has finished, the result of timepiece A is 33 s, of timepiece B is 28,5 s and of timepiece C is 30,03 s. There is a total range of 4,5 s error. The video played for 30 s, so there is variation inherent in the timepieces and the personnel using them. The error of 4,5 s might contribute little to the reporting results, given that the video clip is used as a safety video for the organization, and timing is not so important; however, if the video clip were an actual television commercial, this could be considered excessive variation and might be costly.

The intent is to show that the same variation might be acceptable for the application and needs of the user, while others might not.

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