ISO 50006-2014 pdf free download.Energy management systems一 Measuring energy performance using energy baselines (EnB) and energy performance indicators (EnPI)一 General principles and guidance.
4 Measurement of energy performance
4.1 General overview
4.1.1 General In order to ffctively measure and quantify its energy performance, an organization establishes EnPls and EnBs. EnPls are used to quantify the energy performance of the whole organization or its various parts. EnBs are quantitative references used to compare EnPI values over time and to quantify changes in energy performance. Energy performance results can be expressed in units of comsumption (e.g. G. kWh]. specific energy consumption (SEC) (eg kWh/untt). peak power (eg. kW), percent change in efcency or dimensionless ratios, etc. The general relationship between energy performance, EnPls, EnBs and energy targets is ilustrated in Figure 1 in the introduction. Energy performance can be ffcted by a number of relevant variables and static factors. These can be linked to changing business conditons such as market demand, sales and proftability. An overview of the process to develop, use and update EnPls and EnBs is ilustrated in Figure 2 and described in detail in 4.2 to 4.6. This process helps the organization to continually improve the measurement of its energy performance.
4.1.2 Energy consumption Quntifyingenergy consumption is esentialfor measuring energy performance and energyperformance improvements. When multiple forms of energy are used, it is useful to convert all forms to a common unit of measure of energy. Care should be taken to perform the conversion in a manner that approprlately represents total energy consumed including losses in the energy conversion process.
4.1.3 Energy use ldentifying energy uses such as energy systems (eg compressed air, steam, chilled water, etc]. processes and equipment helps to categorize energy consumption and to focus energy performance on uses that are important to an organization.
4.1.4 Energy eficency Energy fficiency is a frequently used metric for measuring energy performance and may be used as an EnPl. Energy fficlency can be expressed in a number of ways, such as energy output/energy input (conversion efficiency): energy required/energy consumed (where energy required may be derived froma theoretical model or some other relationship); production output/energy input (for example the tons of production per unit energy consumed). ISO 50006 pdf download.