Evaluation of energy performance

What is that about?

Energy diagnosis or energy audit is a systematic, documented and periodic evaluation of the efficiency of the organization of the energy performance management system.

It is the key component of an energy efficiency program because it is the basis of the models, parameters and dynamics that are useful for evaluating it.

The energy diagnosis aims to reveal how energy is used, what are the causes of any waste and what interventions can be suggested to the user through an energy plan that evaluates not only technical feasibility but also And especially the economic one of the proposed actions.

The energetic diagnosis is therefore a systematic system of important data collection, collection, analysis and analysis of specific energy consumption and operating conditions (simple or complex): in summary, a “technical and economic evaluation of energy flows “.

What are the goals of the energy performance assessment:

  • Define the energy balance and the underlying management model
  • Elaborate the collected data and determine, with known and defined approximation degree, the energy costs of management quantities (areas, processes, products / services etc), which are energetically considered significant
  • Identify and evaluate possible management / behavioral and technological / structural interventions
  • Improve comfort and safety
  • Reduce energy management costs

Improvement samples:

The interventions can be classified as follows:

  • Modify energy supply contracts (as appropriate and if necessary)
  • Modification of business processes and / or procedures
  • Training on energetically “virtuous” behaviors
  • Modifications to plant management, including modulation of loads
  • Modifications to existing dispersing structures
  • Changes to existing installations
  • New plants
  • Planning of maintenance interventions

What really happens?

This is an in-depth analysis conducted through site inspections and the examination of documents provided by the company. Consumption data and energy costs, as well as data on electrical, thermal, refrigeration, water (power, time / consumption, usage factor, work hours, etc.) are collected.


On this basis and on the identification of management quantities, the energy model is reconstructed. A management control model specifically designed to frame energy cost behavior. In the model, it is possible to derive the distribution of power and consumption by type of use (lighting, air conditioning, process and compression air, compressed air, other services, process areas, etc.) by cost center, process, product , Per cabin and per ward, per hourly and seasonal. Ultimately, it will “cost” each “management object” deemed significant for energy performance.

The energy situation, thus framed, is critically analyzed and compared to average consumption parameters (eg relative to the same sector or to companies of size and / or consumption level similar to the one in question) in order to identify improvement interventions for The reduction of consumption and costs, accompanied by preliminary technical-economic feasibility assessment.