The first steps to digitizing energy efficiency have been taken in consumption monitoring. Their implementation has been easy and every engineer naturally loves measurement. It was also easy for customers to buy spectacular trends and pies to control rooms. In this text, we are tackling what they are producing to us when the goal is to save energy.

Reading energy bill directly from energy companies and reporting on consumption has helped to increase understanding. From the heat energy trends can be deduced the correlation with outdoor temperature etc. as well as electricity consumption following use, etc. How can be deduced by results the means to get energy savings?

Generally recommended that more accurate measurements are required to find savings. Measuring electrical consumption of group centers and rises are easy. They are mostly mixed centers, so they do not tell whether it is a consumption change in the lights, FAHU machines or anything else in them. Measuring the heat consumption of each radiator, FCU and FAHU or even industrial equipment seems to be economically impossible. Heat energy is shown to be evaluated by models and calculations. After all, what should we measure?

Consumption data for individual devices or groups of devices is already much more telling. They see a change due to consumption and possible breakages or long-term wear and tear. Measuring often serves the needs of maintenance well but finding energy savings poorly.

In order to avoid partial optimization, the reduction of the balance of the energy balance requires, according to the instructions, the examination of all energy fractions. Only then can real savings be achieved without undoing each other. The energy balance has a significant role in secondary heat, heat leaks in buildings and the effects of solar radiation. Measuring them is practically impossible.

For reliable results, all effective fractions should be identified. It can also be done according to energy efficiency guides, for example by calculating or comparing comparisons. What measurements are needed then?

Measurements are needed to adjust processes, access to consumption data from hardly predictable consumption objects and of course billing. They can also be used as a means of verifying the change. But how do measurements bring a solution to energy efficiency?

Energy efficiency is achieved by experts’ experience by constantly doing the right things. The assessment of the right measures requires the determination of the consumption of energy fractions and their impact. The estimates shall also include the technical, technical and environmental information of the equipment and structures affecting them. These energy stream currents form an energy balance model that explains how the changes affect the energy balance.

Will the benefits of digitality come from the automation of these functions?

/Tommi Impivaara

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