Thermal energy meters with short integration times

Research shows that a faster energy measurement gives a better picture of the power requirement. This makes it possible to control the delivery of heat better and to reduce the use of facilities for top load, which contributes to achieving current environmental and climate goals.

The purpose with the project has been to obtain better knowledge about the meters and how accurate they can measure, as well as to find out what requirements are suitable for future thermal energy meters, also called fast response meters. This is important in a future with a higher proportion of volatile domestic hot water use at many customers, but also at introduction of battery powered meters where operating time is dependent on the measuring frequency.How often a thermal energy meter calculates the amount of delivered energy affects the measurement results during varying flow of domestic hot water. In the lab measurements performed, the slower energy meter type measured about 1 % lower flow than the faster counterparts.

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