This webinar explores different ways of optimizing district heating systems at the building level.

The webinar starts off with a presentation of innovative solutions for the building as a whole, including different ways to optimise the substations so they provide the best temperature into the building in order to maximize cost savings and energy efficiency. Based on a master thesis, recommendations for regulating radiator temperature in multi-family homes are presented to the audience.

 

1. Smart Energy Management: Online interactive actual energy consumption map of Vilnius buildings

Dr. Romanas Savickas, Head of Engineers Analysis Group at Veolia Energy branch in Lithuania
Power point presentation by Romanas Savickas / Short cut to the video recording

There are several ways to classify energy performance for buildings. However, they all have significant drawbacks, if we want to be able to compare different buildings or areas within cities. As an example, energy audits give detailed information but require too much labour. Veolia have developed a classification where various influencing factors are eliminated: The Interactive Actual Energy Consumption Class (AECC). With this value calculation of the heat required to increase 1 m2 of the premise’s temperature by 1 °C per day is possible.

This presentation introduces the AECC and describes how it can be used to rank buildings, then classifying a building stock distribution. An AECC map can be assembled, showing where in the city the buildings are the most energy efficient. The saying “You cannot manage what you cannot measure” can be turned into “You can manage what you can measure, for instance using AECC”.

Question from the audience:

  • Can this AECC map be replicated in other cities, and if so, what would be your recommendation for that?

2. Substation Optimisation

Patrik Arvsell, Project Manager CELSIUS at Göteborg Energi
Power point presentation by Partik Arvsell / Short cut to the video recording

This presentation focuses on several practical aspects and problems at the building level. For instance, radiator covers cause problems since they impede the heat transport, and the thermostat will not work properly. Heat analysis using thermography, is one way ahead. Also, there are three types of tariffs. The return tariff in which the building owner is charged less if the return temperature is high, motivates the building owner to make the building more energy efficient. The reasons why an energy company should want to help save energy is discussed.

Questions from the audience:

  • Is your system a one-way or two-way system, i.e. can you also both send and receive data?
  • How can the end-user compensate for the radiator cover?

3. Radiator Temperatures in Buildings Supplied by District Heating

Maria Jangsten, consultant at Chalmers Teknologkonsulter
Power point presentation by Maria Jangsten / Short cut to the video recording

Several changes are expected in the DH network in the next years. In the future, we will use low temperature district heating. As a step towards that, the study described had the goal to determine actual temperatures in the users’ radiators.

 

Date of webinar

October 2016

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