DIGITALISATION OF THE DANISH DISTRICT HEATING SECTOR
CASE CATALOGUE 2023
“AS A DISTRICT HEATING COMPANY, HOFOR CONSIDERS DISTRICT HEATING FLEXUMERS AS AN IMPORTANT STEP TOWARDS REDU CING PEAK-LOAD PRODUCTION AND CREATING ACCESS TO MORE RENEWABLES-BASED HEAT GENERATORS.”
KRISTIAN HONORÉ, ENERGY PLANNER, HOFOR
The graphs show how the peak load period is moved by heating the building before the peak load occurs.
AVERAGE DAILY POWER PROFILES, LOAD SHIFTING ON AND OFF
Load shisting OFF 2021
Load shisting ON 2022
Change compared to last year, %
HOFOR District Heating Flexumers in Copenhagen CASE 3
Hourofthedayweekdaysonly
HOURLY AVERAGE POWER, ALL
Power, Pre LH (from 2021-1-1 until 2021-5-3)
Power, Pre LH (from 2022-2-24)
Challenge Together with HOFOR and Københavns Ejendomme og Indkøb (KEID), Danfoss is exploring the potential for optimis- ing the CO 2 -neutral baseload production in Copenhagen by utilising AI-based heat control from its Leonheat AI system. The first part of the demonstration took place in the 2021- 2022 heating season and covered 29 municipal buildings (primarily day-care centres and schools). The primary objective of the demonstration is to reduce the peak heat consumption in the mornings (from 6 am to 10 am) by making consumption more flexible.
Results The initial results of the project show that the average morn- ing peak load fell by 14 percent at building level, and at the end of the second part of the demonstration in the upcoming heating season, it is expected to be able to determine what this means at system level. The connected buildings also slightly reduced their heat energy consumption because of compensation from solar energy forecast by the Leanheat AI. Based on the overall results of the demonstration, it will be possible to quantify the overall financial and environmental benefits. Looking at the total heating consumption on an hourly basis as an average per building, the peak output fell from 27.5 kW/ building to 21.5 kW/building (-22 percent). The calculation was made by comparing the highest peak during peak load displacement with the highest measured peak last year under the same outdoor conditions. Any obvi- ous outliers were ignored in the analysis.
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Peak power before Leanheat: 27,5 kW/building
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Peak power in Leanheat control: 21,5 kW/building
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Therefore, the project has been called District Heating Flexumers.
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Outdoor temperature (ºC)
Solution The Danfoss Leanheat AI learns how the buildings behave and utilises the thermal flexibility of buildings (the ability to store heat in the building stock over a period) to reduce peak loads. During the morning peak period, the Leanheat AI diverts the heat stored in the buildings by reducing the heat input by up to 20 percent, whereupon it is recharged before the next morning.
INFORMATION
Meters Address Email Phone
Company Solution Providers Employees Heat
35.000 Ørestads Boulevard 35, 2300 København S
HOFOR Danfoss Leonheat 1.500 4.400 GWh
hofor@hofor.dk +45 33 95 33 95
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