P12
MEASURED HEAT LABELLING SYSTEM OF BUILDINGS FOR BETTER DESIGN AND OPERATION A heat labelling system based on measured heat consumption and heat profiles of existing buildings has been developed as an alternative to the existing heat labelling system. The proposed evaluation method deviates radically from the theoretical calculation of the mandatory energy labelling system and focused on the four below mentioned parameters: 1. The building`s unit consumption in kWh/m2 per year, and the development from previous years 2. The return temperature from the building`s heating central on a summer and winter day respectively 3. The building`s physical condition (insulation conditions), and the condition of the technical installations (system solutions) 4. The building`s heat profile and capacity demand during peak load hours (~06-09.00, and ~17-20.00) on a summer and winter day respectively Preliminary results indicate that there is a +10 % energy saving potential in better design and operation of the installed DH substations. This is also of significant importance for the operation of the DH network and thereby the overall business of the utility company. Fig. 4 shows an example of the developed heat label providing new and valuable input for better design and operation of buildings and their district heating substations.
Other interesting and innovative DH demonstrations in the EnergyLab Nordhavn project are:
- A flexible heat pump system supplying DH to four large buildings outside the central DH network - Fuel shift operation of a domestic hot water tank – in up to 10 row houses, where the tank can be heated by either DH or electricity depending on i.e. energy prices and/or CO2- content - Heat pump booster for domestic hot water in combination with ultra-low temperature DH (<45 o C) in one of the new floor-heated, multi-family buildings - Heat pump for DH return temperature optimization while maintaining a stable temperature of the domestic hot water circulation - Integration of excess heat from a local supermarket in Nordhavn into the DH system. The supermarket will deliver excess heat from the refrigeration system into the DH network via the existing DH connection
For further information please contact:
Kristian Honoré Energy Planner Energy Planning Department
Phone: +45 2795 4726 krih@hofor.dk
2. RETURN TEMPERATURES
1. HEAT CONSUMPTION AND TENDENCY
ENHEDSFORBRUG
2
62W/m2
RETUR
2 39 o C
PROFILVARIO
4
100%
FLEXFAKTOR
3. BUILDING DESIGN AND INSTALLATIONS
CUSTOMER IDEAL
4. HEAT PROFILE AND CAPACITY VARIATION
1
2
2,2
3
4
Fig. 4. New heat labelling concept and performance indicators
E N E R G Y A N D E N V I R O N M E N T
Made with FlippingBook Annual report maker