The Dynamic Perspective of the Energy Performance Certification (EPC)

Use Cases

E-DYCE methodology features two parallel and complementary approaches:

  • To define, elaborate, report and make openly available as a technology neutral Digital EPC certification process, and in parallel
  • The certification process to be validated by applying E-DYCE DEPC in a number of building case studies across 4 countries (IT, CH, DK, CY) and five locations (Torre Pellice, Geneva, Aalborg, Frederikshavn and Nicosia)

CS#1 Geneva, Switzerland features an interesting mix of underperforming nZEB, old inefficient buildings and new construction.

This case study will focus on 4 specific buildings, which are either being recently refurbished but underperforming regarding energy savings, or were not optimized, or not at all renovated.
Reasons for implementation of E-DYCE activities
The objective of the Geneva case studies is to implement E-DYCE in different individual buildings that have abundance of background information available to identify patterns related to user behaviour and the performance of buildings of various levels of energy efficiency and smartness, such as achieving better dynamic control of the heating system efficiency. E-DYCE will be customized to provide information of the interior climate and indoor air quality to the tenants with IEQ smartphone apps, and the installation of smart water information board for hot water consumption will provide an additional source of data.
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CS#2 Torre Pellice, Italy is centred on public school buildings in view of the national plan for school refurbishment.

This case study will address the school buildings in Italy located in a cold climate, presenting very high energy consumptions. It will explore the capacity of the dynamic system to give more precise predictions as public buildings are subjected to higher standard requests in terms of energy efficiency in comparison to private buildings.
Two more residential houses were selected representing typical building typologies in small/medium municipalities where users are also the owners with the related interest in controlling energy consumptions and defining proper energy retrofitting actions.
Reasons for implementation of E-DYCE activities
The buildings located in Torre Pellice will provide an excellent opportunity to investigate the application of E-DYCE to different building typologies due for NZEB refurbishment, which is a social and economic need as well as a suitable scenario for the renovation roadmap feature of E-DYCE. The accuracy of the dynamically calculated and measured behaviour will be evaluated, differences between current EPC (steady state), dynamic simulated and operational ratings testing their recent retrofitting actions will be located, the free running potential and peak demands will be assessed, the comfort range will be identified and the use of ITC methods will be tested.
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CS#3 Nicosia, Cyprus will exploit the free running potential of an underperforming nZEBuilding in warm climate.

The case will assess the system predictions for a hot climate for office buildings with a very high degree of free running mode and extensive passive technics. The design of the selected buildings pretends 80% of the time free running mode for near zero passive energy buildings. These buildings present also a higher risk of user behaviour non predicted, by the design or labelling calculations.
Reasons for implementation of E-DYCE activities:
The building is now labelled with its passive technics being almost ignored in the process, as they cannot be modelized in the static EPC model. The high natural light autonomy (>70%), the natural ventilation and night ventilative cooling concept, the use of ceiling fans, the combination of the high thermal mass with night cooling, must be encountered in the EPC energy calculations. Changes in users’ behavior will be detected regarding heating and cooling set point temperatures, and the hours of use of the windows and the ceiling fans. A dynamic energy consumption monitoring will orient possible optimization actions, either concerning system settings, or the user behavior.
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CS#4 Aalborg and Frederikshavn, Denmark will scale up implementation to a multi-apartment level.

The case will examine residential buildings of the period 1961 – 1972 falling all in a category of Danish houses with high possibility for improvement (typically energy label G to C). However, better classes are given normally to the buildings that have already undergone some renovations and improvements. It is also expected that the majority of these apartment buildings will be renovated and not demolished in order to preserve architectural heritage of the period. The case considers three multistorey buildings and which are under a monitoring platform offering energy savings, online data access on all platforms, and 24/7 monitoring of heating and electricity.
Reasons for implementation of E-DYCE activities:
It will concern the two (2) stages collection of of (31) input data, first about the building and its systems from various sources, mostly administrative. Then the second stage concerns collection, processing and storage of data about building energy use – heat use in particular, representing a high-tech approach to data collection and storage that enables deep integration of E-DYCE platform.
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There is also a fifth (5th) case CS#5 Geneva Switzerland, of a region-wide collection of data for comparative assessments and DEPC evaluation. It is consolidated with CS#1 Geneva because of same location, still it is with a different scope and expected results.

The geographical information system of the canton of Geneva runs the system to its full capacity, including public dimensional, typological and yearly energy consumption data of all the territory combined with dynamic real time energy consumption, weather and interior temperature data of a building stock sample. This case study will test the system ability to support strategic decisions to a territory level and investment strategies to a building stock level.
Reasons for implementation of E-DYCE activities:
With the existing data, E-DYCE platform will be able to compare theoretical and measured annual energy consumption. In addition to the public data, private databases may provide dynamic energy consumption with time resolution between 1 minute (automatic gas, oil and district heating meters) and 15 days (manual reading of the counters), according to the metering system. (34) E-DYCE system will use the developed user cloud interface to combine dynamic and static data and complete the existing static theoretical/measured energy consumption, with the dynamic real time effective and expected energy consumption / interior temperature. and Similarly will be for the buildings equipped with automatic or manual energy meters, providing grounds for dynamic public strategies with proof evidenced data.
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