The Netherlands is aiming to reduce by 40% the CO2 emissions by 2025 by implementing several initiatives to the new built environment.However, most of the initiatives disregard the existing building stock. There is a need for creative solutions in order to compile conservation with new functions to turn heritage into an advantage for the society thus promoting a sustainable development. The main aim of this research is to provide a better understanding on how to improve a renovated building to promote energy reduction and preserve its historical value.
The interventions that are exposed towards the outside have higher HI. Especially the ones implemented in the façade, since, it is the attribute with the highest HSR. The scale which is impact the most is the typology. The urban scale seems to have the least impact.
the overall impact per intervention is less than 2, being the new roof and external insulation A the interventions with higher impact. Even though the HI seems to be adequate for a renovation of a highly valuable building, it is important to take into account that most of the renovations will consider several interventions that consequently will increase the HI.
Heritage Significance Assessment
Building elements. The consistency and rhythm on the façade gives value to the streetscape.
Typology. The urban structure value lies on its peaceful image and the functionalist urbanism structure.
Neighbourhood. The strips, hooks and courts buildings present architectural entity with its own characteristics by composing carefully the architectural unit with a clear building mass.
Urban. The urban structure presents correlation between public space, green areas and the building. The parceling system creates a rhythmic composition of size and scale, following a sequence: residential area, field, allotment, architectural unit and building.
The case study through time
Possible renovations
Heritage Impact Assessment
Comparative Analysis
The ENH reduction compare to the Pre-case shows that a reduction of around 50% is possible when using internal/external insulation, followed by the solar collector. The Base-case shows that almost 100% reduction is possible when placing solar collector.
The maximum reduction of ENH the HI is as well affected, creating a stress between them, as it is the case for the external insulation, new roof and solar collector. Nevertheless, the interventions located towards the inside of the apartments reduce the ENH significantly while the HI is less. Finally, the interventions which impact the most are not the one with less energy reduction.
Conclusion
It has been proven than an energy reduction when optimizing the envelope can benefit the energy performance of the building without harming the heritage significance when implementation of internal interventions. The methodology implemented can be adapted to different case studies in order to aim as a decision-making tool, taking into account energy savings as well as the heritage impact. Historical buildings are valuable for their uniqueness. Despite of the inevitable impact that a renovation may have tailored and individual solutions can be implemented to mitigate their impact. Nevertheless, they involve extra economical resources. Thus, the economic implications and social aspects should also be integrated and be compared to both aspects analyzed. This will lead to a holistic approach that balances all the aspects of sustainability.
MIO PROJECT
Towards Low Energy Renovation
"Dudokhaken" as case study
