Case studies

ProGETonE solutions are proposed for 4 case studies (Greece, Italy, Romania and The Netherlands). The project covers the development of feasiblity studies for the cases in Greece, Italy and Romania, whereas for the case in Groningen only the structural study is undergone within project activities. In addition, the case in Athens will be fully implemented at real scale for demonstration purposes.

Athens (Greece)

The pilot case in Athens is a typical student house from the 80’s own by the National and Kapodistrian University of Athens, located in the University Campus of Zografou area, in the eastern part of Athens. Zografou is one of the biggest suburbs of the Attica region. The residence counts with 138 rooms for students. The buildings’ main structure is reinforced concrete (pillars and beams), concrete slabs and hollow brick external walls. This is a typical construction typology and is globally presented in all Attica suburbs and the city centre. It has also a common structure with similar building blocks all over Europe. Each building block has centralized heating system plant. Existing windows are from aluminum or wooden frame with single glass. The shell of the building lacks thermal insulation while at the same time its facilities have not provided satisfactory energy-saving systems with the result that the building cannot be considered compatible with modern needs of energy economy.

The design proposals are very advanced and in the following months the tender for carrying out the works will be elaborated.

Brasov (Romania)

This social house, built in 1972, is one of the ProGETOnE’s feasibility cases. Some design proposals have been worked among project partners to tackle multiple needs (technical, energy and social aspects). The municipality of Brasov is one of the project partners and it is in charge of the daily management of the building and the direct contact with occupants.

The building in Brasov consists of 25 apartment units for a total of 1850 m2. The apartments were built with a structure of reinforced concrete, on inside with prefabricated panels and on the outside with bricks. The current regulation in Romania does not permit building energy renovation actions without prior seismic and structural strengthening.

Progetone is considering an exoskeleton solution for this building that will combine 2 of the pillars of the project’s scope: the architectural and the energetic aspect.

Groningen (The Netherlands)

In the Dutch province of Groningen natural gas has been extracted since the late 50’s. Because of this, Groningen has experienced several earthquakes in the last decades. Although the earthquakes have only reached a mere magnitude 3.6 on the Richter scale, many houses have been damaged. The shallow induced earthquakes generate much larger peak ground accelerations than tectonic earthquakes would. In the last two years extensive studies have been done, looking at the maximum expected earthquakes for the coming decades. The current building stock will have to be strengthened in the coming years to be able to comply with the safety requirements. If one would only look at the terraced houses and other single-family dwellings, estimates range from 5.000 to 50.000 houses that may be renovated. The Dutch government, the local governments and the gas company NAM all see this big scale renovation as a good opportunity to also improve the energy footprint of these buildings. Because of the magnitude of the operation it will have a big impact on the global energy consumption of this part of the Netherlands. The main task is to engineer a very cost effective strengthening solution for the standard 1960’s and 1970’s terraced house. This will then have to be altered and reused to be able to use for other types of houses. All strengthening solutions will also be combined with new insulated facades and new energy services to the latest techniques, with zero emission as the main goal.

Reggio Emilia (Italy)

The Italian case study consists in a series of building located in different areas around the periphery of Reggio Emilia. The building type has been identically reproduced and built in the period of four years 1985 – 1989 in several different villages around the city (Bagnolo, Castelnuovo Sotto, Cavriago, Correggio and Poviglio). In total, in the territory, 7 building blocks can be found. Each block has two staircases serving 6 apartments each for a total of 12 apartment units per block. The ground floor is destined to cellars and communal spaces while 3 storeys are destined to residency. There are two different dwellings’ types: Type A two room apartment for an overall surface of 43 m2, Type B three room apartment for an overall surface of 55 m2. Type A has a balcony loggia. The buildings differ only because of the different location and consequently often different orientation/exposure. The buildings’ structure is concrete skeleton and the envelope consists in precast concrete panels, non-insulated. Windows are wooden window frames with single glass. The energy performance of the entire blocks is therefore extremely low and there is a urgent need for renovation to reduce the energy costs even if the buildings are not significantly old.

The apartments are a property of the Social Housing Association called ACER who is also managing the entire building blocks and taking care of regular maintenance.

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