Interactive Case Study Data Explorer Online

CRAVEzero Talk4Experts in Austria/ Salzburg – 7.11.2019


Energy Lunch Graz Austria – CRAVEzero / 17.09.2019 /Open News


Presentation of the CRAVEzero project in Graz

CRAVEzero @ SBE Conference 2019


CRAVEzero: Special Issue of Journal “Nachhaltige Technologien”

The CRAVEzero Consortium is responsible for an edition of the journal “nachhaltige technologien” about life cycle costs of buildings.

There are costs for constructing buildings, but there are also costs with regard to the whole life cycle of a building. Defining the life cycle of a building different periods can be determined: the production of building materials (building products), the construction and utilisation period as well as the disposal period. Currently, if buildings are planned, the construction period is well considered, whereas the utilisation period is considered unsufficiently and the disposal period often is neclected.

Download the full Journal here

According to the European Commission 50% of the produced materials and energy consumption and a third of the water usage account for construction and usage of buildings. Moreover the building sector is responsible for about 30% of waste (construction, usage, renovation and dumping of constructing materials.

Download the full Journal here

Therefore it is very important to consider all these aspects to a much higher extent in future. Requirements for sustainable buildings can be realised as soon as economic, ecologic and health aspects are considered within their interdependency. The current issue of „nachhaltige technologien“ deals with integral planning with regard to building life cycles and addresses innovative and interesting approaches.

Pinboard beta version for testing is now online

Visit the pinboard here:

The “CRAVEzero pinboard” – an interactive web-based structured framework supporting in developing low LCC nZEBs is online in a first beta version.

CRAVEzero pinboard is a structured framework organizing all needed information and tools to build:

  • an effective low life cycle cost nZEB business model
  • reliable lifecycle cost databases with cost reduction potentials in processes and
  • technologies methodologies, robust solutions and business models for low LCC NZEBs.

Visit the pinboard here:

Pinboard on Youtube

CRAVEzero @ International Student Energy Summit 2019 in London

Essam Elnagar presented the CRAVEzero project at the International Student Energy Summit 2019 at the Imperial College in London.

The International Student Energy Summit 2019 is an interdisciplinary summit created for students, by students. Over the course of four days, 650 delegates from all corners of the world attended the conference encompassing industry & technology, society & environment, markets & finance, and youth empowerment.

Congratulations Essam!

Special CRAVEzero Session @ SBE Conference 2019

CRAVEzero@sbe19_graz: meet us on Thursday in Graz and take part in our 2 special sessions on next generation nZEBs with contributions from our partners Fraunhofer ISE, EURAC and AEE INTEC


Results of optimised nZEB parametric models

Cost performance (EUR/m²) of the case study Aspern IQ over the whole life cycle of the building; comparison of nZEB variant with a building accord-ing to the CRAVEzero approach and the average value

Already today buildings can be realised in the nearly zero and plus energy standard. These buildings achieve extremely low energy demands and low CO2 emissions and can be operated economically. For this reason, the motivation in the CRAVEzero project is not only based on the energy characteristics of buildings, but also on their life cycle costs. However, the broad market deployment of these buildings is progressing very slowly so far, as methods and processes for the cost-optimal integration of efficiency measures and renewable energies are not yet sufficiently described and therefore not yet familiar. As a consequence – many poorly planned buildings are criticised for the fact that the actual energy consumption of highly efficient buildings is higher than the predicted demand and that high-efficiency standards are expensive and uneconomical. The influence of the user behaviour of such energy-efficient buildings is another aspect, which has to be considered to evaluate the impact on the energy consumption of the building.

“bubble chart” of the case study Aspern IQ; bubble size indicates the average CO2 emissions; bubble position is determined by average investment costs and average life cycle costs
“bubble chart” of the case study Aspern IQ; bubble size indicates the average CO2 emissions; bubble position is determined by average investment costs and average life cycle costs

The identification of suitable methods for the energetic-economic optimization of highly efficient buildings in all life cycle phases is a prerequisite for the broad market implementation.

This method was developed earlier in the CRAVEzero project and documented in Deliverable D6.1 “Parametric models for buildings and building clusters: Building features and boundaries”.

In this Deliverable D6.2, the method was applied to the five CRAVEzero case studies Aspern IQ, Alizari, Isola Nel Verde, Les Heliades and MORE to perform parametric calculations and to perform multi-objective energy and cost analysis over the life cycle of the buildings.

Specific costs (EUR/m²) in the different phases of the case study Aspern IQ over the whole life cycle of the building; range between the different parameters indicated as minimum (min), average and maximum (max) values; per-centages represent the deviation from the average value

In total, more than 230,000 variants were calculated and analysed, with the key performance indicators: financing costs, net present value, balanced primary energy demand and balanced CO2 emission. The calculation results can be found in this report as well as on the CRAVEzero pinboard: http://www.cravezero.eu/pinboard/Dashboard/DBInfo.htm


CRAVEzero @ Sustainable Places 2019 Conference

Dr. Roberta Pernetti presenting the CRAVEzero project at the Sustainable Places 2019 Conference in Italy


The CRAVEzero project was showcased in the Sustainable Places 2019 conference in Cagliari. The conference involves designing, building and retrofitting the places we live and work in a more sustainable way. Sustainable Places prides itself on being an ideal platform for the dissemination of research, the conduct of workshops, EU project clustering and networking between stakeholders of all types. Between opening and closing keynote sessions, parallel technical sessions and project-organized workshops are held on conference topic areas.

nZEB Processes

The influence on the process decreases while the costs increase during the life cycle of a nZEB

Download the full report here:

In addition to legal and urban boundaries, buildings are essentially defined by the client. Owners or investors want to construct or renovate buildings for a specific purpose. Also, the buildings technical quality and the comfort standard have to be achieved within project specific budget limitations. Architects and specialised planners translate the client’s ideas and wish into real plans and are responsible for the appropriate execution of the building project. Construction companies and craftsmen from numerous different disciplines are involved in constructing the building.



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