IEA ES Annex 49: Low Exergy Systems for High-Performance Buildings and Communities

The objective of Annex 49 is the development of approaches for reducing the exergy demand of buildings, so as to reduce the CO2 emissions of the building stock and support structures for sustainable and reliable energy systems in the building sector. To achieve the objectives of Annex 49, the following activities have been carried out:Application of exergy analysis and providing tools, guidelines, best-practice examples and background information for planners and decision makers in the fields of construction, energy and politics Support of cost-efficient low-energy/exergy measures for renovation and new building taking into account both the residential and the service sector Promotion of exergy-related performance analysis of buildings, particularly from the perspectives of communities / regions

VisErgyControl - Integral control system for daylight and artificial lighting for high visual and melanopic comfort with minimized primary energy consumption

Within the project VisErgyControl an integral, simulation-based, energy-efficient open loop daylight and artificial lighting control system had been developed. The research project focuses on the visual and melanopic requirements of users while minimizing the energy consumption for heating and cooling.

Facade Collectors

Development of technique and components for the production of back ventilation-free thermal flat collectors.

Site certificate

Possibilities and requirements of transferring the Swiss “2000-Watt Site” certificate to Austria

GreenTech-Renovation - Energetic Renovation of Glass Buildings of Architectural Value

The focus of the GreenTech-Renovation project was to find innovative solutions for the energetic renovation of architecturally valuable buildings with a high proportion of glass. A future-oriented building physics concept that includes the use of alternative forms of energy had been developed for this purpose. With ecological and social commitment, an intelligent usage concept could strengthen the energetic renovation concepts and guarantee their sustainability. The 10-Rs of the circular economy (Refuse, Rethink, Reduce, Reuse, Repair, Refurbish, Remanufacture, Repurpose, Recycle, Recover) will serve as a guideline.

KlimaStadtLinz2030: Linz and its path to climate neutrality by 2030 - Preparation for the EU - Mission “100 Climate-neutral Cities by 2030”

The research project investigates whether and how it is possible for the city of Linz to achieve climate neutrality by 2030 within its own sphere of influence. A common vision, which is being developed with the citizens in a participatory manner, unites the opportunities that arise for the city through the measures necessary for this goal.

Energy Mosaic Austria - Austrianwide modelling and web-based visualisation of energy consumption and greenhouse gas emissions on local level

The project consists of a modelling and a web-based visualisation of energy consumption and greenhouse gas emissions of all Austrian cities and municipalities considering all kinds of land use and mobility. The results deliver a sound basis for numerous energy and climate relevant fields of action and for awareness raising of decision makers and the public.

P2PQ - Peer2Peer im Quartier

The research project Peer2Peer im Quartier deals with applications optimizing the selfconsumption of PV-generated energy within urban quarters by enabling peer-to-peer relations among energy prosumers based on Blockchains. Aim is to develop and validate these applications in real operation.

New Communal Centre Ludesch

Community centre with multi-functional usage (cultural events, library, post office, bakery, grocery, daycare, private apartments, meeting point of the generations); role model for consistent implementation of ecological criteria in public tendering; plausible evidence of cost efficiency

New aluminium - sun collector

The development of a new aluminium - sun collector, where the working- fluid completely run through the absorber- area, to reach a higher efficiency.

PHOTOVOLTAIC WATER Solution

Passive House refurbishment facade with integrated photovoltaic modules for direct, current-based warm water preheating. The GIWOG, an energy-conscious and environmentally and socially oriented client, intends to undertake an energy-related modernisation project, which will further optimise energy consumption to be more efficient at an apartment complex in Graz, main street 302-306. The goal is to lower the energy consumption for heating and hot water from the current level of approximately 135 kWh /m²a to approximately 8 kWh /m²a. The planned measures should correspond with an overall energy consumption reduction of approx. 94 %.

Solar Assisted Heating Networks

An investigation of the economic and ecological usefulness of coupling two CO2 neutral energy sources; solar installations for multi-family houses, producing standardised systems concepts and planning guidelines.

REVITALISING with S.A.M. - Synergy Activation Modules

Case study for the development of modules that allow for the revitalisation of existing structures without interruption of utilization (two studies, one realisation).

Solar cooling machine with a cooling power of 2 kW

Development and building of a prototype of a coolingmachine with a cooling power of 2 kW, tests and optimizing on a test facility, connection to a solar unit and utilization for air conditioning.

e-retrofit kit - tool kit for passive house retrofit

Development of an internet-based tool for passive house retrofit für - target group social housing companies. Actualization of tool after test and evaluation in case-studies. dissemination activities in austria.

Building and modernising with "Building of Tomorrow"

The project BauModern turned to non-profit and commercial housing developers and real estate managements. In close co-operation with the federations of the housing and real estate economy has been achieved that builders are informed about market-suited innovative technologies and concepts and use these strengthened for their projects both in the new building and in the refurbishment.

Building of Tomorrow for the construction industry

Dissemination of results of the research initiative "Building of tomorrow" for two specific target groups - master builder and installer - implementation in further vocational training concepts

e80^3-Buildings - Sub project 4: Demonstration object

Alongside the realisation of the plus energy building in Kapfenberg, a demonstration project is scheduled to be created that accomplishes an economically viable and technically innovative solution for the future.

OPEN HEAT GRID - Open Heat Grids in urban hybrid systems

The primary research topic of OPEN HEAT GRID was to investigate the possibilities of enforcing the feed-in of industrial waste heat into existing district heating networks. The project results show that excess heat is not for free: despite minimal variable costs, the investment costs need to satisfy usual payback periods. The analysis shows that there is no need for a regulation in the sense of a feed-in obligation or market liberalization. However, from an economic point of view, information asymmetries exist, which may lead to irrational decisions.

Digitization in the construction and real estate industry

In the multitude of digital possibilities, it is very difficult to maintain an overview, to assess trends and potentials, and to recognize correlations. This report therefore aims to describe the current state of the art and the market assessment of promising digital technologies. Information is provided on concrete use cases, added value and challenges of the respective technologies. The analyses presented serve to assess the potential and set the strategic course for the integration of the currently most important digital technologies in the construction and real estate industry.