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Integration of advanced ventilated building components and structures for reduction of energy consumption in buildings

Objective



In regions with high levels of solar radiation ventilated structures maintain the temperature of the outer shell of double skinned buildings at a temperature close to ambient temperatures and reducing significantly the impact of incident radiation. For conventional constructions in these regions, surface temperatures can easily reach 75(C to 80(C. depending on surface orientation, tilt and the time of year. By effectively applying this technique over the entire building envelope, it is possible to reduce envelope gains By about 66%. which corresponds to a reduction in energy consumption for cooling of about 20%. The technique can also be beneficial during the heating period by either maintaining the surface of the envelope at close to ambient temperatures and reducing radiation losses or by creating a blanket of insulating air around the building. depending on its mode of operation. Circulation of air within the building structure need not be limited to the air gap of double skinned buildings only. By utilizing the technique of dynamic insulation. wherein ventilation air is drawn through wall insulation to capture outgoing heat. the energy efficiency of buildings can be increased significantly. Studies have demonstrated that approximately 15% of the total annual devoured energy for space heating can be achieved for typical buildings, whilst the issue of using dynamic insulation for cooling remains unsolved. Finally, the design of the building component can be such that it encourages natural ventilation in the building through stack effect or minimizes exterior convection losses by blanketing the building with an insulating air layer. The proposed project - which is based on the common requirement for a precise understanding of the air Sow within and around breathing structures - has the following objectives: . ò to research and develop three innovative ventilated building components by addressing the common problem of the air flow and heat transfer processes within these structures. ò to investigate the range of construction types that these technologies could be applied to, ò to determine their combined winter/summer performance for heating/cooling, ò to develop a methodology and computer tool for evaluating the incorporation of ventilated structures as retrofit options for existing buildings. . to identify the possibilities for integration of these components - or their design philosophies - which each other and within the building envelope. ò to develop a methodology and computer tool for evaluating the incorporation of ventilated structures as retrofit options for existing buildings, . to determine their combined winter/summer performance for heating/cooling, . to investigate the performance and suitability of these components for different climates, and . to ensure results and buildability of the systems. The Technical Program of the research is divided into four main Workpackages: Component design. integration and buildability. Experimental testing; Modeling; and Integration Methodology.

Funding Scheme

CRS - Cooperative research contracts

Coordinator

Prokelyfos SA
Address
9,Valchopoulou Street 9
11471 Athens
Greece

Participants (6)

CAMBRIDGE ARCHITECTURAL RESEARCH LIMITED
United Kingdom
Address
City Road 47, The Eden Centre
CB1 1DP Cambridge
CENTRE FOR RENEWABLE ENERGY SOURCES
Greece
Address
Km 19Th,marathonos Avenue Km 19Th
190 09 Pikermi - Attiki
ENERGY, COMFORT AND ENVIRONMENT S.L.
Spain
Address
3,Avda. Juan De Borbon 22
30007 Murcia
SIMTECH SIMULATION TECHNOLOGY
Austria
Address
120,Riesstrasse 120
8010 Graz
Sealmaster Ltd
United Kingdom
Address
Brewery Road
CB2 4HG Pampisford
ÖKOPLAN - Energietechnische ökologische Beratungs- und PlanungsgesellschaftmbH
Austria
Address
57-59,Mariahilferstrasse 57-59
1060 Wien