Author(s):
Camelo, Susana 
; Gonçalves, Helder ; Laia, Carlos ; Richard, M.
Date: 2010
Persistent ID: http://hdl.handle.net/10400.9/659
Origin: Repositório do LNEG
Subject(s): Eficiência energética
Document details
The keep Cool II idea and strategy: from "cooling" to "sustainable summer comfort"
Description
The European Energy Performance of Buildings Directive (EPBD) explicitly refers to a "passive cooling techniques, primarily those that improve indoor climatic conditions and the microclimate around buildings". However, in Europe the demand for air conditioning is rising, especially in office buildings and is expected that the cooled floor area will be four times higher in 2020 when compared with 1990 figures. About 40% of our energy use is consumed in buildings and air conditioning represents a significant part. he overcome this problem conventional answer consists on to improve of the energy efficiency of cooling. However, this startegy showed limited results in terms of saving energy and reducing greenhouse gas emissions. In fact, cooling can be avoided (or the need to use energy for cooling) or significantly reduced without risking summer thermal comfort for building occupants, having thus the potential to achieve substantial reductions in energy demad and contributing to the overall objective of reduction CO2 emissions, minimizing the risk of the global warming and of the European climate protection commitments. This paper presents the conclusions of two surveys undertaken in the frame work of the Keep CoolII Project. One centered on evaluating current practices in cooling design, construction and operation, in order to obtain a feel of how widely good practices are known and use and as a basis for the subsequent study on incentives to remedy a set of key barriers and to reach the notion of summer comfort as a service. Indeed, efficient strategies for cooling have been studied for at least two decades, and several campaigns have already been implemented in the EU member states to disseminate knowledge on summer comfort efficiency since the 1990s. The other survey was undertaken in order to review the energy efficency criteria, in the national buildings codes, concerning summer comfort or mechanical cooling system in order to elaborate recommendations towards a sustainable summer comfort. This surver intended update, in a regional basis, the information regarding national building regulations, identifyin the measures adopted and delineating good practices concerning energy consumption, summer comfort and summer requirements. Finnaly, it should be stressed out the key role of the building designer towards sustainable summer comfort. Building codes requirements and design rules needs a proper use by the building designer.
The European Energy Performance of Buildings Directive (EPBD) explicitly refers to a "passive cooling techniques, primarily those that improve indoor climatic conditions and the microclimate around buildings". However, in Europe the demand for air conditioning is rising, especially in office buildings and is expected that the cooled floor area will be four times higher in 2020 when compared with 1990 figures. About 40% of our energy use is consumed in buildings and air conditioning represents a significant part. he overcome this problem conventional answer consists on to improve of the energy efficiency of cooling. However, this startegy showed limited results in terms of saving energy and reducing greenhouse gas emissions. In fact, cooling can be avoided (or the need to use energy for cooling) or significantly reduced without risking summer thermal comfort for building occupants, having thus the potential to achieve substantial reductions in energy demad and contributing to the overall objective of reduction CO2 emissions, minimizing the risk of the global warming and of the European climate protection commitments. This paper presents the conclusions of two surveys undertaken in the frame work of the Keep CoolII Project. One centered on evaluating current practices in cooling design, construction and operation, in order to obtain a feel of how widely good practices are known and use and as a basis for the subsequent study on incentives to remedy a set of key barriers and to reach the notion of summer comfort as a service. Indeed, efficient strategies for cooling have been studied for at least two decades, and several campaigns have already been implemented in the EU member states to disseminate knowledge on summer comfort efficiency since the 1990s. The other survey was undertaken in order to review the energy efficency criteria, in the national buildings codes, concerning summer comfort or mechanical cooling system in order to elaborate recommendations towards a sustainable summer comfort. This surver intended update, in a regional basis, the information regarding national building regulations, identifyin the measures adopted and delineating good practices concerning energy consumption, summer comfort and summer requirements. Finnaly, it should be stressed out the key role of the building designer towards sustainable summer comfort. Building codes requirements and design rules needs a proper use by the building designer.
Document Type
Conference Object
Language English
Language English
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