The Experts below are selected from a list of 141 Experts worldwide ranked by ideXlab platform
Simon Kontoyiannidis - One of the best experts on this subject based on the ideXlab platform.
-
building typologies as a tool for assessing the energy performance of residential Buildings a case study for the hellenic building stock
Energy and Buildings, 2011Co-Authors: E Dascalaki, Kalliopi G Droutsa, Constantinos A Balaras, Simon KontoyiannidisAbstract:Successful strategies towards minimizing the energy consumption and greenhouse gas emissions attributed to the building sector require knowledge on the energy-related characteristics of the existing building stock. Despite the numerous studies on energy conservation applications in Buildings, current knowledge on the energy-related characteristics of the building stock still remains limited. Building typologies can be a useful instrument to facilitate the energy performance assessment of a building stock. This work is based on a harmonised structure for European building typologies (TABULA) developed for residential Buildings, but the methodology may be extended to the tertiary sector as well. National typologies are sets of Model Buildings with characteristic energy-related properties representative of a country's building stock. The Model Buildings are used as a showcase for demonstrating the energy performance and the potential energy savings from typical and advanced energy conservation measures (ECMs) on the thermal envelope and the heat supply system. The proposed Hellenic residential building typology is presented for the first time along with an assessment of various ECMs that are used for an estimate of the energy performance of building stock in Greece in an effort to meet the 9% indicative national energy savings target by 2016.
-
Building typologies as a tool for assessing the energy performance of residential Buildings ― A case study for the Hellenic building stock
Energy and Buildings, 2011Co-Authors: E Dascalaki, Kalliopi G Droutsa, Constantinos A Balaras, Simon KontoyiannidisAbstract:Successful strategies towards minimizing the energy consumption and greenhouse gas emissions attributed to the building sector require knowledge on the energy-related characteristics of the existing building stock. Despite the numerous studies on energy conservation applications in Buildings, current knowledge on the energy-related characteristics of the building stock still remains limited. Building typologies can be a useful instrument to facilitate the energy performance assessment of a building stock. This work is based on a harmonised structure for European building typologies (TABULA) developed for residential Buildings, but the methodology may be extended to the tertiary sector as well. National typologies are sets of Model Buildings with characteristic energy-related properties representative of a country's building stock. The Model Buildings are used as a showcase for demonstrating the energy performance and the potential energy savings from typical and advanced energy conservation measures (ECMs) on the thermal envelope and the heat supply system. The proposed Hellenic residential building typology is presented for the first time along with an assessment of various ECMs that are used for an estimate of the energy performance of building stock in Greece in an effort to meet the 9% indicative national energy savings target by 2016.
E Dascalaki - One of the best experts on this subject based on the ideXlab platform.
-
building typologies as a tool for assessing the energy performance of residential Buildings a case study for the hellenic building stock
Energy and Buildings, 2011Co-Authors: E Dascalaki, Kalliopi G Droutsa, Constantinos A Balaras, Simon KontoyiannidisAbstract:Successful strategies towards minimizing the energy consumption and greenhouse gas emissions attributed to the building sector require knowledge on the energy-related characteristics of the existing building stock. Despite the numerous studies on energy conservation applications in Buildings, current knowledge on the energy-related characteristics of the building stock still remains limited. Building typologies can be a useful instrument to facilitate the energy performance assessment of a building stock. This work is based on a harmonised structure for European building typologies (TABULA) developed for residential Buildings, but the methodology may be extended to the tertiary sector as well. National typologies are sets of Model Buildings with characteristic energy-related properties representative of a country's building stock. The Model Buildings are used as a showcase for demonstrating the energy performance and the potential energy savings from typical and advanced energy conservation measures (ECMs) on the thermal envelope and the heat supply system. The proposed Hellenic residential building typology is presented for the first time along with an assessment of various ECMs that are used for an estimate of the energy performance of building stock in Greece in an effort to meet the 9% indicative national energy savings target by 2016.
-
Building typologies as a tool for assessing the energy performance of residential Buildings ― A case study for the Hellenic building stock
Energy and Buildings, 2011Co-Authors: E Dascalaki, Kalliopi G Droutsa, Constantinos A Balaras, Simon KontoyiannidisAbstract:Successful strategies towards minimizing the energy consumption and greenhouse gas emissions attributed to the building sector require knowledge on the energy-related characteristics of the existing building stock. Despite the numerous studies on energy conservation applications in Buildings, current knowledge on the energy-related characteristics of the building stock still remains limited. Building typologies can be a useful instrument to facilitate the energy performance assessment of a building stock. This work is based on a harmonised structure for European building typologies (TABULA) developed for residential Buildings, but the methodology may be extended to the tertiary sector as well. National typologies are sets of Model Buildings with characteristic energy-related properties representative of a country's building stock. The Model Buildings are used as a showcase for demonstrating the energy performance and the potential energy savings from typical and advanced energy conservation measures (ECMs) on the thermal envelope and the heat supply system. The proposed Hellenic residential building typology is presented for the first time along with an assessment of various ECMs that are used for an estimate of the energy performance of building stock in Greece in an effort to meet the 9% indicative national energy savings target by 2016.
Eric R. Pardyjak - One of the best experts on this subject based on the ideXlab platform.
-
A study of flow fields in step-down street canyons
Environmental Fluid Mechanics, 2015Co-Authors: Bhagirath Addepalli, Eric R. PardyjakAbstract:A step-down street canyon is a street canyon in which the upwind building height ( $$H_{u}$$ H u ) is greater than the downwind building height ( $$H_{d}$$ H d ) ( $$H_{u}>H_{d}$$ H u > H d ). Here, the effect of downwind building height and canyon width on the flow structure in isolated step-down canyons is investigated through wind-tunnel measurements. The measurements were acquired along the vertical symmetry plane of the Model Buildings using two-dimensional particle image velocimetry for normal approach flow. For the present study, $$H_{u}$$ H u was kept constant at $$120$$ 120 mm, and $$H_{d}$$ H d was increased in increments of $$\approx $$ ≈ 0.08 $$H_{u}$$ H u , to span the range: $$0.08\le H_{d}/H_{u}\le 1$$ 0.08 ≤ H d / H u ≤ 1 . The configuration $$H_{d}/H_{u} \approx 1$$ H d / H u ≈ 1 corresponds to a deep canyon. The footprints of the Buildings were square, with the widths ( $$W$$ W ) and lengths ( $$L$$ L ) being, $$W (= L) \approx 32$$ W ( = L ) ≈ 32 mm. Four different street-canyon widths ( $$S$$ S ) were considered, with $$S/W \approx 2.5, 2, 1.5, 1$$ S / W ≈ 2.5 , 2 , 1.5 , 1 . This resulted in a total of 48 test cases, with 12 cases for every street-canyon width. The flow topology in the near-wake of an isolated tall building ( $$H_{d}=0$$ H d = 0 ) is characterised by a bow-shaped structure comprising the vortex core, saddle point, and ground originating shear layer. For $$S/W \approx 2.5, 2$$ S / W ≈ 2.5 , 2 , and $$1.5$$ 1.5 , increasing the downwind building height from $$H_{d}/H_{u} \approx 0.08$$ H d / H u ≈ 0.08 to $$1$$ 1 resulted in the in-canyon flow structure transitioning from wake dominated to deep canyon wake interference regimes . Similar increase of the downwind building height for $$S/W \approx 1$$ S / W ≈ 1 resulted in the flow structure transitioning from wake dominated to deep canyon skimming flow regime . The results indicate that in step-down canyons formed by tall and slender Buildings, momentum transport into and out of the canyon around the building sidewalls plays a crucial role in the determining the overall flow patterns in the canyon.
-
Investigation of the Flow Structure in Step-Up Street Canyons—Mean Flow and Turbulence Statistics
Boundary-Layer Meteorology, 2013Co-Authors: Bhagirath Addepalli, Eric R. PardyjakAbstract:A step-up street canyon is a characteristic urban element composed of two Buildings in which the height of the upwind building ( $$H_\mathrm{u}$$ ) is less than the height of the downwind building ( $$H_\mathrm{d}$$ ). Here, the effect of canyon geometry on the flow structure in isolated step-up street canyons is investigated through isothermal wind-tunnel measurements. The measurements were acquired along the vertical symmetry plane of Model Buildings using two-dimensional particle image velocimetry (PIV) for normal approach flow. The building-height ratios considered were: $$H_\mathrm{d}/ H_\mathrm{u} \approx 3$$ , and $$H_\mathrm{d}/ H_\mathrm{u} \approx 1.67$$ . For each building-height ratio, the along-wind lengths ( L ) of the upwind and downwind Buildings, and the street-canyon width ( S ) were kept constant, with $$L \approx S$$ . The cross-wind widths ( W ) of the upwind and downwind Buildings were varied uniformly from $$W/S \approx 1$$ through $$W/S \approx 4$$ , in increments of $$W/S \approx 1$$ . The objective of the work was to characterize the changes in the flow structure in step-up canyons as a function of W / S , for fixed L , S , and $$H_\mathrm{d}/H_\mathrm{u}$$ values. The results indicate that the in-canyon flow structure does not vary significantly for $$H_\mathrm{d}/H_\mathrm{u} \approx 3$$ for the W / S values considered. Qualitatively, for $$H_\mathrm{d}/H_\mathrm{u} \approx 3$$ , the upwind building behaves as an obstacle in the upwind cavity of the downwind building. In contrast, the flow patterns observed for the $$H_\mathrm{d}/H_\mathrm{u} \approx 1.67$$ configurations are unique and counter-intuitive, and depend strongly on building width ( W / S ). For $$W/S \approx 1$$ and $$W/S \approx 2$$ , the effect of lateral flow into the canyon is so prominent that even the mean flow patterns are highly ambiguous. For $$W/S \approx 3$$ and 4, the flow along the vertical symmetry plane is more shielded from the lateral flow, and hence a stable counter-rotating vortex pair is observed in the canyon. In addition to these qualitative features, a quantitative analysis of the mean flow field and turbulence stress field is presented.
Kalliopi G Droutsa - One of the best experts on this subject based on the ideXlab platform.
-
building typologies as a tool for assessing the energy performance of residential Buildings a case study for the hellenic building stock
Energy and Buildings, 2011Co-Authors: E Dascalaki, Kalliopi G Droutsa, Constantinos A Balaras, Simon KontoyiannidisAbstract:Successful strategies towards minimizing the energy consumption and greenhouse gas emissions attributed to the building sector require knowledge on the energy-related characteristics of the existing building stock. Despite the numerous studies on energy conservation applications in Buildings, current knowledge on the energy-related characteristics of the building stock still remains limited. Building typologies can be a useful instrument to facilitate the energy performance assessment of a building stock. This work is based on a harmonised structure for European building typologies (TABULA) developed for residential Buildings, but the methodology may be extended to the tertiary sector as well. National typologies are sets of Model Buildings with characteristic energy-related properties representative of a country's building stock. The Model Buildings are used as a showcase for demonstrating the energy performance and the potential energy savings from typical and advanced energy conservation measures (ECMs) on the thermal envelope and the heat supply system. The proposed Hellenic residential building typology is presented for the first time along with an assessment of various ECMs that are used for an estimate of the energy performance of building stock in Greece in an effort to meet the 9% indicative national energy savings target by 2016.
-
Building typologies as a tool for assessing the energy performance of residential Buildings ― A case study for the Hellenic building stock
Energy and Buildings, 2011Co-Authors: E Dascalaki, Kalliopi G Droutsa, Constantinos A Balaras, Simon KontoyiannidisAbstract:Successful strategies towards minimizing the energy consumption and greenhouse gas emissions attributed to the building sector require knowledge on the energy-related characteristics of the existing building stock. Despite the numerous studies on energy conservation applications in Buildings, current knowledge on the energy-related characteristics of the building stock still remains limited. Building typologies can be a useful instrument to facilitate the energy performance assessment of a building stock. This work is based on a harmonised structure for European building typologies (TABULA) developed for residential Buildings, but the methodology may be extended to the tertiary sector as well. National typologies are sets of Model Buildings with characteristic energy-related properties representative of a country's building stock. The Model Buildings are used as a showcase for demonstrating the energy performance and the potential energy savings from typical and advanced energy conservation measures (ECMs) on the thermal envelope and the heat supply system. The proposed Hellenic residential building typology is presented for the first time along with an assessment of various ECMs that are used for an estimate of the energy performance of building stock in Greece in an effort to meet the 9% indicative national energy savings target by 2016.
Constantinos A Balaras - One of the best experts on this subject based on the ideXlab platform.
-
building typologies as a tool for assessing the energy performance of residential Buildings a case study for the hellenic building stock
Energy and Buildings, 2011Co-Authors: E Dascalaki, Kalliopi G Droutsa, Constantinos A Balaras, Simon KontoyiannidisAbstract:Successful strategies towards minimizing the energy consumption and greenhouse gas emissions attributed to the building sector require knowledge on the energy-related characteristics of the existing building stock. Despite the numerous studies on energy conservation applications in Buildings, current knowledge on the energy-related characteristics of the building stock still remains limited. Building typologies can be a useful instrument to facilitate the energy performance assessment of a building stock. This work is based on a harmonised structure for European building typologies (TABULA) developed for residential Buildings, but the methodology may be extended to the tertiary sector as well. National typologies are sets of Model Buildings with characteristic energy-related properties representative of a country's building stock. The Model Buildings are used as a showcase for demonstrating the energy performance and the potential energy savings from typical and advanced energy conservation measures (ECMs) on the thermal envelope and the heat supply system. The proposed Hellenic residential building typology is presented for the first time along with an assessment of various ECMs that are used for an estimate of the energy performance of building stock in Greece in an effort to meet the 9% indicative national energy savings target by 2016.
-
Building typologies as a tool for assessing the energy performance of residential Buildings ― A case study for the Hellenic building stock
Energy and Buildings, 2011Co-Authors: E Dascalaki, Kalliopi G Droutsa, Constantinos A Balaras, Simon KontoyiannidisAbstract:Successful strategies towards minimizing the energy consumption and greenhouse gas emissions attributed to the building sector require knowledge on the energy-related characteristics of the existing building stock. Despite the numerous studies on energy conservation applications in Buildings, current knowledge on the energy-related characteristics of the building stock still remains limited. Building typologies can be a useful instrument to facilitate the energy performance assessment of a building stock. This work is based on a harmonised structure for European building typologies (TABULA) developed for residential Buildings, but the methodology may be extended to the tertiary sector as well. National typologies are sets of Model Buildings with characteristic energy-related properties representative of a country's building stock. The Model Buildings are used as a showcase for demonstrating the energy performance and the potential energy savings from typical and advanced energy conservation measures (ECMs) on the thermal envelope and the heat supply system. The proposed Hellenic residential building typology is presented for the first time along with an assessment of various ECMs that are used for an estimate of the energy performance of building stock in Greece in an effort to meet the 9% indicative national energy savings target by 2016.