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The complicated nature of indoor environmental quality (IEQ) (thermal, visual, acoustic comfort, etc.) dictates a multi-fold approach for desirable IEQ levels to be achieved. The improvement of building shells’ thermal performance, imposed by the constantly revised buildings’ energy performance regulations, does not necessarily guarantee the upgrade of all IEQ-related aspects, such as the construction’s acoustic quality, as most of the commonly used insulation materials are characterized by their low acoustic performance properties. From this perspective the SUstainable PReconstructed Innovative Module (SU.PR.I.M.) research project investigates a new, innovative preconstructed building module with advanced characteristics, which can, among other features, provide a high quality of acoustic performance in the indoor space. The module consists of two reinforced concrete vertical panels, between which the load bearing steel profiles are positioned. In the cavity and at the exterior surface of the panel there is a layer of thermal insulation. For the scope of the analysis, different external finishing surfaces are considered, including cladding with slate and brick, and different cavity insulation materials are examined. The addition of Phase Change Materials (PCM) in different mix proportions in the interior concrete panel is also examined. For the calculation of the sound insulation performance of the building module the INSUL 9.0 software is used. The results were validated through an experimental measurement in the laboratory in order to test the consistency of the values obtained. The results indicate that the examined preconstructed module can cover the sound insulation national regulation’s performance limits, but the implementation of such panels in building constructions should be carefully considered in case of lower frequency noise environments.
Dimitra Tsirigoti; Christina Giarma; Katerina Tsikaloudaki. Indoor Acoustic Comfort Provided by an Innovative Preconstructed Wall Module: Sound Insulation Performance Analysis. Sustainability 2020, 12, 8666 .
AMA StyleDimitra Tsirigoti, Christina Giarma, Katerina Tsikaloudaki. Indoor Acoustic Comfort Provided by an Innovative Preconstructed Wall Module: Sound Insulation Performance Analysis. Sustainability. 2020; 12 (20):8666.
Chicago/Turabian StyleDimitra Tsirigoti; Christina Giarma; Katerina Tsikaloudaki. 2020. "Indoor Acoustic Comfort Provided by an Innovative Preconstructed Wall Module: Sound Insulation Performance Analysis." Sustainability 12, no. 20: 8666.
Heading towards more energy-efficient buildings, legislative requirements are becoming increasingly demanding. A decade ago, the thermal bridge effect was a known deficiency of building facades but, beyond design guidelines, no qualitative or quantitative requirements occurred in order to minimize its impact. The implementation of international standards in many national building codes has shown that the thermal bridge effect may significantly contribute to heat flows through building envelopes. Due to the multifaceted nature of heat flow through thermal bridges, its magnitude is usually estimated on the basis of predefined values or as a surcharge of the overall heat transmission loss. This study aims to investigate the differentiation and inaccuracies derived by the use of such simplified approaches with respect to the determination of the exact solution. In the context of this study, a multifamily building is assumed as a base case and its thermal bridge typologies are identified and analysed. By using an advanced numerical tool, the magnitude of thermal bridges heat flows is calculated for different building envelope thermal transmittance requirements (ranging from slightly to highly thermally insulated elements), representing the envelope thermal transmittance range currently found in most European countries. Results are compared to the respective ones derived from four prevailing methodologies highlighted in modern building codes aiming at calculating the heat flow through thermal bridges. This study reveals that existing approaches for implementing thermal bridges effect have not followed the progress achieved in thermal insulation requirements and the relevant framework should be updated to better support the effort for more rational and precise results.
Theodoros Theodosiou; Katerina Tsikaloudaki; Karolos Kontoleon; Christina Giarma. Assessing the accuracy of predictive thermal bridge heat flow methodologies. Renewable and Sustainable Energy Reviews 2020, 136, 110437 .
AMA StyleTheodoros Theodosiou, Katerina Tsikaloudaki, Karolos Kontoleon, Christina Giarma. Assessing the accuracy of predictive thermal bridge heat flow methodologies. Renewable and Sustainable Energy Reviews. 2020; 136 ():110437.
Chicago/Turabian StyleTheodoros Theodosiou; Katerina Tsikaloudaki; Karolos Kontoleon; Christina Giarma. 2020. "Assessing the accuracy of predictive thermal bridge heat flow methodologies." Renewable and Sustainable Energy Reviews 136, no. : 110437.
Despite the multiple advantages of prefabricated compared to conventional buildings, such as significant reductions in cost and time, improved quality and accuracy in manufacture, easy dismantling and reuse of components, reduction in environmental degradation, increase of productivity gains, etc., they still share a small part of the European building stock, mainly in the Mediterranean. This paper attempts to highlight the potential of prefabricated buildings to achieve advanced levels of performance, particularly as regards their thermal and energy behavior. More specifically, in this paper the energy needs of a single-family building constructed with prefabricated elements is analyzed, considering different climate contexts. The prefabricated elements comprising the building envelope were developed in order to address specific requirements with respect to their structural, hygrothermal, energy, fire, acoustical, and environmental performance, within the research project SUPRIM (sustainable preconstructed innovative module). The new multifunctional building element, also incorporating phase change materials for increased latent thermal heat storage, has been proven to be beneficial in all the examined climate zones. The results of the relevant studies will highlight the contribution of the new prefabricated element to the sustainability of the overall construction, as well as its advantages when compared with conventional constructions.
Stella Tsoka; Theodoros Theodosiou; Konstantia Papadopoulou; Katerina Tsikaloudaki. Assessing the Energy Performance of Prefabricated Buildings Considering Different Wall Configurations and the Use of PCMs in Greece. Energies 2020, 13, 5026 .
AMA StyleStella Tsoka, Theodoros Theodosiou, Konstantia Papadopoulou, Katerina Tsikaloudaki. Assessing the Energy Performance of Prefabricated Buildings Considering Different Wall Configurations and the Use of PCMs in Greece. Energies. 2020; 13 (19):5026.
Chicago/Turabian StyleStella Tsoka; Theodoros Theodosiou; Konstantia Papadopoulou; Katerina Tsikaloudaki. 2020. "Assessing the Energy Performance of Prefabricated Buildings Considering Different Wall Configurations and the Use of PCMs in Greece." Energies 13, no. 19: 5026.
The increased rates of urbanization and industrialization of the 20th and 21st centuries have dramatically changed the land use and cover of modern cities, contributing to the degradation of the urban microclimate and the rise of the ambient urban air temperatures. Given the multiple negative energy, environmental and social consequences of urban warming, the present paper summarizes the findings of previous studies, assessing the main causes of the phenomenon along with the key investigation methods involving experimental and computational approaches. There follows a description of the most common mitigations, and adaption strategies towards the attenuation of urban warming are described. The analyzed elements include the addition of green spaces such as trees, grass and green roofs; changes on the albedo of the urban surfaces and water-based techniques, as well as a combination of them. The discussion of the reported findings in the existing literature clearly reflects the impact of urban morphology on the outdoor thermal environment, providing also useful information for professionals and urban planners involved at the phase of decision-making.
Stella Tsoka; Katerina Tsikaloudaki; Theodoros Theodosiou; Dimitrios Bikas. Urban Warming and Cities’ Microclimates: Investigation Methods and Mitigation Strategies—A Review. Energies 2020, 13, 1414 .
AMA StyleStella Tsoka, Katerina Tsikaloudaki, Theodoros Theodosiou, Dimitrios Bikas. Urban Warming and Cities’ Microclimates: Investigation Methods and Mitigation Strategies—A Review. Energies. 2020; 13 (6):1414.
Chicago/Turabian StyleStella Tsoka; Katerina Tsikaloudaki; Theodoros Theodosiou; Dimitrios Bikas. 2020. "Urban Warming and Cities’ Microclimates: Investigation Methods and Mitigation Strategies—A Review." Energies 13, no. 6: 1414.
Replacing conventional pavements with the corresponding high albedo ones constitutes a well-known technique to improve outdoor thermal environment of modern cites. Since most of the existing studies assess the impact of the high albedo pavements at the pedestrian’s height and with respect to thermal comfort, this study aims to examine the effect of the application of highly reflective pavements on the heating and cooling energy needs of a building unit, located inside a dense urban area. Aiming at a higher accuracy of the energy performance simulations, an integrated computational method between ENVI-met model, Meteonorm weather data generator and Energy Plus software is established, to consider the site-specific microclimatic characteristics of the urban areas. The analysis is performed both for the design and the aged albedo values as significant changes may occur due to aging process. The analysis revealed that the application of cool materials on the ground surfaces only marginally affects the energy performance of the examined building unit, both for the design and the aged albedo value; changes on the annual heating and cooling energy demand, for both albedo scenarios did not exceed 1.5% revealing the limited potential of cool pavements regarding the improvement of the energy performance of urban building units.
Stella Tsoka; Katerina Tsikaloudaki; Theodoros Theodosiou. Coupling a Building Energy Simulation Tool with a Microclimate Model to Assess the Impact of cool Pavements on the Building’s Energy Performance. Application in a Dense Residential Area. Sustainability 2019, 11, 2519 .
AMA StyleStella Tsoka, Katerina Tsikaloudaki, Theodoros Theodosiou. Coupling a Building Energy Simulation Tool with a Microclimate Model to Assess the Impact of cool Pavements on the Building’s Energy Performance. Application in a Dense Residential Area. Sustainability. 2019; 11 (9):2519.
Chicago/Turabian StyleStella Tsoka; Katerina Tsikaloudaki; Theodoros Theodosiou. 2019. "Coupling a Building Energy Simulation Tool with a Microclimate Model to Assess the Impact of cool Pavements on the Building’s Energy Performance. Application in a Dense Residential Area." Sustainability 11, no. 9: 2519.
Double-skin facades (DSFs) are a technology that lies behind innovative energy efficient facade systems. While it provides a potential for high energy efficient buildings, other important parameters, like point thermal bridge problems, are in most cases overlooked. The aim of this study is to investigate the magnitude of this approach and the effect it might has on the overall heat flow estimation in buildings. The study performs a numerical analysis of heat flow through the points where such effects are found, in order to analyse their nature under different design parameters selection like the use of thermal breaks, the substrate wall material, the thermal insulation thickness and the type of anchors used to securely connect both facade skins. The results are then applied to a case-study office building aiming at quantifying the overall contribution of point thermal bridges to heat flows through the building envelope. As the analysis shows, point thermal bridges in well-insulated envelopes have a heat-loss similar to the one from 1 m2 of facade’s wall. The overall effect at DSFs can surpass 25% of total envelope heat flow, leading to a large underestimation of actual heat flows through the building envelope. Overlooking their contribution, as many European national energy efficiency regulations currently do for the shake of simplicity, has a significant effect in widening the gap between predicted and actual energy efficiency of buildings.
Theodoros Theodosiou; Katerina Tsikaloudaki; Stella Tsoka; Panagiotis Chastas. Thermal bridging problems on advanced cladding systems and smart building facades. Journal of Cleaner Production 2019, 214, 62 -69.
AMA StyleTheodoros Theodosiou, Katerina Tsikaloudaki, Stella Tsoka, Panagiotis Chastas. Thermal bridging problems on advanced cladding systems and smart building facades. Journal of Cleaner Production. 2019; 214 ():62-69.
Chicago/Turabian StyleTheodoros Theodosiou; Katerina Tsikaloudaki; Stella Tsoka; Panagiotis Chastas. 2019. "Thermal bridging problems on advanced cladding systems and smart building facades." Journal of Cleaner Production 214, no. : 62-69.
Increased urban air temperatures due to urbanization affect the buildings’ energy performance and the outdoor thermal comfort. Aiming on the establishment of adaption strategies, urban microclimate studies using numerical simulation tools are gaining great scientific attention. The ENVI-met model is one of the most widely employed dynamic simulation tools. Considering its increasing use, this review aims to perform a meta-analysis of the reported evaluation results, reflecting the capability of the model to accurately calculate the diurnal profile of microclimatic variables. The analysis relies on the definition of the range of the reported metrics and on the investigation of the relationship between the various indices, applied for the model evaluation. Secondly, the study assesses the existing ENVI-met simulation results, indicating the cooling potential of urban greenery and cool materials regarding air, surface and mean radiant temperature modifications. The analysis revealed that the model can be considered as a helpful tool for urban climate analysis, provided that its limitations and features are accounted for by the user during the interpretation of the simulation outcome. Concerning the performance of the examined mitigation strategies, the most popular technology is the urban greenery while the mitigation potential is increased when different strategies are combined.
S. Tsoka; Katerina Tsikaloudaki; T. Theodosiou. Analyzing the ENVI-met microclimate model’s performance and assessing cool materials and urban vegetation applications–A review. Sustainable Cities and Society 2018, 43, 55 -76.
AMA StyleS. Tsoka, Katerina Tsikaloudaki, T. Theodosiou. Analyzing the ENVI-met microclimate model’s performance and assessing cool materials and urban vegetation applications–A review. Sustainable Cities and Society. 2018; 43 ():55-76.
Chicago/Turabian StyleS. Tsoka; Katerina Tsikaloudaki; T. Theodosiou. 2018. "Analyzing the ENVI-met microclimate model’s performance and assessing cool materials and urban vegetation applications–A review." Sustainable Cities and Society 43, no. : 55-76.
Aiming at the improvement of a dense urban area’s microclimatic conditions, this study examines by simulation means, the application of highly reflective materials as a mitigation strategy. Yet, as significant albedo changes may occur due to weathering and aging, the study investigates the surface (Tsurf) and air (Tair) temperature cooling potential of cool paving materials, both for design and aged values of solar reflectance; the aged albedo values are issued from previously reported experimental campaigns. Since the majority of the existing studies evaluate the cool materials impact at the pedestrian’s height, the current work aims to provide insight on the vertical profile of the achieved Tair reduction due to cool pavements, at different heights of the study area canyons. The analysis revealed that the Tsurf and Tair decrease due to cool pavements is reduced by 50%, when the aged albedo values are considered while the obtained Tair reduction is negatively related to the distance from the ground. The accurate assessment of the high albedo materials’ effect on the urban microclimate imposes thus the consideration of the albedo degradation due to weathering and aging while extra effort should be given on the development of cold materials standing the test of time.
S. Tsoka; Theodoros Theodosiou; Katerina Tsikaloudaki; F. Flourentzou. Modeling the performance of cool pavements and the effect of their aging on outdoor surface and air temperatures. Sustainable Cities and Society 2018, 42, 276 -288.
AMA StyleS. Tsoka, Theodoros Theodosiou, Katerina Tsikaloudaki, F. Flourentzou. Modeling the performance of cool pavements and the effect of their aging on outdoor surface and air temperatures. Sustainable Cities and Society. 2018; 42 ():276-288.
Chicago/Turabian StyleS. Tsoka; Theodoros Theodosiou; Katerina Tsikaloudaki; F. Flourentzou. 2018. "Modeling the performance of cool pavements and the effect of their aging on outdoor surface and air temperatures." Sustainable Cities and Society 42, no. : 276-288.
This paper investigates the public and professional attitudes towards an innovative energy efficient façade refurbishment system, in Mediterranean countries, including Greece, Italy and Spain. Two types of multiple choice questionnaires were developed and addressed to two different target groups: building professionals and users. The survey questionnaire was created so as to elicit information on the interviewee’s background and explore attitudes and perceptions towards the proposed system. Results signify that both potential users and professionals are generally positive towards the system’s energy performance; however, the increased cost of acquisition, maintenance issues and the replacement of natural ventilation by mechanical means consist significant constraints that induce hesitations for the users. Professionals are willing to apply a ventilated façade in a future project but the lack of the corresponding knowledge may be an important obstacle to face.
Stella Tsoka; Katerina Tsikaloudaki; Theodoros Theodosiou; Antoine Dugue. Rethinking user based innovation: Assessing public and professional perceptions of energy efficient building facades in Greece, Italy and Spain. Energy Research & Social Science 2018, 38, 165 -177.
AMA StyleStella Tsoka, Katerina Tsikaloudaki, Theodoros Theodosiou, Antoine Dugue. Rethinking user based innovation: Assessing public and professional perceptions of energy efficient building facades in Greece, Italy and Spain. Energy Research & Social Science. 2018; 38 ():165-177.
Chicago/Turabian StyleStella Tsoka; Katerina Tsikaloudaki; Theodoros Theodosiou; Antoine Dugue. 2018. "Rethinking user based innovation: Assessing public and professional perceptions of energy efficient building facades in Greece, Italy and Spain." Energy Research & Social Science 38, no. : 165-177.
Predicting buildings’ heating and cooling needs through dynamic simulation methods requires the input of hourly weather data, so as to represent the typical meteorological characteristics of a specific location. Hence, the so called ‘typical weather years’ (TWY), mainly deduced from multi-year records of meteorological stations outside the urban centres, cannot account of the complex interactions between solar radiation, wind speed and high urban densities which lead to the formation of the urban heat island effect and to higher ambient air temperatures. As the assumption that climatic parameters at a reference location of a meteo station are similar for a densely built up area can lead to miscalculations of the heating and cooling needs, the aim of this study is to present a computational method for assessing the urban climate's effect during the generation of typical weather data for dynamic energy calculations. In this vein, a typical ‘urban specific weather dataset’ (USWD), reflecting the microclimatic conditions in front of a building unit inside an urban district in the city of Thessaloniki, Greece is created based on microclimate simulations with the Envi-met model; it is then compared with a typical reference weather dataset (RWD), representing climatic conditions at a reference location of a meteo station. The results indicate that the proposed method can capture microclimate characteristics; higher dry bulb temperatures were reported during the year inside the urban canyon, compared to the corresponding values at the reference location, with indicative mean daily deviations up to 1.0 °C and 0.75 °C in February and July respectively. Wind speed, near the building façade is generally found lower than the corresponding values at the reference location, due to wind sheltering by neighbouring constructions. Given that climatic parameters strongly influence the output of energy simulations the proposed computational method provide a contribution for higher accuracy of building energy simulation in the urban context. Future work will involve energy performance simulations of a typical building unit with the generated USWD file so as to evaluate the urban climate's influence on energy needs.
S. Tsoka; K. Tolika; Theodoros Theodosiou; Katerina Tsikaloudaki; D. Bikas. A method to account for the urban microclimate on the creation of ‘typical weather year’ datasets for building energy simulation, using stochastically generated data. Energy and Buildings 2018, 165, 270 -283.
AMA StyleS. Tsoka, K. Tolika, Theodoros Theodosiou, Katerina Tsikaloudaki, D. Bikas. A method to account for the urban microclimate on the creation of ‘typical weather year’ datasets for building energy simulation, using stochastically generated data. Energy and Buildings. 2018; 165 ():270-283.
Chicago/Turabian StyleS. Tsoka; K. Tolika; Theodoros Theodosiou; Katerina Tsikaloudaki; D. Bikas. 2018. "A method to account for the urban microclimate on the creation of ‘typical weather year’ datasets for building energy simulation, using stochastically generated data." Energy and Buildings 165, no. : 270-283.
Urban sustainability has been connected to form and compactness of the urban tissue. At the same time the relationship between urban form and energy efficiency is strongly affected by climate. This paper investigates the effect of climate conditions on the relation between urban morphology and energy efficiency of urban blocks, focusing on the Greek city context. A set of building block typologies is analyzed with regard to their form factors such as S/V ratio, coverage ratio and building ratio for the climatic conditions of two cities, each one belonging to a different climatic zone. Heating and cooling loads are calculated at an urban block scale for the climate of the city of Thessaloniki (zone C) and of the city of Heraklion (zone A) in order to draw conclusions about the relation between geometry factors and energy efficiency. The results of the research indicate that there is a strong relationship between urban morphology factors and energy efficiency and that the total load demand of urban blocks can be described as a function of form parameters. Results of the research, concerning the energy demand calculation, are valuable since they indicate the energy profile of each typology according to climate and can be used for defining different urban strategies towards sustainability in a context-based climate dependent analysis.
Dimitra Tsirigoti; Katerina Tsikaloudaki. The Effect of Climate Conditions on the Relation between Energy Efficiency and Urban Form. Energies 2018, 11, 582 .
AMA StyleDimitra Tsirigoti, Katerina Tsikaloudaki. The Effect of Climate Conditions on the Relation between Energy Efficiency and Urban Form. Energies. 2018; 11 (3):582.
Chicago/Turabian StyleDimitra Tsirigoti; Katerina Tsikaloudaki. 2018. "The Effect of Climate Conditions on the Relation between Energy Efficiency and Urban Form." Energies 11, no. 3: 582.
Electricity generation on site is a design challenge aiming at supporting the concept of energy-autonomous building. Many projects worldwide have promoted the installation of photovoltaic panels on urban buildings, aiming at utilizing a large area to produce electricity. In most cases, photovoltaics are considered strictly as electricity generators, neglecting their effect to the efficiency and to the thermal behaviour of the building envelope. The integrated performance of PV ventilated facades, where the photovoltaics are regarded as part of a complicated envelope system, provides design challenges and problems that cannot be overlooked within the framework of the ‘Nearly Zero Energy Building’ concept. In this study,a finite volume model for photovoltaic ventilated facades is developed, experimentally validated and found to have a significant convergence to measured data.
Konstantinos Ordoumpozanis; Theodoros Theodosiou; Dimitrios Bouris; Katerina Tsikaloudaki. Energy and thermal modeling of building façade integrated photovoltaics. Thermal Science 2018, 22, 921 -932.
AMA StyleKonstantinos Ordoumpozanis, Theodoros Theodosiou, Dimitrios Bouris, Katerina Tsikaloudaki. Energy and thermal modeling of building façade integrated photovoltaics. Thermal Science. 2018; 22 (Suppl. 3):921-932.
Chicago/Turabian StyleKonstantinos Ordoumpozanis; Theodoros Theodosiou; Dimitrios Bouris; Katerina Tsikaloudaki. 2018. "Energy and thermal modeling of building façade integrated photovoltaics." Thermal Science 22, no. Suppl. 3: 921-932.
Stella Tsoka; Katerina Tsikaloudaki; Theodoros Theodosiou. Urban space’s morphology and microclimatic analysis: A study for a typical urban district in the Mediterranean city of Thessaloniki, Greece. Energy and Buildings 2017, 156, 96 -108.
AMA StyleStella Tsoka, Katerina Tsikaloudaki, Theodoros Theodosiou. Urban space’s morphology and microclimatic analysis: A study for a typical urban district in the Mediterranean city of Thessaloniki, Greece. Energy and Buildings. 2017; 156 ():96-108.
Chicago/Turabian StyleStella Tsoka; Katerina Tsikaloudaki; Theodoros Theodosiou. 2017. "Urban space’s morphology and microclimatic analysis: A study for a typical urban district in the Mediterranean city of Thessaloniki, Greece." Energy and Buildings 156, no. : 96-108.
Athina G. Gaglia; Aikaterini G. Tsikaloudaki; Costantinos M. Laskos; Evangelos N. Dialynas; Athanassios A. Argiriou. The impact of the energy performance regulations’ updated on the construction technology, economics and energy aspects of new residential buildings: The case of Greece. Energy and Buildings 2017, 155, 225 -237.
AMA StyleAthina G. Gaglia, Aikaterini G. Tsikaloudaki, Costantinos M. Laskos, Evangelos N. Dialynas, Athanassios A. Argiriou. The impact of the energy performance regulations’ updated on the construction technology, economics and energy aspects of new residential buildings: The case of Greece. Energy and Buildings. 2017; 155 ():225-237.
Chicago/Turabian StyleAthina G. Gaglia; Aikaterini G. Tsikaloudaki; Costantinos M. Laskos; Evangelos N. Dialynas; Athanassios A. Argiriou. 2017. "The impact of the energy performance regulations’ updated on the construction technology, economics and energy aspects of new residential buildings: The case of Greece." Energy and Buildings 155, no. : 225-237.
Stella Tsoka; Kostantia Tolika; Theodoros Theodosiou; Katerina Tsikaloudaki. Evaluation of stochastically generated weather datasets for building energy simulation. Energy Procedia 2017, 122, 853 -858.
AMA StyleStella Tsoka, Kostantia Tolika, Theodoros Theodosiou, Katerina Tsikaloudaki. Evaluation of stochastically generated weather datasets for building energy simulation. Energy Procedia. 2017; 122 ():853-858.
Chicago/Turabian StyleStella Tsoka; Kostantia Tolika; Theodoros Theodosiou; Katerina Tsikaloudaki. 2017. "Evaluation of stochastically generated weather datasets for building energy simulation." Energy Procedia 122, no. : 853-858.
This paper presents a feasibility analysis for the installation of ground source heat pump systems in Cyprus. Two reference buildings, a single- and a multi-family one, are designed and analyzed using the EnergyPlus software, in order to calculate their energy needs for heating and cooling for the climate conditions of Cyprus, one of the warmest areas in Southern Europe. These energy needs are assumed to be covered by the conventional heating and cooling systems that are most widely used in Cyprus or alternatively by a ground source heat pump system, which consists of a vertical ground heat exchanger and water-to-water heat pumps and is analyzed using an in-house developed and validated code. Primary energy consumption and the resulting CO2 emissions for both the conventional and the alternative systems are calculated and compared. Results show that the installation of the ground source heat pump system achieves in most cases substantial reductions in primary energy use for both types of buildings. As regards carbon emissions, the findings are less clear: Emissions of the geothermal system are higher than those of the conventional system for the single-family building but considerably lower for the multi-family one. From an economic perspective, the geothermal system compares favorably with the conventional systems in many cases, particularly for the multi-family building.
A. Michopoulos; V. Voulgari; Katerina Tsikaloudaki; Th. Zachariadis. Evaluation of ground source heat pump systems for residential buildings in warm Mediterranean regions: the example of Cyprus. Energy Efficiency 2016, 9, 1421 -1436.
AMA StyleA. Michopoulos, V. Voulgari, Katerina Tsikaloudaki, Th. Zachariadis. Evaluation of ground source heat pump systems for residential buildings in warm Mediterranean regions: the example of Cyprus. Energy Efficiency. 2016; 9 (6):1421-1436.
Chicago/Turabian StyleA. Michopoulos; V. Voulgari; Katerina Tsikaloudaki; Th. Zachariadis. 2016. "Evaluation of ground source heat pump systems for residential buildings in warm Mediterranean regions: the example of Cyprus." Energy Efficiency 9, no. 6: 1421-1436.
Cladding systems have become an attractive solution in energy renovation of existing buildings since they combine multiple benefits. In such systems, the use of a metallic frame and brackets, which penetrates the thermal insulation layer, creates point thermal bridges that are usually neglected by thermal insulation regulations due to their calculation complexity and their supposed small magnitude in overall heat losses. The objective of this study is to perform a parametric analysis to quantify the magnitude of this thermal bridging effect. All necessary calculations are performed using a detailed 3-dimensional numerical analysis approach in order to overcome oversimplifications found in most thermal bridge estimation methods. Results of the analysis are applied in a refurbishment study of an existing office building in order to underline the significance of the problem under investigation, in practice. As it is shown, point thermal bridge effects in cladding systems can constitute a significant part of buildings’ thermal balance. Neglecting their presence can lead to significant underestimation of actual heat flows which can account for 5% to almost 20% of total heat flows through the building envelope, depending mostly on the thermal transmittance of the load bearing wall and the ventilation characteristics of the air cavity.
Theodoros G. Theodosiou; Aikaterini G. Tsikaloudaki; Karolos J. Kontoleon; Dimitrios K. Bikas. Thermal bridging analysis on cladding systems for building facades. Energy and Buildings 2015, 109, 377 -384.
AMA StyleTheodoros G. Theodosiou, Aikaterini G. Tsikaloudaki, Karolos J. Kontoleon, Dimitrios K. Bikas. Thermal bridging analysis on cladding systems for building facades. Energy and Buildings. 2015; 109 ():377-384.
Chicago/Turabian StyleTheodoros G. Theodosiou; Aikaterini G. Tsikaloudaki; Karolos J. Kontoleon; Dimitrios K. Bikas. 2015. "Thermal bridging analysis on cladding systems for building facades." Energy and Buildings 109, no. : 377-384.
Katerina Tsikaloudaki; Konstantinos Laskos; Theodoros Theodosiou; Dimitrios Bikas. The energy performance of windows in Mediterranean regions. Energy and Buildings 2015, 92, 180 -187.
AMA StyleKaterina Tsikaloudaki, Konstantinos Laskos, Theodoros Theodosiou, Dimitrios Bikas. The energy performance of windows in Mediterranean regions. Energy and Buildings. 2015; 92 ():180-187.
Chicago/Turabian StyleKaterina Tsikaloudaki; Konstantinos Laskos; Theodoros Theodosiou; Dimitrios Bikas. 2015. "The energy performance of windows in Mediterranean regions." Energy and Buildings 92, no. : 180-187.
Dimitrios Bikas; Katerina Tsikaloudaki; Konstantinos Laskos. Energy rating of windows for the cooling season: a proposal for Europe. International Journal of Sustainable Building Technology and Urban Development 2014, 5, 277 -285.
AMA StyleDimitrios Bikas, Katerina Tsikaloudaki, Konstantinos Laskos. Energy rating of windows for the cooling season: a proposal for Europe. International Journal of Sustainable Building Technology and Urban Development. 2014; 5 (4):277-285.
Chicago/Turabian StyleDimitrios Bikas; Katerina Tsikaloudaki; Konstantinos Laskos. 2014. "Energy rating of windows for the cooling season: a proposal for Europe." International Journal of Sustainable Building Technology and Urban Development 5, no. 4: 277-285.
A. Michopoulos; V. Skoulou; V. Voulgari; A. Tsikaloudaki; N.A. Kyriakis. The exploitation of biomass for building space heating in Greece: Energy, environmental and economic considerations. Energy Conversion and Management 2014, 78, 276 -285.
AMA StyleA. Michopoulos, V. Skoulou, V. Voulgari, A. Tsikaloudaki, N.A. Kyriakis. The exploitation of biomass for building space heating in Greece: Energy, environmental and economic considerations. Energy Conversion and Management. 2014; 78 ():276-285.
Chicago/Turabian StyleA. Michopoulos; V. Skoulou; V. Voulgari; A. Tsikaloudaki; N.A. Kyriakis. 2014. "The exploitation of biomass for building space heating in Greece: Energy, environmental and economic considerations." Energy Conversion and Management 78, no. : 276-285.