Eleftheria AlexandriHellenic Open University · School of Science and Technology
Eleftheria Alexandri
About
38
Publications
27,288
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1,340
Citations
Introduction
Additional affiliations
October 2011 - September 2015
Position
- Lecturer
Description
- Lecturer in the University of Patras, Department of Architecture, on the module “Sustainable Design I” and “Sustainable Design II”. Dissertation and assessment supervisions.
October 2013 - present
Position
- Lecturer
Description
- Lecturer in the Hellenic Open University, post graduate course Environmental Design of Cities and Buildings, on the module “Design, Environmental Impacts and Evaluation Methods”. Dissertation supervisions.
October 2010 - May 2014
British-Hellenic College
Position
- Lecturer
Description
- civil engineering: “Environmental Engineering”, “Construction Materials”, “Survey and Measurement”, “Geotechnical properties and construction methods”, architecture: “Sustainable Construction”, “Strength of Materials”, “Construction Technology”
Publications
Publications (38)
![Figure 5. GHG emission factors for electricity, existing ([15] for...](publication/371883593/figure/fig3/AS:11431281170703853@1687871590451/GHG-emission-factors-for-electricity-existing-15-for-years-2014-2020-and-16-for_Q320.jpg)
This paper examines whether carbon neutrality of a city like Athens could be an achievable target, concentrating on energy induced greenhouse gas emissions. The main focus is on buildings, but the trends in transport are also investigated. Taking into consideration these examined trends, emphasis is given on technologies that have been put forward...
Background: This paper examines the hierarchy of technologies for a sustainable mitigation of greenhouse gas emissions from the building sector in the City of Athens. The greenhouse gas inventory of the building stock of the city and its energy consumption is investigated, pinpointing to effective energy saving scenarios, in which available in the...
Most contemporary Greek cities face the lack of adequate public space. This lack has a direct effect on parking space issues, turning cities’ open spaces into congested ones with parked cars. Although, according to Greek buildings’ regulations parking space must be provided within the building itself, especially in the county of Attica, where Athen...
The aim of this paper is to explore the contribution of ecolabel HVAC systems, which are already available in the market, to the energy upgrade of existing dwellings, placing emphasis on whether they can constitute an efficient means of dealing with energy poverty. For this reason, the effects of these systems, when placed on an existing detached d...
The effect of HVAC systems, defined by their certification on environmental and energy criteria, on the energy classification of buildings is examined in this paper. The aim of this study is to explore the contribution of energy efficient HVAC systems that are already available in the market and their efficiency regarding energy savings in existing...
In this publication, the methodology and the results of examining the urban – intelligent interconnected digital landscape, from the point of view of energy efficiency, resilience and interaction is presented, thus focusing on the sustainable design of public spaces and more specifically of urban squares. In this way, the transition from today conv...
In this paper the rationale of the bioclimatic regeneration of part of the commercial triangle of Athens is presented. In this 11 ha area, identified by three streets in the form of a triangle, the most vivid commercial activities have been taking place, from the transformation of Athens into a capital city in the 19th century, up to late 20th cent...
When energy upgrade measures are suggested for existing buildings, usually the market availability of the selected technology, in relation to costs are taken into consideration; the latter are usually expressed as the investment payback period, in relation to the savings from energy bills that are achieved. Yet, the embodied energy payback period i...
This chapter is about the methodology of teaching Assembly for Disassembly to fourth year undergraduate architecture students within the module of sustainable design. When designing a sustainable building one should take into consideration the fact that the building is going to be demolished at some point; thus components should be assembled in suc...
This paper focuses on the Indoor Environmental Quality (IEQ) of school buildings and its impact on the health and well-being of the building's occupants (students and teachers). Determining the levels of IEQ is a rather complex and partly subjective process, which involves setting and measuring a number of environmental parameters (such as temperat...
As nearly Zero Energy Buildings (nZEB) are a mandatory requirement of EU legislation for new buildings (Directive 2010/31/EU), this paper explores the possibility of transforming existing buildings into nZEB ones. The available energy upgrade techniques are explored in three buildings in Greece, taking into consideration their embodied energy, so a...
Στο πόνημα ετούτο, οι χωρικές αλλαγές και επιπτώσεις της κρίσης μελετώνται σε περιοχή του εμπορικού τριγώνου στο κέντρο του Δήμου Αθηναίων, σε συνάρτηση με τις πολεοδομικές επεμβάσεις των προηγούμενων δεκαετιών στην περιοχή, εστιάζοντας κυρίως στους κοινόχρηστους χώρους. Η περιοχή μελέτης του εμπορικού τριγώνου (μεταξύ των οδών Αθηνάς / Αγίας Ειρήν...
This paper is about the experience of teaching Assembly for Disassembly to fourth year architect students within the module of sustainable design. When designing a sustainable building one should take into consideration the fact that the building is going to be demolished in some years; thus the materials should be assembled in such a way so that t...
Urban temperatures are generally greater than in their suburban and surrounding rural areas. This phenomenon, especially for cities of the South, in hot climates tends to be larger in summer. The raised temperatures due to the urban fabric make urban life more uncomfortable in open spaces in the city centre during summer period. A research was carr...
The inhabitants’ energy consumption habits within a building can affect energy consumption dramatically, regardless of the energy conservation rationale of a building. Research has shown that energy efficient buildings might finally end up consuming a lot of energy, due to inhabitants without any energy efficiency life style, while uninsulated buil...
In 2009 a national programme for energy efficiency at municipal level targeted to municipalities of over 10.000 inhabitants was launched by the Greek State. The programme, designed by CRES in cooperation with the Central Union of Municipalities of Greece, is entitled “EXOIKONOMO” (“I CONSERVE”) and funds 70% of energy efficiency interventions cover...
The regeneration of public spaces of cities is a major issue, as multiple factors have to be taken into consideration; aesthetics and attractiveness of the area, accessibility by all population groups (especially by elder and disabled), local mitigation of urban temperatures in summer, increase of vegetated surfaces, use of eco-friendly materials,...
Στην παρούσα δημοσίευση διερευνάται το θερμικό αποτέλεσμα των φυτεμένων δωμάτων και τοίχων στο δομημένο περιβάλλον ως επίλυση του φαινομένου θερμικής νήσου. Η μελέτη γίνεται με τη χρήση ενός δυναμικού, δισδιάστατου μοντέλου μεταφοράς θερμότητας και μάζας, το οποίο έχει επιβεβαιωθεί με πειραματική διάταξη. Μ’ αυτόν τον τρόπο εκτιμάται ποσοτικά για δ...
Energy savings in the building sector has been a priority of the European Union over the last decade, and many measures have been set up to decrease a building’s energy needs and gas emissions to the environment. Office buildings have characteristically high consumption for heating and especially for cooling, due to their high internal gains. Addit...
Η εφαρμογή μέτρων εξοικονόμησης ενέργειας σε σχολικά κτίρια παρουσιάζει μεγάλο ενδιαφέρον, λόγω της ιδιαίτερης χρήσης και τυπολογίας των σχολικών κτιρίων. Καθώς πρόκειται για κτίρια με συγκεκριμένο ωράριο λειτουργίας, τόσο σε εβδομαδιαία, όσο και σε εποχιακή βάση, και με συγκεκριμένες καταναλώσεις, η μείωση της κατανάλωσης ενέργειας στα σχολικά κτί...
Σε αυτό το άρθρο εξετάζεται κατά πόσο θα μπορούσε να μετριαστεί το φαινόμενο θερμικής νήσου στην Αθήνα, εάν τα κτιριακά κελύφη στο κέντρο της πόλης καλύπτονταν με χαμηλή βλάστηση (φυτεμένα δώματα και φυτεμένες όψεις). Για να εξεταστεί αυτό το φαινόμενο, αναπτύχθηκε ένα δισδιάστατο, μικροκλιματικό μοντέλο μεταφοράς θερμότητας και μάζας, το οποίο συγ...
Η εφαρμογή μέτρων εξοικονόμησης ενέργειας σε ιστορικά κτίρια παρουσιάζει μεγάλο ενδιαφέρον, λόγω των ιδιαίτερων χαρακτηριστικών τους, όπως η αρχιτεκτονική τους μορφή, η τυπολογία και η παλαιότητα της κατασκευής τους, ο περιορισμός των δυνατοτήτων επεμβάσεων επί των όψεών τους, η ιδιαίτερη χρήση και λειτουργία τους. Εξετάζοντας ένα ιστορικό κτίριο ε...
Energy audit of a building is a systematic procedure which aims to evaluate the building’s existing energy consumption, to identify the potential energy savings and to report the findings. It is an important tool which can be used to implement energy efficiency measures and achieve energy conservation in the building sector together with extension...
This paper discusses the thermal effect of covering the building envelope with vegetation on the microclimate in the built environment, for various climates and urban canyon geometries. A two-dimensional, prognostic, micro scale model has been used, developed for the purposes of this study. The climatic characteristics of nine cities, three urban c...
This paper investigates the mathematical modelling of the effect of green roofs on mitigating raised urban temperatures. A dynamic, one-dimensional model is developed, describing heat and mass transfer in building materials, considered as capillary-porous bodies, the vegetated canopy, modelled as a combined plant–air canopy layer, the soil and the...
In this article solutions are sought for turning cities into more sustainable spaces, by mitigating their heat island effect. The factors which affect the formation of the heat island effect are discussed briefly, followed by the solutions proposed by the 20th century visions of the utopian cities. With vegetation being a key factor in all 20th cen...
![Figure 5: Roof surface temperature for the plain concrete roof [con],...](profile/Phil-Jones-4/publication/238661340/figure/fig2/AS:669486965342212@1536629539145/Roof-surface-temperature-for-the-plain-concrete-roof-con-the-white-coated-concrete_Q320.jpg)
In this paper the effect of vegetation, water and high-albedo coating on the mitigation of raised urban temperatures are examined. With the hypothesis that raised urban temperatures are mostly formed by the high heat capacity and absorptivity building materials, this paper looks into the thermal effect of covering these surfaces with materials whic...
In this paper the thermal effect of green roofs and green walls on the built environment is investigated. With the use of a prognostic, two-dimensional heat and mass transfer model, the effect of covering the building envelope with vegetation on lowering the raised temperatures of the built environment is explored, taking into consideration the eff...
In this paper the effect of vegetation, water and high albedo of materials is examined in the built environment. The high capacity and low albedo urban building materials are mostly responsible for the formation of raised urban temperatures. If these materials are covered with materials of low heat capacity and high albedo, this phenomenon of exces...
In general cities, and especially cities in hot zones, as the Mediterranean, suffer from raised temperatures in the city core, generally known as the heat island effect. Raised temperatures, especially in summer, may turn city centres into unwelcome hot areas, with direct effects on energy consumption for cooling buildings and morbidity and mortali...
This paper examines the potential of plants on building surfaces for mitigating the heat island effect for different climates and urban geometries. Climatic factors, such as temperature, relative humidity, wind speed and solar radiation play a crucial role in the effect which plants have on lowering urban temperatures. Based on Koeppen’s climatic c...
This paper presents the comparison between heat transfer and heat and mass transfer for thermal simulation in buildings, focusing on air temperature. Two sets of algorithms have been developed; one describing heat transfer and one describing heat and mass transfer. The results from these two sets of algorithms are compared with the results from an...
This paper investigates quantitatively the thermal effect of plants in the formation of the urban canyon microclimate. Through this theoretic work an attempt is done to indicate whether covering building surfaces (roofs and walls) in existing urban environments with vegetation could be a realistic proposal for the mitigation of raised urban tempera...
This paper explores theoretically the thermal effects of green roofs on the built environment at micro-scale. Two models have been developed; one describing temperature distributions based on heat transfer algorithms and one describing the temperature and humidity distribution based on heat and mass transfer algorithms. A comparison has been made b...
This paper presents the idea of heating water for domestic use through a very simple solar collector, a black pipe. Although it does not have the same efficiency as a solar collector its advantage is that it is very easy and not expensive to construct, therefore it is much more attractive economically to people. After developing the equations which...
This paper investigates how green roofs and generally vegetation on building's surfaces can mitigate the heat island effect. The study is done theoretically, through a Computational Fluid Dynamics software, PHOENICS, with the use of a module which represents the city of Athens, Greece, with climatic data of July. Vegetation is modelled as "heat sin...
Questions
Questions (2)
I am working on 'carbon neutral' lately and I have some issues with the term; I think 'fossil-fuel free' or 'zero carbon emissions' describe moving away from fossil fuel economy more earnestly. 'Carbon neutral' incorporates 'balancing' carbon emissions, which seems to me like 'creative' accounting, which might be disasterous for the respective action plans and for our planet.
Apart from that, asking from a human being (or, generally, a mamal) to stay 'neutral' regarding carbon, is like asking him/her to move away from food or breathing: impossible.
Am I the only one who is losing her sleep over the issue?
Αντικείμενο της εργασίας του κου Τσιλιγιάννη, του οποίου τη διπλωματική εργασία έχω την τύχη και χαρά να επιβλέπω στο ΕΑΠ, είναι το πώς αντιλαμβανόμαστε τα φυτά εσωτερικού χώρου και το τι πραγματικά προσφέρουν στο εσωτερικό χώρο.
Για την απάντηση του α' μέρους έχει συνταχθεί το ερωτηματολόγιο που βρίσκεται στην ιστοσελίδα:
https://docs.google.com/forms/d/e/1FAIpQLSfJ4E_pSBsC-gaXHo_PgJNaj02FyqjlV492tjrNgdMNiXc87A/viewform
και παίρνει λιγότερο από 3 λεπτά για τη συμπλήρωσή του.
Σας ευχαριστώ πολύ για το χρόνο σας!
Ελευθερία Αλεξανδρή
