scholarly journals Identification of Cost-Optimal Measures for Energy Renovation of Thermal Envelopes in Different Types of Public School Buildings in the City of Valencia

2021 ◽  
Vol 11 (11) ◽  
pp. 5108
Author(s):  
María Esther Liébana-Durán ◽  
Begoña Serrano-Lanzarote ◽  
Leticia Ortega-Madrigal

In order to achieve the EU emission reduction goals, it is essential to renovate the building stock, by improving energy efficiency and promoting total decarbonisation. According to the 2018/844/EU Directive, 3% of Public Administration buildings should be renovated every year. So as to identify the measures to be applied in those buildings and obtain the greatest reduction in energy consumption at the lowest cost, the Directive 2010/31/EU proposed a cost-optimisation-based methodology. The implementation of this allowed to carry out studies in detail in actual scenarios for the energy renovation of thermal envelopes of public schools in the city of Valencia. First, primary school buildings were analysed and classified into three representative types. For each type, 21 sets of measures for improving building thermal envelopes were proposed, considering the global cost, in order to learn about the savings obtained, the repayment term for the investment made, the percentage reduction in energy consumption and the level of compliance with regulatory requirements. The result and conclusions will help Public Administration in Valencia to draw up an energy renovation plan for public building schools in the city.

2009 ◽  
Vol 4 (3-4) ◽  
pp. 186-190
Author(s):  
István Deák

The biggest dilemma of the Hungarian public administration, state administration nowadays is the future of the medium level administration. There are fierce debates in scientific and political circles about whether the county strengthened in its competencies should fill this position or the region functionning not always satisfactorily in the field of the territorial development. The picture is compleated by the theory of the „big county system" reappearing from time to time in scientific literature. The European spatial development and the appareance of the „city regions" lead to different solutions and development strategies in the member states of the EU. In Hungary, there has no step forward yet. The competencies, tasks of the „small regions" need to be clarified, only ad-hoc solutions were born depending on the political circumstancies without any conceptions in the long run.


2010 ◽  
Vol 16 (4) ◽  
pp. 567-576 ◽  
Author(s):  
Jorge S. Carlos ◽  
Helena Corvacho

A study on thermal retrofit of Portuguese elementary school buildings is presented. The type of school under analysis is one adopted by a large construction campaign that began in the 1940's. This building stock has a very poor thermal performance and their retrofit was evaluated starting with a case study of a school in the central region of Portugal, where some experimental measures were performed and a calculation method was applied for the heating energy consumption estimation. A solution for the thermal retrofit of the school building external envelope was optimized and the effect on heating energy consumption was evaluated, using ECOTECT, resulting in a reduction of 52% of heating energy needs. The national impact of the thermal retrofit of the whole building stock was characterised in terms of energy savings. Finally, the pre‐heating of the ventilation air was also tested as a complementary measure and its effect evaluated. The solution tested may provide up to 1000 kWh/year of extra heat gains by pre‐heating the ventilation air. It must be underlined though that the performance of these systems is dependent on the thermal properties of their components so higher reductions can be achieved with the improvement of these properties. Santrauka Straipsnyje pateikiami Portugalijos pradines mokyklos šiluminio atnaujinimo tyrimai. Analizuojamos mokyklos tipas yra vienas iš taikytu po 1940 metu prasidejusioje plačioje statybos kampanijoje. Šios pastatu grupes šilumines charakteristikos yra labai prastos. Ju atnaujinimo vertinimas buvo pradetas nuo centrineje Portugalijoje esančios mokyklos, kurioje buvo igyvendintos kai kurios eksperimentines priemones, ir energijos sanaudoms nustatyti pritaikytas skaičiavimo metodas. Pastato išoriniu atitvaru šiluminio atnaujinimo sprendimas buvo optimizuotas ir jo itaka šilumines energijos sanaudoms nustatyta naudojant ECOTECT. Šilumines energijos poreikis sumažejo 52 %. Iš viso pastatu fondo šiluminio atnaujinimo itaka nacionaliniu mastu vertinta sutaupytos energijos kiekiu. Pabaigoje kaip papildoma priemone buvo išbandytas pirminis vedinamo oro pašildymas, nustatytas jo naudingumas. Išbandytasis pirminis vedinamo oro pašildymas gali suteikti iki 1000 kWh/metus papildomo išsiskiriančio šilumos kiekio. Pabrežtina, kad nors šiu sistemu veikimo charakteristikos priklauso nuo ju komponentu šiluminiu savybiu, gerinant šias savybes galima daugiau sumažinti energijos sanaudu.


2012 ◽  
Vol 433-440 ◽  
pp. 5821-5827
Author(s):  
Hafsa Al Omari ◽  
E. Luma Al Dabbagh

The green building or green architecture has come to light as a strong architectural movement at the end of 1990's and as a main trend in architectural practice. The architectural green is a modern architectural philosophy which deals with the competent relationship between the functional constructive systems and its vital environmental, by controlling the inputs and outputs of this system with the least negative effects on the environment and occupant's health, and the least energy consumption during the various stages of the building ( construction, operation, maintenance and destruction ) to achieve the functional activities and the inventive and efficient architectural structures. The importance of this movement lies in trying to achieve the sustainable development in its environmental, social and economic aspects because of the problems that developed and developing countries ( e.g. Iraq ) face such as energy consumption and pollution. Several international standards of different classifications, depending on local context of each country, has been appeared. Some of these tools are (BREEAM, LEED, CO-CHPS Colorado, GBTool, CASBEE) which aim to assess the performance of the building from green Architecture's perspective. Although there is a similarity in the classification levels including the sustainable location, how to use (water, energy and atmosphere, materials, resources) effectively, indoor environment quality and the design's innovation, they differ in other aspects that its importance relies on the environmental and local context. The problem of our research was the absence of the practical evaluation tool of the green building ( school buildings ) for the Iraq's local context in general and Mosul in particular, compatibly with the city climate. The research aims at making theoretical construction to identify the assessment indicators of the school buildings from green architecture's perspective, in order to create suitable and general assessment tool for schools building in Mosul city which can help improving the performance of these schools, decreasing the effect on the health, sparing energy coasts, and other benefits in the stages of the project ( pre-construction, construction, post-construction ). The research supposes that the multi-dimensional designing strategy is an active tool used in establishing the tool classification of assessment. For reaching goals, the research adopts the theoretical method and questionnaire. Finally, the research provides an assessment tool for school building in Mosul from the green architecture's perspective (AGBS) Green Building Assessment Tool for school ) in conformity with the local context of the city for enabling the designer to follow it in order to achieve the investment within his school architectural products. Results indicate six categories for assessment tool. First Sustainable Sites category (SS) which have the greatest weight 25.7%, , then Indoor Environment Quality(IEQ) 24.35667%. then Materials & Resources (M&R), Energy & Atomosphere (A&E), Water Efficiency(WE),and Innovotion in design (ID), have 17.32% ، 10.5% ، 3.987181% , Respectively.


Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2489 ◽  
Author(s):  
Jitka Mohelníková ◽  
Miloslav Novotný ◽  
Pavla Mocová

Existing building stock represents potential for energy saving renovations. Energy savings and indoor climate comfort are key demands for sustainable building refurbishment. Especially in schools, indoor comfort is an extremely important issue. A case study of energy consumption in selected school buildings in temperate climatic conditions of Central Europe region was performed. The studied buildings are representatives of various school premises constructed throughout the last century. The evaluation was based on data analysis of energy audits. The goal was aimed at assessment of the school building envelopes and their influence on energy consumption. One of the studied schools was selected for detailed evaluation. The school classroom was monitored for indoor thermal and visual environments. The monitoring was performed to compare the current state and renovation scenarios. Results of the evaluation show that the school buildings are highly inefficient even if renovated. Indoor climate in classrooms is largely influenced by windows. Solar gains affect interior thermal stability and daylighting. Thermal insulation quality of building envelopes and efficient solar shading systems appear to be fundamental tasks of school renovation strategies.


2021 ◽  
Vol 312 ◽  
pp. 02013
Author(s):  
Giada Romano ◽  
Francesco Mancini

According to the European Renovation Wave, the European building stock is obsolete and changes very slowly: more than 220 million housing units and 85-95% of the existing buildings will still be in use in 2050 and are absolutely not energy efficient. To cut emissions by 55% by 2030, the EU should reduce greenhouse gas emissions from buildings by 60%, their final energy consumption by 14% and energy consumption for heating and cooling by 18%. It is therefore urgent for the EU to focus on making buildings more energy efficient, less carbon intensive throughout their life cycle and more sustainable. From this framework comes the need for an adaptation not only of residential buildings but also of hotel facilities, which, on a national scale, make up about 45% of the accommodation facilities. In particular, the offer of accommodation facilities must be constantly adequate and the structures must be upgraded so that they always remain usable and comply with current regulations from the accessibility, seismic-structural and energy point of view. In this research, four hotels located in the historic centre of Rome have been analysed as case studies. Starting from an analysis of the current state, a series of interventions on the building envelope and systems have been studied, evaluating energy savings and the reduction of polluting emissions. With regard to the systems, the total electrification of the heating and domestic hot water preparation systems has been hypothesised, with the introduction of storage systems, also in view of participation in Demand Response programs.


2017 ◽  
Vol 13 (1) ◽  
Author(s):  
Isaura Marques De Souza Uhmann ◽  
Sérgio Fernando Tavares

RESUMO: Em um contexto onde a arquitetura discute seu papel na busca por um mundo mais sustentável, destaca-se a presença destes aspectos no edifício escolar. No Brasil as condições de projeto e manutenção deste tipo de construção não são as mais adequadas. Dentre os problemas que mais afligem esta tipologia arquitetônica estão às más condições das coberturas, que além de prejudicar sua utilização pelos usuários comprometem a edificação, diminuindo sua vida útil. O objetivo dessa pesquisa é avaliar índices de Energia Embutida EE e emissão de CO2 entre o sistema de cobertura tradicional e o sistema de telhado verde extensivo proposto para substituição das coberturas originalmente implementadas nas escolas da rede pública do Paraná. A pesquisa tem natureza exploratória com aplicação em estudo de caso. Para estes estudos foi utilizada a formatação em planilhas, cuja estratégia é avaliar a substituição das coberturas convencionais por telhados verdes, atendendo orientações da legislação de licitações, administração pública e convênios com a participação de instituições estatais. Os dados de Energia Embutida EE e emissão de CO2 avaliados apontam para a viabilidade na implementação da readequação por telhados verdes extensivos. A principal contribuição deste trabalho é a implementação de uma técnica mais sustentável em edificações públicas escolares podendo inclusive apontar para novas posturas na concepção e execução de obras desta natureza ABSTRACT: In a context where the architecture discusses its role in the search for a more sustainable world, there is the presence of these aspects in the school building. In Brazil design conditions and maintenance of this type of construction are less suitable. Among the problems that afflict most school buildings are to poor coverage, which in addition to discomfort for users to undertake the life of the building. The objective of this research is to evaluate rates of EE embedded energy and CO2 emissions between traditional roofing system and extensive green roof system proposed to replace the covers originally implemented in Paraná public schools. The research is exploratory in nature with application case study. For these studies we used the formatting in spreadsheets, thus meeting guidelines bidding law, public administration and agreements with the participation of state institutions. The strategy is to evaluate through simulation tables, replacing the conventional covers for green roofs. Data assessed in these simulations indicate the feasibility for implementation by readjusting the extensive green roofs, thus using more sustainable technology. It is also observed the feasibility of a standard design change currently in effect.


Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2230 ◽  
Author(s):  
Jacopo Gaspari ◽  
Michaela De Giglio ◽  
Ernesto Antonini ◽  
Vincenzo Vodola

The paper reports a methodology developed to map energy consumption of the building stock at the urban scale on a GIS environment. Energy consumption has been investigated, focusing on the shift from the individual building scale to the district one with the purpose of identifying larger homogenous energy use areas for addressing policies and plans to improve the quality and the performance levels at the city scale. The urban planning zoning concept was extended to the energy issue to include the energy behavior of each zone that depends on the performance of its individual buildings. The methodology generates GIS maps providing a district scale visualization of energy consumption according to shared criteria. A case study in Bologna city (Italy) is provided. In the specific case, the last update of Emilia-Romagna regional urban planning regulation required a mapping action regarding energy efficiency of homogeneous urban portions defined by the General Urban Plan. The main achieved results are (a) a methodology to identify homogeneous areas for analyzing energy consumption; (b) an updated energy map of Bologna Municipality.


2015 ◽  
Vol 82 ◽  
pp. 512-518 ◽  
Author(s):  
Gianluca Rospi ◽  
Nicola Cardinale ◽  
Francesca Intini ◽  
Tiziana Cardinale

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