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Energy Analysis and Improvement Proposal of a House in Requena (Spain) Using Simulation Software
Abstract
The enhancement of the energy efficiency in buildings implies the use of the energetic qualification to
make the users aware of the importance not only of the use of efficient equipments, but also of the efficient buildings. The Spanish regulation (Real Decreto 235/2013) supersedes the exigencies of the European Union
for existing buildings.
In this paper, a house in Requena (Valencia, Spain) of 1951 is analyzed from the energetic point of view. It
is a common type of building in regions of interior, adjacent with Aragon and Castilla, in which with the
intention of taking advantage of the natural light the higher plant is where the living takes place, being there
distinguished the stays of the domestic life, and in the ground floor is devoted to spaces of storage. A modest
house, constructed a few years after the end of the Carlists wars in Spain (1833‐1876), period in which,
known the support of the neighbors to Isabel II, the municipality suffered an epoch of decadence.
For the energetic study the software DesignBuilder has been used, for the analysis of energetically
efficient and sustainable buildings, which uses Energyplus, an engine of calculation worldwide recognized.
With this software an energetic dynamic simulation of the current condition of the housing has been
performed. After analyzing these results, the software Autodesk's Ecotect Analysis has been used, being an
interactive program of energetic simulation that works also with EnergyPlus, which has allowed us to use
initial data without dispersion in both programs.
A simulation of the building has been performed with Ecotect, realizing studies of wind roses of the zone
for the natural ventilation, solar incident radiation of the façades and shades of the building. The
psychometric curves have been analyzed, studying the improvements that the software proposes by using
them. Departing from the results of this analysis, diverse passive strategies to improve the energy efficiency
of the building are proposed.
To finish, DesignBuilder has been used again, to introduce the proposed improvements to do a new
simulation. The results obtained and compared to evaluate the success of the intervention are the loads of
the system in energetic demands of heating and the internal gains.
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Brandengen Primary School in Norway has historical valuable buildings from 1914, designed by the famous Norwegian architect Arnstein Arneberg. The owner, Drammen Municipality, emphasizes renovation in accordance with the conservation authorities’ request for restoring the façades to be as close as possible to the original historic look. To achieve future high performance building levels when renovating the school, i.e. low energy consumption and good indoor climate conditions, the main measures taken are additional insulation of attic and basement, new windows, and replacement of the oil burner with a geothermal heat pump. The target figure for energy reduction is set to 67%.
Architectural integration of plants in historic buildings has always been a much debated topic. Nowadays it is enriched with an ethical connotation linked to sustainability/environmental responsibility (reduction of energy consumption, using renewable energy sources, reduction of CO2 emission, etc.). This paper deals with the theme of integration of solar technologies in buildings and focuses on difficult and problematic relationship between the physical conformation of the plant and the cultural values of the building itself (especially on the cultural value of the image of built heritage). It wants to highlight how the satisfaction of requirements linked to the protection of these buildings, cultural resources of every city and nation, could constitute as an promoter of technological innovation. After making an investigation on major existing products on the solar technology, through a case study of residential historical building, we present the preservation criteria and guidelines that laying down principles for the validation of each existing technology on the market.
In the assessment of the indoor microclimate of heritage buildings, the general goal is to evaluate and improve users’ comfort. In our opinion the comfort of users should not come first; the approach should be: “Heritage First”, with priority given to the creation of the best microclimate conditions for the preservation of buildings, artefacts, etc. The case study described in this paper concerns an authentic exemplar: the Malatestiana Library in Cesena, Italy, listed in the UNESCO Memory of the World Programme. The indoor microclimatic conditions are exemplary because, since the year of its construction in 1454, its function as a library has remained unchanged: conserving the original book rests, same manuscripts and – most extraordinarily – the same indoor microclimatic conditions. The building does not have HVAC, never. Our hypothesis is that the lack of HVAC has allowed a perfect conservation of the book rests and of the manuscripts. In this paper we describe the results of the monitoring campaign; of how our research led to the discovery that microclimatic parameters change over a long period, as a result of simply opening windows to change the air, involving water vapour and CO2 variation within the air volume of Library.
This paper presents a qualitative and quantitative approach to natural lighting design for historical buildings, in this particular case study used as a public library. The interior design proposed for the old library of Palagio di Parte Guelfa in Florence, was based on solar radiation control and advanced daylight system application (two light shelves, a sky light and two light pipes) without modifying the architecture and structure of the building. The main objectives of the project were to increase lighting energy savings due to less artificial lighting system utilization, the corresponding daylight illuminance levels at long indoor distances from the windows, and to improve the uniformity of luminance distribution and illuminance gradient across the work-plane and at different inside levels and a comfortable lighting environment under variable sun and sky conditions throughout the year. A method was also proposed for evaluating daylight distribution in rooms of ancient buildings with small transparent surfaces and high thermal inertia, using solar shadings and light redirecting devices. It enabled a simplified hourly evaluation of the daylight utilization with reasonable accuracy and calculation speed and, because it was coupled to a simplified thermal model, evaluation of the impact of daylight utilization on hourly temperatures, heating and cooling demand.
- Directiva
Directiva 2010/31/EU del Parlamento Europeo y del Consejo, 19 de mayo de 2010, relativa a la
eficiencia energética de los edificios, Official Journal of the European Union L153 (2010)13-35.
Experimental comparison between 3 different traditional wall constructions and dynamic simulations to identify optimal thermal insulation strategies, Energy and buildings
- F Stazi
- A Vegliò
- C Di Perna
- P Munfò
F. Stazi, A. Vegliò, C. Di Perna, P. Munfò., (2013), Experimental comparison between 3 different
traditional wall constructions and dynamic simulations to identify optimal thermal insulation strategies,
Energy and buildings, Vol.60, 429-441.