The interior temperature of a house in the south could rise 3.5 degrees due to climate change
The interior temperature of a house in the south could rise 3.5 degrees due to climate change
The interior temperature of a house in the south could rise 3.5 degrees due to climate change
Climate change is a problem of overheating inside buildings, especially in warmer regions such as southern Spain. Researchers from the University of Seville have carried out a study that estimates that the interior temperatures of a house, without air conditioning, in summer could increase about 3.5 ºC compared to today, with maximum daytime values of 37.5 ºC and 31 ºC of minimum value in night period, "that are far from the comfort conditions", according to experts.
The work, published in the Sustainability magazine, highlights that this increase in temperature will not only mean an increase in energy consumption associated with the greater use of refrigeration systems, but will also affect comfort and health conditions, and will increase of the risk of energy poverty that will affect the socially and economically most disadvantaged population group.
The Intergovernmental Panel on Climate Change (IPCC) has produced a series of reports that include different future scenarios, conditioned to social and economic variables, which entail different predictions of the evolution of greenhouse gas emissions and forecasting. of the weather. The use of climate projections helps to identify the impact of climate change on the energy performance of the residential park and allows us to recognize vulnerability for future climate scenarios.
In southern Spain, in the 2050 climate scenario, the increase in outdoor temperatures is expected to be about 1.5 ºC in winter and 6 ºC in summer, along with an increase in the number and duration of heat waves. Faced with this prediction, the researchers point out that by 2050, the current homes will not be able to provide an adequate response to this new climatic scenario.
The interior temperatures of a house, without air conditioning, in summer could increase about 3.5 ºC compared to the current ones, with maximum daytime values of 37.5 ºC and 31 ºC of minimum value in the night period. (Photo: US)
"The solutions used in the enclosures of homes, both in new construction and especially in those that are being rehabilitated, should be considered in this future climate scenario, and not focused on mere regulatory compliance. Otherwise, within a decade or two, we will begin to rehabilitate today's homes. The current techniques for increasing the thickness of thermal insulation will not be effective, we are even proving that they can become counterproductive by preventing the dissipation of heat at times when the outside temperature drops, "says co-author Rafael Carlos Suárez.
Regarding the utility of the energy certificate recently implemented in Spain, the experts clarify that it provides information on the energy performance of a home, but that this information is insufficient, since it does not contemplate comfort conditions in buildings. "It is necessary, therefore, a greater awareness on the part of the population of the current environmental problems. Future generations will have environmental conditions that depend on us. "
The increase in temperatures could limit the thermoregulatory capacity of the most vulnerable population groups, such as the elderly or those with diseases, causing dehydration, heat stroke, heat syncope, arrhythmias and the aggravation of previous diseases such as asthma. ..., causing an increase in morbidity and mortality.
To respond to these problems, architects recommend that passive techniques are used such as the protection of solar radiation, through solutions of facade and roof ventilated with materials with the highest possible solar reflection, and the use of solar protection systems in holes . These measures should be combined with adequate night ventilation in summer.
Although the study focuses on the southern part of Spain, these preventive measures can be extrapolated to other climatic zones, "it is enough to reconsider the climatic projection of said climatic zone and to check the effect of overheating and to evaluate the strategies of passive solutions", adds Suarez
Since 2013, thanks to the so-called Project Cell, the research group Architecture, Heritage and Sustainability: Acoustics, Lighting, Optics and Energy has some test cells in the International Center of the University of Seville. This research infrastructure aims to provide a global response to the energy and environmental problems of the extensive and dilapidated social housing stock existing in the Andalusian territory and located in areas with a Mediterranean climate. In the Celda project, the Public Works Agency and the Ministry of Development and Housing of the Junta de Andalucía participated.
"Our goal is to offer optimized façade solutions that reduce energy poverty and offer response measures to adapt the residential park to climate change, mitigating its effects on the population. Especially, we propose to use double skin facades in social housing to protect citizens with fewer resources, "the study authors emphasize. (Source: Source: UCC + i US)
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