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Abstract Developing countries face a crisis of deteriorating and unsafe human settlements conditions. Few studies examine the resources and energy required to provide everybody with decent housing. This study presents a generic methodology for the estimation of Life Cycle Energy (LCE) requirements to meet the housing gap and provide basic comfort to everybody in a developing country, based on standards of safety, durability and indoor temperature and humidity limits. The methodology includes the operationalization of this decent housing standard into materials and equipment; development of appropriate building archetypes; calculation of embodied and operating energy using a building simulation model; a parametric analysis to investigate the range of uncertainty in LCE and the attribution to different contextual conditions and energy savings measures. Results for the test case India showed that LCE of decent housing can significantly vary depending on climatic conditions, building typology, construction materials, technical equipment for space cooling-dehumidification and user behaviour. Embodied energy accounts for 27–53% of the LCE, depending on the building type and climate. LCE savings of up to 44% can be achieved with low embodied energy materials, building envelope insulation, ceiling fans and more efficient air-conditioning systems.

Abstract Adaptive comfort plays an important role in defining comfort standards when considering comfort in buildings in free-running mode, including adaptation to external temperatures, opening windows and changing clothing. In this regard, two international standards provide the fundamental basis to model the necessary equations: EN 16798 (formerly 15251) and ASHRAE 55–2017. This research intends on assessing the feasibility of applying these standards to the Chilean context, where a legal framework has begun to be implemented to regulate the occupant's comfort in social housing. Extensive monitoring of inhabitants in existing units under free-running mode has been undertaken in several social housing projects in the city of Concepcion (Chile) and the collected data has been contrasted against the international standards. Results show that users in these houses show more tolerance to cold temperatures, thus, despite being allocated below the standards' lower limits, they are considered to be in thermal comfort. As a result, the outcomes of this research can shed light on the feasibility of applying international standards to social housing and low-income families in Chile. The study presents a proposal for a novel adaptive comfort model for Chile. The new model proposes adapting the thermal comfort threshold's lower limit in order to develop a national standard that better reflects the inhabitants' needs and socio-economic culture. The study demonstrates how the proposed model best fits the thermal comfort conditions in social housing in Chile.

Abstract With growing health risks from rising temperatures in the Global South, the lack of essential indoor cooling is increasingly seen as a dimension of energy poverty and human well-being. Air conditioning (AC) is expected to increase significantly with rising incomes, but it is likely that many who need AC will not have it. We estimate the current location and extent of populations potentially exposed to heat stress in the Global South. We apply a variable degree days (VDD) method on a global grid to estimate the energy demand required to meet these cooling needs, accounting for spatially explicit climate, housing types, access to electricity and AC ownership. Our results show large gaps in access to essential space cooling, especially in India, South-East Asia and sub-Saharan Africa. Between 1.8 to 4.1 billion, depending on the required indoor temperatures and days of exposure, may need AC to avoid heat related stresses under current climate and socio-economic conditions. This number far exceeds the energy poverty gap indicated by the Sustainable Development Goal for electricity access (SDG7). Covering this cooling gap would entail a median energy demand growth of 14% of current global residential electricity consumption, primarily for AC. Solutions beyond improved AC efficiency, such as passive building and city design, innovative cooling technologies, and parsimonious use of AC will be needed to ensure essential cooling for all with minimized environmental damage. Meeting the essential cooling gap, as estimated by this study, can have important interactions with achieving several of the SDGs.

Abstract Cities in China have undergone considerable transformation in recent decades with unprecedented economic growth, rural to urban migration and a rapidly emerging middle class all contributing to increased energy consumption. In this context, we investigate the inability of urban households in the cold climate zone in northern China to access sufficient domestic energy services, and thus their vulnerability to energy poverty, focusing upon heating provision. Results of a questionnaire survey of households in the urban area of Beijing (n = 880) are analysed using Latent Class Analysis, a methodologically novel approach to developing a typology of energy poverty. The analysis highlights vulnerabilities that increase the likelihood of a household being unable to access adequate heating in the home in this context. Despite provision of state-subsidies for heating in cities in northern China, a mechanism that might be anticipated to buffer households from energy poverty, these do not shield from the cold those households that lack access to efficient and flexible networked infrastructures, or a high quality, built environment. Our findings represent the first detailed study of energy poverty in relation to heating in this geographical context and have significant implications for domestic policy-making concerned with energy poverty, residential energy efficiency and energy consumption.

Conceptually, many energy poverty studies to date have been narrowly focused on inadequate indoor heating, paying little attention to other domestic energy services. Yet there are indications that a growing number of households in Europe are struggling to achieve adequate levels of indoor cooling, with adverse consequences for their health, well-being and productivity. This situation is exacerbated by changing global weather patterns, with many countries facing increases in the frequency and intensity of extreme heatwaves. There is limited understanding of the ways in which households respond to extreme heat, and consequently how this might create greater demand for indoor space cooling and air conditioning, and the consequences for increased stress on power grids and conflicts with carbon reduction goals. Using custom-built survey data collected from 2,337 households in Gdańsk (Poland), Prague (Czech Republic), Budapest (Hungary) and Skopje (FYR Macedonia), along with in-depth qualitative fieldwork with 55 households in the same cities, this paper presents novel evidence on the issue of summertime energy poverty and space cooling difficulties. We identify the driving forces of household vulnerability to excessive indoor heat, in terms of risk of exposure, adaptive capacity, and sensitivity, and explore the implications for addressing energy poverty.

Abstract Like all industrialised countries, Belgium accepted to diminish its greenhouse gas emissions in the frame of the Kyoto agreement. On top of the list figures CO2. A major emission source for CO2 is burning fossil fuels. As the residential sector accounts for 28% of the country’s annual energy consumption and as this consumption mainly concerns fossil fuels, it has an equally important share in the CO2 release. Hence, at first sight, the best policy for a decrease is by improving the energy efficiency. The question to be solved, however, is which improvement could generate the reduction needed? This study discusses a methodology and comments simulations that help in answering that question. The results are not as simple as one should like. The housing stock in fact acts as a conservatory system. For the case being, the impact of energy efficient new construction on the CO2 release remains quite marginal if the period considered does not extend beyond a decade. The effect becomes significant only over a longer period, on condition that more stringent energy efficiency measures are combined with a shift from new construction to retrofit and reconstruction. Also a diminishing increase in the number of households may help in reducing energy consumption and CO2 release.