5 results found.
European Journal of Sustainable Development Research, 2022, 6(3), em0189, https://doi.org/10.21601/ejosdr/12039
ABSTRACT: Building envelope such as external walls are still constructed from poor materials which results in higher heating and cooling loads thereby raising energy bills. Improving building energy efficiency with advanced technologies is being sought. In this context, a numerical study was conducted to solve the coupled heat transfers through a standard wall structure used in Libyan residential buildings. Different techniques were compared to reduce the thermal transmittance of the traditional wall structure for saving energy including the application of radiant shield, low-e coating, insulating filling and external insulation. The numerical results revealed that the thermal radiation inside the cavities of hollow block is important and accounts for 21% of total heat transfer, while conductive and convective heat transfer contributes by 65% and 14% from the total, respectively. The obtained thermal transmittance value of the common wall structure was considered as high as 2.33 W/m2·K due to lower resistance of wall elements. The adoption of 50 mm layer of expanded polystyrene insulation (EPS) to the exterior wall showed the best thermal performance with a reduction of thermal transmittance by 45%. On the other hand, filling the interior of cavities with EPS resulted in a 37% reduction of thermal transmittance compared to 20% of using 3 mm aluminum foil as a radiant barrier in the middle of the cavities. The last case was less effective with a reduction of almost 10% when a commercial coating of 0.4 surface emissivity was applied to the interior of cavities.
Assessment of New Sustainable Housing Project in Gdynia Using Justification Tools for Health-Promoting Urban Design and Architecture
European Journal of Sustainable Development Research, 2022, 6(1), em0179, https://doi.org/10.21601/ejosdr/11581
ABSTRACT: This paper presents the assessment of Gdynia-Zachód–a new sustainable housing project in Gdynia. This assessment uses a series of justification tools: the universal standard for health-promoting places and the universal standard for eco-neighborhood design. The first tool evaluates the therapeutic qualities of public open green space–public park and walkability of pathways leading to open green space. The second one assesses the basic sustainability standards and lifestyle quality. Gdynia-Zachód is a flagship urban development based on a new urbanism charter. The charette and workshops were organized to invite public participation in this project. The project is still under development, but it was assumed it is a good moment for the assessment to justify future design decisions. This study also demonstrated the practical usage of the universal standards as justification tools.
Valuation of Ecosystem Services and Environmental Damages: An Imperative Tool for Decision Making and Sustainability
European Journal of Sustainable Development Research, 2020, 4(4), em0133, https://doi.org/10.29333/ejosdr/8321
ABSTRACT: Economics being a major field in management has paved its way into environment to tackle the issues concerned with environmental/ecosystem services degradation and is acting as an aspect of human wellbeing and sustainability. Environmental degradation due to pollution is very well known and is measured thoroughly throughout the world. However, the end point impacts are seldom measured and not reported. There are very few responsible companies in the world who are aware about this fact and are reporting these externalities, or the third-party impacts, of their businesses. Various facets of ecosystem services on the other hand are known and have various measurement frameworks as well. The current paper discusses both the aspects i.e. ecosystem services and environmental externalities with respect to assessment techniques and highlights the way in which these fields have developed over the years along with their current methods and trends. The paper will help researchers and policy makers, working in this field, by making them aware about various means by which these estimations can be done so that the gap between environmental degradation and sustainability can be bridged.
European Journal of Sustainable Development Research, 2019, 3(2), em0078, https://doi.org/10.20897/ejosdr/3965
ABSTRACT: Energy crisis and environmental degradation is considered most talked of the topics of modern global development. Medical waste has dangerous impacts on the environment. Besides, load shedding has come to be a great problem in socioeconomic development of Bangladesh for the reason that of the serious electricity crisis. This study also focused on energy recovery potentiality from plastic content of medical waste (PCMW) by converting it into electric energy. This plastic waste integrates an enormous amount of energy and consequently, attention in new renewable sources of energy from these wastes has been augmented, at the present time. Bangladesh as well as Jessore city faces an excessive environmental problem because of improper management of medical waste. This study demonstrated that the medical waste generation rate in Jessore city was found to be approximately 3 ton/day which is about 6.89% of total waste generation in this city throughout the study period. Besides, electric power generation projections from the PCMW were estimated at 74448 kWh per year respectively. This study suggested that appropriate PCMW management policy as well as awareness increasing regarding the management of PCMW is requirement for the development of existing status of living condition.
European Journal of Sustainable Development Research, 2018, 2(4), 42, https://doi.org/10.20897/ejosdr/3910
ABSTRACT: Buildings are responsible for significant natural resource consumption, waste generation, and environmental pollution. Building impacts are generally assessed through life cycle analysis (LCA). This study integrates LCA with the Ecological Footprint indicator for the assessment of a building's impact on the planet. In order to determine ecological impact of a building, a methodology has been established for estimation of Life Cycle Ecological Footprint (LCEFtotal) of the building, as well as to assess its impact due to resource consumption (energy, water, building materials, manpower etc.) and waste assimilation over the lifecycle. For an academic building located in India taken as a case study, the LCEFtotal is found to be 4397.03 gha and the LCEFtotal per unit floor area is 0.60 gha/m2. The average annual Ecological Footprint (EFavg) of the academic building is 73.28 gha/yr that is approximately 20 times more than the actual physical land of the campus. The average annual Ecological Footprint per student (EFavg/student) of the academic building is 0.045 gha/yr/student. If annual grid electricity consumption of the building is replaced by the grid-connected rooftop photovoltaic (GRSPV) system in the ratios of 100%, 75%, 50% and 25%, it can reduce up to 61%, 54%, 31%, and 15% of the total LCEFtotal of the academic building, respectively.