• General Article

    Achieving urban sustainability for hilly urban areas by addressing degrading visual place quality aspects: A case of dharamshala region, himachal pradesh
    Bharmoria Rahul and Sharma Vandna
    Rapid growth of infrastructure facilities has seen the growth of small and big cities at a very fast pace, neglecting the growth … + READ MORE
    Rapid growth of infrastructure facilities has seen the growth of small and big cities at a very fast pace, neglecting the growth potential of the respective areas. This has affected areas that should be preserved and not disturbed for any development work. These areas are oddly growing, which is not good, especially given the case of hills, where ecological aspects are of prime importance. Such development also degrades the visual quality aspects of hill towns, which define the urban-scape and overall image of a region. In the hilly region of Dharamshala, located in the north-western Himalayas, India; the structuring and designing of urban spaces has become a difficult task for city planning. Present research work is aimed at identification and analysis of degraded visual place quality aspects of the hilly town of Dharamsala for the purpose of suggesting appropriate remedial measures for improving the visual aesthetics of the area to enhance tourist potential and quality of life for residents alike. For this purpose, questionnaire-based surveys and visual place quality measurements were taken and then analysed for problems and problematic areas by the Analytic Hierarchy Process technique. The study included examination of different physical and non-physical parameters of specific areas in Dharamshala town like ISBT, Kotwali Bazar, Chilgari, Depot Bazar, and Sheela Chowk/Dari by making an analytic hierarchy process comparison decision matrix for criteria and using a consistency index involving priority ranking. Results revealed appropriate solutions like address of street square, street sidewalk and street width in addition to amendments in existing acts and byelaws pertaining to planning and development, etc. These solutions, if adopted, would be helpful for upgrading overall aspects related to the degradation of the visual place quality of Dharamshala town. These results can be advantageously applied to other similar hilly regions. - COLLAPSE
    30 September 2022
  • General Article

    A study on the characteristics of urban idle spaces in declined area for urban regeneration in the dongincheon station area
    Geonwoo Yeon and Insu Na
    The purpose of this study is to analyze the distribution status and causes of urban idle spaces. Urban idle spaces and urban … + READ MORE
    The purpose of this study is to analyze the distribution status and causes of urban idle spaces. Urban idle spaces and urban characteristics were analyzed as research sites focusing on Dongincheon Station in Incheon, which was designated as an urban regeneration district. Unused or potential urban spaces were divided into unused spaces, low-use spaces, and neglected spaces, and in detail, parking lots, prefabricated buildings, wedding shops, rooftops, abandoned buildings, vacant lots, and old buildings were identified. There were a total of 16 Urban idle spaces at the site. Different physical, economic, and institutional characteristics contribute to forming a difference in the form of urban idle spaces. This study is meaningful in classifying the factors that occur in urban idle spaces and deriving their characteristics. Future studies require the analysis of urban space characteristics of declining urban idle spaces, the preparation of urban regeneration plans, recognition, and behavioral identification. - COLLAPSE
    30 September 2022
  • General Article

    Building performance assessment of a retrofitted case study in Florence. Lessons learned from current practices
    Alessandra Donato, Rosa Romano and Paola Gallo
    Most residential buildings are not energy efficient and are still generally powered by fossil fuels. Concerning their renovations, the European Community introduced … + READ MORE
    Most residential buildings are not energy efficient and are still generally powered by fossil fuels. Concerning their renovations, the European Community introduced new minimum energy performance standards stimulating energy renovation of existing building stock and providing financial support for the necessary upfront investment. In this framework, the efforts to advance NZEBs in Italy, like in the other EU countries, focus on the existing buildings' deep renovation according to national energy labeling and the European Long-Term Strategy to 2050. For this purpose, it is therefore essential to support the design phase with energy simulations and tools to analyze the results achieved before and after the renovation. Thus, this paper focuses on analyzing a deep renovation of a terraced house in Florence, finalized to improve structural and energy performances through the building envelope and HVAC refurbishment. Furthermore, dynamic simulation tools have been used to perform a model-based analysis of the building performances to assess the effectiveness of retrofit measures, before and after building renovation. Two different thermal models have been compared in terms of energy demand for heating and cooling and thermal comfort parameters (PMV and PPD). Moreover, there is an improvement in thermal comfort throughout the year. Finally, a post-occupancy monitoring campaign on thermal comfort and Indoor Air Quality (IAQ) has been carried out to investigate comfort perceived by users in the winter season. - COLLAPSE
    30 September 2022
  • General Article

    Impact of window area and energy sources on the optimum insulation thickness and CO2 emission rate in residential buildings
    Adel Mohamed Benaissa Tidadini, Lotfi Derradji, Essaid Djakab and Mohamed Amara
    This work aims to optimize thermal insulation thickness of external walls considering the impact of energy sources and window size, in order … + READ MORE
    This work aims to optimize thermal insulation thickness of external walls considering the impact of energy sources and window size, in order to reduce the energy consumption and CO2 emissions of residential buildings. Window size is considered as a new variable in the life cycle cost analysis model to evaluate its impact on the optimum insulation thickness. The window size is expressed as a percentage and varies from 0% to 50% of the total wall area. Heating and cooling loads through the external wall are calculated using the degree-day method for seven cities in Algeria. The results of the optimization show that the thickness of the insulation vary between 4.2 cm and 12.6 cm for the coldest region, and between 6.4 cm and 11.9 cm for the warmest region, according to the type of fuel and the size of the window. The improved economic model allow an easy and fast application of the optimization procedure of the insulation layer as a function of the window size. In addition to the economic benefit of the insulation, the carbon dioxide released in the atmosphere can be reduced up to 87.53% with the appropriate heating and cooling system. - COLLAPSE
    30 September 2022
  • General Article

    Developing and optimizing of shading devices to improve daylight performance of glass and transparent domes
    Amin alah Ahadi
    Domes have a long architectural history. The structural efficiency, aesthetic and symbolic aspects, acoustical performance and the applications of domes in climatic … + READ MORE
    Domes have a long architectural history. The structural efficiency, aesthetic and symbolic aspects, acoustical performance and the applications of domes in climatic design have caused that the construction of the domes be continuous in the modern world. The lighting of large spaces under the domes has been a challenge for architects from the past to the present. Today, many of the modern domes have been made by glass and transparent materials and one of the important performances of these modern domes is daylighting. In this regard glare and overheating due to direct sun radiation exposure in connected spaces to glass domes are important problems which have received less attention. The optimizing of daylight performance of glass transparent domes by appropriate shading devices is the main goal of this research. In this regard, a multi-storey light shelf has been selected as shading device for the intended glass dome of this current study and its characteristics has been optimized by several modeling and simulations using Daysim software. Also, the optimal shape of dome and estimating the daylighting efficiency of the proposed dome and its optimized light shelf have been investigated. The selection of optimal models in this study was based on the appropriate annual UDI and its distribution in horizontal and vertical sections of models. The results of this study shows while the diameter of the dome is ‘d’, the best length of light shelf is “d/20” and the optimal distance between light shelves is “d/20”, the best horizontal position of light shelf is the half of the light shelf inside the glass dome and half outside and the optimal slope of light shelfs is -10 degrees. Also, the simulation results show that with the same light shelf characteristics and dome span length, increasing dome height increases the annual UDI value with the value of correlation coefficient of 0.4531 in vertical and 0.8369 in horizontal section of model. The daylighting efficiency of the proposed dome and its optimized light shelf has been estimated up to the height of ‘2.05d’ under the dome considering the penetration amount of appropriate daylight. - COLLAPSE
    30 September 2022
  • General Article

    A methodological approach for sustainable conservation and protection of historical timber bridges by encouraging their recognition as a world heritage site
    Pasquale Cucco
    Timber bridges represented important works for every civilization in all historical periods, from prehistory to the early Middle Ages, from classical Rome … + READ MORE
    Timber bridges represented important works for every civilization in all historical periods, from prehistory to the early Middle Ages, from classical Rome to the European Enlightenment, passing through China, Japan, and Southeast Asia. These artifacts played an important role in the history of human development; the architectural complexities and structural typologies are numerous and often diversified by geographical area and historical period, beyond the classic picturesque evocations. Many of them could rightfully become part of the World Heritage List, due to their exceptional character and uniqueness in terms of design, materials, workmanship or setting, as well as by virtue of the intangible values they still possess. However, these works, apart from those already universally recognized and protected, are underestimated, forgotten, or not protected and preserved in the best way. The paper, after an overview of the main historical testimonies of timber bridges, provides methodological and operational indications for studying and cataloguing these artifacts, by considering any architectural, urban and vulnerability aspects, to create a rich database and propose to activate shared protection to the national and international authorities. - COLLAPSE
    30 September 2022
  • General Article

    Sustainable cities through the right selection of vegetation types for green roofs
    Roohollah Taherkhani, Saaed Shaahnazari, Najme Hashempour and Faezeh Taherkhani
    The increasing desire for urban development has led to numerous environmental problems. Environmentally friendly design of building components is one of the … + READ MORE
    The increasing desire for urban development has led to numerous environmental problems. Environmentally friendly design of building components is one of the most appropriate solutions for sustainable urban development. Roofs make up a significant portion of the total area of ​​urban areas. Although green roofs are increasingly being implemented worldwide, there is still a lack of knowledge about choosing the best vegetation for a particular climate that can lead to optimal green roof performance. This study aims to develop a model of selecting the most suitable green roof vegetation under the cold semi-arid climatic conditions of Qazvin city in Iran. In this study, vegetation selection and climatic criteria were identified separately and were approved, weighted and prioritized based on experts' opinions using Likert and AHP questionnaires. Then the data were analyzed using SPSS statistical software. Findings show that among the vegetation selection criteria, economic, energy and environmental criteria, and among climatic ones, the normalization of sundials and temperature regime, are more important, respectively. Finally, the appropriate vegetation was selected for the desired climate. - COLLAPSE
    30 September 2022
  • General Article

    Numerical study of building elements to reduce summer cooling energy in the climate change in Seoul, Korea
    Choulwoong Kwon
    Climate change has been accelerated, which influences building energy consumption; in particular cooling energy in summer in Seoul, Korea. The prolonged hot … + READ MORE
    Climate change has been accelerated, which influences building energy consumption; in particular cooling energy in summer in Seoul, Korea. The prolonged hot season with urban heat island makes occupants run air conditioning over the season which could cause a shortage of National grid power. Existing and new buildings need to cope with climate change. This paper addresses verifying energy performance with different window ratios and canopies which are common elements in a building. Dynamic simulation tool, Designbuilder v7, with Energyplus engine is used to show the performance of between building elements. Canopy shows more adaptation with better energy reduction in the climate change in the 60% and 90% window-to-wall ratio (WWR). - COLLAPSE
    30 September 2022
Journal Informaiton International Journal of Sustainable Building Technology and Urban Development International Journal of Sustainable Building Technology and Urban Development
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