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1 – 10 of over 4000
Article
Publication date: 26 September 2019

Khadidja El-Bahdja Djebbar, Souria Salem and Abderrahmane Mokhtari

The purpose of this paper is to analyze energy performance of the multi-storey buildings built in the city of Tlemcen between 1872 and 2016.

Abstract

Purpose

The purpose of this paper is to analyze energy performance of the multi-storey buildings built in the city of Tlemcen between 1872 and 2016.

Design/methodology/approach

A diagnosis based on a bottom-up methodology, using statistical techniques and engineering, has been developed and applied. To do this, demand condition analysis was conducted using a data collection survey on a sample of 100 case studies. Physical characteristics of the buildings have been determined through the archetype by period. This serves to define the strengths and weaknesses of buildings as energy consumers.

Findings

The obtained results showed that dwellings built between 1872 and 1920 offer better energy performance with a consumption index close to 130kWh/m2/year and this compared to the five periods considered. For dwellings built between 1974 and 1989, energy consumption is higher with an index approaching 300kWh/m2/year, thus qualifying the buildings of this period as energy intensive.

Originality/value

A database is established to collect physical information on the existing housing stock and thus allow their classification vis-à-vis of the energy label. This study is part of a research project aimed at evaluating and determining optimal measures for energy rehabilitation of multi-family buildings in Tlemcen. Thermal rehabilitation solutions are proposed using thermal simulations, in the following studies, to improve thermal performance of existing buildings. This study constitutes the first step of a roadmap applicable to other cities constituting climatic zones in Algeria. This helps to enrich the Algerian thermal regulation in thermal rehabilitation of existing residential buildings and conception of new ones, in urban areas with a similar climate.

Details

International Journal of Building Pathology and Adaptation, vol. 38 no. 1
Type: Research Article
ISSN: 2398-4708

Keywords

Article
Publication date: 14 November 2008

George K. Stylios

Examines the fourteenth published year of the ITCRR. Runs the whole gamut of textile innovation, research and testing, some of which investigates hitherto untouched aspects…

1268

Abstract

Examines the fourteenth published year of the ITCRR. Runs the whole gamut of textile innovation, research and testing, some of which investigates hitherto untouched aspects. Subjects discussed include cotton fabric processing, asbestos substitutes, textile adjuncts to cardiovascular surgery, wet textile processes, hand evaluation, nanotechnology, thermoplastic composites, robotic ironing, protective clothing (agricultural and industrial), ecological aspects of fibre properties – to name but a few! There would appear to be no limit to the future potential for textile applications.

Details

International Journal of Clothing Science and Technology, vol. 20 no. 6
Type: Research Article
ISSN: 0955-6222

Keywords

Article
Publication date: 13 November 2009

George K. Stylios

Examines the fifthteenth published year of the ITCRR. Runs the whole gamut of textile innovation, research and testing, some of which investigates hitherto untouched aspects…

1149

Abstract

Examines the fifthteenth published year of the ITCRR. Runs the whole gamut of textile innovation, research and testing, some of which investigates hitherto untouched aspects. Subjects discussed include cotton fabric processing, asbestos substitutes, textile adjuncts to cardiovascular surgery, wet textile processes, hand evaluation, nanotechnology, thermoplastic composites, robotic ironing, protective clothing (agricultural and industrial), ecological aspects of fibre properties – to name but a few! There would appear to be no limit to the future potential for textile applications.

Details

International Journal of Clothing Science and Technology, vol. 21 no. 6
Type: Research Article
ISSN: 0955-6222

Keywords

Article
Publication date: 14 September 2015

John Joachim Gelegenis, Douglas Harris, Danae Diakoulaki, Helen Lampropoulou and George Giannakidis

The purpose of this paper is to investigate the reduction in efficiency of central heating systems of multi-family buildings when independent heating capability is offered to each…

Abstract

Purpose

The purpose of this paper is to investigate the reduction in efficiency of central heating systems of multi-family buildings when independent heating capability is offered to each apartment, to access the impact of the applied heating cost allocation (HCA) on this deterioration and suggest highly cost-effective ways (operation, control strategy, alternative HCA) of overcoming them at minimum cost.

Design/methodology/approach

The paper reveals the problem of reduced efficiency in centrally heated multi-family dwellings through two case studies in real buildings, where data-loggers were installed and performance curve analysis was performed, in combination with detailed simulation.

Findings

The paper finds that the enforcement of a suitable HCA regulation is a prerequisite to achieving energy savings in centrally heated multi-family dwellings. In addition the effects of dissimilarly heated apartments on the total energy demand and the significance of indirect heating and how these should be charged, are assessed. It is found that convenient operation of the central heating system may lead to high energy cost savings and higher efficiency at no cost.

Research limitations/implications

HCA adopted more than three decades ago should be revised according to the present situation, namely, increasing fuel costs, existence of many low income families, energy poverty, availability of alternative (or supplementary) heating devices and better building envelopes.

Practical implications

Occupants of multi-family dwellings should be appropriately educated and agree on rational use of the common heating system of the building.

Originality/value

The paper identifies weak points of valid HCA regulation, reveals inefficiencies in centrally heated multi-family dwellings and measures the actual effectiveness of remedying measures. Detailed simulation contributes to the scientific documentation of the findings.

Details

Management of Environmental Quality: An International Journal, vol. 26 no. 6
Type: Research Article
ISSN: 1477-7835

Keywords

Article
Publication date: 1 April 1998

Andrew Maxwell

Mechatronics, the art of combining robotics, computer control, and electronics, was the topic at the recent annual M2VIP conference (mechatronics and machine vision in practice…

1060

Abstract

Mechatronics, the art of combining robotics, computer control, and electronics, was the topic at the recent annual M2VIP conference (mechatronics and machine vision in practice) held at the University of Southern Queensland, Toowoomba, Australia, 23‐25 September. This was the fourth conference in the series which originated in Toowoomba in 1994, followed by Hong Kong in 1995 and Portugal in 1996. Papers from all around the globe were presented showing varied aspects of research ranging from mechatronic education, sensor design, mobile legged robots, self learning systems, robots in manufacturing, through to novel applications of mechatronics in sport. Some of the more memorable articles for the author are highlighted including mechatronic education, sport mechatronic systems, almost‐human walking robots, and autonomous underwater surveillance submarines.

Details

Industrial Robot: An International Journal, vol. 25 no. 2
Type: Research Article
ISSN: 0143-991X

Keywords

Article
Publication date: 27 September 2013

Alan Abela, Mike Hoxley, Paddy McGrath and Steve Goodhew

The Energy Performance of Buildings Directive (EPBD) 2002/91/EC introduced various obligatory requirements intended to achieve the reduction of use of energy resources in…

Abstract

Purpose

The Energy Performance of Buildings Directive (EPBD) 2002/91/EC introduced various obligatory requirements intended to achieve the reduction of use of energy resources in buildings. This directive had to be transposed into national legislation by the EU member states. Concurrently the European Committee for Standardisation developed a number of technical standards to assist member states to define the methodology for the calculation of the energy performance of buildings. The purpose of this paper is to present a comparative review of the relationship between the European directive and the standards, and the different country legislation and methodologies that have been implemented in Malta, Italy, Spain and Cyprus.

Design/methodology/approach

The analysis is based on a review of national legislation in the four states. Reference is also made to publications by the Concerted Action for the EPBD and to related publications by the national bodies responsible for the implementation of the EPBD. These include the Ministry for Economic Development in Italy, the Ministry of Commerce, Industry and Tourism in Cyprus, the Ministry for Resources and Rural Affairs in Malta, and the Ministries of Industry Tourism and Commerce and of Housing in Spain.

Findings

This paper analyses and compares the implementation of the directive using the above‐mentioned sources. In so doing, it focuses on general principles rather than on the specific technical requirements for the calculation method in the various states. The paper then considers the implementation of these general principles within each state before finally drawing conclusions about whether legislation relating to the original Directive 2002/91/EC is meeting its objectives and the implications relating to the requirements of the recast Directive 2010/31/EC.

Research limitations/implications

The introduction of the directive in the states considered has taken place slowly and gradually over the last three to four years. There are few publications relating to the actual implementation of the directive, and this limits the possibility of comparison of sources.

Originality/value

The relationship between the EPBD and the milder climate experienced in the Mediterranean is considered to be of great importance, particularly since world temperatures are slowly rising. However, it is acknowledged that insufficient research has been carried out on the energy performance of buildings in this region. This paper investigates the existing legal structures that have been put into place to implement the EPBD and the effectiveness of this implementation to date.

Details

International Journal of Law in the Built Environment, vol. 5 no. 3
Type: Research Article
ISSN: 1756-1450

Keywords

Article
Publication date: 8 June 2020

Wei Zhang, Shang Hao, Dandan Zhao, Guiqin Bai, Xin Zuo and Jiming Yao

This study aims to evaluate the thermal performance of phase change materials (PCMs) microcapsules (MCs) attached using SiO2 microspheres and investigate the thermal regulation

Abstract

Purpose

This study aims to evaluate the thermal performance of phase change materials (PCMs) microcapsules (MCs) attached using SiO2 microspheres and investigate the thermal regulation effect on the coated denim fabric.

Design/methodology/approach

The PCM microcapsule was prepared by in situ polymerization using a mixture of solid paraffin and butyl stearate as core material (CM) and methyl methacrylate as a monomer. The SiO2 microparticles were attached to the outer layer of the membrane to enhance the thermal performance of MCs. The morphology, chemical structure, latent heat storage and thermal resistance of MCs were characterized. PCM MCs were coated on the denim fabric and thermo-gravimetric analysis was conducted; thermal insulation and thermal infrared imaging performance of the coated fabrics were also investigated.

Findings

The diameters of SiO2 particles and PCMs MCs were 300-500 nm and 1 μm, respectively. SiO2 was wrapped on single-wall PCMs MCs with the mass ratio of 1:5. With the addition of SiO2, the phase transition temperature range of MCs increased from 34°C to 39°C, and the endothermic and exothermic latent heat decreased by 5.35 J/g and 10.07 J/g, respectively. The degradation rate of MCs was significantly slowed down at high temperature. The denim fabric coated with MCs revealed thermal regulation property. After absorbing heat, the MCs slowed down the rate of heat loss and extended the heat release time.

Research limitations/implications

The phase transition temperature of the composite CM was wide, and the latent heat storage was reduced. The addition of SiO2 particles can significantly slow down the rate of heat loss, but it further reduces the latent heat storage performance.

Practical implications

The method developed provided a simple and practical solution to improve the thermal regulation performance of fabrics.

Originality/value

The method of adjusting the phase transition temperature range of the composite CM is novel and many applications could be found in preparation of PCMs and thermal management.

Details

Pigment & Resin Technology, vol. 49 no. 6
Type: Research Article
ISSN: 0369-9420

Keywords

Article
Publication date: 24 August 2012

Richard Griffiths and Steve Goodhew

Dwellings constructed before 1920 often had solid brick walls with poor thermal performance. Today there is a drive to reduce both energy demand and carbon dioxide production. The…

1266

Abstract

Purpose

Dwellings constructed before 1920 often had solid brick walls with poor thermal performance. Today there is a drive to reduce both energy demand and carbon dioxide production. The purpose of this paper is to demonstrate that mixtures of chopped hemp straw with lime based binders added to the external surface of brick walls can substantially reduce the air to air thermal transmittance, or U‐value W/m2 K, and that these mixtures provide a sustainable remedial treatment for solid brick walls. The aim is to achieve wall U‐values as good as, or better than, the current UK Building Regulations design value of 0.30 W/m2 K.

Design/methodology/approach

Several Microsoft Excel spread sheets have been constructed to determine the steady state and transient thermal properties of various brick walls. These spread sheets are validated by comparing their output with the published thermal data to be found in the CIBSE Design Guide. The sustainable aspects of a number of different externally hemp‐lime insulated Victorian brick walls are described and discussed.

Findings

The U‐values and the transient thermal properties of solid brick walls with thickness 110 mm, 220 mm and 340 mm are presented. The transient properties include the admittance, decrement factor and lag time. These walls are then considered with various added external layers of hemp‐lime ranging in thickness from 50 mm to 300 mm. Some solid brick walls have an added air cavity, created with studding and plywood sheathing, before the layer of hemp‐lime. Walls with external tile hanging for sites with high exposure to driving rain are also discussed.

Originality/value

The paper demonstrates the advantages of the energy saving and carbon dioxide sequestration achieved by adding 200 mm of a hemp‐lime binder insulation to the exterior of Victorian brick walls of terraced dwellings.

Details

Structural Survey, vol. 30 no. 4
Type: Research Article
ISSN: 0263-080X

Keywords

Article
Publication date: 5 May 2023

Hikmat Ali, Amal Abed and Alaa Rababah

As numerous research studies have investigated the effect of the built environment on human contentment, building regulations have advanced as a direct impact on indoor…

Abstract

Purpose

As numerous research studies have investigated the effect of the built environment on human contentment, building regulations have advanced as a direct impact on indoor environmental quality (IEQ) to include thermal, lighting, air quality and acoustics systems. Yet, while IEQ and residents' satisfaction have been discussed thoroughly in previous research, only a few studies have researched the role of building regulations as motivating factors in the housing context, specifically in Jordan.

Design/methodology/approach

A mixed-method approach was adopted to address this issue involving genotype analysis for building morphology and simulation using Design Builder software. This helped to understand the impact of building regulations variables, including building setback, the height of an adjacent building, orientation and building geometry. Meanwhile, an online survey was conducted to include 410 residents spread out in various building categories (A, B, C and D).

Findings

The results of this study revealed that building regulation of setbacks, the height of adjacent buildings and orientation are significant parameters that directly affect IEQ and residents' satisfaction. In addition, based on this study, the matter was clear that the highest total satisfaction resulted based on the highest comfort level in terms of temperature and daylight obtained due to larger setback and lower building height. Yet, this finding undermined smart growth principles due to the limited scope of building regulation that focused only on spatial and physical dimensions, so improving to include environmental aspects such as passive design strategies that appreciate natural ventilation and lighting is necessary, which positively impact IEQ.

Originality/value

The concept of IEQ and residents' satisfaction have been discussed thoroughly, but only a few studies have researched the role of building regulations as motivating factors in the housing context specifically in Jordan.

Details

Archnet-IJAR: International Journal of Architectural Research, vol. 18 no. 1
Type: Research Article
ISSN: 2631-6862

Keywords

Article
Publication date: 4 January 2021

Wei Zhang, Enzheng Xing, Shang Hao, Yonghe Xiao, Ruonan Li, Jiming Yao and Yonggui Li

This study aims to manufacture cotton fabric with thermal regulation performance by using the composite phase change material (CPCM) prepared by coating paraffin doped with…

Abstract

Purpose

This study aims to manufacture cotton fabric with thermal regulation performance by using the composite phase change material (CPCM) prepared by coating paraffin doped with expanded graphite (EG), and the thermal effect of the fabric material was evaluated and characterized.

Design/methodology/approach

EG/paraffin CPCM with shape stability and enhanced thermal conductivity were prepared by the impregnation method and then finished on the surface of cotton fabric with coating technology. The microstructure, crystal structure, chemical composition, latent heat property and thermal conductivity were analyzed by scanning electron microscope, x-ray diffraction, Fourier transform infrared spectroscopy, differential scanning calorimeter and thermal constant analyzer. The photo-thermal effect of the coated fabric was studied by a thermal infrared imager.

Findings

CPCM prepared with a mass ratio of EG to paraffin of 1:8 showed excellent shape stability and low paraffin leakage rate. The latent heat of the CPCM was 51.6201 J/g and the thermal conductivity coefficient was increased by 11.4 times compared with the mixed paraffin. After the CPCM was coated on the surface of the cotton fabric, the light-to-heat conversion rate of the C-EG/PA3 sample was improved by 86.32% compared with the original fabric. In addition, the coated fabric showed excellent thermal stability and heat storage performance in the thermal cycling test.

Research limitations/implications

EG can improve the shape stability and thermal conductivity of paraffin but will reduce the latent heat energy.

Practical implications

The method developed provided a simple and practical solution to improving the thermal regulation performance of fabrics.

Originality/value

Combining paraffin wax with fabrics in a composite way is innovative and has certain applicability in improving the thermal properties of fabrics.

Details

Pigment & Resin Technology, vol. 50 no. 4
Type: Research Article
ISSN: 0369-9420

Keywords

1 – 10 of over 4000