KHALED ELDEEB

@iau.edu.sa

Associate Professor at the Department of Self-Development - Deanship of Preparatory Year and Supporting Studies.
IMAM ABDULRAHMAN BIN FAISAL UNIVERSITY

KHALED ELDEEB


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https://researchid.co/khaledeldeeb

RESEARCH, TEACHING, or OTHER INTERESTS

Architecture
9

Scopus Publications

Scopus Publications

  • Energy performance assessment of venetian blinds in south-oriented residential spaces in hot arid desert climates
    Khaled El-Deeb
    Construction Innovation, 2024
    Purpose Window shading has always been an effective technique to control the access of solar radiation; however, inappropriate selection of the shading technique, location and optical properties may lead to an increase in energy consumed for cooling and artificial lighting. Venetian blinds (VBs) are a type of adjustable shading devices that can be installed to the interior, exterior or in between glass panes of a window and that can be easily implemented in both new and existing buildings. This study aims to investigate the impact of three VB parameters: slat angle, reflectivity and location on the overall energy consumption of a residential space with a south-facing facade under the hot arid desert climate of Saudi Arabia’s capital, Riyadh. For the purpose of globalizing the findings, the same investigations were applied for two other cities of similar climates: Cairo, Egypt, and Arizona, the USA. Design/methodology/approach A test room was modelled for energy simulation, with a 20% window-to-wall ratio. A VB was assigned with alternatives of being located to the indoor, outdoor or in between double glass panes. High, medium and low reflectivity values were applied at each location at slat angle alternatives of 15°, 30°, 45°, 60°, 75° and 90°. Findings Results showed VB performance across slat angles, where up to 20.1% energy savings were achieved by mid-pane high reflectivity VBs in Riyadh, while the value exceeded 30% in case of being externally located. A similar performance pattern occurred in the other two cities of hot arid desert climates: Cairo and Arizona. Research limitations/implications The study is limited to VBs at a fixed position, with no upward movement for partial or full openness conditions. The effect of blind control and operation on performance, such as the amount and duration of openness/closure of the blind and changes in slat angle across time, in addition to VB automation, shall be investigated in a future study. Practical implications The better understanding of VB energy performance achieved would enhance a more rational selection of VBs, which would benefit the construction industry as it would assist designers, real estate developer companies, as well as end-users in the decision-making process and help to realize energy-efficient solutions in residential buildings. VB production entities would also benefit by manufacturing and promoting for energy-efficient products. Originality/value In this study, a matrix of combinations of three VB parameters was developed, and the effect of these combinations on the overall energy consumption of both artificial lighting and heating, ventilation and air conditioning (HVAC) systems was evaluated and compared to identify the combinations of higher efficiency. The literature showed that these three parameters were hardly investigated in a combined form and hardly assessed by considering the overall energy consumed by both artificial lighting and HVAC.
  • Energy Performance Assessment of Vertical and Horizontal Venetian Blinds in East and West-Oriented Residential Spaces in Cairo
    Khaled El-Deeb
    Advances in Science Technology and Innovation, 2022
  • Implementing sustainability in retrofitting heritage buildings. Case study: Villa antoniadis, alexandria, egypt
    Ahmed Khalil, Naglaa Hammouda, Khaled El-Deeb
    Heritage, 2018
    Sustainable design is believed to stand on the opposite side of heritage conservation. This view is supported by the fact that sustainable design requires invasive measures to implement new technologies and treatments that challenge the principle of minimum intervention in heritage conservation. Another point of view sees heritage conservation as an already act of sustainable development that protects and preserves social and cultural resources such as heritage buildings and their intangible values. On the other hand, research and practice have proven that heritage buildings can be the subjects of sustainable design projects that achieve outstanding measures of sustainability and energy efficiency while not compromising the authenticity of the heritage value of the building. This sustainable conservation reaches its peak in adaptive-reuse projects of heritage buildings as reusing the building guarantees its ongoing maintenance and promotes its social, cultural and economic values to society, while giving it the ability to withstand modern users’ comfort and energy efficiency standards. This research presents a case study of the adaptive-reuse project of Villa Antoniadis in Alexandria; a heritage building built in the mid-nineteenth century and in the process of a major adaptive-reuse project. The history and significance of the building will be studied as well as the conservation values of the current project, then some proposals for interventions that could achieve more energy efficiency for the project while conserving the building are discussed. The research included a simulation of the building, using building energy modelling software for the current adaptive-reuse project as a base case, and the hypothetical application of different proposed sustainable interventions such as thermal insulation, double glazing, shading, lighting control, natural ventilation, and photovoltaic energy generation, where the energy savings potentials for each proposed intervention were studied. The simulation proved a possible reduction of 36.5% in the cooling, heating and lighting energy consumption as well as generated 74.7% of the energy required for cooling, heating and lighting from renewable energy sources.
  • Impact of shading windows on the significance of thermal insulation
    Proceedings of 33rd PLEA International Conference Design to Thrive PLEA 2017, 2017
  • Raising energy-efficiency of a heritage building - A modelled case study: The commercial chamber in Alexandria, Egypt
    Proceedings of 33rd PLEA International Conference Design to Thrive PLEA 2017, 2017
  • Effect of courtyard height and proportions on energy performance of multi-storey air-conditioned desert buildings
    30th International PLEA Conference Sustainable Habitat for Developing Societies Choosing the Way Forward Proceedings, 2014
  • Effect of building form and urban pattern : On energy consumption of residential buildings in different desert climates
    Proceedings 28th International PLEA Conference on Sustainable Architecture Urban Design Opportunities Limits and Needs Towards an Environmentally Responsible Architecture PLEA 2012, 2012
  • Effectiveness of external wall shading in reducing the energy consumption of desert buildings
    Ahmad Sherif, Khaled El-Deeb, Abbas. El Zafarany, Mohamed Aly
    Icsdc 2011 Integrating Sustainability Practices in the Construction Industry Proceedings of the International Conference on Sustainable Design and Construction 2011, 2012
    Shading has been always recommended as a way for solar control and reduction of heat gain in buildings. It blocks direct solar radiation of the hot desert environments, where cooling loads are significant. A number of publications addressed the effect of shading wall openings, such as windows, on energy consumption. However, a limited number of publications addressed the effectiveness of the shading of the solid parts of walls under extreme desert conditions. This paper investigates the energy saving potential of the shading of external solid walls of buildings. Simulations were conducted using the EnergyPlus Software. Annual energy consumption was calculated for two types of wall configurations and different wall shading alternatives. Values were derived for different cities having different climatic conditions. Conclusions were drawn on the best utilization of external wall shading methods.
  • Improving buildings' energy performance by defining optimum shape geometry of sun-breakers window shading
    Abbas el Zafarany, Ahmed Sherif, Khaled El-Deeb, Mohamed Aly
    Icsdc 2011 Integrating Sustainability Practices in the Construction Industry Proceedings of the International Conference on Sustainable Design and Construction 2011, 2012
    Sun-breakers are commonly used as external shading devices in buildings. They are composed of protruding surfaces around window edges to block solar rays from entering into the spaces to reduce energy cooling loads Good design of sun-breakers blocks solar rays during hot summer months to reduce cooling load, while passes them during cold winter season to decrease heating load. However, this design method may be over-simplified for global use. There are many locations where winter solar access generates cooling loads. Also, months that are similar in solar path location -e.g. August and April- cannot be similarly treated, as their climatic thermal conditions are different. Current design methods may use geometrical analytic Approaches to design sun Breakers, others are based on energy saving, usually are search methods. This paper reports on a research that aims at enhancing current methods for defining the optimum shape geometry of sun breakers. By providing energy based cut-off date that can be used with geometrical methods for design of shading devices for each geographical location. Cut-off date is defined according to optimum annual energy performance, including heating and cooling, and lighting loads. The energy performance of a typical building space was modeled using Energy Plus software. Sun breaker edge profiles were defined to fit around this window by geometric modeling of the solar rays for monthly time periods. Annual energy performance of series of edge shapes was simulated. The optimum edge profiles and cut off months and hours were defined for different locations. Results demonstrate that the cut-off date depends on both Latitude and climatic Conditions, using the method can lead to the design of sun breakers with significant energy savings.