Retrofitting of existing buildings to achieve better energy-efficiency in commercial building case study: Hospital in Egypt

Radwan, Ahmed F.; Hanafy, Ahmed A.; ElHelw, Mohamed; El-Sayed, Abd El-Hamid A.

doi:10.1016/j.aej.2016.08.005

Cited by 49 publications

(30 citation statements)

References 11 publications

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“…Papers [6][7][8][9][10][11][12] presented various controlled lighting systems to produce the required illuminance according to the human occupancy, reference to the place activity or by the vehicles traffic density in the street [10] and illumination sensors [11]. Paper [13] showed the reduction in electrical power consumption for the commercial buildings by some modifications of the installations and used materials. Paper [14] presented the design and implementation of a prototype scaled model, which can switch the power to street lamps between solar and grid supply with economic manner.…”

Section: Introductionmentioning

confidence: 99%

A New Trend for Indoor Lighting Design Based on A Hybrid Methodology

Selim

Elkholy

Bendary

2020

Journal of Daylighting

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Most power system planners are interested in the savings of electrical power consumption. Various references demonstrate that the highest consumed power is by the lighting systems standing around 19% of worldwide energy consumption. This article presents novel design methodology leading to maximizing revenue due to savings in electrical energy consumption through energy efficient installations. This hybrid methodology is built by combining benefits of the two traditional lighting design methods (lumen and specific connected load methods). This results in developing a new mathematical and applicable model with many advantages such as: high accuracy, fast calculations and most economical design. This proposed methodology is supported by MATLAB ® package to shorten the long time consumed by conventional procedures and simplify the complex manual calculations. The hybrid method verifies its effectiveness and efficiency for achieving the maximum savings in energies and costs through the detailed discussion of case studies. A comparison with traditional designs will be introduced to ensure the achieved savings in costs leading to high quality and efficiency of power systems. By practically applying this new hybrid technique particularly for the Egyptian residential and commercial sectors, the system is expected to achieve a huge savings in consumed lighting energies and costs, which can reach 4489.433415 million E£ "≈ 280.5895 million $ "USD"" each year. The presented case studies give accurate and promising results for the proposed methodology as a new trend in energy and money saving system, which is verified by implementing two case studies and comparing with results from DIALux program. The results of the proposed methodology are very effective compared with that of conventional methods for marked benchmarking features and validation. MATLAB ® simulation results of the proposed technique are implemented to verify its feasibility for any activity.

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Section: Introductionmentioning

confidence: 99%

A New Trend for Indoor Lighting Design Based on A Hybrid Methodology

Selim

Elkholy

Bendary

2020

Journal of Daylighting

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“…Michele Zinzi et al found that double glazing with a shading device in the gap improved the total energy performance by significantly reducing the cooling loads compared to the relative increase in the heating load [18]. It was found that reducing the window to wall ratio from 40% to 30% reduces energy consumption by 4.3% in residential buildings in Egypt [19]. A study conducted for various locations across Europe found that triple glazing had the best performance [20].…”

Section: Introductionmentioning

confidence: 99%

Improving the Energy Efficiency of the Residential Buildings in Jordan

Bataineh

Alrabee

2018

Buildings

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The purpose of this study is to investigate the impact of energy retrofit programs for the existing residential buildings under the typical Jordanian climate. The Jordanian climate has mild heating season and a hot (and usually dry) cooling season. Several building types located in Jordan were considered as case study. The household sector in Jordan accounts for almost 43% of the total electricity consumption. Three levels of energy retrofit programs have been proposed. The economic, environmental and social benefits of the programs have been analyzed. Parametric analyses have been performed to determine the impact of each energy efficiency measure on the energy performance of residential buildings. The payback period for each level have been determined for several regions located in Jordan. The results proved the feasibility of the program except for implementing the third level on a traditional house. The results show that implementing level 3 energy efficiency measures can save up to 43% of the annual electricity consumption, save up to 842 MW on peak demand energy, and 2190 kilo-ton/year reduction of CO 2 emission. That is equivalent to 3.37 TWH of electricity consumption compared to the base case. The total jobs created will be 80,769 job/year when performing the retrofit program.

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“…The code is very detailed and may need a simpler version to be easy to use. Energy consumption in Egyptian public buildings, including administrative, educational and health buildings is the second largest type after residential [18]. Air conditioning in residential buildings in Egypt consumes about 56% of total energy per annum, [19].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Green Roofs and Green Walls on Energy Consumption and Indoor Comfort in Arid Climates

et al. 2018

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Increased urbanization have many negative effects on human well-being, city infrastructure, electricity usage and the increase of indoor temperatures. A solution may be to retrofit existing buildings, with implementing a vegetated layer to roofs and walls, this may enhance building performance, reduce consumption and improve indoor comfort. Cities with tall buildings may be more adequate to implement a green-wall as it have more area to make impact. This paper examines the energy reduction advantages of adding greenery on buildings in the hot arid climate of Egypt by considering three typical types of residential buildings in the city of Cairo as a case study. Designbuilder software was selected to stimulate the buildings chosen in this research. The results shows that an extensive soil thickness of 15cm performs better in the arid climates. electricity consumption for the base case is 52 kWh/m2 annually when used a traditional external envelop and dropped to 43 kWh/m2 when a vegetated layer added to the whole building (roof & wall), annual electricity consumption reduced by 17% to 25% per annum when added a vegetated layer. In addition to enhancing the indoor thermal comfort by 3 PMV values and indoor air temperature by 5°C.

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Retrofitting of existing buildings to achieve better energy-efficiency in commercial building case study: Hospital in Egypt

Cited by 49 publications

References 11 publications

A New Trend for Indoor Lighting Design Based on A Hybrid Methodology

A New Trend for Indoor Lighting Design Based on A Hybrid Methodology

Improving the Energy Efficiency of the Residential Buildings in Jordan

Effectiveness of Green Roofs and Green Walls on Energy Consumption and Indoor Comfort in Arid Climates

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