The Impact of Shading device on Energy Consumption in the Hot-Humid climate of Saudi Arabia

In general, a double-skin façade has been used to reduce energy consumption as well as to improve thermal performance in buildings as a buffer space between indoors and outdoors. The goal of this study is to undertake pre-normative research to provide information for developing a comprehensive double-skin façade system under the climatic condition in Saudi Arabia. To pursue this goal, the characteristics associated with the double-skin façade system are identified. In addition, the impact of various configurations on the thermal performance of the double-skin façades is evaluated under the weather situation in Saudi Arabia. Computational double-skin façade models are created by computational fluid dnamics simulation to assess the thermal performance of the various configurations such as cavity geometry and the use of a shading device. As a result, the variation of the opening size has a significant impact on the temperature in the cavity of the double-skin façade. For the air velocity in the cavity, the variation of the opening size and cavity depth is less sensitive. Moreover, the use of a shading device has an impact on the temperature drop in the cavity of the double-skin façade. Practical application: Generally, many studies have investigated the efficiency of double-skin façade applications due to its beneficial aspects. However, a few buildings have adopted double-skin façades to their envelopes. With a substantial growing demand for building industry in Saudi Arabia, double-skin façade applications to building design can be a solution for reducing building energy consumption. The present study investigates the thermal performance of double-skin façades under hot climates in Saudi Arabia and it can provide information for building stakeholders to develop proper double-skin façade systems

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Parametric study of the impact of building envelope systems on embodied and operational carbon of residential buildings

International Journal of Building Pathology and Adaptation ◽

10.1108/ijbpa-08-2020-0064 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Amneh Hamida ◽

Abdulsalam Alsudairi ◽

Khalid Alshaibani ◽

Othman Alshamrani

Keyword(s):

Saudi Arabia ◽

Residential Buildings ◽

Building Envelope ◽

Base Case ◽

Content Type ◽

Embodied Carbon ◽

Block Wall ◽

Shading Device ◽

The Impact ◽

Total Life

PurposeBuildings are responsible for the consumption of around 40% of energy in the world and account for one-third of greenhouses gas emissions. In Saudi Arabia, residential buildings consume half of total energy among other building sectors. This study aims to explore the impact of sixteen envelope variables on the operational and embodied carbon of a typical Saudi house with over 20 years of operation.Design/methodology/approachA simulation approach has been adopted to examine the effects of envelope variables including external wall type, roof type, glazing type, window to wall ratio (WWR) and shading device. To model the building and define the envelope materials and quantify the annual energy consumption, DesignBuilder software was used. Following modelling, operational carbon was calculated. A “cradle-to-gate” approach was adopted to assess embodied carbon during the production of materials for the envelope variables based on the Inventory of Carbon Energy database.FindingsThe results showed that operational carbon represented 90% of total life cycle carbon, whilst embodied carbon accounted for 10%. The sensitivity analysis revealed that 25% WWR contributes to a significant increase in operational carbon by 47.4%. Additionally, the efficient block wall with marble has a major embodiment of carbon greater than the base case by 10.7%.Research limitations/implicationsThis study is a contribution to the field of calculating the embodied and operational carbon emissions of a residential unit. Besides, it provides an examination of the impact of each envelope variable on both embodied and operational carbon. This study is limited by the impact of sixteen envelope variables on the embodied as well as operational carbon.Originality/valueThis study is the first attempt on investigating the effects of envelop variables on carbon footprint for residential buildings in Saudi Arabia.

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Strategies for Reducing Energy Consumption in a Student Cafeteria in a Hot-Humid Climate: A Case Study

Journal of Sustainable Development of Energy Water and Environment Systems ◽

10.13044/j.sdewes.2013.01.0002 ◽

2013 ◽

Vol 1 (1) ◽

pp. 14-26 ◽

Cited By ~ 3

Author(s):

Mohammed Alhaji Mohammed ◽

Ismail Mohammad Budaiwi

Keyword(s):

Energy Consumption ◽

Humid Climate ◽

Hot Humid Climate ◽

Reducing Energy

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Energy Conservation Potential of Economizer Controls Using Optimal Outdoor Air Fraction Based on Field Study

Energies ◽

10.3390/en13195038 ◽

2020 ◽

Vol 13 (19) ◽

pp. 5038

Author(s):

Goopyo Hong ◽

Chul Kim ◽

Jun Hong

Keyword(s):

Energy Consumption ◽

Energy Conservation ◽

Temperature Control ◽

Energy Savings ◽

Cooling System ◽

Energy Performance ◽

Outdoor Air ◽

Humid Climate ◽

Differential Enthalpy ◽

The Impact

In commercial buildings, HVAC systems are becoming a primary driver of energy consumption, which already account for 45% of the total building energy consumption. In the previous literature, researchers have studied several energy conservation measures to reduce HVAC system energy consumption. One of the effective ways is an economizer in air-handling units. Therefore, this study quantified the impact of the outdoor air fraction by economizer control type in cooling system loads based on actual air-handling unit operation data in a hospital. The optimal outdoor air fraction and energy performance for economizer control types were calculated and analyzed. The result showed that economizer controls using optimal outdoor air fraction were up to 45% more efficient in cooling loads than existing HVAC operations in the hospital. The energy savings potential was 6–14% of the differential dry-bulb temperature control, 17–27% of the differential enthalpy control, 8–17% of the differential dry-bulb temperature and high-limit differential enthalpy control, and 16–27% of the differential enthalpy and high-limit differential dry-bulb temperature control compared to the no economizer control. The result of this study will contribute to providing a better understanding of economizer controls in the hospital when the building operates in hot-humid climate regions.

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Assessment of Different Natural Ventilation Strategies for an Educational Building on the Warm-Humid Climate of Guayaquil, Ecuador

Volume 2: Photovoltaics; Renewable-Non-Renewable Hybrid Power System; Smart Grid, Micro-Grid Concepts; Energy Storage; Solar Chemistry; Solar Heating and Cooling; Sustainable Cities and Communities, Transportation; Symposium on Integrated/Sustainable Building Equipment and Systems; Thermofluid Analysis of Energy Systems Including Exergy and Thermoeconomics; Wind Energy Systems and Technologies ◽

10.1115/es2015-49701 ◽

2015 ◽

Author(s):

R. David Beltrán ◽

Juan Kastillo ◽

Isabel Miño-Rodríguez ◽

Carlos Naranjo-Mendoza ◽

Carlos Ávila

Keyword(s):

Energy Consumption ◽

Natural Ventilation ◽

Energy Savings ◽

Main Concern ◽

Humid Climate ◽

The Real ◽

Ventilation Strategies ◽

Definition Of ◽

The Impact ◽

Real State

Natural ventilation has been studied as an effective strategy in order to reduce energy consumption without compromising occupant’s hygrothermal comfort in warm-humid climates. However, the main concern about the current state of art in the use of Building Energy Simulation (BES) as an approach to natural ventilation is the definition of input data which usually do not represent the real state of the buildings in the studied region. Within this context, the main contribution of this research is to propose a methodology through which the real state of buildings can be evaluated. By this analysis, valid input parameters was found to exploit the capabilities of BES and CFD simulations to fulfill the main objective of this study, which is to assess the impact of natural ventilation strategies in the energy consumption of HVAC systems and occupants hygrothermal comfort. Four natural ventilation strategies were evaluated: single sided ventilation, cross ventilation, solar chimney and double façade. The results show that the exclusive use of natural ventilation is ineffective to ensure hygrothermal comfort in a building with high thermal loads in a warm-humid climate like Guayaquil. However, by using a hybrid system (natural ventilation/dehumidification and cooling) cooling energy consumption can be reduced in up to 10.6% without compromising occupant’s hygrothermal comfort. Due to the promising results regarding energy savings, further research will aim to evaluate the impact of other passive strategies in energy consumption.

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