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

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.

Decision-making method for evaluating solar desalination options: the case of Saudi Arabia

2019 ◽  
Vol 11 (3) ◽  
pp. 343-356
Author(s):  
Sa'd Shannak ◽  
Malak Alnory
Keyword(s):  
Saudi Arabia ◽  
Solar Energy ◽  
Water Desalination ◽  
Economies Of Scope ◽  
Base Case ◽  
Analysis Model ◽  
Content Type ◽  
Desalination Plants ◽  
The Impact ◽  
Solar Generation

Purpose Solar as an energy source has a massive potential to reduce dependence on fossil fuels in Gulf Countries (GC). One attractive application of solar energy is solar-powered desalination, which is a viable method to produce fresh water. The most significant factor determining the potential deployment of this application is economics. Design/methodology/approach In this study, the classical economic analysis model has been modified to assess the penetration of solar technology to power desalination plants at different periods during the project lifetime. Furthermore, the environmental and financial values were combined to assess the incentive of powering desalination plants with solar energy in Saudi Arabia. Three systems of solar technologies accompanied with water desalination based on technical applicability were modeled and economically analyzed to understand the impact of various design and operation parameters. Findings This study shows that PV-RO is currently more competitive at both market and administrated prices in Saudi Arabia, followed by the MED-CSP system and finally CSP-RO system. CSP-RO system starts to generate positive surplus after 11 years, while the base case shows no positive surplus at all during the entire lifetime. Moreover, the same trend continues to hold with MED-CSP and PV-RO systems. The MED-CSP generates positive surplus after six years and PV-RO after five years only. On average, it takes eight years for a project running based on solar (CAPEX and OPEX) and desalination OPEX to generate positive cash surplus. Originality/value This paper discusses the debate about incentives for renewable energy in GC and the impact of coupling water production and solar generation. Given that there is no analytical framework built earlier, this paper provides an alternative methodology for policy analysis to understand the role of economies of scope to incentivize solar generation. In other words, the authors are investigating options to reduce the total cost of solar production as a result of increasing the number of different goods produced.

Impact of roof shading on building energy performance in warm & humid climatic places of India

2020 ◽  
pp. 50-64
Author(s):  
Kuladeep Kumar Sadevi ◽  
Avlokita Agrawal
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
Energy Performance ◽  
General Assumption ◽  
Climatic Conditions ◽  
Building Envelope ◽  
Passive Cooling ◽  
Base Case ◽  
U Value ◽  
The Impact

With the rise in awareness of energy efficient buildings and adoption of mandatory energy conservation codes across the globe, significant change is being observed in the way the buildings are designed. With the launch of Energy Conservation Building Code (ECBC) in India, climate responsive designs and passive cooling techniques are being explored increasingly in building designs. Of all the building envelope components, roof surface has been identified as the most significant with respect to the heat gain due to the incident solar radiation on buildings, especially in tropical climatic conditions. Since ECBC specifies stringent U-Values for roof assembly, use of insulating materials is becoming popular. Along with insulation, the shading of the roof is also observed to be an important strategy for improving thermal performance of the building, especially in Warm and humid climatic conditions. This study intends to assess the impact of roof shading on building’s energy performance in comparison to that of exposed roof with insulation. A typical office building with specific geometry and schedules has been identified as base case model for this study. This building is simulated using energy modelling software ‘Design Builder’ with base case parameters as prescribed in ECBC. Further, the same building has been simulated parametrically adjusting the amount of roof insulation and roof shading simultaneously. The overall energy consumption and the envelope performance of the top floor are extracted for analysis. The results indicate that the roof shading is an effective passive cooling strategy for both naturally ventilated and air conditioned buildings in Warm and humid climates of India. It is also observed that a fully shaded roof outperforms the insulated roof as per ECBC prescription. Provision of shading over roof reduces the annual energy consumption of building in case of both insulated and uninsulated roofs. However, the impact is higher for uninsulated roofs (U-Value of 3.933 W/m2K), being 4.18% as compared to 0.59% for insulated roofs (U-Value of 0.33 W/m2K).While the general assumption is that roof insulation helps in reducing the energy consumption in tropical buildings, it is observed to be the other way when insulation is provided with roof shading. It is due to restricted heat loss during night.

The impact of board composition and ownership structure on dividend payout policy: evidence from Saudi Arabia

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Helmi A. Boshnak
Keyword(s):  
Saudi Arabia ◽  
Ownership Structure ◽  
Dividend Policy ◽  
Payout Policy ◽  
Board Composition ◽  
Dividend Payout ◽  
Content Type ◽  
Listed Firms ◽  
Propensity To Pay ◽  
The Impact

PurposeThis study examines the impact of board composition and ownership structure variables on dividend payout policy in Saudi Arabian firms. In particular, it aims to determine the effect of board size, independence and meeting frequency, in addition to chief executive officer (CEO) duality, and state, institutional, managerial, family, and foreign ownership on both the propensity to pay dividends and dividend per share for Saudi-listed firms over the period 2016–2019.Design/methodology/approachThe paper captures dividend policy with two measures, propensity to pay dividends and dividend per share, and employs a range of regression methods (logistic, probit, ordinary least squares (OLS) and random effects regressions) along with a two-stage least squares (2SLS) model for robustness to account for heteroscedasticity, serial correlation and endogeneity issues. The data set is a large panel of 280 Saudi-listed firms over the period 2016 to 2019.FindingsThe results underline the importance of board composition and the ownership structure in explaining variations in dividend policy across Saudi firms. More specifically, there is a positive relationship between the propensity to pay dividends and board-meeting frequency, institutional ownership, firm profitability and firm age, while the degree of board independence, firm size and leverage exhibit a negative relation. Further, dividend per share is positively related to board meeting frequency, institutional ownership, foreign ownership, firm profitability and age, while it is negatively related to CEO duality, managerial ownership, and firm leverage. There is no evidence that family ownership exerts an impact on dividend payout policy in Saudi firms. The findings of this study support agency, signalling, substitute and outcome theories of dividend policy.Research limitations/implicationsThis study offers an important insight into the board characteristic and ownership structure drivers of dividend policy in the context of an emerging market. Moreover, the study has important implications for firms, managers, investors, policymakers, and regulators in Saudi Arabia.Originality/valueThis paper contributes to the existing literature by providing evidence on four board and five ownership characteristic drivers of dividend policy in Saudi Arabia as an emerging stock market, thereby improving on less comprehensive previous studies. The study recommends that investors consider board composition and ownership structure characteristics of firms as key drivers of dividend policy when making stock investment decisions to inform them about the propensity of investee firms to pay dividends and maintain a given dividend policy.

scholarly journals Multi-Objective Techno-Economic Optimization of Design Parameters for Residential Buildings in Different Climate Zones

2021 ◽  
Vol 14 (1) ◽  
pp. 65
Author(s):  
Muhammad Usman ◽  
Georg Frey
Keyword(s):  
Thermal Load ◽  
Energy Demand ◽  
Residential Buildings ◽  
Optimal Solution ◽  
Building Envelope ◽  
Design Parameters ◽  
Base Case ◽  
Economic Optimization ◽  
Single Family ◽  
Climate Zones

The comprehensive approach for a building envelope design involves building performance simulations, which are time-consuming and require knowledge of complicated processes. In addition, climate variation makes the selection of these parameters more complex. The paper aims to establish guidelines for determining a single-family household’s unique optimal passive design in various climate zones worldwide. For this purpose, a bi-objective optimization is performed for twenty-four locations in twenty climates by coupling TRNSYS and a non-dominated sorting genetic algorithm (NSGA-III) using the Python program. The optimization process generates Pareto fronts of thermal load and investment cost to identify the optimum design options for the insulation level of the envelope, window aperture for passive cooling, window-to-wall ratio (WWR), shading fraction, radiation-based shading control, and building orientation. The goal is to find a feasible trade-off between thermal energy demand and the cost of thermal insulation. This is achieved using multi-criteria decision making (MCDM) through criteria importance using intercriteria correlation (CRITIC) and the technique for order preference by similarity to ideal solution (TOPSIS). The results demonstrate that an optimal envelope design remarkably improves the thermal load compared to the base case of previous envelope design practices. However, the weather conditions strongly influence the design parameters. The research findings set a benchmark for energy-efficient household envelopes in the investigated climates. The optimal solution sets also provide a criterion for selecting the ranges of envelope design parameters according to the space heating and cooling demands of the climate zone.

Are Islamic financial institutions more resilient against the COVID-19 pandemic in the GCC countries?

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Erhan Akkas ◽  
Hazem Al Samman
Keyword(s):  
Saudi Arabia ◽  
Phase Analysis ◽  
Financial Institutions ◽  
Random Effect Model ◽  
Second Phase ◽  
Content Type ◽  
Gcc Countries ◽  
Effect Model ◽  
Islamic Financial Institutions ◽  
The Impact

Purpose This paper aims to investigate and provide an objective appraisal of the impact of the COVID-19 outbreak on Islamic and conventional financial institutions and Islamic windows in the Gulf Cooperation Council (GCC) countries. Design/methodology/approach The panel data techniques are conducted country-wise in each financial institution type: random-effect model, fixed-effect model and Hausman test. Findings The results of the first phase analysis that extends from 1 January 2020 to 30 October 2020 show that Islamic financial institutions are less exposed to the repercussions of the COVID-19 outbreak than the conventional and Islamic window financial institutions in Bahrain, Oman, Qatar, Saudi Arabia and UAE. Moreover, the Islamic financial institutions in Saudi Arabia and Oman have not been affected by the COVID-19 outbreak. The second phase analysis for the COVID-19 outbreak that extends from 1 November 2020 to 17 March 2021 confirms the disappearance of the negative impact of COVID-19 on Islamic financial institutions in Bahrain and Oman. Practical implications The findings present that Islamic banks are not as resilient in the COVID-19 pandemic as in the 2008 financial crisis. It can be suggested that regulatory authorities, financial institutions and other key policymakers in the GCC countries should focus on implementing regulatory reforms related to human capital, innovative products, research and development to further develop individuals, societies and institutions within the framework of Islamic ontology to be more resilient in such crises. Originality/value This paper provides a different perspective from existing literature on the pandemics and financial institutions by comparing the stock prices in Islamic and conventional financial institutions and Islamic windows in GCC countries during the COVID-19 pandemic. Therefore, this paper should be considered as a contribution to filling a gap in the literature.

The impact of religiosity on luxury brand consumption: the case of Saudi consumers

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Tagreed Saleh Abalkhail
Keyword(s):  
Saudi Arabia ◽  
Design Methodology ◽  
Positive Relationship ◽  
Muslim Women ◽  
Capital City ◽  
Luxury Consumption ◽  
Content Type ◽  
Luxury Brand ◽  
Islamic Countries ◽  
The Impact

Purpose The purpose of this study was to examine the impact of religiosity on luxury brand consumption among Muslim women. Design/methodology/approach A total of 322 women were surveyed. Data was collected in the capital city of Saudi Arabia and assessed using SEM. Findings The findings revealed that religion impacts consumers’ attitudes towards luxury brand consumption. A positive relationship was found between attitude towards luxury and luxury consumption. Also, attitude towards luxury mediated the relation between religiosity and luxury consumption. Originality/value The study’s findings serve to remind the retailers in Islamic countries to keep in mind the importance of religion in consumers’ preferences and selections.

Why do consumers buy counterfeit luxury products? A tale of two major cities in two different countries

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Norizan M. Kassim ◽  
Mohamed Zain ◽  
Naima Bogari ◽  
Khurram Sharif
Keyword(s):  
Saudi Arabia ◽  
Social Status ◽  
Equation Modeling ◽  
Content Type ◽  
Status Consumption ◽  
Value Consciousness ◽  
Luxury Products ◽  
The Impact ◽  
The Relationship ◽  
Social Status Insecurity

PurposeThe purpose of this paper is to examine customer attitudes toward purchasing counterfeit luxury products (ATPCLP) in two cities in two different countries (Saudi Arabia and Malaysia) by testing the relationships between the various reasons for purchasing those products: social status insecurity, status consumption and value consciousness.Design/methodology/approachQuestionnaires were distributed conveniently to urban customers in Kuala Lumpur, Malaysia and Jeddah, Saudi Arabia. Altogether 658 useable questionnaires were collected and analyzed using descriptive statistics, general linear model of univariate analysis of variance and structural equation modeling.FindingsQuality, price, popularity and status signaling represent the main motivating factors for their brand choices of counterfeit luxury products among the two country groups of customers. As expected, customers' social status insecurity influences their ATPCLP, but not their status consumption. However, status consumption does positively moderates the relationship of their social status insecurity and their ATPCLP. Furthermore, customers' value consciousness influences their ATPCLP and moderates the relationship between status consumption and ATPCLP. The impact of status consumption on ATPCLP depends on the importance one places on the value of the products. However, the authors found no differences in social status insecurity, status consumption and value consciousness, on their ATPCLP among the customers. Some implications and limitations of the results are discussed.Research limitations/implicationsThe use of convenience sampling and mainly college students (in Saudi Arabia) as respondents represent the main limitations of this study.Practical implicationsThe practical implication of this study is to discourage the purchasing of counterfeit luxury products in their respective country Malaysian marketers need to stress that their genuine products are of top quality while Saudi marketers need to stress that their genuine products are of well-known brands that are sourced from well-known countries of origin. Besides, Malaysian marketers need to offer genuine products that are not overly priced or ones that indicate value-for-money while Saudi marketers need to convey the message that their genuine products could help enhance or uplift their customers' social status. In this study, the authors did not find any support for differences in ATPCLP between the two rather different Muslim-majority countries. This could be due to the fact that the majority of the respondents were females in their mid-20s and that both countries have a growing number of young customer base, which makes them particularly attractive target customers for branded/luxury products and, at the same time, easy preys to luxury products counterfeiters. This implies that there are still more opportunities for academics to study the topic or related topics in the future.Originality/valueAs far as the authors know, no one has undertaken a comparative study involving two very different Islamic majority countries (more conservative mono-cultural and mono-ethnicity Saudi Arabia versus less conservative multicultural and multi-ethnicity Malaysia) before.

Sustainability and cost assessment of coastal vacation homes for energy retrofits

2017 ◽  
Vol 7 (2) ◽  
pp. 185-198 ◽  
Author(s):  
Kamalesh Panthi ◽  
Kanchan Das ◽  
Tarek Abdel-Salam
Keyword(s):  
Energy Use ◽  
Energy Savings ◽  
Residential Buildings ◽  
Building Envelope ◽  
Energy Usage ◽  
Water Heater ◽  
Content Type ◽  
Modeling Software ◽  
Energy Use Intensity

Purpose Vacation rental homes, in general, have different energy usage characteristics than traditional residential homes mainly because of the occupancy pattern that changes on a weekly basis. These homes, predominantly larger in size, offer a greater scope for energy savings also because of the wasteful habits of their seasonal occupants. The purpose of this paper is to investigate the causes of energy inefficiencies prevalent in these homes so that appropriate retrofit choices can be offered to homeowners. Design/methodology/approach This research presents a case study of a vacation rental home whose energy consumption was investigated in depth and energy inefficiencies identified through modeling using energy modeling software, eQUEST. Simulations were performed to identify viable retrofit scenarios. Findings While improvement in the building envelope such as providing shades/overhangs on the windows, reducing infiltration and increasing insulation of the exterior wall did not show promising results for savings on energy cost, other improvements such as use of highly efficient lamps, tank-less water heater system and occupancy sensors showed viable investment options with shorter payback periods. It was also found that energy use intensity of sampled houses was about half of the average of US residential buildings, which could primarily be attributed to the seasonal nature of occupancy of these houses. Originality/value There is a dearth of literature pertaining to energy efficiency-related retrofits of coastal vacation homes. This research fills that gap to some extent by addressing this issue with an ultimate aim of assisting homeowners in retrofit decision-making.

OPEC quotas may have small impact

2016 ◽  
Keyword(s):  
Saudi Arabia ◽  
Oil Production ◽  
Change Strategy ◽  
Content Type ◽  
Small Impact ◽  
Future Action ◽  
The Us ◽  
Policy Direction ◽  
The Impact

Significance OPEC's decision to try to agree new quotas for its members, albeit with key exemptions, suggests a fragile consensus is growing around a change in policy direction towards cooperation. Impacts Perceptions will strengthen that Saudi Arabia is prepared to change strategy. A framework and platform for future action should allow OPEC to reassert its cartel position. Agreement on quotas is unlikely to reduce export volumes much, limiting the impact on prices. The prospect of a deal will see further additions to the US rig count, with implications for US oil production in 2017. If prices rise, encouraging more investment, and Libyan and Nigerian output recovers, OPEC output could rise even if quotas are imposed.

Raheel boosts Riyadh’s anti-terrorism alliance

2017 ◽  
Keyword(s):  
Saudi Arabia ◽  
Middle Eastern ◽  
Arms Sales ◽  
Content Type ◽  
Military Alliance ◽  
Political Relations ◽  
Military Campaign ◽  
The Impact ◽  
At Home

Subject The impact of Raheel Sharif taking over as the head of the Saudi-led counterterrorism alliance Significance Pakistan’s retired chief of army staff General Raheel Sharif was last month appointed commander of the Saudi Arabia-led Islamic Military Alliance to Fight Terrorism, which now has 41 members. The appointment boosts the image of the Islamic Alliance at a time of limited progress on Saudi-Pakistan political relations and little clarity on the goals and strategy of the Alliance itself. Impacts Saudi-Pakistan military-to-military ties will develop, partly due to their longstanding defence pact and arms sales. Islamabad will continue to improve ties with Iran, even if that means somewhat alienating Riyadh. Pakistan’s army will avoid any Middle Eastern military campaign that could worsen Shia-Sunni divisions at home.

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