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1 – 2 of 2Fuad Baba, Jihad Awad, Yazan Elkahlout and Mohammed Sherzad
This paper aims to compare the impacts of adaptive daily and seasonal cooling setpoints on cooling energy consumption and overheating hours to determine which approach is more…
Abstract
Purpose
This paper aims to compare the impacts of adaptive daily and seasonal cooling setpoints on cooling energy consumption and overheating hours to determine which approach is more effective in a desert climate, develop a methodology that effectively integrates passive strategies with adaptive daily and seasonal cooling setpoint strategies and assess how future climate conditions will impact these strategies in the medium and long term.
Design/methodology/approach
(1) Integrate adaptive thermal comfort principles into mechanical cooling systems to find the optimized cooling setpoint. (2) Evaluating the optimized cooling setpoints using a mixed-mode operation: In this step, the natural ventilation is activated by opening 40% of the window area when the indoor temperature is higher than 23°C and the outdoor temperature. Both the adaptive seasonal and daily setpoint strategies are evaluated. (3) If overheating hours exceed acceptable limits gradually add mitigation measures (e.g. exterior shading, cool roofs and green roofs). (4) If necessary, further reduce the cooling setpoint until acceptable limits are met. (5) Generate extreme future climate scenarios and evaluate the optimized model. (6) Implement additional measures and setpoint adjustments to maintain acceptable overheating hours in future conditions.
Findings
Although the building complies with the Dubai Green Code and uses external shading, its cooling energy consumption was 92 kWh/m² in 2021 with a 24°C setpoint. Using the adaptive seasonal setpoint combined with a cool roof, night cooling and cross-ventilation reduces cooling energy consumption by 52, 48 and 35% in 2020, 2050 and 2090, respectively, with overheating hours not exceeding 40 h annually. Using an adaptive daily setpoint strategy with the same mitigation measures is similarly effective; it achieved a 57, 42 and 34% reduction in cooling energy consumption in 2020, 2050 and 2090, respectively, while eliminating overheating hours.
Originality/value
The originality and value of this study lie in optimizing cooling setpoints without the effect of overheating hours in desert climates. Using the adaptive seasonal setpoint combined with a cool roof, night cooling and cross-ventilation reduces cooling energy consumption by 52, 48 and 35% in 2020, 2050 and 2090, respectively, with overheating hours not exceeding 40 h annually. Using an adaptive daily setpoint strategy with the same mitigation measures is similarly effective; it achieved a 57, 42 and 34% reduction in cooling energy consumption in 2020, 2050 and 2090, respectively, while eliminating overheating hours.
Highlights
- (1)
A methodology is developed to find the optimal cooling setpoints
- (2)
Adaptive thermal comfort concept is extended for integration with a cooling system
- (3)
Validation simulation model is used using certain building information
- (4)
Climate change effect is studied using current and future warmer typical years
- (5)
Effective passive summer mitigation measures are studied
A methodology is developed to find the optimal cooling setpoints
Adaptive thermal comfort concept is extended for integration with a cooling system
Validation simulation model is used using certain building information
Climate change effect is studied using current and future warmer typical years
Effective passive summer mitigation measures are studied
Details
Keywords
Nur Rosdiatul Husna Ahmad-Fauzi and Norsafinas Md Saad
The growing demand for halal products has attracted small and large companies looking to secure their market share in the lucrative global halal market. However, it is difficult…
Abstract
Purpose
The growing demand for halal products has attracted small and large companies looking to secure their market share in the lucrative global halal market. However, it is difficult for resource-constrained firms, such as small and medium enterprises (SMEs), to compete internationally. Therefore, drawing from a resource-based view, this paper aims to examine how intangible resources affect the export performance of Malaysian SMEs exporting halal food and beverages (F&B) products.
Design/methodology/approach
This study used a purposive sampling technique, and respondents were reached out by mail. Out of 517 local SMEs exporting halal-certified F&Bs contacted, 193 firms responded, and only 188 responses were eligible to be used for data analysis. The partial least squares structural equation modelling technique was used to conduct the analysis. The data underwent measurement and structural model evaluation to confirm the hypotheses postulated.
Findings
Based on the data analysis conducted, it was discovered that intangible resources, namely, international orientation and marketing capability, significantly influence the export performance of Malaysian SMEs exporting halal F&B. However, the influence of cultural intelligence on export performance could not be demonstrated.
Originality/value
This paper fills the gap of the need for more attention to SMEs in developing countries, especially in the halal industry. This research paper also contributes to international business and halal studies by promoting an understanding of intangible resources as strategic resources for SMEs to create competitive advantages and elevate their export performance in the emerging global halal market.
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