http://apc.aast.edu/ojs/index.php/RESD

Renewable Energy and Sustainable Development Journal, 9 Abou Qear, Abu Qir Al Gharbeyah, Alexandria Governorate, Montaza 2 (2025)

11/11/2025

Renewable Energy and Sustainable Development
Vol 11, No 1 (2025)
https://apc.aast.edu/.../index.../RESD/issue/view/84/showToc

Adaptive bayesian sparse polynomial chaos expansion for voltage balance of an isolated microgrid at peak load PDF
Sunil Kumar, Rashmi Agarwal, Harivardhagini Subhadra
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1281

Abstract

Microgrids (MGs) are essential for ensuring a reliable and efficient power supply, particularly in isolated or islanded regions. One of the significant challenges faced is maintaining voltage balance during peak load periods, which is complicated by uncertainties in renewable energy availability, demand response, and system constraints. This paper introduces an Adaptive Bayesian Sparse Polynomial Chaos Expansion (BSPCE) framework designed to tackle these challenges effectively. Unlike traditional BSPCE methods that utilize fixed sampling strategies, our adaptive approach dynamically modifies sampling locations in response to approximation errors or model sensitivities. This allows for a more efficient allocation of computational resources, enhancing approximation accuracy in areas of high uncertainty. The framework systematically quantifies uncertainties related to maximum loadability and operational constraints, while also accounting for the impacts of battery energy storage systems, electric vehicles, and demand response mechanisms. By applying this methodology to the IEEE-15 bus system, we provide a comprehensive assessment of voltage balance in isolated microgrids during peak load conditions. The proposed method is capable of dealing with a big number of inputs that are correlated and follow unrelated distributions. The simulation modeling is performed on the MATLAB platform. The numerical results from the IEEE 15 test feeders confirm that the approach is accurate and efficient at the same time.

23/10/2025

Renewable Energy and Sustainable Development
Vol 11, No 1 (2025)
https://apc.aast.edu/.../index.../RESD/issue/view/84/showToc

Intelligent hybrid method to predict generated power of solar PV system
Prashant Singh, Navneet Kumar Singh, Asheesh Kumar Singh
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1264

Abstract

This paper presents a brand-new hybrid solar photovoltaic (PV) power forecasting model called empirical mode decomposition (EMD)-particle swarm optimisation (PSO)-adaptive neuro-fuzzy inference system (ANFIS). The model offers a solution to the challenge of accurately predicting generated solar PV power while considering the dynamic nature of environmental variables and solar radiation variability. As a solution, hybrid EMD-based PSO-ANFIS model is presented in this paper. Three different membership functions are compared to select the best input membership function, i.e., Gaussian. The input solar PV power data are broken down into intrinsic mode functions (IMFs) using EMD technique is fed into the PSO-ANFIS, along with important meteorological variables. The swarm optimisation is used to optimise the parameters of the ANFIS for enhanced accuracy. Utilizing empirical mode reconstruction of the ANFIS output, the predicted power of the solar PV system is computed. The suggested hybrid model's performance is evaluated and compared to alternative forecasting methods. It is discovered that the suggested model produces more accurate forecasts in terms of MAE, RMSE, and MSE. Additionally, the proposed model demonstrates robustness across various weather conditions, highlighting its applicability and effectiveness. Overall, this paper aims to explain the benefits of using a hybrid model instead of a standalone one, thereby enhancing the reliability and efficiency of solar PV power forecasting systems.

14/10/2025

Renewable Energy and Sustainable Development
Vol 11, No 1 (2025)
https://apc.aast.edu/.../index.../RESD/issue/view/84/showToc

Experimental investigation on linear fresnel reflector prototype for solar heat production
Omar Achahour, Badreddine El Ghazzani, Rachid Safoui, Aicha Eddemani, Mohamed Abbassi, Abdeslam Elfanaoui, Ahmed Ihlal
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1277

Abstract

This paper deals with the conception, design, and construction of a prototype of a Linear Fresnel Reflector (LFR) coupled with a Multi-Effect Distillation system intended to sea-water desalination. Our system consists of 11 flat glass mirrors with a total reflecting surface of 1.5 m2, and a tubular receiver-absorber located inside an evacuated glass tube equipped with a secondary reflector. To deal with the discontinuity in heat production, a thermal storage system was built using locally abundant materials such as a bed-rock. An experimental study of the thermal and optical performances of the system has been assessed to quantify the overall efficiency of our prototype. The salient features of our study include a stagnation temperature as high as 263 °C, the overall heat transfer coefficient reached 22.91 W/m²K, and the estimated collector’s efficiency at an operating temperature of 125°C was 56%. TRNSYS simulation of an LFR system similar to the proposed prototype was conducted. It shows that the system's thermal output is highly influenced by both tank size and flow rate.

08/10/2025

Renewable Energy and Sustainable Development
Vol 11, No 1 (2025)
https://apc.aast.edu/.../index.../RESD/issue/view/84/showToc

Experimental study of a flat plate air solar collector fitted with mini concentrators
Zakaria Sari Hassoun, Mohammed Benramdane, Hiba Imane Berrezoug, Khaled Aliane
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1236

Abstract

The present work presents an experimental study on the evolution of the temperatures of the various components making up a flat solar collector intended to produce hot air. To do this, it was deemed necessary to design and manufacture a new type of flat plate air solar collector equipped with cylindrical mini-concentrators with reflective mirrors (CMCRM). The temperatures were measured using type K thermocouples placed on the glazing, absorber, and in the air space between the absorber and glazing. The temperatures of ambient air and at the outlet of the solar collector were also measured. Several series of measurements were recorded during the day of April 13, 2023. Starting from an ambient air temperature of around 27 °C (inlet air temperature), it was found that the temperatures at the absorber and at the output of the solar collector could reach 139 °C and 129 °C, respectively, which represents an improvement of 30% compared to a conventional air solar collector. These results are considered as very encouraging.

29/09/2025

Renewable Energy and Sustainable Development
Vol 11, No 1 (2025)
https://apc.aast.edu/.../index.../RESD/issue/view/84/showToc

Tracing live projects in architectural education: a systematic review of experiential learning practices
Mohammed Fawzi Ragheb, Rowaida Rashed, Ayat Ismail, Mohamed Abdelkarim Salheen
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1293

Abstract

This paper discusses the growing role of live projects as experiential learning practices in architectural education. It aims to explore how live projects are conceptualized, implemented, and integrated into design curricula across diverse contexts. Employing the PRISMA 2020 framework, the study systematically reviews literature from major academic databases. Three key findings emerge: live projects enhance student learning by linking theory with practice, promote social engagement through community collaboration, and support interdisciplinary, context-responsive education. Limitations include a lack of longitudinal impact studies and inconsistencies in terminology and assessment. Drawing from the discussion and conclusion, the paper contributes a synthesized understanding of live project pedagogy, identifies operational and pedagogical challenges, and highlights their potential to reshape architectural education. It also calls for more rigorous research, sustainable institutional support, and broader adoption of live projects as a transformative model that aligns academic learning with professional and societal responsibilities

09/09/2025

Renewable Energy and Sustainable Development
Vol 11, No 1 (2025)
https://apc.aast.edu/.../index.../RESD/issue/view/84/showToc

Modeling and optimization of a solar adsorption cooling system under weather conditions in Algeria
Mohammed Benramdane, Adenane Ghrici, Zakaria Sari Hassoun, Mohammed El Amine Chikh
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1224

Abstract

In order to optimize and Aiming to the efficiency improvements of a solar adsorption refrigeration system. The present work evaluates the influence of the operating parameters, the solar collector location and the working pair type on the performance of a solar adsorption refrigeration system. As a test case, five sites of the solar collector in Algeria were investigated in a representative day of April. The used model for this study is the thermodynamic .Dubinin-Astakhov (D-A) model and takes into account the variation of the solar intensity and the adsorption capacity of the selected working pairs which were: AC/methanol, Zeolite/water and composite/ethanol.The performance considered in this study was the system coefficient of performance COP.The pressure-temperature-concentration (P-T-X) diagram of the selected pairs is presented for a temperature range from 27˚C to 127˚C and an adsorption process pressure of 2 bars.The maximum adsorption capacity was found to be 0.31, 0.25 and 0.62 kg of adsorbate/kg of adsorbent, respectively for the selected working pairs. Results show that the maximum COP of 0.314 was achieved with Zeolite/water while minimum COP of o.107 was achieved with AC/Methanol working pair.

31/08/2025

Renewable Energy and Sustainable Development
Vol 11, No 1 (2025)
https://apc.aast.edu/.../index.../RESD/issue/view/84/showToc

Impact of ammonia-water concentrations on solar absorption refrigeration performance
Mohammed El Amine Chikh, Mohammed Benramdane, Abdennour Aliane, Bilal Abdesselam
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1223

Abstract

Increased demand for summer comfort due to heat waves is driving the adoption of absorption refrigeration systems. These systems use free solar energy and environmentally friendly refrigerants, offering a sustainable solution despite their lower efficiency. This study investigates the effect of refrigerant ammoniac (NH₃) mass concentration on the performance parameters of a single-effect solar absorption refrigeration system using the NH3/H2O binary pair. A thermodynamic model is developed to evaluate the system’s coefficient of performance (COP) under varying generator temperatures, evaporator temperatures, and pressures. Results show that the COP increases significantly with NH₃ concentrations up to a threshold (23-25%), beyond which it stabilizes. Optimal performance is achieved at a generator temperature of 114°C, a low pressure of 1 bar, and an NH₃ concentration of 25%, yielding a maximum COP of 1.296. Additionally, the COP decreases with higher evaporator temperatures and pressures, highlighting the critical influence of thermodynamic parameters. This analysis underscores the importance of optimizing NH₃ concentrations and system operating conditions to maximize energy efficiency and facilitate sustainable cooling applications in solar-rich regions.

27/08/2025

Renewable Energy and Sustainable Development
Vol 11, No 1 (2025)
https://apc.aast.edu/.../index.../RESD/issue/view/84/showToc

Advanced integration of a switched-coupled-inductor Ćuk converter for optimized grid-connected PV application
Farid Oufqir, Mohamed Bendaoud, Fatima Ezzahra Tahiri, Khalid Chikh
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1128

Abstract

Advanced converters offer superior performance over traditional models by increasing efficiency and minimizing energy losses. However, there is a significant gap in integrating these advanced converters into grid-connected photovoltaic (GCPV) systems. This paper addresses this gap by presenting the integration of a novel ĆUK converter that combines a switched inductor (SL) with coupled inductors (CI) in a two-stage, three-phase GCPV system. The proposed system also incorporates an LCL filter to reduce harmonic distortion, while active and reactive power (PQ) control effectively manages power using a three-phase inverter. Virtual experiments were performed in SIMULINK® to evaluate the performance of the novel converter within the PV system. These simulations assessed the efficiency of the hybrid ĆUK converter compared to conventional converters, while also analyzing the impact of the turns ratio on overall system performance. The results demonstrated significant improvements in both efficiency and power quality. This study contributes to the renewable energy field by providing an analysis of advanced DC-DC converter integration, offering an optimized solution for GCPV systems.

20/08/2025

Renewable Energy and Sustainable Development
Vol 11, No 1 (2025)
https://apc.aast.edu/.../index.../RESD/issue/view/84/showToc

Challenges in low energy architecture : a case study from Egypt
Gehad A. Asran, Moustafa A. Baghdady, Adel Radwan
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1124

Abstract

Energy-efficient architecture is critical for enhancing indoor air quality and preserving occupant comfort, particularly in Egypt, where the challenges of energy consumption in the building sector are prominent.This study aims to identify barriers to the implementation of Low Energy Building (LEB) principles in Egypt and propose actionable strategies for overcoming these challenges. Using a mixed-methods approach that includes a comprehensive literature review, SPSS analysis, SWOT analysis, semi-structured interviews, and a questionnaire survey, we examined the factors limiting energy efficiency in the building sector. Our findings reveal nine significant barriers, with the most critical factors identified as design, technical solutions, expertise, and quality. The government building sector emerged as a prime candidate for intervention, highlighting the need for targeted policies to reduce energy consumption in this area. Furthermore, the study, compared the obtained results with leed,s cer-tified building (Credit Agricole bank New Cairo City, Egypt) to verify the obtained results.

30/07/2025

Renewable Energy and Sustainable Development
Vol 11, No 1 (2025)
https://apc.aast.edu/.../index.../RESD/issue/view/84/showToc

Numerical analysis of baffles on geothermal energy in a U-shaped heat exchanger PDF
Lamia Benahmed, Khaled Aliane, Brahim Rostane, Said Abboudi
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1150

Abstract

This work focuses on geothermal energy recovery using a vertical geothermal heat exchanger coupled with a heat pump for heating applications. The primary objective of this study is to conduct a 3D numerical simulation to evaluate the effects of baffles on the thermal performance of a U-shaped heat exchanger. These baffles, designed to alter flow characteristics, were implemented to enhance heat transfer and optimize overall system efficiency. The mathematical model is based on the governing equations of fluid mechanics and thermodynamics, solved using the finite volume method in the Ansys CFX software. Various baffle configurations were investigated, focusing on their placement (on the inlet and outlet tube), geometry, and the use of perforations with decreasing diameters. Simulations were conducted for a Reynolds number of Re=3600, capturing the flow behavior under specific conditions. The analysis revealed that the optimal configuration, involving baffles strategically placed on the outlet tube with decreasing perforation diameters, significantly improved thermal performance. These findings highlight the potential for designing more efficient heat exchangers in geothermal systems, paving the way for advancements in sustainable energy solutions.

22/07/2025

Renewable Energy and Sustainable Development
Vol 11, No 1 (2025)
https://apc.aast.edu/ojs/index.php/RESD/issue/view/84/showToc

A review on solar dryers to evaluate the performance and drying characteristics for agricultural products PDF
Jebaraj S., Mohammed Yahaya Khan
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1039

Abstract

In this paper, an attempt has been made to review the various researches on drying agricultural products using solar radiation in a self-consistent means in the areas of performance analysis, energy, and exergy analysis, experimental investigation, and optimization of solar dryers. Various simulation models to estimate the thermal performance and drying characteristics of different types of solar collectors have been presented. Some of the recent developments in solar drying systems are presented. Further, it is found that the dryers are classified as integral type, distributed type, and mixed-mode. Previous research by different authors proved that the drying period of agricultural products was considerably decreased by solar drying. It is concluded that this paper will be very much supportive for the researchers, academicians, scientists, and policymakers in the area of solar dryers. It is also suggested that a standard test should be developed for solar drying systems.

16/07/2025

Renewable Energy and Sustainable Development
Volume11, Issue 1 , 2025
https://apc.aast.edu/ojs/index.php/RESD/issue/view/84/showToc

Table of Contents
Articles
1. A review on solar dryers to evaluate the performance and drying characteristics for agricultural products
Jebaraj S., Mohammed Yahaya Khan
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1039

2. Numerical analysis of baffles on geothermal energy in a U-shaped heat exchanger
Lamia Benahmed, Khaled Aliane, Brahim Rostane, Said Abboudi
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1150

3. Challenges in low energy architecture : a case study from Egypt
Gehad A. Asran, Moustafa A. Baghdady, Adel Radwan
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1124

4. Advanced integration of a switched-coupled-inductor Ćuk converter for optimized grid-connected PV application
Farid Oufqir, Mohamed Bendaoud, Fatima Ezzahra Tahiri, Khalid Chikh
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1128

5. Impact of ammonia-water concentrations on solar absorption refrigeration performance
Mohammed El Amine Chikh, Mohammed Benramdane, Abdennour Aliane, Bilal Abdesselam
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1223

6. Modeling and optimization of a solar adsorption cooling system under weather conditions in Algeria
Mohammed Benramdane, Adenane Ghrici, Zakaria Sari Hassoun, Mohammed El Amine Chikh
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1224

7. Tracing live projects in architectural education: a systematic review of experiential learning practices
Mohammed Fawzi Ragheb, Rowaida Rashed, Ayat Ismail, Mohamed Abdelkarim Salheen
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1293

8. Experimental study of a flat plate air solar collector fitted with mini concentrators
Zakaria Sari Hassoun, Mohammed Benramdane, Hiba Imane Berrezoug, Khaled Aliane
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1236

9. Experimental investigation on linear fresnel reflector prototype for solar heat production
Omar Achahour, Badreddine El Ghazzani, Rachid Safoui, Aicha Eddemani, Mohamed Abbassi, Abdeslam Elfanaoui, Ahmed Ihlal
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1277

10. Intelligent hybrid method to predict generated power of solar PV system
Prashant Singh, Navneet Kumar Singh, Asheesh Kumar Singh
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1264

11. Adaptive bayesian sparse polynomial chaos expansion for voltage balance of an isolated microgrid at peak load
Sunil Kumar, Rashmi Agarwal, Harivardhagini Subhadra
DOI: https://dx.doi.org/10.21622/resd.2025.11.1.1281

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