Rachid Djeffal

ORCID: 0009-0002-0966-843X
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Phase Change Materials Research
  • Building Energy and Comfort Optimization
  • Solar Energy Systems and Technologies
  • Urban Heat Island Mitigation
  • Solar Thermal and Photovoltaic Systems
  • Adsorption and Cooling Systems
  • Photovoltaic System Optimization Techniques
  • Wind and Air Flow Studies
  • Climate change and permafrost
  • Refrigeration and Air Conditioning Technologies
  • Hybrid Renewable Energy Systems
  • Agricultural Economics and Practices
  • Iterative Methods for Nonlinear Equations
  • Photovoltaic Systems and Sustainability
  • Solar-Powered Water Purification Methods
  • Geothermal Energy Systems and Applications
  • Numerical methods in inverse problems
  • Soil Moisture and Remote Sensing
  • Impact of Light on Environment and Health
  • Radiative Heat Transfer Studies

Renewable Energy Development Center
2019-2024

University of Laghouat
2023

University Ferhat Abbas of Setif
2021

University of Ouargla
2021

University of Ghardaia
2019-2020

National Agency for the Development of Renewable Energy and Energy Efficiency
2019

Opaque surfaces, such as walls, are well-known for their significant contributions to heat loss and energy demands in buildings. However, transparent windows, equally critical a building's performance. The design of these elements requires careful balance various factors, including window size, glazing type, orientation, each which plays pivotal role enhancing efficiency. This study explores the optimization factors during process, emphasizing impact on overall building research evaluates...

10.1016/j.csite.2024.104902 article EN cc-by-nc-nd Case Studies in Thermal Engineering 2024-08-01

Summary Phase change materials (PCMs) have been extensively used for thermal storage systems in buildings. To enhance the building's and energy performance, PCMs can be embedded into envelope to reduce cooling heating demand. A PCM's melting temperature close comfort range (20°C‐26°C) potentially an attractive solution. In this work, performance of a building Saharan climate, specifically Ghardaïa Algeria, was modeled using TRNSYS‐18 simulation package. newly developed module (Type‐285)...

10.1002/er.6951 article EN International Journal of Energy Research 2021-06-22

The solar water heater can be integrated into future residential buildings as the main energy source, which will subsequently reduce cost of heating. An original configuration for an efficient Domestic Hot Water (DHW) storage tank is developed and experimentally evaluated under Saharan climate. This novel DHW includes a hybrid (solar electric) system with flat plate collector coupled electric heater. Additionally, phase change material (PCM) mixture that composed paraffin wax animal fat...

10.3390/buildings13030635 article EN cc-by Buildings 2023-02-27

This article examined the effectiveness of bioclimatic strategies to enhance thermal comfort and decrease energy consumption in a desert-climate residence. The study assessed impact insulation, natural ventilation, phase-change materials (PCMs) over year, with each strategy evaluated both independently combination. Monthly bills were analyzed determine these strategies. results indicated substantial reductions costs, decreases up 50% during transitional seasons; however, complete elimination...

10.18686/cest.v2i3.177 article EN cc-by Clean Energy Science and Technology 2024-08-19

Most thermal researchers have solved conduction problems (inverse or direct) using several different methods. These include the usual discretization methods, conventional and special estimation in addition to simple synchronous gradient methods such as finite elements, including quantitative Quantities found through difference i.e., explicit, implicit Crank–Nicolson scheme method, also been adopted. offer many disadvantages, depending on cases; when solutions converge, limited range...

10.3390/buildings13010243 article EN cc-by Buildings 2023-01-15

本文探讨了生物气候策略在提高沙漠气候住宅的热舒适度和降低能源消耗方面的有效性。研究评估了在一年时间内隔热、自然通风和相变材料(Phase Change Materials,PCM)的影响,并分别对每种策略进行独立和组合评估。通过分析每月的能源消耗费用,确定了这些策略的影响。结果表明,能源成本大幅降低,在过渡季节降低高达50%;然而,由于室内外环境之间存在显著的热相差,完全消除加热和冷却系统并不可行。对热不适时间的进一步分析表明,在特定季节增加隔热层厚度可以减轻峰值热强度并延迟其发生,从而延长舒适期并减少不适时间。尽管有这些改进,但在最热的月份仍然存在热困扰期,这进一步表明了采取平衡的气候适应策略的必要性。总体而言,尽管这些策略的实施无法完全消除对传统供暖和制冷系统的需求,但它们在提高沙漠气候家庭的舒适度并降低能源的消耗方面展现出了有效性。

10.18686/cncest.v2i3.223 article ZH-CN 清洁能源科学与技术 2024-08-19

For any new applicable and profitable investment in the thermal field of region, we aim to eliminate or renovate conventional heating air conditioning systems with systems, which will work energies renewable.First, you need know climate characteristics these regions.In this study, determine diagnosis arid semi-arid regions, taking Ghardaï a as an example.These concerns conditioning, heating, cold, ventilation, water, for all this, use data from two weather stations located on Terrace our...

10.18280/ijsdp.160602 article EN International Journal of Sustainable Development and Planning 2021-10-31

This paper designs a novel estimation model for the temperature of limestone soil, which is abundant in Ghardaia Sahara Algeria.The was developed based on radial basis function (RBF), and used to predict soil heat two inputs, namely, air solar radiation.The raw data were collected over more than three years by meteorological station study area.For comparison, also measured probes arranged at an equal interval.The predicted our contrasted with results field measurement.On this basis, thermal...

10.18280/i2m.180509 article EN Instrumentation Mesure Métrologie 2019-11-11

The main objective of this research is to design an improved refrigeration system incorporating a phase change material; experimental measurements have been carried out reduce energy consumption.The adopted method was based on the comparison two cases: first corresponded classical cell and second concerned isolated with material (PCM) eutectic plates.An saving up 12.88% has recorded.In event leaks, operation will subsequently generate over-consumption which estimated at 22.03% compared...

10.18280/i2m.190101 article EN Instrumentation Mesure Métrologie 2020-03-20

The compactness of a building depends on its shape, size and contact properties.The main objective this contribution is to investigate the impact building' height energy needs.The assessment criteria will be based well-defined lifestyle occupancy scenario, indoor comfort temperature required consumption.The results obtained from regression models their relative simplicity allows them used as tool for estimating needs, savings investment-return time.The absence insulation would result in an...

10.18280/mmc_c.802-405 article EN Modelling Measurement and Control C 2019-12-30

The solar water heater must be integrated into future residential buildings as the main energy source, which will subsequently reduce cost of heating. An original configuration for efficient Domestic Hot Water "DHW" storage tank is developed and experimentally evaluated under Saharan climate. This novel DHW includes a hybrid (solar electric) system with flat plate collector coupled an electric heater. Additionally, phase change material "PCM" mixture that composed paraffin wax animal fat...

10.20944/preprints202212.0095.v1 preprint EN 2022-12-06

In single-story buildings, the roof is section of building that receives most sunlight and hence heat in summer, making shading difficult. As a result, it critical to limit this gain by careful design construction, whether through shade, insulation, or thermal mass.The use phase change materials (PCM) buildings helps reduce energy reliance allowing for latent storage enhance inertia without increasing building's weight considerably.The incorporation MCP into structure has potential increase...

10.1109/sienr50924.2021.9631908 article EN 2021-10-13

Rational Sizing of solar array and battery storage in a standalone photovoltaic (PV) system is investigated. Based on the selection from two types PV modules with their various peak power cost also batteries capacity cost, finally for choosing bank at lower by using MATLAB software. Mathematical approach was presented optimal sizing components addition to total capital system. As result, composed 10 monocrystalline that yields most cost-effective among 16 considered systems, optimized size...

10.1109/irec59750.2023.10389184 article EN 2023-12-16

The aim of this study is to approximate the thermal comfort in home by judicious use building materials and reinforcement envelope insulation using eco materials. Our task was investigate minutely construction that are specific site commercially available on Algerian market under hot climatic conditions. EnergyPlus software used for energy simulation with "OpenStudio plugin SketchUp" as an interface. Results indicate most suitable material terms cold seasons even brick. allowed us discover...

10.1088/1755-1315/214/1/012118 article EN IOP Conference Series Earth and Environmental Science 2019-01-23

This work focuses on a comparative study between two residential buildings; one conventional (inefficient and uncomfortable) house the other more low-energy in block subjected to complicated climatic conditions. The findings further suggest that deployed concepts should be based rational use of energy, good insulation practice: by optimizing thermal performance opaque transparent walls (walls, windows doors) eliminating bridges, passive heating living spaces using solar gains better...

10.1109/irsec48032.2019.9078200 article EN 2021 9th International Renewable and Sustainable Energy Conference (IRSEC) 2019-11-01
Coming Soon ...