Development of low concentrated solar photovoltaic system with lead acid battery as storage device

Salah Ud-Din Khan,Zeyad Ammar Almutairi,Omer Salah Al-Zaid,Shahab Ud-Din Khan 한국물리학회 2020 Current Applied Physics Vol.20 No.4

Energy storage system powered by renewable energies is a viable option to meet energy requirement without addition of carbon footprints to the environment. This study involves development of theoretical and computational models for a solar photovoltaic (PV) system coupled with a lead acid battery. The study commenced with selection of most appropriate lead acid battery and PV system for installation in a representative location in Riyadh, Kingdom of Saudi Arabia. Various technical and economic parameters were assessed and calculated by computational approach. The optimized lead acid battery was integrated with low concentration solar PV panels (CPV) followed by a feasibility study. Theoretical model was developed for the integrated system to calculate various parameters of the CPV and lead acid battery. Technical and economic assessment of this coupled unit was calculated using a theoretical approach. The developed model was then subjected to computational approach for verification and validation analysis of the integrated system. The detailed assessment of batteries and integrated system show the applicability of this system in Riyadh region. The research will be extended to develop energy storage systems for remote areas using lead acid batteries.

Techno-economic assessment of a very small modular reactor (vSMR): A case study for the LINE city in Saudi Arabia

Khan Salah Ud-Din,Khan Rawaiz 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.4

Recently, the Kingdom of Saudi Arabia (KSA) announced the development of first-of-a-kind(FOAK) and most advanced futuristic vertical city and named as ‘The LINE’. The project will have zero carbon dioxide emissions and will be powered by clean energy sources. Therefore, a study was designed to understand which clean energy sources might be a better choice. Because of its nearly carbon-free footprint, nuclear energy may be a good choice. Nowadays, the development of very small modular reactors (vSMRs) is gaining attention due to many salient features such as cost efficiency and zero carbon emissions. These reactors are one step down to actual small modular reactors (SMRs) in terms of power and size. SMRs typically have a power range of 20 MWe to 300 MWe, while vSMRs have a power range of 1–20 MWe. Therefore, a study was conducted to discuss different vSMRs in terms of design, technology types, safety features, capabilities, potential, and economics. After conducting the comparative test and analysis, the fuel cycle modeling of optimal and suitable reactor was calculated. Furthermore, the levelized unit cost of electricity for each reactor was compared to determine the most suitable vSMR, which is then compared other generation SMRs to evaluate the cost variations per MWe in terms of size and operation. The main objective of the research was to identify the most cost effective and simple vSMR that can be easily installed and deployed.

Antibiotic Reversal Activity of Piper longum Fruit Extracts against Staphylococcus aureus Multi-Drug Resistant Phenotype

Din Maryam Salah Ud,Gohar Umar Farooq,Mukhtar Hamid,Khan Ibrar,Morris John,Pornpukdeewattana Soisuda,Massa Salvatore 한국미생물·생명공학회 2023 한국미생물·생명공학회지 Vol.51 No.4

Irrational and injudicious use of antibiotics, easy availability of them as over-the-counter drugs in economically developing countries, and unavailability of regulatory policies governing antimicrobial use in agriculture, animals, and humans, has led to the development of multi-drug resistance (MDR) bacteria. The use of medicinal plants can be considered as an alternative, with a consequent impact on microbial resistance. We tested extracts of Piper longum fruits as new natural products as agents for reversing the resistance to antibiotics. Six crude extracts of P. longum fruits were utilized against a clinical isolate of multidrug-resistant Staphylococcus aureus.The antibiotic susceptibility testing disc method was used in the antibiotic resistance reversal analysis. Apart from cefoxitin and erythromycin, all other antibiotics used (lincosamides [clindamycin], quinolones [levofloxacin and ciprofloxacin], and aminoglycosides [amikacin and gentamicin]) were enhanced by P. longum extracts. The extracts that showed the greatest synergy with the antibiotics were EAPL (ethyl acetate [extract of] P. longum), n-BPL (n-butanol [extract of] P. longum), and MPL (methanolic [extract of] P. longum The results of this study suggest that P. longum extracts have the ability to increase the effectiveness of different classes of antibiotics and reverse their resistance. However, future studies are needed to elucidate the molecular mechanisms behind the synergy between antibiotic and phytocompound(s) and identify the active biomolecules of P. longum responsible for the synergy in S. aureus.

Testing the pollution haven hypothesis on the pathway of sustainable development: Accounting the role of nuclear energy consumption

Danish, Danish,Ud-Din Khan, Salah,Ahmad, Ashfaq Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.8

The environmental effects of China's nuclear energy consumption in a dynamic framework of the pollution haven hypothesis are examined. This study uses a dynamic autoregressive distributed lag simulation approach. Empirical evidence confirms that the pollution haven hypothesis does not exist for China; i.e., foreign direct investment plays a promising role in influencing environmental outcomes. Furthermore, empirical results concluded positive contribution of nuclear energy in pollution mitigation. From the results it is expected that encouraging foreign investment to increase generation of nuclear energy would benefit environmental quality by reducing CO₂ emissions.

Is nuclear energy a better alternative for mitigating CO₂ emissions in BRICS countries? An empirical analysis

Hassan, Syed Tauseef,Danish, Danish,khan, Salah-Ud-Din,Baloch, Muhammad Awais,Tarar, Zahid Hassan Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.12

Looking at the recent studies, nuclear energy and carbon dioxide (CO₂) emissions nexus shows inconclusive result. To further explain nuclear energy-pollution nexuses this study is an attempt to analyze the impact of nuclear energy on pollution reduction for BRICS countries covering data for the period from 1993 to 2017. This study conducts advanced panel techniques such as Continuously-Updated Fully-Modified (CUP-FM) and Continuously-Updated Bias-Corrected (CUP-BC) for long run estimation. Our results support the notion that nuclear energy reduce CO₂ emissions. Also, renewable energy corrects environmental pollution in BRICS countries. The magnitude of the coefficient of nuclear energy is less as compared to renewable energy, implying that nuclear is less effective in reducing environmental pollution. The findings offer significant policy understandings and suggestions not only for BRICS economies but for developing countries as well in designing suitable nuclear energy-growth-carbon policies.

High rate capability and long cycle stability of Cr₂O₃ anode with CNTs for lithium ion batteries

Abbas, Syed Mustansar,Ahmad, Nisar,Ata-ur-Rehman, Nisar,Rana, Usman Ali,Khan, Salah Ud-Din,Hussain, Shabbir,Nam, Kyung-Wan Elsevier 2016 ELECTROCHIMICA ACTA Vol.212 No.-

<P><B>Abstract</B></P> <P>The present study describes the synthesis of nanocomposite materials based on chromium oxide (Cr<SUB>2</SUB>O<SUB>3</SUB>) nanoparticles and carbon nanotubes (CNTs) (Cr<SUB>2</SUB>O<SUB>3</SUB>–CNT<SUB>(x%)</SUB>) by <I>in-situ</I> chemical co-precipitation method. The physical studies of these materials using a wide range of analytical techniques reveal high surface area and narrow pore size distribution of these nanocomposite materials, indicating homogenous dispersion of Cr<SUB>2</SUB>O<SUB>3</SUB> nanoparticles (particle sizes ∼20-30nm) on the surface of CNTs. The first cycle discharge capacity of 1120 <SUP> mAhg -1 </SUP> for electrodes fabricated from Cr<SUB>2</SUB>O<SUB>3</SUB> alone, which is improved for Cr<SUB>2</SUB>O<SUB>3</SUB>–CNT<SUB>(0.08%)</SUB> nanocomposite (1199 <SUP> mAhg -1 </SUP> ). This nanocomposite material achieved an overall reversible capacity of 995.3 <SUP> mAhg -1 </SUP> after 200 cycles, which can be attributed to the high surface area and the large mesoporous volume of Cr<SUB>2</SUB>O<SUB>3</SUB> nanoparticles interconnected with highly conducting network of CNTs. At higher current densities, the Cr<SUB>2</SUB>O<SUB>3</SUB>–CNT<SUB>(x%)</SUB> nanocomposite electrodes exhibited high lithium storage capacity compared to the electrode fabricated from Cr<SUB>2</SUB>O<SUB>3</SUB> nanoparticles alone. Overall, the Cr<SUB>2</SUB>O<SUB>3</SUB>–CNT<SUB>(0.08%)</SUB> nanocomposite electrode displayed high stability under varying current rates with overall high capacity retention and highest reversible capacity of 719 <SUP> mAhg -1 </SUP> at a current rate of 2000 <SUP> mAhg -1 </SUP> . This highly enhanced rate capability and excellent cycling stability of Cr<SUB>2</SUB>O<SUB>3</SUB>–CNT<SUB>(0.08%)</SUB> nanocomposite electrode can be ascribed to the synergistic effect of CNTs (anchored with the Cr<SUB>2</SUB>O<SUB>3</SUB> nanoparticles). The outcome of this study offers a possibility of improving lithium ion storage of Cr<SUB>2</SUB>O<SUB>3</SUB> nanoparticles by carefully controlling their size and shape along with the use of a suitable buffering matrix like CNTs.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>