Yazar "Asif, Mohammad" seçeneğine göre listele

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    Battery thermal management of a novel helical channeled cylindrical Li-ion battery with nanofluid and hybrid nanoparticle-enhanced phase change material
    (Pergamon-Elsevier Science Ltd, 2023) Jilte, Ravindra; Afzal, Asif; Agbulut, Uemit; Shaik, Saboor; Khan, Sher Afghan; Linul, Emanoil; Asif, Mohammad
    Electric vehicles (EVs) have emerged as a viable alternative to Internal Combustion (IC) engine-powered vehicles, and efforts have been directed toward developing EVs that are more reliable and safer to operate. The safe working of EVs necessitates the use of an efficient battery cooling system. In this paper, cooling of cylindrical type Li-ion battery embedded with helical coolant channels is proposed. The effects of nanoparticles on removing heat from the battery cooling system have been investigated for four different nanoparticle concentrations: 0, 2, 5, and 10% of Al2O3 in the base fluid. Two cases of base fluids are considered: phase change material kept in a concentric container surrounding battery volume and coolant water circulated through liquid channels attached to the outer walls of the PCM (phase change material) cylindrical container. This study presented the three configurations (i) base case PCM-WLC: battery cooling system with a cylindrical enclosure filled with RT-42 phase change material. (ii) base case nePCM-WLC: battery cooling system filled with nano-enhanced phase change material. (iii) nePCM-LC: battery cooling system with helical liquid channels and filled with nanoenhanced PCM. The nanofluid was circulated through the liquid passages connected to the PCM container. Results showed using the helical channels, the nePCM-LC arrangement efficiently removes accumulated heat from the phase change material and provides better battery cooling than straight rectangular channel-based BTMS (battery thermal management system).
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    Combustion, performance and emission discussion of soapberry seed oil methyl ester blends and exhaust gas recirculation in common rail direct fuel injection system
    (Pergamon-Elsevier Science Ltd, 2023) Sajjad, Mohammed Owais Ahmed; Sathish, T.; Saravanan, R.; Asif, Mohammad; Linul, Emanoil; Agbulut, Umit
    Research on alternative fuel production and compression ignition (CI) engine improvement techniques is more attractive recently. Waste-to-wealth concept refers that the utilization of the waste of soapberry seed and exhaust gas to run the common rail direct fuel injection type diesel engine by optimizing their contribution through experimental analysis is the novelty of this investigation. The recirculation of exhaust gas plays important role in improving the combustion in the engine, reducing the emissions, and improving the engine performance. Soapberry seed oil methyl ester economizes diesel consumption by mixing it into diesel. Transesterification is the method used to turn soapberry seed oil into biodiesel. In the common rail direct injection (CRDI) engine, a 10%, 20%, or 30% blend of soapberry seed oil methyl ester (SSOB) with diesel is utilized as fuel. For each mix, 10%- 30% of the volume of SSOB is added to the rest of the diesel. Along with these fuel types, exhaust gas recirculation (EGR) is used from 10% to 30% to test and optimize the best combinations for CRDI engines. The experimental results show that pure diesel with EGR recorded high heat release rate (HRR) and brake thermal efficiency (BTE) at the highest load possible. The maximum BTE of the tested tracks is 26.83% because of better combustion, which was achieved with 10% EGR and a combination of 30% SSOB and 70% Diesel. The increase in EGR such as 30% in 30% of SSOB with 70% of Diesel blend produced reduced NOx emission (865 ppm), smoke opacity (13%), and hydrocarbon (HC) emissions (10 ppm) than diesel fuel because of the dilution and chemical effects during combustion. Accordingly, the present research reveals that a 30% of soapberry seed oil methyl ester blend with 30% EGR is recommended for engine usage with lesser emission with better combustion and performance characteristics.
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    Experimental investigation of the thermal efficiency of a new cavity receiver design for concentrator solar technology
    (Elsevier, 2024) Alkhalaf, Qusai; Lee, Daeho; Kumar, Raj; Thapa, Sashank; Singh, Amar Raj; Akhtar, Mohammad Nishat; Asif, Mohammad
    The most popular design for solar energy receivers that achieves great thermal performance is a cavity receiver. This study experimentally compared two novel shapes of cavity receivers: conical-cylindrical-conical (CCC) and double cylindrical, with conventional conical and cylindrical designs, to examine the effectiveness of solar energy receivers. The findings indicate that the CCC shape demonstrated a higher level of efficiency, as it performed better than all other shapes that were examined. Results emphasized the influence of radiation intensity on receiver efficiency, with all shapes exhibiting improved performance at higher intensities, maximizing at 1000 W/m2. Lower friction factors were desirable for minimizing heat losses and maximizing efficiency, resulting in values of 0.078, 0.09, 0.1, and 0.12 for CCC, conical, double cylindrical, and cylindrical shapes at a flow rate of 2 L/min, respectively. The temperature differences for CCC, conical, double cylindrical, and cylindrical shapes are computed as 6.4 degrees C, 5.7 degrees C, 5 degrees C, and 4.3 degrees C, respectively. The thermal efficiencies of the CCC, conical, double cylindrical, and cylindrical shapes are computed as 86.5 %, 81.5 %, 79.9 %, and 68.9 %, respectively, at a flow rate of 2 L/min.
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    Waste bull bone based reusable and biodegradable heterogeneous catalyst for alternate fuel production from WCO, and investigation of its usability as fuel substitute
    (Elsevier Sci Ltd, 2024) Saravanan, R.; Sathish, T.; Agbulut, Umit; Sathyamurthy, Ravishankar; Sharma, Prabhakar; Linul, Emanoil; Asif, Mohammad
    Fast-growing fuel demand by an increase in diesel vehicles and diesel engine applications for various sectors motivates researchers to develop alternate fuels. Though many approaches have been proposed, this investigation is unique by producing alternate fuels from the waste cooking oil (WCO) using a biodegradable, reusable, easy-to-handle, eco-friendly, and heterogeneous catalyst developed to form the waste bull bone and characterized for alternate fuel production from WCO. The zero-waste approach, eco-friendly fuel blends, and low-cost production factors were considered. The preprocessing of WCO was carried out by the bubble washes method, followed by transesterification processing for producing biofuel. The fuel blends were tested with different ratios like 20% to 80% with diesel and short out B20 grade. Further, the blends were prepared with Diethyl ether (DEE) and Ethanol. Total eight fuels (Diesel, B20, B20 + 5 wt% DEE, B20 + 10 wt% DEE, B20 + 5 wt% Ethanol, B20 + 10 wt% Ethanol, B20 + 5 wt% Methanol, and B20 + 10 wt% Methanol) were tested including pure diesel from No load to full load engine condition at two different compression ratios (15:1 & 18:1). The results reveal that B20 + 5 wt% Methanol at 15:1 compression ratio outperformed in terms of brake power of 2.64 kW, indicated power of 6.35 kW, brake thermal efficiency of 33.21%, Indicated thermal efficiency of 67.18%, mechanical efficiency of 59.14%, low brake specific fuel consumption of 0.27 kg/kWh at full load. In conclusion, the heterogeneous catalyst obtained from the waste bull bone can be used in biodiesel production, which ensures the efficient usability of the waste bull bone in the fuel-processing sector.