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318 articles for “Heat rate”
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Analysis of Performance Enhancement in a Bubble Driven Inertial Micropump
Abstract: A nozzle-diffuser pair is incorporated into a conventional micro-bubble based micropump system and its implications on the performance is evaluated. The proposed model induces flow rectification due to the additional net pressure head acting on account of the nozzle-diffuser pair provided at the ends of the micro channel. An analytical model is used to study the effect of nozzle-diffuser pair on the pump performance and plots of bubble interfacial position …
Published in Journal of Mechatronics and Automation · Vol. 2, Issue 3, 2015 · pp. 16–23 Read article
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Optimizing Heat Transfer Performance in CO2 Finned-Tube Gas Coolers: A Comparative CFD Study of Design Variations
Abstract: Computational fluid dynamics (CFD) simulations and mathematical analysis are used in this study to examine the heat transfer efficiency of CO2 fined tube gas coolers. To maximize heat transfer efficiency, CFD simulations were carried out on a variety of gas cooler designs with variable fin geometry, including offset strip fins, using the ANSYS Fluent program. Under the baseline design, there was a finned tube cooler measuring 610 mm in length, …
Published in Recent Trends in Fluid Mechanics · Vol. 11, Issue 3, 2024 · pp. 1–13 Read article
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A Novel Approach in the Formulation of a Direct Contact Heat Exchanger
Abstract: Normal 0 false false false EN-US X-NONE X-NONE The paper is concerned with the development of a mathematical approach for a direct contact heat exchanger. An air washer has been considered for the analysis and a one dimensional model using mass and energy balance equation has been developed. The new solution presented for the model shows an excellent agreement with the literature available in the air conditioning. The effect on …
Published in Trends in Mechanical Engineering & Technology · Vol. 1, Issue 2-3, 2011 · pp. 1–8 Read article
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Thermal degradation analysis of banana fiber by Coats & Redfern methodThermal Degradation Analysis of Banana Fiber by Coats and Redfern Method
Abstract: Nowadays, natural fiber is more advantageous than synthetic fiber. Natural fibers are used as reinforcement material with combination of polymer matrix. These are of different types like banana fiber, bamboo fiber, sisal, hemp, and jute, etc. Banana fiber is one of them which is most common and easily available fiber in global scenario. It is biodegradable, renewable, and lower in cost. This fiber is higher in cellulosic content. Out of …
Published in Journal of Polymer & Composites · Vol. 11, Issue 2, 2023 · pp. 28–32 Read article
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A Review on Slow Pyrolysis by using Fixed Bed Pyrolyzer using Different Biomass
Abstract: This paper presents the literature survey of slow pyrolysis; an economical thermochemical process to produce bio-oil. In slow pyrolysis, the low temperature (up to 500°C), low heating rate and longer vapor residence time (up to 30 min) which produced 25 to 45% bio-oil, bio-char 35 to 50% and pyro-gas 30 to 50%. Pyrolysis yield such as bio-oil, bio-char and pyro-gas depends on temperature, heating rate, sweeping gas effect, initial moisture …
Published in Journal of Thermal Engineering and Applications · Vol. 3, Issue 2, 2016 · pp. 18–21 Read article
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Fire Accidents and Mitigation Framework of Electric Vehicles in India
Abstract: Over the past decade, electric vehicles (EVs) have profoundly reshaped the global automotive industry, primarily due to significant advancements in lithium-ion (Li-ion) battery technology. However, the safety implications associated with high-energy Li-ion batteries, particularly the risk of fire, have emerged as a significant concern for EVs. This article focuses on recent developments in EV fire safety, particularly concerning thermal runaway and battery fires in Li-ion batteries. Instances of extreme misuse, …
Published in Journal of Industrial Safety Engineering · Vol. 11, Issue 2, 2024 · pp. 25–30 Read article
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Review Paper on Experimental Investigation of the Impingement Cooling for Single Stationary Flat Plate in Case of Laminar Flow
Abstract: In this paper, impingement cooling on single stationary flat stainless steel plate in which we illustrate the effects of cooling rate, heat transfer rate, and heat transfer coefficient of plate when jet hole diameter changes from 5 to 8 mm; it means that there are changes in Re and Nu number and corresponding changes in air velocity. Select the jet to target plate distance as 9D, where D=diameter of the …
Published in Recent Trends in Fluid Mechanics · Vol. 3, Issue 2, 2016 · pp. 36–43 Read article
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Design, Fabrication and Testing of Ejector for Solar Thermal Cooling System
Abstract: The Solar Thermal Cooling System mainly comprises of Solar Panels, Generator, Condenser and Evaporator. In addition an ejector is mounted in the existing system to improve the performance of the system. The Ejector is having a primary and secondary inlet nozzle. In the primary flow nozzle the motive refrigerant will flow with high pressure which comes from generator. The area of the ejector is reduced to increase the pressure by …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 7, Issue 1, 2020 · pp. 12–20 Read article
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Experimental Investigation on Performance of Vapor Compression Refrigeration System using Nanorefrigerant (R134a+Al2O3) with/without Evaporative Condenser
Abstract: In traditional refrigeration system the main focus of researchers is always to improve its performance by reducing work of compression and enhancing the heat transfer rate in different heat exchangers and this can be achieved by adopting suitable technique. In this research work experiment is carried out on vapor compression refrigeration test rig using nanorefrigerant of R134a as base refrigerant and nanoparticles of aluminium oxide Al2O3 in different concentration so …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 7, Issue 3, 2020 · pp. 1–8 Read article
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An Experimental Study to Determine Optimum Machining Conditions for Electrical Discharge Machining of the Heat Treatable Steel 42CrMo4 (Din 1.7225)
Abstract: Electric discharge machining (EDM) is a well-established machining option and a non-traditional machining process, in many manufacturing-related industries worldwide. It is found to be capable of machining geometrically complex or hard material components, which are specific and difficult-to-machine. In this study, the electrical discharge machining of 42CrMo4 with different electrode materials namely, copper, aluminum and tungsten carbide and process parameters was performed to explore the influence of EDM parameters on …
Published in Journal of Mechatronics and Automation · Vol. 2, Issue 2, 2015 · pp. 23–32 Read article
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Analysis of the Fraction of Mass Flow Rate on the Performance of Double Flow Solar Air Heater
Abstract: This paper presents a mathematical model of a double flow solar air heater, in which air is flowing simultaneously over and under the absorbing plate. Based on the energy balance equations, the effect of fraction of mass flow rate in the upper or lower flow channel has been investigated analytically. The results show that there is air temperature rise, heat gain and efficiency has the maximum value when the optimal …
Published in Journal of Thermal Engineering and Applications · Vol. 4, Issue 2, 2017 · pp. 18–26 Read article
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Analysis of Thermo Hydraulic Performance of Artificial V-Rib Roughness of Solar Air Heater: A Review
Abstract: Solar air heaters (SAHs) are the simplest energy conversion device which transforms incoming solar radiation to thermal energy. In traditional SAH the convective heat transfer rate is low. To improve heat transfer rate the artificial rib roughness is employed on the absorber plate. Although rib roughness increases the heat transfer rate, as well as the pressure drop due to friction. So in order to achieve maximum increment in thermo hydraulic …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 9, Issue 1, 2022 · pp. 18–28 Read article
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Experimental Investigation of Double Pipe Heat Exchanger to Improve Thermal Performance, By Using Cerium Oxide (CeO2) Nanofluid
Abstract: Heat exchanger is a device which is very important in every modern industry. Cerium Oxide is used as a nanofluid in this research paper which is made by mixing Cerium Oxide (CeO2) and water. The thermal performance analysis of double pipe heat exchanger is performed by changing the composition of Cerium Oxide nanofluid . At different flow rates (7, 8, 9 litres/min) of nanofluid, flow volume concentration (2%, 3%, 4%) …
Published in Recent Trends in Fluid Mechanics · Vol. 8, Issue 3, 2021 · pp. 24–31 Read article
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Optimization of Performance of Shell and Tube Heat Exchanger with Al2O3 Nanofluid as Working Fluid
Abstract: Heat exchangers are used to transfer heat between two process streams. Improving the rate of heat transfer as well as minimizing the pressure drop is one of the promising fields to focus on. Nanofluids with better thermo-physical properties can increase the heat transfer rate. In the present study, thermo-physical properties of Al2O3 nanofluid are compared with base fluid at different temperatures and the variation of heat transfer coefficient, output temperature …
Published in Recent Trends in Fluid Mechanics · Vol. 2, Issue 2, 2015 · pp. 18–25 Read article
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A Review on Roughened Solar Air Heater for Heat Transfer and Thermal Efficiency
Abstract: The use of artificial roughness on the absorber plate is the most effective technique to enhance the thermal performance of solar air heaters. Experimental investigation of distinct roughness geometries shows that the enhancement in the rate of heat transfer is accompanied by considerable rise in temperature. In this paper some distinguished roughness geometries have been compared on the basis of heat transfer rate and thermal performance. The objective of this …
Published in Journal of Experimental & Applied Mechanics · Vol. 6, Issue 1, 2015 · pp. 49–56 Read article
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Effect of Sol-Gel Coating on Fire Performance and Optical Properties of Wood Panels
Abstract: Investigates the impact of sol-gel coating on the fire performance and optical properties of wood panels.SEM, EDX, and infrared spectroscopy with the Fourier transform were used to characterize the sol-gel coating, which was put on to the wood panels using a dip-coating technique. The fire performance of the coated and uncoated wood panels was evaluated by measuring the ignition time, flame spread rate, and total heat release rate. The optical …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 10, Issue 1, 2023 · pp. 20–24 Read article
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Design and Thermal Analysis of Fins for Air Cooled Engine by Varying its Geometry
Abstract: An air-cooled motorcycle engine releases heat to the atmosphere through the mode of convection to facilitate this, fins are provided on the outer surface of the cylinder. The cooling fins allow the wind to move the heat away from the engine. The heat transfer rate depends upon the velocity of the vehicle, fin geometry and the ambient temperature. Low rate of heat transfer through fins is the main problem of …
Published in Trends in Machine design · Vol. 5, Issue 3, 2018 · pp. 37–53 Read article
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Numerical Investigation of Influence of Rate of Rotation on Formation of Vapor Around Two Heated Circular Cylinders Immersed in Water Inside a Channel
Abstract: AbstractThe complexity problem of fluid flow and heat transfer over an array of circular cylinders are common in industrial applications of the fluid dynamics. The complex nature of the problem encountered in industry, gives rise to certain significant dimensions in the fluid dynamics theory. Some of them are the fluid flow interaction, interferences in flow and vortex dynamics which are typically found in compact heat exchangers, cooling of electronic equipment, …
Published in Recent Trends in Fluid Mechanics · Vol. 4, Issue 3, 2017 · pp. 14–25 Read article
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Improved Cooling Effectiveness in Radiators and Heat Exchangers with Nanofluid-Based Technology
Abstract: This study discusses how the process of heat transfer in radiators and heat exchangers can be improved using nanofluids and analysis of computational fluid dynamics. These nanofluids comprise Al₂O₃ and ZnO dispersed in water-based ethylene glycol solutions, and graphene oxide dispersed in water-based solutions, and performance evaluation was done for the range of flow rates 180–420 l/h. And a 3D CAD model was created using the ANSYS Workbench. It was …
Published in Recent Trends in Fluid Mechanics · Vol. 12, Issue 1, 2025 · pp. 31–62 Read article
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Review of the Impact of Artificial Roughness in Solar Air Heaters
Abstract: Artificially roughening the heated surface of solar air heaters is a practical and affordable method to significantly increase the rate of heat transmission. Roughing up the surface can improve the design of a solar air heater (SAH) duct. The use of baffles, fins, ribs and grooves improves heat transmission in the SAH. Various efforts were made to improve heat transfer rates through duct employing these components, which resulted in significant …
Published in Trends in Machine design · Vol. 11, Issue 1, 2024 · pp. 1–9 Read article