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132 articles for “rate of heat transfer”
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Estimation of Heat Transfer Rate with Conjugate Gradient Method
Abstract: In thermal system, a considerable amount of heat leftovers with the exhaust flue gases. Appropriate arrangement to recover this waste heat may contribute to the enhancement of overall utilization of the energy supplied to the thermal system. In this study, heat transfer rate is approximately determined using inverse heat transfer concept. Simulated temperature readings have been taken at the measurement location on the mild steel rod. Conjugate gradient method (CGM) …
Published in Journal of Experimental & Applied Mechanics · Vol. 9, Issue 1, 2018 · pp. 1–8 Read article
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Enhancement in Heat Transfer Rate of Plate Fin Heat Exchanger using Triangular Winglets
Abstract: AbstractHeat transfer enhancement in heat exchanger leads to higher saving in terms of manufacturing and operational costs. However, parameter pertaining to pressure drops needs to be effectively analyzed so as to make a balance between pressure drop and effectiveness against the operation costs. This paper focuses on the use of triangular winglets in plate fin heat exchangers to enhance the rate of heat transfer. An obstacle is provided in the …
Published in Journal of Thermal Engineering and Applications · Vol. 5, Issue 1, 2018 · pp. 6–11 Read article
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Enhancement in Heat Transfer Rate in a Pipe in Pipe Heat Exchanger Using Helical Insert
Abstract: AbstractHeat transfer enhancement techniques are frequently used in heat exchanger system in order to increase the rate of heat transfer and improve the thermal performance of the system. This paper contains experimental study on enhancement in heat transfer rate using helical insert. The inner tube used was of copper with inner and outer diameter of 11.8 mm and 12.7 mm, respectively, and outer tube was galvanized iron, which was insulated …
Published in Journal of Thermal Engineering and Applications · Vol. 5, Issue 2, 2018 · pp. 5–12 Read article
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CFD Investigation of Volume Fraction of Nanofluid on Heat Transfer Rate in Micro Channel Heat Sink
Abstract: AbstractNew methods of removing heat from integrated chips of the electrical devices are very important. Mini channel liquid cooling is the new method by which we can remove heat from electrical devices easily. Uses of nanofluid in the mini channel liquid cooling is the experiment study. We investigated the effect of nanofluid on the heat transfer rate. We also investigated the effect of volume fraction of a nanofluid in the …
Published in Recent Trends in Fluid Mechanics · Vol. 4, Issue 3, 2017 · pp. 1–8 Read article
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A Review on Increases the Heat Transfer Rate of the Solar Air Heater by Adding the Fins in the Absorber Plate
Abstract: Solar air heaters are extensively utilised in a diverse range of domestic and industrial settings. The need to enhance the thermal efficiency of solar air heaters has prompted researchers to concentrate on enhancing the thermal performance through the implementation of artificial flow modification techniques in the flow field. Consequently, the presence of this phenomenon will disrupt the laminar sublayer located beneath the absorber plate, so contributing to an elevation in …
Published in Trends in Machine design · Vol. 10, Issue 3, 2023 · pp. 8–16 Read article
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Experimental Investigation of Heat Transfer Rates in Water Coils Under Various Flow Conditions
Abstract: This study investigates the influence of various flow conditions on heat transfer rates in water coils through experimental analysis. Water coils, crucial for efficient thermal management in industrial applications, were tested under different flow rates and orientations to assess their impact on heat transfer performance. The experiment involved measuring heat transfer coefficients and pressure drops for coils subjected to flow rates ranging from 0.5 to 5 L/min and comparing results …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 11, Issue 2, 2024 · pp. 36–42 Read article
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Enhancement of Heat Transfer Rate in Cooler by using Nanofluid
Abstract: The paper aims at the study of the cooling system in the household cooler by replacing honeycomb meshing into the radiator. Heat transfer from the radiator can be improved by maximizing the heat transfer area and increasing the heat transfer rate. In this paper, it is focused on increasing heat transfer rate by using MgO nanoparticles in suspension. A Thermophysical property has been increased in heat transfer material. Water was …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 6, Issue 3, 2019 · pp. 1–11 Read article
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Optimization of Procedure and Variables of a Double Pipe Composite Heat Exchanger with Protruding Surfaces
Abstract: Under low heat duty conditions, double pipe heat exchangers are employed. When utilized for heavy-duty tasks, they show limitations. To use double pipe heat exchangers for heavy-duty applications, heat transmission needs to be increased. In this project, we are investigating the optimization process parameters of a twin pipe heat exchanger with and without protruding surfaces. In both cases, the inner and outer tubes are composed of steel, and the working …
Published in Journal of Polymer & Composites · Vol. 13, Issue 3, 2025 · pp. 472–485 Read article
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Mathematical Modelling on Unsteady Blood Flow and Unsteady Heat Transfer Through a Stenosed Artery with Hematocrit and Slip Velocity
Abstract: A theoretical investigation concerning variable viscosity dependent on percentage concentration of red blood cell interm of total volume of blood (hematocrit) and slip velocity on unsteady flow of blood and heat transfer has been carried out. The analytical expressions for the flow characteristics and the heat transfer rate, including the velocity profile, volumetric flow rate, flow resistance, wall shear stress, and temperature profile, were obtained using the weighted residual method, …
Published in Research & Reviews: Discrete Mathematical Structures · Vol. 12, Issue 2, 2025 · pp. 16–36 Read article
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Review of Thermal Performance of Solar Air Heaters: Influence of Composite Materials and Advanced Thermal Storage Techniques
Abstract: Solar air heaters (SAHs) are essential devices for capturing solar energy and converting it into heat, finding applications in steam generation, refrigeration, agricultural drying, and space and water heating in residential and commercial environments. However, the thermal performance of SAHs is often limited by the low heat transfer coefficient of air and the absence of solar energy during nighttime, impacting efficiency and reliability. To address these challenges, this study explores …
Published in Journal of Polymer & Composites · Vol. 13, Issue 5, 2025 · pp. 488–506 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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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 is performed to illustrate the effects of cooling rate, heat transfer rate, heat transfer coefficient of the plate when the jet hole diameter is changed from 5 to 8 mm. It means that changes in Reynolds number (Re) and Nusselt number (Nu) show corresponding changes in air velocity. Select the jet to target plate distance nine times diameter …
Published in Recent Trends in Fluid Mechanics · Vol. 3, Issue 2, 2016 · pp. 44–52 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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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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Experimental Analysis of Concentric Heat Exchanger with Dimpled Tube
Abstract: In this work, an experimental and CFD analysis of concentric heat exchangers with smooth andspherical dimple pipes in different mass streams with water as a working medium is presented.Heat transfer technology refers to various methods used to increase the heat transfer ratewithout significantly affecting the overall system performance. Over the past decade, severalstudies have reported indirect technology for heat transfer. The present study on the change ofthe inner tube to …
Published in Journal of Thermal Engineering and Applications · Vol. 7, Issue 3, 2020 · pp. 7–12 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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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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Assessment of Engine Performance with Perforated and Solid Fins
Abstract: Abstract Fins increases the heat transfer from a heat generated device by increasing the surface area of it. Fin with holes or perforated fins increases the surface area available for heat removal but also increases the intensity of the air flow, which further increases the heat removal. A two wheeler engine with fins having circular perforation has been designed in the present work. ANSYS 16.0 has been utilized to solve …
Published in Journal of Thermal Engineering and Applications · Vol. 3, Issue 3, 2016 · pp. 1–7 Read article