Heat transfer performance of a deep ground heat exchanger
Chao Jiang a,Ruitao Yang b,Xueming Hou b Add to Mendeley A comprehensive elucidation of heat transfer physics in latent heat A review of the recent advances in the heat transfer physics
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Heat transfer coefficient: a review of measurement techniques
Due to the importance of the experimental measurements for the Heat Transfer and Temperature Change. A practical approximation for the relationship between heat transfer and temperature change is: \[Q = mc\Delta T,\] where \(Q\) is the symbol for heat transfer (“quantity of 1.5: Heat Transfer, Specific Heat, and Calorimetry
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Heat transfer Definition & Facts Britannica
Heat transfer, any or all of several kinds of phenomena, considered as mechanisms, that convey energy and entropy from one location to another. The specific mechanisms are usually referred to as For heat transfer purposes, the coefficient is multiplied by ρC—the heat capacity of the A general approach for predicting convective heat transfer
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Experimental and numerical investigations on heat transfer
Thus, in this work heat transfer by radiation was neglected and the Direct numerical simulations of the flow and forced convective heat Numerical investigation of forced convection heat transfer
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A comprehensive review of methods of heat
A wide range of studies was conducted to increase the heat transfer rate and reduce the size and cost of shell and tube heat exchangers (STHE). The paper’s contributions lie in its ability to provide The maximum shell side heat transfer coefficient of 2265 W/m 2 K with pressure drop penalty of 91 kPa. Detail analysis of solid rectangular fins is presented in Cengel [9]. Pise and Awasarmol [10] performed comparative study of heat transfer enhancement with solid and permeable fins on cylinder block under natural convection Experimental investigation of heat transfer enhancement by
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Heat transfer and interfacial flow physics of ScienceDirect
The range of gravitational accelerations and body-force-induced acceleration (>1 g e) that are important for studying two-phase flow and heat transfer in space and aircraft applications is shown in Fig. 1, with several specific examples.While most two-phase flow and heat transfer physics are well understood in Earth gravity, these d : A third factor in the mechanism of conduction is the thickness d of the material through which heat transfers. The figure above shows a slab of material with different temperatures on either side. Suppose that T 2 is greater than T 1 ,so that heat is transferred from left to right.Heat transfer from the left side to the right side is accomplished by a series of What is thermal conductivity? (article) Khan Academy
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Heat transfer and film cooling effectiveness on the squealer
The heat/mass transfer coefficients on the blade tip were about 1.7 times higher than those on the blade surface and shroud. Furthermore, the heat/mass transfer on the blade tip for the rotating chase was about 10% lower than that for the stationary case due to reduced leakage flow with the relative motion.Experimental investigations were performed to measure the detailed heat transfer coefficients and film cooling effectiveness on the squealer tip of a gas turbine blade in a five-bladed linear cascade. The blade was a two-dimensional model of a first stage gas turbine rotor blade with a profile of the GE-E3 aircraft gas turbine engine rotor blade. The Heat Transfer Coefficients and Film Cooling Effectiveness on
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A general approach for predicting convective heat transfer
For heat transfer purposes, the coefficient is multiplied by ρC—the heat capacity of the fluid—to recover a convective heat transfer coefficient. Eqs. (13) All simulations are performed using M-Star CFD Version 3.9.32 [29]. M-Star CFD is a computational physics software that models transient/three-dimensional transport physics.Agitated vessels (or mechanically stirred reactors) are heat exchange devices that are most widely used in many chemical and biochemical process industries, such as anaerobic digestion process. The mixing and heat transfer performances in these vessels are of crucial importance for increasing the energy efficiency in both batch and Processes Free Full-Text An Investigation of Heat Transfer
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Heat transfer coefficient: a review of measurement techniques
Heat transfer coefficient is a basic parameter used in the calculation of convective heat transfer problems. Due to the importance of the experimental measurements for the development of convective heat transfer, this review identifies, classifies and describes the experimental methods used for the measurement of heat Since a heat exchanger used in a gas generator of an open-cycle liquid rocket engine was operated in a high-temperature environment, the coupled analysis for heat transfer characteristics and structural integrity should be performed simultaneously. For these reasons, a numerical analysis of the heat exchanger in a liquid rocket engine was Aerospace Free Full-Text Characteristics of a Heat
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A Summary of the Cooled Turbine Blade Tip Heat Transfer
The clearance gap between the stationary outer air seal and blade tips of an axial turbine allows a clearance gap leakage flow to be driven through the gap by the pressure-to-suction side pressure difference. The presence of strong secondary flows on the pressure side of the airfoil tends to deliver air from the hottest regions of the mainstream Developing a compact vaporizer with high thermal efficiency is of great significance to the storage and usage of Liquid Natural Gas (LNG). Numerical simulations were performed to investigate the flow and heat transfer characteristics of supercritical pressure methane in a vertical tube, and primary focus was to reveal the mechanism of Analysis and prediction of heat transfer deterioration of supercritical
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Principle of Heat Transfer ResearchGate
The three methods of heat transfer are thermal conduction, thermal radiation, and thermal convection (Hartnett and Rohsenow, 1998; Kreith, 1997; Siegel, 1981). Thermal radiation does not require aCalculate the mass of water. Because the density of water is 1000kg / m3, 1 L of water has a mass of 1 kg, and the mass of 0.250 L of water is mw = 0.250kg. Calculate the heat transferred to the water. Use the specific heat of water in Table 12.4.1: Qw = mwcwΔT = (0.250kg)(4186J / kgoC)(60.0oC) = 62.8kJ.12.4: Heat Transfer, Specific Heat, and Calorimetry
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OS-T: 1080 Coupled Linear Heat Transfer/Structure Analysis
A linear steady-state heat conduction solution is defined first. Then it is referred by a structure solution by TEMP to perform the coupled thermal/structural analysis. The problem is defined in HyperMesh and solved with OptiStruct implicit solver. The heat transfer and structure results are post processed in HyperView.Heat transfer correlations and experimental data for forced convective heat transfer in vertical and horizontal pipes have been published Several CFD studies with complex heat and mass transfer analysis were performed using criteria of solution residuals and satisfactory results were reported (Cornelissen et al., Citation 2007Experimental and numerical investigation on convective heat transfer
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Asymmetric Heat Transfer in Aircraft Electrothermal Anti-Icing
Aircraft icing is an important cause of air disasters, and electrothermal anti-icing is a common protection method. In this work, the influence of icing meteorological conditions on the anti-icing was studied through an icing wind tunnel experiment on the fairing. Based on the finite volume method, a transient heat transfer calculation method In 1995, V. Rammohan et al. [5] performed an interferometric study for a horizontal fin array to acquire the natural convection properties and calculated the integro-differential equations numerically to acquire the radiation properties. They analyzed the geometry effect on the radiation heat transfer and also found that the radiationAnalysis of enhanced heat transfer on a passive heat sink
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Heat transfer and fluid flow characteristics in a plate heat
The heat transfer coefficient is enhanced by 20.23%, 29.37%, and 40.28% for PHECF with a pore density of 30 PPI, 40 PPI, and 50 PPI as compared to a plate heat exchanger. The experiment is performed with a Reynolds number ranging from 1200 to 2000 and copper foam pore density ranging from 30 to 50 pores per inch (PPI). The CFD modellings of heat transfer behaviors during geyser boiling were performed using both the improved and original Lee model based on VOF method. ranges. During the tests, the flow rates and temperature of heating and cooling water are controlled constant. The heat transfer behaviors of bubble growth in evaporator is A combined CFD/visualization investigation of heat transfer
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