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Showing 1 to 20 of 34 for “"Tube heat exchanger"”.
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Spiral tube heat exchanger for liquid metal
The development of a heat transfer conversion system utilizing liquid metals has been the object of the investigations with which I have been associated on my present duty with the General Electric Company, Schenectady, New York. The major problems involved have been the design of the components of …
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Design of Shell and Tube Heat Exchanger
… a lot of factors affect the performance of the heat exchanger and the optimization obtained by the formulas depicts the cumulative effect of all the factors over the performance of the heat exchanger. It is observed that by changing the value of one variable then by keeping the rest variable as …
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Parametric and nonparametric identification of shell and tube heat exchanger mathematical model
… and nonparametric models of a shell and tube heat exchanger are studied. Such models are very important because they provide information about controlling a system operation. Without the model, the control task would be difficult for tuning of controller. For many years, researchers have …
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Local heat transfer coefficient in a baffled shell and tube heat exchanger
… in the end conpartments of a model shell and tube heat exchanger have been made using an electrochemical technique. Limited data are also reported far the second compartment. The end compartment average coefficients have been found to be smaller than reported data for a corresponding internal …
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Development of a hybrid heat source radiant system using an embedded concentric tube heat exchanger
… space thermal environment control system using a heated or cooled surface of building components such as floor, wall, and ceiling. The systems have been reported to have advantages in improving occupants’ thermal comfort and reducing heating and cooling energy consumption. Although the system has …
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Performance measurement and visualization on the refrigerant distribution in the vertical manifold of the microchannel tube heat exchanger
This project studies the liquid refrigerant distribution of an intermediate vertical manifold in a multi-pass evaporator. A new test rig is designed and built to circulate R410A through the vertical microchannel manifold. Refrigerant is circulated into the manifold through the lower set of parallel …
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The determination of a water film coefficient and a condensing steam film coefficient for a single tube heat exchanger
… condensing steam film coefficients for a single tube heat exchanger. A shell and tube apparatus was constructed and these coefficients were determined by Wilsons graphical method. Test runs were made at various pressures and water velocities. It was determined that for flow through a horizontal …
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Preliminary design and integration procedures for gas turbine intercoolers on naval combatants
… The indirect system is comprised of two types of heat exchangers; an air to ethylene glycol, plate fin heat exchanger, and an ethylene glycol to seawater shell and tube heat exchanger. The direct system utilizes an air to seawater shell and tube heat exchanger. The analysis requires, as input, air …
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Numerical Study of Convective Heat Transfer in Flat Tube Heat Exchangers Operating in Self-Sustained Oscillatory Flow Regimes
… constant-property numerical simulations of flat tube heat exchanger devices operating in flow regimes in which self-sustained oscillations occur were performed. The unsteady flow regimes were transition flow regimes characterized by cyclic variations of flow parameters such as stream-wise or …
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Enhancing the heat transfer performance of compact heat exchangers by minimizing the contact resistance between fins and tubes
… phenomena. It plays a significant role in heat transfer applications such as electronic packaging and nuclear reactors. This parameter also appears in fin-tube heat exchangers; however, it is often neglected in the performance calculations of heat exchangers. This thesis project explores …
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Experimental hydrodynamic study of the slurry distribution in a vertical slurry heat exchanger
A slurry heat exchanger is simulated as part of the Solvent Refined Coal-I plant to preheat the coal and solvent slurry before hydrogen injection. The shell and tube heat exchanger is oriented vertically with upward slurry flow on the tube side to minimize the localized solid sedimentation in …
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Modelling, design and analysis of innovative thermal energy storage systems using PCM for industrial processes, heat and power generation
… development of numerical models of the latent heat thermal energy storage (LHTES) devices. Different models are developed by means of a 2D and 3D numerical simulation codes specifically implemented in the COMSOL Multiphysics environment. Design of LHTES requires knowledge of the heat transfer …
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An experimental analysis of heat transfer in coiled tubes
The axial temperature distribution and average heat transfer coefficients were measured for a coiled tube heat exchanger. Water was heated inside the tube under turbulent flow conditions by low pressure steam condensing on the outside. Inside and outside film coefficients were determined at …
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Thermal Boundary Condition Effects On Local Supercritical CO2 Heat Transfer Trends In Tubes
… carbon dioxide (sCO2) is a promising heat transfer fluid for the refrigeration and power generation industries due to its unique thermal properties and low environmental impact. To understand it as an alternative to traditional working fluids, the thermophysical and heat transfer …
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Effect of latent load on heat exchanger design
… increasingly more significant [14], [16]. Heat exchangers are a fundamental component of thermal systems. These systems often operate in high humidity environments where latent loads can significantly reduce performance due to condensate accumulation on fin surfaces. The current …
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High Capacity Heat Exchangers for Recirculating 18F Radionuclide Production Targets
… 18O enriched water by the 18O(p,n)18F reaction. Heat deposited in the target fluid by the proton beam is proportional to the 18F produced, thus production is often limited by the targets ability to reject heat. For power levels above 3 kW, boiling batch targets with local cooling can become …
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Numerical analysis of a fin-tube plate heat exchanger with winglets
In this presented work, numerical analysis of heat transfer and flow characteristic using longitudinal vortex generators (LVGS) in fin and flat tube heat exchanger has been presented. Conjugate heat transfer 3D numerical model has been developed and successfully carried out. Rectangular winglets …
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Studies of the shellside performance of shell-and-tube heat exchangers
… shellside pressure drop in a baffled shell-and-tube heat exchanger is very difficult because of the complicated shellside geometry. Ideally, all the shellside fluid should be alternately deflected across the tube bundle as it traverses from inlet to outlet. In practice, up to 60% of the …
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Heat extraction for the CSPonD thermal storage unit
Three coiled tube heat exchanger prototypes were designed to extract heat from containers holding 0.5 kg, 2.3 kg, and 10.5 kg of Sodium Nitrate-Potassium Nitrate salt. All of the prototypes were left with an open surface free to undergo radiation losses and surface convection. The first objective …
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Flow and pressure drop on the shellside of cylindrical heat exchangers
… on the shellside of a cylindrical shell-and-tube heat exchanger. The apparatus used was constructed from glass enabling direct observation of the flow using a dye release technique and had ten traversable pressure instrumented tubes permitting detailed pressure distributions to be obtained. …
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