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Showing 1 to 20 of 29 for “"Heat exchanger design"”.
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Synergistic diffuser/heat-exchanger design
… numerical evaluation of synergistic diffusing heat-exchanger design is presented. Motivation for this development is based on current diffuser and heat-exchange technologies in cogeneration plants, which require a large geometric footprint to generate steam using gas-turbine exhaust. A compact …
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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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Advanced technologies for heat exchanger design and manufacturing
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Heat exchanger design for thermoelectric electricity generation from low temperature flue gas streams
An air-to-oil heat exchanger was modeled and optimized for use in a system utilizing a thermoelectric generator to convert low grade waste heat in flue gas streams to electricity. The NTU-effectiveness method, exergy, and thermoelectric relations were used to guide the modeling process. The …
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Shallow geothermal energy: effect of in-situ conditions on borehole heat exchanger design and performance
… are critical for the performance of Borehole Heat Exchangers (BHEs). However, in practice they are often not adequately considered, overwhelming the potential of these systems. This thesis focuses on the accurate estimation of the in-situ characteristics and on their influence on the design …
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Evaluating a multi-jet Impingement air heat exchanger design for PEBB 6000 using Solidworks Flow Simulation
… constrained by its size, accessibility, and high heat flux. This paper proposes an air heat exchanger design that combines a parallel plate-fin heat sink with air jet impingement onto its fins. Previous studies showed that jet impingement methods can yield heat transfer rates that are three times …
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Heat Transfer Enhancement Using Tip and Junction Vortices
This research is important in compact heat exchanger design. Enhancing heat transfer can lead to smaller, more efficient heat exchangers in a broad range of applications. A simplified heat exchanger performance evaluation method is considered to explore the heat transfer benefit and pressure-drop …
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Development of a Minichannel Compact Primary Heat Exchanger for a Molten Salt Reactor
The first Molten Salt Reactor (MSR) was designed and tested at Oak Ridge National Laboratory (ORNL) in the 1960's, but recent technological advancements now allow for new components, such as heat exchangers, to be created for the next generation of MSR's and molten salt-cooled reactors. The primary …
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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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Long-term ground response For borehole heat exchangers in clay
The use of ground source heat pumps to transfer heat to and from the ground via borehole heat exchangers is among the most energy efficient techniques for space heating and cooling. Designs for seasonal heat exchange systems are becoming increasingly popular in urban environments to reduce energy …
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An experimental facility for microchannel research and evaporating R134a in microchannel tube
Microchannel research is important for heat exchanger design. Heat transfer coefficient and pressure drop are the two most important parameters to be measured in an experimental facility. A featured design of heat transfer behavior and pressure drop testing facility for both evaporating and …
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Design and optimization of a humidifier for an HDH system
… in the lab have just developed a novel design methodology for optimizing the performance of an HDH system based on thermal balancing, similar to the methodology used in heat exchanger design. An experimental pilot sized unit was built to test this methodology on a packed bed humidifier. …
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Heat transfer from in-line and perpendicular arrangements of cylinders in steady and pulsating crossflow
… the effect of organized flow pulsations on mean heat transfer from a single cylinder, in-line arrangements and perpendicular arrangements of cylinders. Pulsation frequencies of up to twice the natural vortex shedding frequency and zero to peak. amplitudes as high as 36 percent were used. …
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Modelling and computational analysis of heat-transfer in multi-geometry and multi-phase flow of Newtonian and non-Newtonian fluids in pipes and channels
… analyzes mathematical models for multi-geometry heat exchanger design and for multi-phase flow problems involving boiling and bubble formation. Newtonian fluids, Newtonian-Fluid-Based- Nanofluids, and non-Newtonian fluids are all considered in the thesis. The Newtonian-Fluid-Based Nanofluids …
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Liquid crystal thermography and image processing in heat and fluid flow experiments
… full-field studies of velocity, temperature and heat transfer coefficent-distributions, with their accompanying automatic analysis. Liquid crystals and true-colour image processing have opened some new approaches for heat transfer research and offer satisfactory accuracy and resolution. New and …
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Mission-Integrated Synthesis/Design Optimization of Aerospace Subsystems under Transient Conditions
… model known as the "Tip-to-tail" model meets the design specifications set forth by the INVENT program. The system consists of six intimately linked subsystems that include a propulsion subsystem (PS), air vehicle subsystem (AVS), robust electrical power subsystem (REPS), high power electric …
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Furnace offgas waste heat utilization
The project investigates a heat exchanger design concept for a furnace offgas pipe from an industrial furnace at Elkem. The goal is to develop a heat exchanging concept for harvesting exhaust heat using a numerical model. The proposed heat exchanger duct goes around a 3,2 m diameter pipe, and its …
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Velocity distributions in a plate heat exchanger channel
… the velocity distribution in a commercial plate heat exchanger is described. Detailed velocity profiles are presented and a preliminary investigation is reported on flow behaviour through a single cell in the channel matrix. The objective of the study was to extend previous investigations of …
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Measurements and Predictions of the Heat Transfer at the Tube-Fin Junction for Louvered Fin Heat Exchangers
Compact heat exchangers are usually characterized by a large heat transfer surface per unit of volume. These characteristics are useful when thermal energy between two or more fluids must be exchanged without mixing. Most compact heat exchangers are liquid-to-air heat exchangers, with approximately …
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Developing Innovative Heat Exchangers in a Small-Medium Enterprise: Modelling and Implementation of Pillow Plate Heat Exchangers
… solutions has driven innovative approaches in heat exchanger design, with Pillow Plate Heat Exchangers (PPHEs) emerging as a promising technology. After a concise but complete overview on the available scientific literature, this research explores the design, experimental validation, and …
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