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RISEffective Thermal Diffusivity of Porous Media in the Wall Vicinity
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Transient heat transfer from an impulsively heated vertical constant heat flux plate embedded in a stationary saturated porous medium is studied experimentally and analytically to determine near-wall ...
Two-Phase Heat Transfer and Bubble Characteristics in a Microchannel Array
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Heat transfer coefficients and bubble motion characteristics are reported for two-phase water flow in an array of 13 equally spaced microchannels over an area of 1 cm2 . Each channel has Dh ...
On the Effectiveness of Baffles in Indirect Solar Storage Systems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Parameters that control heat transfer and mixing in energy extraction from indirect solar storage tanks that employ an immersed heat exchanger with a straight baffle beneath are identified and ...
Negatively Buoyant Plume Flow in a Baffled Heat Exchanger
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A numerical simulation of transient two-dimensional negatively buoyant flow into a straight baffle situated below an isothermal circular cylinder in an initially isothermal enclosure is presented ...
Use of a Shroud and Baffle to Improve Natural Convection to Immersed Heat Exchangers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Optimizing heat transfer during the charge and discharge of thermal stores is crucial for high performance of solar thermal systems for domestic and commercial applications. This study models a ...
Buoyant Convection in Superposed Metal Foam and Water Layers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Heat transfer measurements for natural convection in superposed metal foam and water layers are reported. Two systems heated at the lower boundary are considered: a water-filled cavity with a ...
Stability and Convection in Impulsively Heated Porous Layers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Experiments are reported on initial instability, turbulence, and overall heat transfer in a porous medium heated from below. The porous medium comprises either water or a water-glycerin solution ...
Natural Convection From a Tube Bundle in a Thin Inclined Enclosure
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Natural convection heat transfer coefficients for a rectangular array of eight tubes contained in a thin enclosure of aspect ratio 9.3:1 and inclined at 30 deg to the horizontal are measured ...
Thermal Characterization of Prototypical Integral Collector Storage Systems With Immersed Heat Exchangers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Natural convection is measured in an enclosure that represents an integral collector storage system (ICS) with an immersed tube-bundle heat exchanger. Heat transfer coefficients for bundles of ...
Natural Convection from a Horizontal Tube Heat Exchanger Immersed in a Tilted Enclosure
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Heat transfer rates of a single horizontal tube immersed in a water-filled enclosure tilted at 30 deg are measured. The results serve as a baseline case for a solar water heating system with ...