Topic
Subcooling
About: Subcooling is a research topic. Over the lifetime, 6150 publications have been published within this topic receiving 99125 citations.
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TL;DR: In this paper, the effect of pipe diameter, heat flux and mass flux on boiling pressure drop and local heat transfer coefficient is investigated for low pressure flow boiling with water as the working medium.
36 citations
TL;DR: In this article, the potential of using hydrogel particles for simultaneously inhibiting the formation of gas hydrates and preventing their agglomeration after they form was investigated.
Abstract: This study investigates the potential to use hydrogel particles for simultaneously inhibiting the formation of gas hydrates and preventing their agglomeration after they form. The particles were synthesized specifically for this application and swell to a controlled degree in water and remain discrete. A stirred autoclave was used to determine the hydrate onset time, subcooling temperature, initial growth rate, and torque changes during hydrate formation with the water absorbed in the hydrogel particles. The system also included a liquid decane phase which simulates a condensate. In comparison to water (with no particles) + decane mixture, the hydrate onset time was delayed and the subcooling temperature increases. In addition, both the initial growth rate and hydrate fraction were lower for polymer hydrogels. Stable torque is observed for polymer hydrogels while there are sharp increases in torque before the stirrer stops for water + decane mixture, suggesting that the hydrogel particles (and hence hydra...
36 citations
Patent•
24 Jan 1990TL;DR: In this article, a modular magnetic refrigeration system with a wheel rotating through a housing module has been described, where two elements are separated by a wave spring, the wave spring biasing the elements against the housing module so that the elements are in slidable contact with the module upon rotation.
Abstract: A magnetic refrigeration apparatus (10) is modular in design, so that housing modules (14) are alternately stacked with superconducting magnet pairs (24). Each module (14) has a wheel (16) that is rotated through the module (14), the wheel (16) having cutout regions (18) into which elements (20) of magnetic material are inserted. Each cutout region has two elements (20) separated by a wave spring, the wave spring biasing the elements (20) against the housing module (14) so that the elements (14) are in slidable contact with the module (14) upon rotation. In operation, the wheel (16) carries the elements (20) cyclically between high and low magnetic field zones. In low field regions the elements (20) are cooled by the magnetocaloric effect and heat exchangers absorb heat from either a stagnant subcooled superfluid helium bath or a forced-flow subcooled superfluid helium stream. In high field regions the elements (20) are heated by the magnetocaloric effect and a force-flow stream of liquid helium passes through the high temperature heat exchangers absorbing heat from the magnetic refrigeration apparatus (10).
36 citations
TL;DR: In this article, the condensation heat transfer coefficients with non-condensable gases are measured to obtain the condensens heat transfer correlation to be applied to the design of passive containment cooling systems for light water nuclear power plants.
Abstract: The condensation heat transfer coefficients with noncondensable gases are measured to obtain the condensation heat transfer correlation to be applied to the design of passive containment cooling systems for light water nuclear power plants. The derived condensation heat transfer correlation is applicable in a wider range of subcooling than existing correlations. The dependence of the derived correlation on the length of condenser tubes is weak. The derived correlation based on experimental heat transfer results can be applied to the design of the passive containment cooling systems at actual nuclear power plants.
36 citations
TL;DR: A set of condensation experiments in the steam-air and pure steam conditions has been conducted to evaluate the heat removal capacity of a vertically pin-fin tube under free convection as mentioned in this paper.
36 citations