Topic
Subcooling
About: Subcooling is a research topic. Over the lifetime, 6150 publications have been published within this topic receiving 99125 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the velocity field was measured in turbulent subcooled boiling flow of Refrigerant-113 through a vertical annular channel whose inner wall was heated using a two-component laser Doppler velocimeter.
Abstract: The velocity field was measured in turbulent subcooled boiling flow of Refrigerant-113 through a vertical annular channel whose inner wall was heated. A two-component laser Doppler velocimeter was used. Measurements are reported for two fluid mass velocities and four wall heat fluxes in the boiling layer adjacent to the inner wall as well as in the outer all-liquid layer. The turbulence was found to be inhomogeneous and anisotropic and the turbulent kinetic energy significantly higher than in single-phase liquid flow at the same mass velocity. The axial Reynolds shear stress in the liquid phase was observed to increase sharply near the inner wall. The near-wall velocity field appeared to be quite different from that in single-phase flow. It remains a challenge to separate the contributions of wall turbulence and bubble-induced pseudo-turbulence from the measurements which possibly represent a complicated interaction between the two.
45 citations
TL;DR: In this paper, experimental analysis was performed for ammonia-water falling film absorption process in a plate heat exchanger with enhanced surfaces such as offset strip fin, and the authors examined the effects of liquid and vapor flow characteristics, inlet subcooling of the liquid flow and inlet concentration difference on heat and mass transfer performance.
Abstract: In this article, experimental analysis was performed for ammonia–water falling film absorption process in a plate heat exchanger with enhanced surfaces such as offset strip fin. This article examined the effects of liquid and vapor flow characteristics, inlet subcooling of the liquid flow and inlet concentration difference on heat and mass transfer performance. The inlet liquid concentration was selected as 5%, 10% and 15% of ammonia by mass while the inlet vapor concentration was varied from 64.7% to 79.7%. It was found that before absorption started, there was a rectification process at the top of the test section by the inlet subcooling effect. Water desorption phenomenon was found near the bottom of the test section. It was found that the lower inlet liquid temperature and the higher inlet vapor temperature, the higher Nusselt and Sherwood numbers are obtained. Nusselt and Sherwood number correlations were developed as functions of falling film Reynolds Re 1 , vapor Reynolds number Re v , inlet subcooling and inlet concentration difference with ±15% and ±20% error bands, respectively.
45 citations
TL;DR: In this article, the authors developed a wet steam model to investigate the flow structure inside a supersonic separator with the co-existence of non-equilibrium condensation and shock waves.
45 citations
TL;DR: In this paper, a novel high-efficient absorption refrigeration cycle regarded as an improved single-effect/double-lift configuration is proposed, which uses an evaporator/absorber (E/A) to promote the coefficient of performance and reduce the irreversible loss.
45 citations
TL;DR: In this article, an effective specific heat capacity model for turbulent heat transfer to phase change material (PCM) suspensions in a circular tube with constant wall heat flux is presented, which is implemented in the form of a computer code and its numerical predictions are found to agree with previously published experimental data.
45 citations