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Showing 1 to 20 of 165 for “"Evaporator"”.
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Heat transfer in the climbing film evaporator
Typewritten
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Oscillating Heat Pipe Performance with Evaporator Section Modifications
… consist of two main sections: the condenser and evaporator that are interconnected by looping channels. The channels are filled with a two-phase mixture of acetone, which acts as the heat transfer medium for the system. In this study, geometric features in the evaporator section are compared to …
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Control and optimization of a multiple-effect evaporator
… is also a large potential to lose sucrose at the evaporators due to the high temperatures and long residence times employed there. The smooth control of the evaporators is thus vital to consistent factory operation, and the evaporators are commonly a sugar factory bottleneck. This study developed …
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An Evaluation and Redesign of a Thermal Compression Evaporator
Evaporators separate liquids from solutions. For maximum efficiency, designers reduce the temperature difference between the heating and heated media using multiple-stage evaporators. This efficiency requires increased size and bulk. A vendor claimed its thermal compression evaporator achieved high …
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Effect of conical distributors on evaporator and system performance
… the distribution of refrigerant and air in the evaporator using a conical distributor on system COP and capacity. Several conditions at the distributor inlet are varied including quality, mass flux, and orientation in gravity and the resulting superheat profiles of the evaporator circuit outlets …
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Boiling film coefficients for sulfur dioxide in a vertical evaporator
… coefficient was on the steam side of the test evaporator. This was due to the comparatively large values obtained for SO₂ bolling film coefficients. Within the limits of this investigation, the overall heat transfer coefficient may be taken as approximately equal to the steam film coefficient. …
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INVESTIGATION OF PERFORMANCE DEGRADATION OF EVAPORATOR FOR LOW TEMPERATURE REFRIGERATION APPLICATIONS
An evaporator test stand has been designed, sized, constructed, calibrated and operated to investigate the evaporator performance degradation for low temperature refrigeration applications. Measurements have been taken of air- and refrigerant-side temperatures, refrigerant-side pressures, air- and …
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Micro-Evaporator Design and Investigation of Phase Change in Tailored Microchannels
… experimental study of flow evaporation in micro-evaporators with tailored microchannel walls, demonstrating the ability to provide a stable flow of evaporated fluid for energy conversion and chip cooling applications. The design and modeling approach, microfabrication process and the full testing …
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The Application of On-line Estimation to a Double Effect Evaporator
… heat transfer coefficients of a double effect evaporator. Two dynamic models are derived - a comprehensive eighteen order system and a fourth order reduced model. Two major software packages are developed - ASP, for interactive digital simulation and BASELINE for interactive data logging. Both …
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A method to determine the performance of a natural-circulation evaporator
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1953.
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Impact of alternative refrigerants on evaporator design and analysis of compact heat exchangers
… such as, plate fin and tube, shell and tube evaporator and compact heat exchangers. A computer code has been developed in Quick-Basic language to conduct this investigation.
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Enhancement of nucleate boiling heat transfer by surface modification in a cold plate evaporator
… with R134a in a microchannel cold plate evaporator. Internal copper and brass surfaces were modified with the deposition of copper oxide nanostructures with the intention of improving nucleate boiling heat transfer. The spike-like nanostructures increase the real internal surface area and …
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Characteristics of heat transfer fouling of thin stillage using model thin stillage and evaporator concentrates
… wet grains and liquid fraction as thin stillage. Evaporator fouling occurs during thin stillage concentration to syrup and decreases evaporator performance. Evaporators need to be shutdown to clean the deposits from the evaporator surfaces. Scheduled and unscheduled evaporator shutdowns decrease …
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Design and application of a bench scale evaporator for the treatment of coal power plant waste water
… assembled, RO-retentate was introduced to the evaporator at an evaporation rate of 4 L/h (22.3 L/m²/h), and the variation of the concentrations of scale forming elements determined. The evaporation observed translates to 34.5% water recovery. Speciation using PHREEQ-C modelling software showed …
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Modeling and Numerical Investigation of Hot Gas Defrost on a Finned Tube Evaporator Using Computational Fluid Dynamics
… to remove the frost layer accumulated on the evaporators after a period of running time. It is one way to improve the energy efficiency of refrigeration systems. There are many studies about the defrosting process but none of them use computational fluid dynamics (CFD) simulation. The purpose …
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Effects of temperature conditions and heat treatment within a multiple effect evaporator on thin stillage fouling characteristics
… efficiency. In the fuel ethanol industry, evaporator fouling occurs when thin stillage is concentrated. Fouling affects the efficiency and environmental footprint of more than 200 biorefineries in the US. Thin stillage is the liquid fraction of unfermented materials from fermentation and is …
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