Numerical simulation of water spray transport along a plate of a heat exchanger

Grich, Nihel; Foudhil, Walid; Harmand, Souad; Jabrallah, Sadok Ben

doi:10.1007/s10973-020-09356-w

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…Dry bulb temperature, ambient absolute humidity, air flow velocity, temperature and velocity of droplets are the main operational parameters which influence on the spray cooling performance. A number of papers with experimental [3][4][5][6] or numerical [7][8][9][10] analysis, focused on the investigation of operational parameters impress on the spray cooling performance.…”

Section: Introductionmentioning

confidence: 99%

Thermal analysis on the impact of spray charactristics on evaporative cooling process

Amoli

Ajarostaghi

SEDIGHI

et al. 2022

Journal of Thermal Engineering

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In hot and dry climates, evaporative cooling of the air by water spray can be applied in several requirements, such as evaporative condensers which the airflow is precooled by the water spray before it reaches the condenser. The interaction between water droplets and the air is a complicated two-phase flow that is affected by the several parameters. Here, an Eulerian-Lagrangian 3D model was developed to investigate the influence of important parameters on spray cooling performance in a rectangular duct. The evaluated parameters include the number of nozzles, inlet air flow rate, and spray water flow rate. The results represented that growth in the number of nozzles causes a reduction in the spray cooling efficiency. Thi s is due to decrease of droplets retention time within the duct by increasing the number of nozzles at a constant total spray flow rate in the cases. The maximum and minimum spray cooling efficiency belong to the cases with one nozzle at water flow rate of 20 l/h and four nozzle at water flow rate of 5 l/h, respectively. The difference between spray cooling efficiency at 3 and 4 number of nozzles is less than 1.8%. Moreover, increasing the air flow rate from 0.5 l/h to 2 l/h (by 300%) makes a decrease in the spray cooling efficiency up to 58.6%.

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Section: Introductionmentioning

confidence: 99%

Thermal analysis on the impact of spray charactristics on evaporative cooling process

Amoli

Ajarostaghi

SEDIGHI

et al. 2022

Journal of Thermal Engineering

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“…Authors in [4] presented a model based on the Finite Differences Method to evaluate the external surface temperature of a roof using the accumulated internal surface heat flux and the evaporation rate. Authors in [5] carried out a two-dimensional numerical model of evaporation on a plate of the heat exchanger. They showed that ambient temperature, relative humidity, and wind speed have a significant impact on the evaporation and on the reduction of plate temperature.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Model for Heat and Moisture Transfer in Porous Media of Building Envelopes

Scussiato

Ito

Ramis

et al. 2022

Eng. Technol. Appl. Sci. Res.

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This study presents a one-dimensional quantitative analysis of unsaturated flow in natural stones using a numerical model (Finite Difference Method) and a mass balance for the heat flow. For that, we considered heat and moisture transfer between the external environment and a porous media (sandstone and limestone) with homogeneous characteristics. For unsaturated water flow, Richards’ equation and the formulation proposed by Gardner for volumetric water content and hydraulic conductivity were considered. The results of the numerical analysis showed that the evaporation of porewater throughout summer days (January 3rd and 4th) considerably reduced the temperature of the roof by about 8°C. The accumulated conductive heat flow and the volumetric water content were also reduced due to the evaporation process. This fact indicates that evaporation can be useful in providing thermal comfort and, consequently, in improving the energy efficiency of buildings with natural stones as envelopes.

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Heat transfer and power consumption of an optimized low-pressure compact drizzling cooling module integrated PEMFC stack radiator

Souby,

Prabakaran,

Liu

et al. 2024

International Communications in Heat and Mass Transfer

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Numerical simulation of water spray transport along a plate of a heat exchanger

Cited by 5 publications

References 31 publications

Thermal analysis on the impact of spray charactristics on evaporative cooling process

Thermal analysis on the impact of spray charactristics on evaporative cooling process

A Numerical Model for Heat and Moisture Transfer in Porous Media of Building Envelopes

Heat transfer and power consumption of an optimized low-pressure compact drizzling cooling module integrated PEMFC stack radiator

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