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Heat Transfer Research
Factor de Impacto: 1.199 Factor de Impacto de 5 años: 1.155 SJR: 0.267 SNIP: 0.503 CiteScore™: 1.4

ISSN Imprimir: 1064-2285
ISSN En Línea: 2162-6561

Volumes:
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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2019027334
pages 1705-1719

NUMERICAL AND EXPERIMENTAL INVESTIGATION OF SPRAY EVAPORATION BASED ON DROPLET ANALYSIS

Yang Guo
Marine Engineering College, Dalian Maritime University, 1# Linghai Road, Dalian 116026, China
Bo Wang
Marine Engineering College, Dalian Maritime University, 1# Linghai Road, Dalian 116026, China
Wenbin Cui
Marine Engineering College, Dalian Maritime University, 1# Linghai Road, Dalian 116026, China
Fengmin Su
Marine Engineering College, Dalian Maritime University, 1# Linghai Road, Dalian 116026, China
Yulong Ji
Marine Engineering College, Dalian Maritime University, 1# Linghai Road, Dalian 116026, China
Hongbin Ma
Marine Engineering College, Dalian Maritime University, Dalian, Liaoning 116026 China; Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, Missouri, 65211, USA

SINOPSIS

Spray evaporation desalination technology has the potential to improve the performance of thermal desalination plants and make thermal desalination more competitive and appealing. For a better understanding of the seawater evaporation process, a mathematic model has been presented with consideration of the motion, heat transfer of the droplet, and performance of the evaporator based on droplet analysis. The model has been validated against experimental data, and simulation results showed good agreement with experiments with a discrepancy below 10%. The model can be used to evaluate water productivity and thermal utilization accurately, which are critical to the design of the evaporator. Research results revealed that smaller droplets and lower initial velocity lead to a high thermal utilization, while superheat degree has a marginal effect on thermal utilization. The merits of flash evaporation can make it operate at larger superheat with higher thermal utilization and water productivity while multi-stage flash distillation (MSF) needs more stages to eliminate non-equilibrium temperature differences.

PALABRAS CLAVE: Evaporation, Droplet, Spray

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