Sıcak su deniz deşarjlarının yakın alan dağılımının modellenmesi

Abstract

 Heated discharges  Near field dilution  Numerical modeling in coastal waters  CORMIX  Visual Plumes Figure A. Modeling of near field dilution Purpose: The main cause of heated water discharges is the use of seawater as a coolant by power plants and industrial manufacturers. Uncontrolled discharges into the ambient sea water having excess heat, have an adverse effect on the ecosystems. In this study, the near field dilution of heated sea water discharges was modeled and the behaviors of pollutant clouds were analyzed using CORMIX (CORMIX2) and Visual Plumes. Following effects of different parameters (total effluent discharge, diffuser length, port details, current) on the near field dilution of heated discharges were investigated with different scenarios waters by numerical models CORMIX2 and Visual Plumes. Sensitivity analysis of the discharge parameters were made comparatively. Theory and Methods: Samsun coastal area is selected as a real coastal area to obtain realistic results. The salinity and temperature measurements are used to calculate the density in the ambient water. Wind and wave climates and current pattern are used as input in the models. The predictions of CORMIX and Visual Plumes are compared. Results: Near-field dilution modeling is affected by wastewater discharge, current velocity, diffuser length, port diameter and number of ports significantly Conclusion: The effects of the wastewater discharge, current velocity, and port details on the near-field dilution are examined. It is checked, for the conditions used in this study, that near-field dilution is greater than 40. Visual Plumes and CORMIX predictions are acceptable and similar for positive buoyancy conditions. Both of them are reliable tools for determination of near field dilution of heated discharges.

Propuesta de mejoramiento de capacidad hidráulica del emisor submarino de la PTAR La Chira mediante el uso del coeficiente de contracción de las válvulas de retención tipo Duckbill en el tramo difusor

“…Además, se evidencio que la velocidad de corrientes marinas no tuvo mucha influencia con el fluido, más bien la velocidad de salida es lo que aumento de manera exponencial el grado de dilución en el cuerpo de agua. Sin olvidar, ambos softwares que se utilizaron para realizar los modelos han tenido una varianza con respecto a sus resultados con caudales menores a 15 m3/s, esto cambia rotundamente si los caudales eran mayores a la cantidad que ya se mencionó (İnan & Yılmaz, 2018).…”

“…Posteriormente a la descarga del efluente en el mar, este disminuye prontamente en concentración, dilución inicial y dispersión, de modo que permiten diluciones y el transporte de este hacia la costa, debido a ello la estructura del flujo y la distancia a la costa en el entorno receptor deben ser adecuadas (İnan & Yılmaz, 2018).…”

“…Además, la función más importante que se espera de un sistema de descarga marina es reducir las concentraciones de la sustancia suministrada al medio ambiente por debajo de los valores límites máximos permisibles por la dilución, según el uso previsto de la sección costera (İnan & Yılmaz, 2018).…”