Evaluation of the performance of exhaust local ventilation systems in treatment surface tanks: Constraint ofthe facilities project

Authors

  • Enrique González Dpto. de Ingeniería Química. Universidad de Murcia
  • Agustín Miñana Dpto. de Ingeniería Química. Universidad de Murcia
  • Antonia Baeza Dpto. de Ingeniería Química. Universidad de Murcia
  • Francisca Morales Dpto. de Ingeniería Química. Universidad de Murcia
  • Francisco Marzal Dpto. de Ingeniería Térmica y de Fluidos. Universidad Politécnica de Cartagena

DOI:

https://doi.org/10.3989/revmetalm.1999.v35.i6.649

Keywords:

Open surface tanks ventilation, Local exhaust hoods, Tracer gas, Flow visualisation, Capture efficiency

Abstract


In the design of local exhaust ventilation systems for open surface tanks, the element of control that permits the total shutting in the source is clearly the best, being this procedure the starting point for industrial projector for the preliminary design installation. However, the frequent need of introducing and extracting the workpieces by their upper side through mobile crane or other load devices, the reinstatement components of the tank and the surveillance on the part operators, makes necessary that the access in such zone side be easy, being disabled the total encirclement. Consequently those components that prevent carry out the cited operations should be eliminated, appealing to the installation of local exhaust ventilation. Other inconvenients of these systems, derivated from the character omnidirectional of the aspiration, make necessary to operate with high exhaust flows to generate suitable speeds of control in the baths, therefore it is not advisable their installation for lengths higher than 1.20m. On the other hand the complexity of the mechanism of the involved air flows advises the experimental devices employment that permit the visualization of the different current of involved air, being furthermore necessary to use tracer gases to evaluate quantitatively the capture efficiency of the system. In this work are outlined, in function of the investigations carried out, the basis of the design of ventilation equipments to real scale that permit to study in-depth the influence of the variables that condition the capture efficiency.

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Published

1999-12-30

How to Cite

González, E., Miñana, A., Baeza, A., Morales, F., & Marzal, F. (1999). Evaluation of the performance of exhaust local ventilation systems in treatment surface tanks: Constraint ofthe facilities project. Revista De Metalurgia, 35(6), 402–408. https://doi.org/10.3989/revmetalm.1999.v35.i6.649

Issue

Section

Technical Notes