Ventilation module for an aero-refrigeration tower including a free wheel for drawing in outside air and for outputting air

Abstract

A ventilation unit for an air-cooling tower and comprising a freewheel for drawing outside air and for discharging air in the upper portion of the ventilation unit. The freewheel has a rear face and a front face, the freewheel draws the outside air according to the direction of the axis of rotation of the freewheel by the front face and discharges the air radially to the axis of rotation of the freewheel, the ventilation unit being passed through by a drawing passage of outside air and by a discharge passage of air, the discharge passage of air directing the flow of air to the front of the plane formed by the front face. The subject matter also relates to an air-cooling tower and a method for drawing and for discharging air in such a ventilation unit.

1 . Air-cooling tower comprising a mixed unit comprising an air humidification device and a passage as a by-pass and a dry unit, with the dry unit being superimposed on the mixed unit, with the tower further comprising a ventilation unit, with the mixed unit being superimposed on the ventilation unit, and wherein said ventilation unit comprise a freewheel for drawing outside air and for discharging air in the upper portion of the ventilation unit, the freewheel has two faces, a rear face and a front face, said freewheel draws the outside air according to the direction of the axis of rotation of said freewheel by the front face and discharges the air radially to the axis of rotation of said freewheel, the ventilation unit being passed through by at least one drawing passage of outside air and by at least one air discharge passage, said at least one air discharge passage being configured to direct the flow of air to the front of the plane formed by the front face, opposite the rear face. 
     
     
         2 . Air-cooling tower according to  claim 1  wherein at least one discharge passage is configured to orient the air in a direction perpendicular to the direction of the axis of rotation of said freewheel. 
     
     
         3 . Air-cooling tower according to  claim 1 , wherein the ventilation unit integrates the freewheel inside thereof. 
     
     
         4 . Air-cooling tower according to  claim 2 , wherein the ventilation unit is passed through by at least one drawing passage of outside air and by at least two symmetrical air discharge passages on either side of the drawing passage, said drawing and discharging passages extend substantially parallel to one another by being partitioned with respect to one another. 
     
     
         5 . Air-cooling tower according to  claim 4 , wherein said at least one drawing passage communicates with the freewheel, on the front face of said freewheel. 
     
     
         6 . Air-cooling tower  claim 4 , wherein the circulation of air is carried out with a speed component according to the axis of rotation of the freewheel in the opposite direction in the discharge passage in relation to the circulation of air in the air drawing passage. 
     
     
         7 . Air-cooling tower according to  claim 6 , wherein at least three discharge passages are provided, with two discharge passages inserting an air drawing passage between them. 
     
     
         8 . Air-cooling tower according to  claim 1 , wherein the dimension of the drawing passage, according to the direction of the axis of rotation of the freewheel, is between 30% and 85%, and more preferably between 60% and 70%, more particularly 66%, of the total dimension of the unit according to this direction. 
     
     
         9 . Air-cooling tower according to  claim 8 , wherein said at least one drawing passage has at least one lateral grid arranged under the slope of said at least one discharge passage. 
     
     
         10 . Air-cooling tower according to  claim 1 , wherein said at least one drawing passage has a bottom that extends substantially horizontally when the ventilation unit is in vertical position and said at least one drawing passage has two substantially vertical lateral partitions, a roof enclosing the drawing passage on the upper face of the drawing passage. 
     
     
         11 . Air-cooling tower according to  claim 10 , wherein the roof is sloped by presenting two inclined faces towards a respective lateral partition. 
     
     
         12 . Air-cooling tower according to  claim 1 , which is a rectangle parallelepiped having a length and a width, said at least one drawing and discharging passage extending in the width of the ventilation unit, said freewheel being positioned towards a longitudinal edge of the unit. 
     
     
         13 . Air-cooling tower according to  claim 12 , wherein said freewheel is housed in a compartment, said at least one drawing passage opening into the compartment and said at least one discharge passage exiting the compartment. 
     
     
         14 . Air-cooling tower according to  claim 13 , wherein the compartment has a pierced ceiling and is provided with at least one element for closing off for at least one passage as a by-pass of said at least one discharge passage. 
     
     
         15 . Air-cooling tower according to  claim 14 , wherein said at least one element for closing off the compartment is mobile in position in order to open or close the passage as a by-pass. 
     
     
         16 . Air-cooling tower according to  claim 15 , wherein said at least one element for closing off is adjustable in intermediate positions to a complete opening or closing. 
     
     
         17 . Air-cooling tower according to  claim 1 , which has an inclined water collector basin arranged under the freewheel, with the basin being inclined in order to drain the water outside of the ventilation unit. 
     
     
         18 . Air-cooling tower according to  claim 1 , wherein the mixed unit comprises a first enclosure that has at least one device for humidifying the air passing though it and a second enclosure as a by-pass connecting the ventilation unit to the dry unit with a circulation of air without humidification, with the second enclosure being located over a compartment housing the freewheel with a ceiling pierced with at least one element for closing off. 
     
     
         19 . Method for drawing and discharging air in a ventilation unit of an air-cooling tower according to  claim 17 , wherein the drawing and the discharging of air are carried out on the same side of the freewheel by being separated from one another. 
     
     
         20 . Method according to  claim 19 , wherein the air discharged by the ventilation unit passes through the mixed unit by passing through the air humidification device and/or the passage as a by-pass without humidification treatment in order to penetrate into the dry unit.