{"id":3150,"date":"2021-07-01T14:33:16","date_gmt":"2021-07-01T12:33:16","guid":{"rendered":"https:\/\/www.w-tech.it\/torri-evaporative-cosa-sono-e-come-funzionano\/"},"modified":"2022-02-25T15:43:06","modified_gmt":"2022-02-25T14:43:06","slug":"torri-evaporative-cosa-sono-e-come-funzionano","status":"publish","type":"post","link":"https:\/\/www.w-tech.it\/en\/torri-evaporative-cosa-sono-e-come-funzionano\/","title":{"rendered":"Evaporative towers: what they are and how they work"},"content":{"rendered":"[vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none”][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” tablet_text_alignment=”default” phone_text_alignment=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”][vc_column_text][vc_row][vc_column width=”1\/1″][vc_column_text]\n

Evaporative towers: what are they?<\/strong><\/h2>\n

Cooling<\/strong> towers, or evaporative<\/strong> towers, have the function of dissipating heat<\/strong> from a liquid through a gas. Most of the time the gas phase consists of air<\/strong> or water vapour and the liquid phase of water<\/strong>. In short, a heat exchanger between water and air, which through the subtraction of heat from the liquid leads to the evaporation<\/strong> of a minimum<\/strong> quantity of water<\/strong>, compared to the total in circulation.<\/p>\n

Within industrial processes<\/strong>, in HVAC<\/strong> and in energy production,<\/strong> excess heat<\/strong> is often produced which must be disposed of<\/strong> in some way. Among the various alternatives available to achieve this goal, evaporative towers constitute one of the most efficient<\/strong> and economical<\/strong> solutions on the market.<\/p>\n

Evaporative towers: what are the advantages?<\/strong><\/h2>\n

The structural simplicity<\/strong> of the cooling towers, combined with their efficiency<\/strong> in terms of dissipated cost \/ kW<\/strong> ratio, make these systems widely used in both civil and industrial sectors.<\/p>\n

Using evaporative cooling towers is more effective<\/strong> than using dry air<\/strong> cooling<\/strong> if a final fluid temperature below ambient is desired. In fact, as Assoclima confirms, with 1 Kg of water<\/strong> the subtracted heat<\/strong> is 2,200 kJ per \u00b0C<\/strong>, while with 1 Kg of air<\/strong> the removed heat<\/strong> is about 1 kJ per \u00b0C.<\/strong> Among other things, thanks to evaporative cooling, it is possible to reduce the outlet water temperature to approximately the wet bulb temperature<\/strong>, which is lower than the dry bulb temperature<\/strong> . The wet bulb temperature, in fact, is the lowest temperature that can be obtained by evaporation of water in the air, at constant pressure.<\/p>\n

In terms of energy consumption<\/strong>, a tower can consume up to four times less<\/strong> than other cooling systems. If we consider the increasing attention to the issue of global warming, as well as energy consumption, it is clear that the use of an evaporative tower represents one of the most advantageous solutions.<\/p>\n

Cooling towers: how do they work?<\/strong><\/h2>\n

The principle of operation of a forced open circuit<\/strong> cooling tower<\/strong> is the most commonly used model. In evaporative towers, the process fluid<\/strong> (water) is cooled<\/strong> by a counter-current flow of cold air<\/strong>. The water (4) is sprayed from the nozzles positioned above the heat exchange pack (3), where it comes into contact with the flow of cold air sucked in by the grids (2). During the passage in the heat exchange pack, part of the water evaporates and the larger drops are separated from the air flow thanks to the drop eliminators above the distributor (5). The hot saturated air is released into the atmosphere from the top of the tower (6). The cooled water<\/strong> collects in the basin<\/strong> and is sucked up by the outlet equipped with a filter. The circuit is of the open type as the water to be cooled comes into contact with the atmosphere.<\/p>\n

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\"Cooling

Cooling tower operating system<\/p><\/div>\n

How to size a cooling tower? <\/strong><\/h3>\n

The parameters to keep in mind when choosing to use an evaporative tower are the following:<\/p>\n