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Crossflow

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Crossflow

Mechanical draft crossflow cooling tower used in an HVAC application

Crossflow is a design in which the air flow is directed perpendicular to the water flow (see diagram below). Air flow enters one or more vertical faces of the cooling tower to meet the fill material. Water flows (perpendicular to the air) through the fill by gravity. The air continues through the fill and thus past the water flow into an open plenum volume. Lastly, a fan forces the air out into the atmosphere. Adistribution or hot water basin consisting of a deep pan with holes or nozzles in its bottom is located near the top of a crossflow tower. Gravity distributes the water through the nozzles uniformly across the fill material.

Advantages of the crossflow design:

  • Gravity water distribution allows smaller pumps and maintenance while in use.
  • Non-pressurized spray simplifies variable flow.
  • Typically lower initial and long-term cost, mostly due to pump requirements.

Disadvantages of the crossflow design:

  • More prone to freezing than counterflow designs.
  • Variable flow is useless in some conditions.

 

 
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Article ID: 5
Category: Articles
Date added: 2013-03-17 00:55:26
Views: 114
Rating (Votes): Article rated 3.2/5.0 (24)

 
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