Cooling Tower Efficiency Calculations Cooling Tower Efficiency Calculation is described in this article. Cooling Tower plays a major role in Chemical Process Industry. They reject process heat from the cooling water to atmosphere and keep the water cool. The performance of the cooling tower depends on various parameters like Range & Approach. Thermal Design Worksheet. An interactive, graphical worksheet designed to speed cooling tower thermal calculations. Set your own values for wet bulb, range and altitude, and plot your own demand curve on virtually any printer. Performance Evaluator. Ulead video studio 11 serial key free download. Evaluates induced draft counterflow and crossflow cooling tower performance with field acquired.

A cooling tower use to reduce the temperature of circulated water, and • they can achieve water temperatures below the - t db - of the cooling air • they are in general smaller and cheaper for the same cooling loads than other cooling systems Cooling towers are rated in terms of approach and range, where • the approach is the difference in temperature between the cooled water temperature and the entering air - t wb - temperature • the range is the temperature difference between the water inlet and water exit Note! - for a cooling tower based on evaporative cooling the maximum cooling tower efficiency is limited by the of the cooling air. Cooling Tower Efficiency Cooling tower efficiency can be expressed as μ = (t i - t o) 100 / (t i - t wb) (1) where μ = cooling tower efficiency (%) - the common range is between 70 - 75% t i = inlet temperature of water to the tower ( oC, oF) t o = outlet temperature of water from the tower ( oC, oF) t wb = wet bulb temperature of air ( oC, oF) The temperature difference between inlet and outlet water (t i - t o) is normally in the range 10 - 15 oF.

The water consumption - or the amount of make up water - of a cooling tower is about 0.2-0.3 liter per minute. Compared with the use and waste of city water the water consumption can be reduced with about 90 - 95%. There are two main types of cooling towers • forced draught (using fans) • natural draught Both types are based on evaporative cooling.

• Natural draught cooling towers are more dependent on temperature gradients between air and water and the wind forces than forced draught cooling towers • The efficiency of natural draught towers are more variable over time and in general lower Note! - be aware that a medium temperature system - like cooling a tower - are a known source of pathogenic bacteria causing the. Good cleaning and maintenance of the systems are important to minimize the risk.

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