3.2.8 There shall be no bypass of air around the drift eliminators.3.2.7 The design air velocity through the fill and the drift eliminators shall not exceed 3 m/s.3.2.6 Cooling towers shall be equipped with high-performance drift eliminators.3.2.5 Consider factors such as the height of adjacent structures, direction and velocity of prevailing winds, and the presence of enclosures and screenings around adjacent cooling towers while siting cooling towers.3.2.4 Do not locate cooling towers near kitchen exhaust fans, truck bays, other sources of organic materials, or outdoor areas that are densely populated.3.2.3 A separation distance exceeding 10 meters shall be used if there is a greater risk of contamination.3.2.2 The minimum separation distance shall be 10 metres between the cooling tower and any air intake or other critical receptor.3.2.1 This section applies to new facilities and to major upgrades to existing facilities.

3.1.5 Cooling towers may be subject to local regulations.3.1.4 The risks should be minimized with proper design, start-up and commissioning, maintenance, and testing, as indicated in the following sections.3.1.3 Plumes arising from cooling towers also pose a significant risk for transmission of Legionella bacteria.3.1.2 Cooling towers present a significant risk for exposure to Legionella as they allow favorable conditions for the growth of Legionella bacteria.3.1.1 For the purposes of this standard, the term “cooling tower” shall also include “evaporative condenser.”.Said another way, the cooling tower test translates the performance of the tower at test conditions to an equivalent performance at design conditions.Document navigation for 'Mechanical design 15161-2013: Control of Legionella in mechanical systems' Thus, the ratio of predicted water flow rate to the adjusted circulating water flow rate is a constant which means tower capability is a constant despite testing at off design conditions. Because the manufacturer’s performance curves are equivalent representations of the tower performance at various operating and environmental conditions, the predicted water flow rate is the flow rate of a cooling tower with 100% capability. Typically, the primary goal of a cooling tower thermal performance test is to determine the cooling capacity of a cooling tower when operated at its design conditions of water flow, range, fan motor power (mechanical draft), dry bulb temperature (natural draft), and barometric pressure.įor a mechanical draft tower, cooling capability is defined as the ratio of circulating water flow rate (corrected to design fan motor power consumption) to the predicted water flow rate as determined by the cooling tower manufacturer’s performance curves.

Cooling tower testing procedure