The axial fans of induced draft equipment are mounted in the top deck of the unit, minimizing the impact of fan noise on nearby neighbors and providing maximum protection from fan icing with units operating in sub-freezing conditions. The use of corrosion resistant materials ensures long life and minimizes maintenance requirements for the air handling components.
The fans are located on the air inlet face at the base of forced draft towers, facilitating easy access for routine maintenance and service. Additionally, the location of these components in the dry entering air stream extends component life by isolating them from the saturated discharge air.
Product capacities are called out in terms of nominal tons. A nominal cooling tower ton is defined as the capability to cool 3 GPM (0.19 lps) of water from a 95ºF (35.0ºC) entering water temperature to an 85ºF (29.4ºC) leaving water temperature at a 78ºF (25.6ºC) entering wet-bulb temperature. Nominal conditions are typical of conventional HVAC designs in most parts of the country, but will not apply to all projects. BAC offers selection software to evaluate the performance of a tower at many conditions.
Maximum Entering Water Temperature
As previously stated, typical HVAC conditions call for an entering water temperature of approximately 95ºF (35.0ºC). All BAC Cooling Towers are capable of withstanding temperatures of at least 120ºF (48.9ºC) with standard fill materials. For applications where the entering water temperature exceeds 120ºF (48.9ºC) alternate fill materials are available and may be required for your project.