Many municipalities monitor sewage output based on water intake. If you are discharging chemically treated water into a storm drain via an overflow, you may face environmental penalties. Best Practices for Prevention and Maintenance
If you find your tower is currently overflowing, follow these steps:
To understand why a cooling tower overflows, one must first understand its standard operation. The tower relies on a basin, or sump, to hold a specific volume of water. As water evaporates during the cooling process, the level drops, triggering a makeup water valve to open and replenish the supply. Overflow occurs when the input of water exceeds the system's capacity to contain or evaporate it. The failure usually originates from one of three distinct sources: mechanical failure, control logic errors, or hydraulic imbalances. cooling tower overflow
In the complex ecosystem of industrial HVAC and process cooling, the cooling tower acts as the primary heat rejection device. While often viewed as a passive component, it requires a precise balance of water chemistry, airflow, and levels to operate efficiently. Among the most common—and most costly—malfunctions in this system is cooling tower overflow. At first glance, a leaking tank might seem like a mere nuisance, but uncontrolled overflow is a symptom of systemic inefficiencies. It leads to wasted water, skyrocketing chemical costs, potential structural damage, and environmental compliance issues. Understanding the etiology of overflow is essential for facility managers aiming to optimize both operations and budgets.
Upgrade from mechanical floats to multi-point electronic sensors. These are more reliable and can be integrated into a Building Management System (BMS). Many municipalities monitor sewage output based on water
If using electronic controls, ensure the solenoid valve isn't stuck in the "open" position due to a burnt-out coil or debris.
In modern facilities governed by Building Automation Systems (BAS), the problem is often digital rather than purely mechanical. These systems rely on level sensors—typically ultrasonic, capacitance, or conductive probes—to relay data to the control panel. If a sensor becomes fouled with biological growth (biofilm) or scale, it may report a "low level" reading when the basin is actually full. Consequently, the automation system commands the makeup valve to open, causing an overflow event. This highlights the critical need for regular sensor calibration and cleaning; a dirty sensor is not just inaccurate, it is financially wasteful. The tower relies on a basin, or sump,
A small, continuous overflow can waste thousands of gallons of water per month. In regions with high utility rates or drought restrictions, this is a significant financial drain.