RPA Engineering has developed the Dual Cooling Tower Spillover Temperature Control System, a dual PLC-driven system for chilled water processes that allows two or more cooling towers to be individually controlled to optimise cost and energy savings.
Traditionally, a single-temperature controller operates two or more cooling towers’ fans in tandem. In systems with multiple cooling towers, sensitivity to changes in temperature and fluctuations in humidity and ambient conditions can result in wasted energy, as the secondary cooling towers may run unnecessarily in response to subtle atmospheric and process changes.
RPA’s system allows the controller to establish different set points for each cooling tower. In this way, the first tower operates its fan only as needed to regulate the temperature, while the additional tower fans are engaged only as needed to regulate the broad range of temperatures required by the process plant equipment. This variable control option helps reduce energy costs.