BMS communication is the nervous system of every modern building. A Building Management System (BMS) coordinates chillers, air handling units, variable frequency drives, lighting, and life-safety equipment by exchanging thousands of data points per second across a network. When that network performs well, the building is invisible to its occupants; when BMS communication degrades, the … Read more
Liquid level control is one of the most deceptively simple loops in HVAC and industrial plant operation, yet it is responsible for a disproportionate share of pump failures, cavitation damage, nuisance overflow, and unplanned shutdowns. A cooling tower basin that must not run dry, a condensate receiver that must not flood, a chilled-water buffer tank, … Read more
The control valve is where the controller’s intent becomes physical action. A perfectly tuned loop driving a poorly selected or improperly sized valve produces unstable, inefficient, and damaging operation. Yet control valve selection is often delegated to vendor catalogs without the engineering analysis required to match valve characteristics to the process. The consequence is a … Read more
Sensor placement pitfalls represent the single most common source of HVAC control system failure, yet they remain the least addressed during commissioning. The performance of any control system depends on the accuracy of its measurements. A perfectly tuned PID loop, a properly sized control valve, and a state-of-the-art building management system all become worthless if … Read more
The proportional-integral-derivative (PID) controller is the most widely deployed control algorithm in industrial automation. It governs every fast loop in a cleanroom, every cooling unit in a data center, and every motor speed regulation across precision manufacturing. Yet despite its ubiquity, PID tuning remains the discipline most frequently performed badly. Surveys of operating plants consistently … Read more