The capacity of a compressor is measured in Btu per hour (Btuh) or Btu per minute (Btu/min). Remember, there are 12,000 Btuh or 200 Btu/min in one ton of refrigeration. The capacity of a piston-type ...

A shift to angular and polar coordinates offers control engineers a more physically rigorous, PID-friendly approach ...

The APR control provides full-capacity modulation for direct-expansion a/c systems of all sizes. Responding to changing conditions, the unit controls temperature and humidity to maximize comfort and ...

Although digital control systems—distributed control systems, programmable logic controller, and other automation equipment—are present in practically every process safety management (PSM) facility ...