Design Solutions
Design Solutions is a department in HPAC Engineering devoted to case studies describing how heating, ventilation, air-conditioning, and refrigeration challenges were overcome through the application of sound engineering practices and new equipment, tools, and ideas.
Most Recent
An Internet company committed to running green facilities was facing cooling and maintenance challenges at several of its data centers. Airborne debris, such as cottonwood seed, insects, and leaves, was getting drawn into crossflow cooling towers, resulting in the fouling of fill, sumps, and strainers; reducing overall operational efficiency; and increasing maintenance and energy costs....
Using information specific to the facility, Cifello presented retrofit options that would increase Decas Cranberry’s energy efficiency and reduce its carbon footprint. He recommended the company install an advanced Hawk integrated control system....
Use of fabric-ducted zones prevents thermal decay...
War Stories
War Stories is a department in HPAC Engineering devoted to readers’ recollections of particularly challenging experiences in the field and the lessons learned.
Most Recent
Boilers experience cyclic stresses every time a burner starts and stops. Those stresses occur because the boiler structure resists the expansion and contraction that otherwise would occur from temperature change. The higher the firing rate, the greater the stress. ...
The contractor was about to start installing new coils to replace coils that froze when the director of engineering called to go over my design....
The corridor air-handling unit (AHU) in a high-rise was reported to be inoperative. The resident manager indicated the duct traversed a long shaft between...
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