Vincent A. Sakraida, P.E.

Sakraida is a principal engineer with Sakraida & Associates, LLC (Denver, CO) which is a consulting and forensic engineering firm. He has 30 years experience in the design, construction, and operation of cleanroom, pharmaceutical, laboratory, and other high-technology facilities. He is a member of ASHRAE, ASHE, ISPE, and IEST. He can be reached at bsme82@comcast.net.

ARTICLES

Critical Facility Mechanical Equipment And System Reliability

Come to terms with the key terms, and learn how to wrestle with the cumulative effect as each component tries to edge the overall system reliability downward.
In today’s world, so-called “high-performance, sustainable” facilities are a dime a dozen. But many of these buildings rely on overly complex mechanical systems to carry out their mission.
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Cleanroom Variable Airflow Design

Appropriately enough, a good variable airflow design accommodates and refines a number of design variables. Particle monitoring strategies, minimum supply air calculation, HVAC sequencing, and space pressurization are just a few stops on the way to spotless performance.
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Basics For Absorption Chillers

If motor-driven vapor compression chillers are much more energy efficient than absorption chillers, then why are we even having this conversation? In a hunt for LEED® points or in applications with certain demands, absorption could be just the ticket to sustainability and/or economy.
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Basics For Refrigerant Chillers

That pretty much covers it. You know, design options, performance standards, part-load values, operating factors, and more. Use it as a quick brush-up, or pass it along as a handy reference.
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Cleanroom Design in 10 Easy Steps

OK, so “easy” may not be a word that comes to mind for designing such sensitive environments. However, that doesn’t mean you can’t produce a solid cleanroom design by tackling issues in a logical sequence. This article covers each key step, down to handy application-specific tips for adjusting load calculations, planning exfiltration paths, and angling for adequate mechanical room space relative to the cleanroom’s class.
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Manufacturing The Right Moisture

In addition to serving as a handy reference on the various dehumidification technologies and their profiles, this article uses a manufacturing scenario to explore load-related questions and other design pitfalls. Will human occupancy make much of a difference? What valves does your humidifier have? And exactly what’s in that room, anyway?  
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