October 1, 2011
Features
Accurate calculation of evaporation from swimming pools is needed for proper sizing of ventilation and dehumidification equipment. Calculations are needed for both occupied and unoccupied conditions for proper modulation of equipment capacity, as well as estimation of energy consumption. ...
The original pool dehumidification unit (DHU) used heat of rejection from the refrigeration system to heat pool water and provide hot-gas reheat. The system MASA chose (IDECVAV) is a direct-fired, variable-volume, 100-percent-outdoor-air unit equipped with an indirect evaporative precooler used to provide sensible cooling and heating-season energy recovery...
Editor’s note: The following is a continuation and conclusion of the article “Primary/Secondary-Loop vs. Primary-Loop-Only Systems,”1 published in the December 2010 issue of HPAC Engineering....
Manufacturers and designers of air-conditioning, refrigeration, and heat-pump systems must determine the process that will be used for evacuation, charging, and run testing their systems. Valves and process tubes provide the necessary access to the system, but before implementing a solution users must consider the factors specific to each application, including ease-of-use, flow rate, leak rate, cost, and field-service requirements. ...
Columns
Once upon a time, in the early days of the 20th century, man built things to last. Commercial and residential buildings were constructed with stone or brick and roofed in slate. Until fairly recently, nobody thought of them as being "green." Now, there is talk circulating among architects and builders who praise such old buildings with regard to the envionmental benefits of working with them. ...
Selecting the right design professionals and builders is an essential step in undertaking a successful sustainability project. Experienced sustainability professionals will help you realize your sustainability goals and help ensure a project is a financial and environmental success....
Departments
What started as a simple swap-out of mechanical systems in two small dormitories in 2007 has turned into a multiphase, cross-campus crusade to change buildings from a 60-year-old central steam heat system to high-efficiency, single-structure hydronic equipment for The Williston Northampton School...
Jackson County worked with Kristi Hubbard, CEM, of McElroy’s Inc.’s Building and Energy Solutions Team on a detailed energy-conservation plan that would allow it to operate the building’s mechanical systems at peak performance while lowering operating costs and increasing comfort...
At the University of North Florida (UNF) in Jacksonville, Fla., labor savings was the primary driver for a carefully orchestrated control strategy, one that gives chilled-water-plant personnel computerized remote control of chilled water and cooling-tower operation. With more than 50 Belimo actuated control valves in the UNF chiller plant alone, facility personnel can mix and match chiller and cooling-tower operation seamlessly via an Andover Continuum building-management system (BMS) according to load or other requirements. ...
News & Notes
Eighty-eight percent of facility professionals consider their workplaces better prepared for an emergency situation than in 2001, with fewer than 2 percent saying they are less prepared, according to the results of an International Facility Management Association (IFMA) emergency-preparedness survey. Additionally, 91 percent report having emergency evacuation procedures in place, while 80 percent say their organization has a crisis communication and disaster recovery plan....
Providence St. Peter Hospital in Olympia, Wash., will receive $25,000 in products and services as grand-prize winner in Siemens Industry Inc.'s 2011 Smartest Building in America Challenge....
LonMark International, a global membership organization dedicated to efficient and effective integration of open, multivendor control systems, is accepting submissions for its “Best of the Year” awards program. ...
Effective Jan. 1, 2012, all certification programs under the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) umbrella—ARI Performance, GAMA Efficiency Rated, and I=B=R—will be brought under one certification program and logo: AHRI Certified. ...
Armacell LLC has launched a channel on YouTube featuring a series of instructional videos related to its Armaflex brand of flexible, fiber-free mechanical insulation. ...
The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) is seeking public comment on three proposed addenda to ANSI/ASHRAE Standard 62.1-2010, Ventilation for Acceptable Indoor Air Quality:...
Calendar of upcoming events in the HPAC Engineering industry...
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