July 1, 2010
Features
This article will present an alternative central-chiller-plant model, one that is consistent with the laws of thermodynamics and can be executed with a laptop computer. The model will be demonstrated based on an assumed chiller plant operating at design weather conditions in Salt Lake City. ...
The concept is straightforward: Condition and deliver fresh ventilation with a dedicated outdoor-air system (DOAS) to treat outdoor air and space latent loads efficiently. ...
Columns
Ten years ago, HPAC Engineering published an editorial on the impact of the growing population on America's infrastructure and our ability to feed, clothe, and employ the increasing number of people. Back then, our friends in the U.S. Census Bureau were predicting that by the year 2100, the population of this country would be around 571 million—more than double the population at that time (270 million)....
The DOE has a new general counsel, Scott Harris, who, admirably enough, has made it his mission to ensure that his department effectively and efficiently enforces federal efficiency rules. Therefore, the DOE has started to enforce minimum federal appliance efficiency standards, as well as its regulations that require manufacturers to certify compliance with applicable standards before distributing products in commerce, aggressively....
One result of America's growing water shortages likely will be an increased public-policy focus on water conservation, water-efficiency technologies, and on-site water treatment and reuse. This policy focus could offer unprecedented opportunities for mechanical contractors, technology suppliers, and engineering consultants....
I enjoyed the article "Improving Efficiency With Variable-Primary Flow" (by James J. Nonnenmann, PE, and Daniel J. Flynn, PE, April 2010, http://bit.ly/9LklBK), but would like to know more about the controls. How are the chillers staged on and off?...
Departments
Embarking on the restoration of Lloyd Street Synagogue in Baltimore—built in 1845, the oldest synagogue in Maryland and the third-oldest in the nation—Jewish Museum of Maryland trustees, the architect, and the general contractor knew every choice they made would be under intense scrutiny from the Maryland Historical Trust....
The vice president of operations for Scottsdale, Ariz.-based Arby's-restaurant franchisee FX4 ("Fantastic Food, Fast & Friendly"), Jay Johnson had tried everything to reduce electricity consumption at each of the company's 55 locations, including reminding employees to turn off air conditioners at night and covering programmable thermostats with lockboxes. Nothing worked. ...
To meet the needs of a growing under-18 population, Logan City School District in Logan, Utah, embarked on an expansion of Woodruff Elementary School...
In 2008, the University of Minnesota made a public commitment to reduce its overall energy consumption by 5 percent by June 2010. With 323 buildings on two campuses located 150 miles apart, it reached out to Johnson Controls to integrate systems with no disruption in day-to-day operations....
Water dripped from the windows and mold grew on the walls of a series of upscale urban condominiums. Other experts had ruled out water leakage. I arranged to visit several units....
News & Notes
The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) installed officers and directors during its 2010 Annual Meeting, held June 26-30 in Albuquerque, N.M. ...
McQuay International and parent company Daikin Industries Ltd. celebrated the grand opening of the new Daikin McQuay Solutions Plaza in Jersey City, N.J., May 18....
The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) recently announced the publication of ANSI/ASHRAE Standard 62.1-2010, Ventilation for Acceptable Indoor Air Quality....
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