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Irvine, CA, United States

Hallenbeck M.,Southland Industries
ASHRAE Transactions

The BRAC 133 Building in Alexandria, Virginia is a 1.7 million square foot office tower owned by the Department of Defense. The building utilizes an innovative Fan Powered Induction Terminal Unit (FPIU) system with Outside Air (OSA) provided by a Dedicated Outdoor Air System (DOAS). The building is programmed to achieve LEED NCv2.2 Gold status with an energy savings of 24.7% over the ASHRAE 90.1-2004 baseline system. The Fan Powered Induction Unit is a modified series fan powered variable air volume terminal unit equipped with a filter, primary (outside) air valve, supply air fan and Electrically Commutated Motor (ECM), heating coil and sensible only cooling coil. Dehumidified OSA is supplied to the zone for humidity and CO 2 concentration control. Induced air is filtered and then cooled or heated through the use of a sensible only cooling coil, or heating hot water heating coil. Induced air is supplied to the space along with outdoor air to maintain the zone temperature, humidity and CO 2 level set-points. The building is supplied with two chilled water cooling loops. A 42°F [5.6°C] latent chilled water loop utilized for dehumidiflcation of outdoor air and cooling in zones where a high latent load is present. A 55°F [12.8°C] sensible chilled water loop is utilized to provide sensible only cooling to the fan powered induction units and Information Technology (IT) loads. The use of the warmer, sensible chilled water loop yields significant increase in water side economizer usage along with increased chiller efficiency. The net result is a high efficiency cooling system that provides optimal occupant thermal comfort. ©2012 ASHRAE. Source

Volgyi M.,Southland Industries
ASHRAE Journal

The Kaiser Downey Medical Center in Downey completed a new project of a 657,800 gross ft 2 acute care hospital and central utility plant. The most significant challenge of the project was the aggressive schedule for design, permitting, and construction. The building is served by 18 air handling units (AHU), each major department is provided with a separate unit. This allows similar rooms with similar characteristics to be served by the same unit, eliminating unnecessary overcooling and reheating of spaces with diverse uses. A 100% outdoor supply air building air-handling system serving all patient and staff support areas provides a great advantage regarding indoor air quality, with ventilation rates well in excess of the ASHRAE Standard 62.1-2004 minimum ventilation rates. The air moving equipment fire alarm shutdown strategy was developed with considerations to air-handling unit fan fire alarm shutdown and the strategy was developed with the fire alarm designers and electrical engineers. Source

Boothe N.,EXP Inc | Crossey D.W.,Lovorn Engineering LLC | Harris J.,Mechanical Engineering | Mclaughlin M.,Southland Industries | Sheerin M.,Health Care Engineering
Consulting-Specifying Engineer

Among the most challenging aspects of hospital projects is insufficient capital for the best value design. It is easy to implement low-cost options, but in an environment of limited capital budgets, more expensive or comprehensive options often lack the support for funding. When determining mechanical, electrical, plumbing (MEP), and fire protection system design, accurate, reliable, and unbiased budgets must reflect first costs and total cost of ownership. Excess capacity should also be factored into initial budgets. Too often design teams value engineer extra capacity out of design to save on first costs. Total cost of ownership should include the ramifications of limiting or eliminating excess capacity. Source

The dual chiller plants were used to achieve energy efficiency for federal office buildings located in humid climates, specifically in Washington, D.C. The design team based its energy strategy on the concept of providing a latent and sensible (dual) chiller plant design with the ability to de-energize both chiller plants at ambient temperatures of approximately 50 F and below, and increasing the availability of the full water side economizer. Fan energy was addressed first by reducing the facility's supply air to appropriate ventilation levels. Reducing the distribution airflow saves fan energy but significantly limits the effectiveness of the air side economizer. To make the proposed dual plant design possible, all zones and sensible loads had to be combined with the sensible loop. Chiller plant equipment selection followed with multiple chiller and tower combinations. Anticipated LEED energy savings for the facility were calculated to be 24.66% resulting in 5 credits. Source

Ford C.,Southland Industries | Stanfield S.,Southland Industries
HPAC Heating, Piping, AirConditioning Engineering

The learning curve in innovation and the challenges of green HVAC systems in new construction and renovation is explored. Collaborating with owners and architects to understand their required ROT timeline enables contractors to identify cost-effective strategies and win support of innovative solutions. Collaboration is critical, and so engineers and construction teams should look for opportunities to achieve the same energy goals with the most cost-effective solutions. A documented schedule will provide the framework within which the project takes place. Short-term changes will be more easily accommodated if there are open channels of communication. As the systems installed in to- day's buildings increase in complexity, it is critical that maintenance personnel have the expertise and background knowledge of the installed systems to operate them at peak efficiency. Source

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