Taco Inc. sponsored content 2016-01-08 15:11:01
When mechanical engineers and installers, architects and building owners have the rare luxury of designing a new facility specifically to meet or exceed energy efficiency and indoor comfort needs, big dreams become a reality. The key to this imaginative plan: smaller, smarter mechanical systems that wrench every last BTU from super-efficient ground-source heating and cooling systems. “I don’t know that you’ll find a more efficient mechanical system than the one now installed at the new Penn Foundation facility,” said Glenn Snyder, PE, a VP with architect and engineering firm, Lederach Associates. He’s referring to mechanical components that were recently brought together at Penn Foundation, then connected by a modular control network to serve as the building’s central nervous system. The new 36,000 square foot, two story addition to the mental health facility not far from Allentown, PA puts geothermal systems to good use. “But the real uniqueness of this job is the way BTUs are removed from or delivered to enclosed spaces,” explained Greg Cunniff, application engineering manager for Taco, Inc. “Different water temperatures are readily available for a variety of terminal units from a single-pipe system because they used Taco’s LOFlo injection mixing blocks to blend supply and return water temperatures from the main,” continued Cunniff. “Injection mixing provides the perfect balance of everything designers, installers and building owners most want,” he added. “Their master list of essential needs included performance, efficiency, compact size, quiet operation, comfort and IAQ—especially important for a health facility.” From Underground to Overhead Circulation for Penn Foundation’s geoexchange system is possible with the use of Taco’s KS series vertical in-line pumps. The water-to-water geothermal system feeds a total of 176 chilled beams and a few other terminal units. A single-pipe distribution system tied to the LOFlo blocks saves space, installation time, initial cost and operating expense. Taco’s iWorX® control system monitors room temperature, supply water temperature, dew point, and circulators connected to the stainless steel mixing blocks. The new BAS also controls circulation in the geoexchange field, water-to-water units, DOAS and remote heat pumps. The facility’s fresh air is supplied through the chilled beams, via the DOAS, which in turn increases the capacity of the active chilled beams. “Coupling the LOFlo distribution system with iWorX controls and geothermal equipment provides the most energy efficient HVAC system available today,” said Cunniff. Challenges: Solved “Because of tight space restrictions, we offered the single-pipe, LOFlo system as an alternative to ducted air or a four-pipe, fan coil system,” said Cunniff. “This reduced the number of pipes to two—one for heating, and one for cooling—and because of its low flow we can use a very large delta-T which shrinks the size of the pipes needed.” The iWorX, chilled beam and geothermal combination is estimated to provide a $12,000 yearly energy savings over a standard water source heat pump system. System designers used Taco’s HSS (Hydronic System Solutions®) to design the majority of the system piping and cascading temperatures. “The project is a great example of what can be accomplished when manufacturers, engineers and contractors all work together for a common goal,” concluded Snyder.
Published by Forester Media. View All Articles.