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Revised ASHRAE Book Updates Ground-Source Heat Pump Systems

Posted by Lisa Iannucci

Mar 14, 2015 8:50:00 AM

The use of ground source heat pump systems has grown over the last two decades, so ASHRAE has updated its book on design, strategies and applications. 

THE GROUND SOURCE HEAT PUMP INDUSTRY IS A VICTIM OF ITS OWN SUCCESS, says Kevin Rafferty, a consulting engineer from Klamath Falls, Oregon and the co-author of a newly published book from ASHRAE, “Geothermal Heating and Cooling: Design of Ground-Source Heat Pump Systems (GSHP).”


“Years ago, the struggle was to simply get design teams to consider using the technology,” he says in the release. “There is now fairly wide recognition of the benefits of GSHP systems, particularly on the part of building owners in the schools and office building sectors, where the technology has achieved its highest penetration rates.”

However, he also says that there is a widely held view that anything bearing the name ‘geothermal,’ ‘ground source’ or ‘earth energy’ will produce the desired high efficiency/low operating cost.  “As a result, poorly designed systems are often installed and building owners expectations are unmet,” he says.

Rafferty and co-author Steve Kavanaugh, professor emeritus at the University of Alabama, wrote a revision of the book that was first published 17 years ago when ground source heat pumps were primarily used in residential settings. This updated version provides benchmarks, design strategies and information necessary for engineers to configure the most efficient and cost effective systems and avoid problems such as inefficient pumping, high cost ground loop designs, inadequate outside air provisions, unnecessarily complex control schemes and other common design errors.

The revision also includes coverage of close-loop ground (ground-coupled), groundwater, surface water, GSHP equipment and GSHP piping as well as a new hydro-geological chapter. There are field studies, energy and demand characteristics and more. The cost of “Geothermal Heating and Cooling: Design of Ground-Source Heat Pump Systems” is $128 ($109 for ASHRAE members).

The website, www.ashrae.org/bookstore, offers a preview of the book. To order, contact ASHRAE Customer Contact Center at 1-800-527-4723 (United States and Canada) or 404-636-8400 (worldwide), or visit www.ashrae.org/bookstore.

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