Engineered Systems - February 2009 - (Page Cover2) You Wouldn’t Throw Your Car in Reverse Driving Down the Highway. Why Would You Do the Same with Your Heat Pump? Desert Aire’s 100% Outdoor Air, Water Source, Non-Reversing Heat Pump Are 2-element reversing heat pumps taking you backwards when it comes to efficiency and functionality? You might ask, “Why would they?” The answer is found in Desert Aire’s non-reversing Q-Pump. A 2-element reversing heat pump uses only one air coil as both an evaporator and condenser – very inefficient since no one coil is designed to ideally perform both functions. Our 4-element Q-Pump uses one air condenser and one air evaporator, each one devoted to perform its function as designed. Our other two elements are water chillers in the water loop, one for the balance of the total heat of rejection and the other used as the evaporator in the reverse cycle. No reversing valve! The benefits of Q-Pump? • • • • • Avoids inefficiencies of high pressure on compressors when 2-element systems reverse to cooling No reversing valve allows for quick, easy transition between winter and summer modes Water chiller used as an evaporator in the water loop helps achieve COPs of 6+ Less potential for slugging and flashing compared to 2-element systems Q-Pump DOAS units control LAT to ± 2.0° F in heating and cooling Want more details and a diagram? Visit our special web page at: http://Q-Basics12.desert-aire.com Germantown, WI • Ph: (262) 946-7400 • Fax: (262) 946-7401 • E-mail: info@desert-aire.com DEHUMIDIFY WITH THE EXPERTS Input 114 at www.esmagazine.com/instantproductinfo http://Q-Basics12.desert-aire.com http://Q-Basics12.desert-aire.com http://www.esmagazine.com/instantproductinfo
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