PPORTUNITY

Welcome to    PPORTUNITY, a monthly newsletter provided by Jacco & Associates. Jacco’s focus on engineering and design concepts will improve your HVAC system while significantly reducing design time, making you more productive for your clients.

 61 Milford Dr.  Hudson, OH  44236  Phone:(330) 463-0100  Fax:(330) 463-0101

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Questions or comments? E-mail us at opportunity@jacco.com

Question:  In an active chilled beam (ACB) application, increasing the end of the run static pressure from 0.4” to 1” will increase the ACB capacity by what percentage?

Answer:    C—55%. Congratulation to James Wilbanks for winning a Sony Walkman!

Aaon continues their legacy of innovative HVAC systems with the use of Copeland’s Variable   Capacity Compressors (VCC).  VCC’s can modulate from 10 to 100%, providing energy savings and tighter temperature control compared to standard on-off compressors. 

 

HVAC equipment typically spends 95% of its time running at part load, where VCC’s are most  effective.  On CAV systems this means you can remain at part load to maintain space temperature and provide greater dehumidification.  On VAV systems you can eliminate hot gas bypass        altogether, translating into even more energy savings. 

 

How do VCC’s work?  The capacity is modulated through a pulse width modulated signal to a  solenoid valve.  The compressor motor operates continuously, however the pumping operates in two stages—”loaded state” and “unloaded state.”  During the loaded state the compressor        operates like a standard scroll compressor and delivers full capacity and mass flow.  During the unloaded state, there is no capacity and no mass flow from the compressor. 

 

How much can this system save in energy?  On CAV systems you can see up to 20% and on VAV systems up to 50% versus typical on-off or hot gas bypass compressors.

 

Aaon is currently running a promotion on Variable Capacity Compressors by providing them at

NO ADDITIONAL COST

through April 15, 2009!  Take advantage of this opportunity to save your customers money!

 

Want to know how much energy Aaon’s Variable Capacity Compressors can save you?  Call and ask for an energy comparison versus an on-off/hot gas bypass compressor.

Variable Capacity Compressors

Aaon’s D-PAC unit was named Product of the Year by the readers of Consulting-Specifying Engineer Magazine. 

Go to www.csemag.com for more information.