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.

Question:    Aaon will provide you with the lowest defrost cycle time due to what design component?

                   a.) Electric Heat   b.) Energy Recovery   c.) Hot Gas Bypass On All Circuits   d.) Digital Scroll Compressor

Prize:         Magellan SE4 GPS

Respond by August 13^th with the correct answer to be entered in the raffle for this month’s prize!

Question:  Per ASHRAE, what is the max accepted air velocity over the body in an unaffected neutral environment? 

Answer:    c.) 50fpm.  Congratulations to Jim Rollence for winning a $50 Golf Galaxy Gift Certificate!

 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

Air Source Heat Pumps

 

Single Zone VAV Heating & Cooling

This off‐peak measure will provide significant energy savings. On its own, the measure will not provide demand reduction, but

saves energy during part‐load conditions by reducing the supply fan speed and unloading the compressors when less heat is

needed.

 

The supply fan airflow is modulated based on space temperature. As less heating is needed the supply air flow is reduced. As

the airflow across the indoor coil is reduced, discharge air temperature will tend to rise. The system will reduce compressor

capacity to maintain a constant discharge air temperature. The reduction in compressor capacity provides a reduction in

compressor power usage and saves energy.

 

Because fan power is proportional to the cube of the fan rotational speed, at 1/2 fan speed, the supply fan energy will be only

1/8 of the design horsepower! Compressor power is proportional to the saturated discharge temperature and the saturated

suction temperature. Such that as the saturated discharge temperature is reduced the compressor power usage is reduced.

 

A single zone system is great for saving energy at part load and can be designed to regulate one room or space that might be

used periodically but needs to be able to react to greatly increased heat loads in a short space of time.

Applications:

· Classrooms

· Restaurants / Cafeterias

· Retail Stores

· Theaters

· Conference Rooms

· Offices

· Places of Worship

· Gymnasiums

· Kitchens

· Libraries

· Auditoriums

· Reception Areas

Standard heating options are available for either auxiliary heating or emergency backup heating.