Optimized Modulation for Buildings - Emerson · PDF fileOptimized Modulation for Buildings Enjoying Energy Savings and Superior Comfort Emerson Climate Technologies at a Glance ...
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Emerson Climate Technologies - European Headquarters - Pascalstrasse 65 - 52076 Aachen, GermanyPhone: +49 (0) 2408 929 0 - Fax: +49 (0) 2408 929 570 - Internet: www.emersonclimate.euThe Emerson Climate Technologies logo is a trademark and service mark of Emerson Electric Co. Emerson Climate Technologies Inc. is a subsidiary of Emerson Electric Co.Copeland is a registered trademark and Copeland Scroll is a trademark of Emerson Climate Technologies Inc.. All other trademarks are property of their respective owners.Information contained in this brochure is subject to change without notification.
High level of expectation - it is recommendedfor spaces occupied by very sensitive and fragilepersons with special requirements
Normal level of expectation - it should be usedfor new buildings and renovations
An acceptable, moderate level of expectation- it may be used for existing buildings
Values outside the criteria for the abovecategories - this category should only beaccepted for a limited part of the year
Category of Building according EN15251
Major pollutants present in the majority of building stock
4 5
All this being said, the optimization can only bedone through a precise, air flow and well controlledair humidity and temperature.• Air Handling Unit (AHU) systems connected to a chiller and a
boiler are commonly used today. Such system requires auxiliaries
like a buffer tank and a water pump which does not contribute
to energy saving. Secondly heat recovery is not easy to implement
in such a system.
• Direct expansion (DX) systems (split) are either packaged
(Rooftops) or AHU + condensing unit. These units provide better
installed cost and higher efficiency than the standard AHUs with
chiller and boiler but lower comfort.
In fact:
- Capacity modulation by cycling standard compressors on
and off is not enough
- The limited number of compressor starts and stops per hour
further reduce the possibility of modulation
This results in:
- Wide variation of the space temperature: poor comfort
- Limited possibilities for supply air temperature modulation:
limited possibilities for energy saving
To prevent all these drawbacks, wide compressor modulation, able
to function at the very minimum capacity, is a must. The Copeland
Scroll Digital™ has the ability to do so. With a minimum capacity
of 10% versus the nominal, it will be able to adjust the capacity and
overcome all the issues mentioned above.
The Copeland Scroll Digital™ is capable of seamless modulation
between 10 and 100% of the nominal capacity allowing for
immediate load adjustment, and close temperature control
(± 1 K) for optimal comfort. Capacity modulation for this type of
DX systems will allow a reduction in air flow resulting at the very
minimum in significant energy saving from the supply fan.
In addition, the DX solution allows other (or new) heat recovery