Comfort At Work Application Area
Evergreen
Product Information
Introducing The World's Most Efficient Chlorine-Free
Chiller:
Carrier's Evergreen family of centrifugal
chillers.
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The Evergreen Chiller
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For the first time you don't have to choose between
high efficiency and environmental responsibility or operating
savings and long term protection from refrigerant phaseout. It's
the solution that offers you:
- No Compromises on Efficiency
- No Compromises on the Environment
- No Compromises on Safety
Choosing a Refrigerant
Before we could redesign our product line, we needed
to make sure that the refrigerant of choice would be protected
from any legislative phaseouts. It had to be safe, non-toxic,
and non-flammable. Since all chlorine bearing refrigerants will
be phased out, we didn't want to design a product using something
that has a limited life. Using refrigerants with very low allowable exposure limits (AEL) requires further safety precautions and equipment that are not needed when using HFC-134a. With carrier's Evergreen line of chillers our customers do not need to concern themselves with items such as:
Did I bring something potentially harmful into
my building?
or
Will I have to pay high prices for refrigerant
because it's in short supply due to phaseout (even worse, will
it even be available)?
Customers can be assured that Carrier engineers looked
at all the issues. The decision was made to use HFC-134a. It was
actually an easy decision when you consider the facts:
1). HFC-134a is one of the safest refrigerants used
today. So safe it's used in metered dose inhalers by asthma suffers.
The refrigerant propels the medication into the body. It also
has the highest safety rating given by ASHRAE (American Society
of Heating, Refrigeration, and Air conditioning Engineers).
2). Short supply is not a worry either. In fact
the uses for HFC-134a are growing every day. You can find it
in:
- Refrigerators
- Water Coolers
- Vending Machines
- Automobile Air Conditioners
- Rooftop Air Conditioners
- Split System Air Conditioners
- Medical Inhalers
- And of course, Evergreen Centrifugal Chillers.
Evergreen, the world's first centrifugal chiller
designed specifically for HFC-134a, was designed from the ground
up with our customers in mind. They demanded a number of key
items in this new product, and our engineers delivered:
- Packs a Big Punch for a "Lightweight"
- The Evergreen Chiller holds an interesting claim to fame. It is the world's highest efficiency, chlorine free chiller in the world. It also occupies the smallest volume, over 30% smaller than many of it's competitors.
How is this possible? Each part of the vapor compression cycle was optimized for HFC-134a. Heat exchangers, transmissions, and especially aerodynamics such as our patented tunnel diffuser technology developed in conjunction with our sister company Pratt and Whitney Jet Engines, also part of United Technologies, made this possible. Pratt is the largest jet engine manufacturer in the world, supplying the latest technology for customers like Boeing's 747 and new 777 jumbo jets.
We also made use of our patented turbine technology, another Carrier exclusive. This device recovers energy that is otherwise normally lost in the expansion phase of the cycle.
- Size
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Carrier realized that most of the chillers installed today are going into existing buildings where space is at a premium. Many machine rooms were literally built around the chilling equipment, leaving little space for future expansion or even replacement of old machinery. Besides occupying the smallest space in the industry, the Evergreen Chiller is also modular in construction. It's bolt together design allows the compressor, cooler and condenser to come apart, to be moved through an existing doorway, then to be reassembled in the machine room. This means that existing doorways are generally large enough to accommodate the chiller. There is no need to tear down walls just to get the machinery inside the mechanical room. This feature is another Carrier exclusive and comes standard on all Evergreen chillers.
- Reliability
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The Evergreen chiller's reliability story began 5 years ago with the introduction of the 19XL product line. Carrier's engineers capitalized on that very successful product and incorporated many of it's best features into the Evergreen line of chillers. "Items such as single stage compressor's optimize efficiency while keeping the number of moving parts to a minimum. Twenty five years of operating experience go into each hermetic compressor motor. Since they are refrigerant cooled, they run cooler and cleaner providing longer life while eliminating shaft seal leakage and machine room cooling associated with open drive designs.
All Evergreen Chillers are manufactured to meet stringent ASME (American Society of Mechanical Engineers) safety codes. An ASME authorized, independent inspector checks the weld quality and pressure tests of every machine going down the assembly line. They are also involved in the design process, making sure all required calculations are done per ASME code. For the customer this is an independent set of eyes watching and inspecting your machine as it is constructed.
- Environmental Responsibility and Safety
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HFC-134a is the clear choice for centrifugal machines as we go into the next century. It is so safe, it is used in metered dose inhalers to propel medication into the human body. So environmentally friendly it has no ozone depletion and is biodegradable. Simply put, there is no other refrigerant on the market any manufacturer should design a centrifugal chiller around. HFC-134a is the future of centrifugal chillers.
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