XDX A Discussion Concerning Heat Exchangers: Shell and Tube
Plate and Frame
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A.R.M.E.D. Technology A.R.M.E.D. (Adjustable Refrigerant
Metering Evaporator Device) helps improve the effectiveness of the
Mysticool Max. It works in tandem with X-Stream Technology to
improve the characteristics of refrigerant flow throughout the
entire evaporator coil. A.R.M.E.D. helps fine-tune the system by
allowing regulation of the refrigerant flow through pressure drop.
It also permits the fine adjustment of liquid flow into the valve,
which allows the correction of overfeeding and underfeeding. It is
designed with multiple orifice settings and is installed directly
after the expansion valve, replacing the distributor orifice. X-S
TREAM Technology X-Stream Technology is the main component of XDX
technology. It was developed with the mindset that heat transfer is
the most important aspect of cooling and that vapor has a role to
play in the refrigeration system. The technology optimizes the
refrigerant flow and the resulting heat transfer capability with
the evaporator by using vapor refrigerant to force a film of liquid
refrigerant around the circumference of the inner walls within the
evaporator tubing. The result is unparalleled performance,
superheat stability and more consistent evaporator surface
temperatures, which minimizes frost build-up and expedites
pull-down temperatures. T echnology Click Here for view of Patented
XDX ABF HVFT Annular Flow
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Pre-Retrofit
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Conventional
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Post-Retrofit
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XDX
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A Typical Chiller Piping Diagram
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XDX is retrofitted or factory installed downstream of the EEV
or TXV
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System Degradation Spectrum XDX Performance Efficiency
Enhancement in Systems Based on Age of Unit XDX dramatically
increases system sustainability Conceptual Discussion on
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Wineries Attention to detail Producing a high quality wine
takes time and attention to detail. And one of the key components
in this process is refrigeration. From the fermentation period,
when cooling coils are necessary to keep the grape juice at a
consistent temperature; throughout the cold-stabilization process,
when the time-to-temperature relationship can affect profitability;
and into the higher loads of the exothermic period during harvest,
refrigeration is paramount. Controlling the process Any variance in
refrigeration performance during the winemaking process can have a
disastrous effect. Quality is at stake when equipment cannot
perform to expectations during warmer temperatures, or when the
temperature control is less than desirable. And the high cost of
the energy necessary for refrigeration can have a negative effect
on the profitability of the winemaking venture. 1999-2011 XDX
Innovative Refrigeration, LLC. 800-939-0250 Secondary Loop and
Refrigeration with XDX
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Artesa Vineyards Location: Carneros, Calif. Innovative
refrigeration helps winery save energy while producing quality wine
It is the dedication of a winery to detail that produces a great
wine. One visit to Artesa Vineyards in Carneros, Calif., and the
attention directed toward detail is evident. From the modernistic
architectural design and the glass masterpieces of a local artist,
to the great effort to blend the facility into the natural terrain,
this 400-acre-facility radiates detail. Challenges: Refrigeration
plays an important role in wine production. From the fermentation
process, where cooling coils are necessary to keep the grape juice
below 30 degrees Celsius; throughout the cold-stabilization
process, when the time-to-temperature relationship can affect
profitability; and into the higher loads of the exothermic period
during harvest, the importance of consistent temperatures is a main
focus. Refrigeration issues often are noticed only when the
equipment cannot perform to expectations during warmer
temperatures, or when the temperature control is less than
desirable. Artesa had discussed possible improvements and equipment
additions that would provide the needed performance as well as
reduce energy costs. When they learned about a Pacific Gas and
Electric project that featured an energy-saving technology from XDX
innovative Refrigeration, they decided to give the new product a
try. 1999-2011 XDX Innovative Refrigeration, LLC. 800-939-0250
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Refrigeration: Chillers Chiller as Historically Operated (Left)
and unable to cool uniformly until after the installation of XDX.
At the right is the post installation operation with XDX
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What we delivered: XDX X-S TREAM valves, which improve
evaporator performance and deliver more consistent temperatures,
were installed in the existing refrigeration system at Artesa. The
improvement in evaporator performance has had dramatic and
beneficial results. Results: The plant maintenance engineer reports
a significant improvement in how quickly the tanks get coldand stay
cold. As a result, the cold-stabilization process takes less time.
The winery can now run up to eight of its 10,000-gallon tanks at a
time. In addition, refrigeration compressors cycle off more often,
which delivers a significant energy savings and helps maintain the
winery's high quality while managing overhead. 1999-2011 XDX
Innovative Refrigeration, LLC. 800-939-0250 What our clients have
to say: "I want the highest quality and to get the highest quality,
we must focus on every detail of the process. Having the
refrigeration work as well as it does allows us to focus on the
product What all quality winemakers have in common is that we need
control of the process. XDX has helped us in the control of the
process."Artesa winemaker Don Van Staaveren
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The transient response test indicated that the time to reach a
temperature of 44F with the XDX valve at the entrance to the
evaporator was approximately one-half the time required to reach
the same temperature without the XDX valve. Refrigeration: Chillers
Standard Refrigeration is a leading Chiller Vessel OEM in the
U.S.A. Standard Independently Validated XDX
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DX Shell and Tube Evaporator Bundled TubesHeader for Tubes
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The working Principle of A Shell and Tube Heat Exchanger
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Thermal Imaging A Shell and Tube Heat Exchanger
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Typical Design Logs Oil and Unnecessary Superheat Wastes Energy
XDX Operation allows Oil to return and Tightly Controls Superheat
to Save Energy Getting the Best Performance from A Shell and Tube
Heat Evaporator XDX, once installed will return gallons of oil to
the compressor, improving heat transfer, lubrication, capacity, and
efficiency. Typical operation logs oil,, as much as 11%, inhibiting
its return to the compressor. This reduces heat transfer,
lubrication, capacity, and efficiency.
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The working Principle of A Plate and Frame Heat Exchanger
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Plates allow for refrigerant flow on one side, and a secondary
medium on the alternate side of each plate. Each brand of heat
exchanger attempts to direct flow through varying patterns of
openings and passage ways.
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Plates Plates allow for refrigerant flow on one side, and a
secondary medium on the alternate side of each plate, using
gasketing material to isolate flow.
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Thermal Imaging Identifies a Lack of Uniformity to Refrigerant
Flow
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As is consistent with the thermal imaging, the plate has an
area of typical flow pattern and mass flow
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As is consistent with the thermal imaging, the plate has areas
of poor flow patterns and weak mass flow
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The plate also has areas of minimal flow patterns and poor mass
flow; these areas log oil As much as 9% of the heat transfer
surface can be inhibited by Oil logging
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X-Stream Technology from XDX provides the plate with a more
uniform flow pattern Flow is improved, Oil logging is minimized
with XDX Flow is variant and Oil logging is typically
prevalent
