- Slides: 28
XDX® A Discussion Concerning Heat Exchangers: Shell and Tube Plate and Frame
Technology X-STREAM® 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. Click Here for view of Patented XDX® ABF HVFT Annular Flow 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.
A Typical Chiller Piping Diagram
A Typical Chiller Piping Diagram XDX® is retrofitted or factory installed downstream of the EEV or TXV
Conceptual Discussion on System Degradation Spectrum XDX Performance Efficiency Enhancement in Systems Based on Age of Unit XDX dramatically increases system sustainability
Secondary Loop and Refrigeration with XDX® 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
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
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®
What we delivered: XDX X-STREAM® 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 cold—and 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. 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 © 1999 -2011 XDX Innovative Refrigeration, LLC. 800 -939 -0250
Refrigeration: Chillers Standard Refrigeration is a leading Chiller Vessel OEM in the U. S. A. Standard Independently Validated XDX® The transient response test indicated that the time to reach a temperature of 44◦F 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.
DX Shell and Tube Evaporator Bundled Tubes Header for Tubes
The working Principle of A Shell and Tube Heat Exchanger
A Shell and Tube Heat Exchanger Thermal Imaging
Getting the Best Performance from A Shell and Tube Heat Evaporator Typical Design Logs Oil and Unnecessary Superheat Wastes Energy Typical operation logs oil, , as much as 11%, inhibiting its return to the compressor. This reduces heat transfer , lubrication , capacity, and efficiency. XDX® Operation allows Oil to return and Tightly Controls Superheat to Save Energy XDX®, once installed will return gallons of oil to the compressor, improving heat transfer , lubrication , capacity, and efficiency.
The working Principle of A Plate and Frame Heat Exchanger
The working Principle of A Plate and Frame Heat Exchanger 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.
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.
Thermal Imaging Identifies a Lack of Uniformity to Refrigerant Flow
As is consistent with thermal imaging, the plate has an area of typical flow pattern and mass flow
As is consistent with thermal imaging, the plate has areas of poor flow patterns and weak mass flow
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
X-Stream® Technology from XDX® provides the plate with a more uniform flow pattern Flow is variant and Oil logging is typically prevalent Flow is improved, Oil logging is minimized with XDX®