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Commercial Line CardTHERMAL ENERGY STORAGE
DYNAMIC ICE HARVESTING FOR AIR CONDITIONING FOR PROCESS COOLING
TURBO: A leadership company in a corporate family of Industry Leaders
TURBO Refrigerating Company was founded in 1952 to provide specialized ice making and industrial refrigeration systems. TURBO pioneered itself as the leading world supplier of this technology, having built over 70% of the industrial ice harvesting capacity for consumer packaged ice. Today TURBO is the world leader in ice harvesting Thermal Storage Systems and industrial chillers, each a recognized leader in its specialized field.
Unlike other thermal storage systems, the TURBO ice harvesting design uses an ice-making surface that is completely separate from the ice storage tank. The ice-making surface consists of stainless steel plates that are welded together to form computer-designed internal channels for controlled flow of refrigerant. Water is distributed uniformly over the outside of the plates. Theplates are grouped vertically in modules directly above the ice storage tank. Ice forms on both sides in sheets 1/4" inch thick. Then, at predetermined intervals, hot refrigerant enters the plates, causing the ice to break away and drop into the tank. The ice breaks into small pieces in the tank.
The cycle is repeated as long as there is need for additional cooling reserves. TURBO ice gives a tremendous amount of heat transfer area, allowing very rapid melting with no risk of short circuiting of the return chilled water.
This continuous ice making capability is impossible with systems where heat transfer coils are submerged in ice storage tanks-because the ice making surfaces become encased in ice, insulating the heat transfer surface and reducing the efficiency of the system, while waiting for a thaw before production can resume.
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The TURBO ice maker operates as an efficient chiller when the cooling rises above ice making capacity.
TURBO ice makers inherently operate efficiently as chillers. You don't need a separate evaporator section, additional, refrigerant control valves, a large refrigerant charge or complex controls.
Or it's heat pump
Harvesting ice makers are extremely efficient ice-source heat pumps. Heating with ice can be substantial side benefit or it can be the primary function. Because ice is not stored on ice-making surfaces, the system can operate continuously-which means uninterrupted delivery of heat.
Typical compressor and condenser operating temperatures provide attractive coefficients of performance. By taking advantage of time-of-use electric rates now available from most utilities, heating with ice-source heat pumps can be significantly less expensive than burning oil or gas.
The system provides an ideal answer for day cooling/night heating... or summer cooling/winter heating. Winter ice inventories can easily be managed by solar melting, waste heat melting, discharge to river or pond, or by physical removal. Design flexibility is unmatched by any other system.
All off-peak hours can be fully utilized for maximum cooling with minimum investment.
With other systems, to handle increased cooling loads you need more compression and heat transfer equipment. With TURBO ice harvesting, you only need a bigger ice storage tank. The tank can be located indoors, outdoors, underground-anywhere that will allow mounting of the mechanical package above the storage tank. Tanks can be concrete, steel, fiberglass-whatever works out most economically for your requirements.
Constant compressor suction temperature means greater efficiency, longer life.
With other ice-storage techniques, suction temperature drops throughout the ice-building period. Lower suction temperature means reduced capacity, and higher energy consumption. With TURBO ice-harvesting equipment, suction temperature is relatively constant since sections harvest sequentially, improving efficiency and extending compressor life.
Packaged systems result in most economical installation.
Turbo's packaged unit concept eliminates extensive field assembly and ensures single source responsibility to optimize components resulting in the most economically installed and operating system.
Daily load shifting.
All the ice needed to meet cooling requirements during an on-peak period is produced and stored during the previous off-peak period. Typically ice is produced at night and melted the following day. Demand charges are avoided entirely.
Daily load leveling.
Only part of the cooling needed for an on-peak period is provided by melting ice produced during the previous off-peak period. The rest is supplied by on-peak operation of the ice make as a chiller. Demand chargesare greatly reduced, but not totally avoided.
Weekly load shifting
Here's where Turbo's ice harvesting system excels beyond any other thermal storage system. Particularly with buildings that are closed nights and weekends. That's because every weekend hour is productive. Ice is produced during all off-peak hours, including Saturday and Sunday. The ice is stored and gradually melted as needed over the course of the week. Demand charges are totally avoided.
Weekly load leveling
Another strategy where TURBO harvesting ice makers are unequalled. All on-peak and off-peak hours weekdays and weekends are fully utilized to obtain 168 hours of compressor operation per week. Although not totally eliminating demand charges, this option often yields a very attractive return on investment.
1.Figure 1-Load Profile
2.Figure 2-Load Profile
3.Figure 3-Load Profile
4.Figure 4-Load Profile
EQUIPTMENT
The ice making equipment shall be a completely factory assembled unit of the harvesting type provided by TURBO REFRIGERATING COMPANY. The equipment shall have the following features:
Evaporater sections
The evaporater section shall utilize vertical evaporater plates made of 304 stainless steel.
Water distribution
The equipment shall have a stainless water distribution pan and be provided with all water distribution piping.
Frames
The frames (HP) shall be fully welded and hot dip galvanized after fabrication.
The frames(IGC) shall be fully welded and coated with a rust preventative primer and water proof finish.
Cabinets
The cabinets shall be insulated with 2" of foam urethane and suitable for outdoor application. The outer panels shall be protected with an approved exterior finish.
Compressor
The compressor shall be of the open(semi-hermetic) reciprocating type complete with motor and starter, or screw compressor with motor or starter.
Condensers
The condenser shall be of the evaporative type,(water cooled),(air cooled).
Refrigerant piping
The refrigerant piping shall utilize direct expansion valves, hot gas harvesting valves and a suction line accumulator with integral liquid suction interchanger, receiver designed to hold entire refrigerant charge. All vessels shall be constructed in accordance with the ASME Pressure Vessel Code.
Controls
Controls shall be electric or electronic and include all ice harvesting controls, water level controls, and refrigeration controls.
TESTING
All system components are operationally checked before shipping. Full factory run tests are available upon request.
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