BAC has successfully applied ice thermal storage technology to thousands of installations worldwide. BAC has the application and system experience to assist you in the design, installation and operation of your ice storage system. BAC has supplied ICE CHILLER® Thermal Storage Products for projects that range in size from 90 to 125,000 ton-hours (0.3 to 441.3 MWh). Installations include office buildings, hospitals, manufacturing processes, schools, universities, sports arenas, produce storage facilities, hotels and district cooling applications.

The ICE CHILLER® Product line includes a variety of factory-assembled units. For large applications, where space is limited or factory-assembled units are not cost effective, ICE CHILLER® Thermal Storage Coils are available for installation in field-erected tanks.

The BAC product offering provides system design flexibility. Ice can be built using various refrigerants or glycols on steel coils and is used to provide either chilled water or glycol to the cooling system. This flexibility, combined with a broad range of application experiences, allows BAC to provide a cost-effective product to meet your specific requirements.

Merchandise Mart
In 1986 the Merchandise Mart in Chicago, Illinois installed 26,400 ton-hours (93.2 MWh) of ICE CHILLER® Thermal Storage Coils in a retrofit of the building’s air-conditioning system. The Merchandise Mart was built in 1930. The increased air-conditioning load on the building from computers, other electrical equipment and increased people density made the old system too small. Ice thermal storage with the low temperature water available allowed the retrofit of the air-conditioning system to go ahead without replacing piping and ductwork. Increasing the temperature ranges on the piping and air distribution system allowed the Merchandise Mart to install an ice thermal storage system at a lower first cost than a conventional system.

Friendship Annex 3 Office Building
The HVAC renovation of Friendship Annex (FANX) 2 and 3 in Baltimore, MD received the “1994 Outstanding Engineering Achievement of the Year Award” from the Engineering Society of Baltimore. Ice with low temperature air distribution cools these buildings renovated in 1994. To meet federal guidelines, a comprehensive study of five alternate systems was made using life cycle costing. The analysis showed ice storage with low temperature chilled water and low temperature air to be the most economical system. A total of 15,230 ton hours (53.8 MWh) of ICE CHILLER® Thermal Storage Units were installed for the two buildings.

Taipei 101
Taipei 101 is located in the central government and business district of Taipei, Taiwan. The building consists of a podium shopping and entertainment complex and office tower. Completed in August 2002, the 101-floor office tower is the world’s tallest building at 508 meters. BAC ice storage equipment (36,450 ton-hours) was selected because of its ability to provide low fluid temperatures, in this case 36ºF (2°C). Low supply temperatures allowed economical selection of pressure isolation heat exchangers on the 42nd and 74th floors. Additionally, the low supply temperature allowed cold air distribution to be used throughout, thus reducing first costs and operating costs while providing improved occupant comfort.

IMUX Beijing District Cooling
IMUX Beijing District Cooling’s first central cooling plant is located in Beijing’s West Zone Zhongguancun Science and Technology Park, China’s largest science park focused on developing high-tech enterprises. The plant, largely located underground, incorporates 29,800 ton-hours of BAC ice storage coils in a system which effectively uses less expensive nighttime power (75% less expensive than daytime power). Chilled water is supplied at 34ºF (1°C) to a campus-style chilled water distribution loop. Many of the buildings served employ cold air distribution systems to achieve even lower construction and operating costs.

Johns Hopkins Applied Physics Lab
In 1986, the Johns Hopkins University Applied Physics Lab in Laurel, MD installed 5,600 ton hours (19.8 MWh) of ICE CHILLER® Thermal Storage Coils to cool the new Steven Mueller Building which houses offices, labs and clean rooms. In 1988 another 2800 ton hours (9.9 MWh) of ICE CHILLER® Thermal Storage Coils were added to cool adjacent office and lab buildings. The ice thermal storage allows the Applied Physics Lab to save over $150,000 per year on their electric bill.

Low Temperature Air

Omni Interlocken Resort Hotel
The Omni Interlocken Resort Hotel just outside of Denver, CO was designed with a low temperature air and water system using ICE CHILLER® Thermal storage Units. The challenge was to design a high-quality HVAC system sensitive to building aesthetics, which would provide good guest comfort, low operating/maintenance costs and could be constructed within a tight construction budget. The first conceptual design was a four-pipe fan-coil system for the hotel rooms with air-cooled chillers and rooftop air-handler units for the public spaces. The final design was a low temperature air system with Modular ICE CHILLER® Thermal Storage Units. This low temperature air system was $500,000 less than the original conceptual design. In addition the hotel’s energy bills are $100,000 less than with a conventional system.

Villa Julie College
Modular ICE CHILLER® Thermal Storage Units were part of an expansion that doubled the size of this private college in Baltimore, MD. The new facilities added 135,700 ft2 (12,620 m2) of space to the campus and include a 400-seat auditorium and theater, gymnasium with showers and locker rooms, student center, video center, academic and computer classrooms, kitchen and administrative offices. The architect designed the new buildings with the intention that the structure be part of the visual space. This reduced the space allotted for the mechanical equipment. The engineer designed a low temperature air system that delivers 45°F (7°C) air temperature to VAV series fan powered boxes. The use of smaller piping and ductwork made it possible to avoid architectural changes that would affect the aesthetics of the design.

Food Processing

Zippy’s Restaurant Central Facility
At Zippy’s in Honolulu, HI, food is cooked in a central kitchen where it is cooled and packaged for use in local Zippy’s restaurants. The FDA requires that the food in the cooking vessels be cooled to 45°F (7°C) in less than one hour to prevent contamination. The cooking vessels in the kitchen need varying amounts of cooling depending on the dish that is being prepared, and when it finishes its cooking cycle. Because of the varying cooling load from day to day and hour to hour and the need for a quick cool down period, standard chillers are not a good match for this application. Ice thermal storage with its variable capacity and low supply temperature is an excellent match for this process cooling application.

Power Generation

Wolverine Power
Wolverine Power, located in central Michigan, is a generation and transmission electric cooperative. For a new generating plant with (2) 22-megawatt Rolls Royce turbines, Wolverine Power elected to use ice storage for their turbine inlet air cooling. They installed 7,610 ton hours (26.9 MW) of ICE CHILLER® Thermal Storage Units to generate 40°F (4.4°C) chilled water, which provides 55°F (13°C) inlet air. The generating plant’s ice storage capacity can be used over a 16-hour period as partial storage or over a 4-hour period as full storage, depending on the value of power on the open market. During peak summer time, the increased power capacity is worth up to $3,500 per hour in electricity sales.

Emergency Cooling

Verizon
Verizon, the provider of telephone service to a large portion of the east coast, uses an ICE CHILLER® Thermal Storage Unit to provide back-up cooling to one of their computer centers in Silver Spring, MD. If the chiller that provides cooling goes down for any reason, power outage or alarm, the system immediately switches over to the ice thermal storage system for cooling. The pump on the ice thermal storage system is on the continuous power back up with the computers. There is enough ice to provide cooling for 30 minutes. This gives Verizon enough time to clear the alarm or get the back-up generator running and the chiller back on line.