TSU-M

1.0 ICE CHILLER Thermal Storage Unit

1.1 General: The ICE CHILLER® Thermal Storage Unit shall be Baltimore Aircoil Model TSU-______. Overall unit dimensions shall not exceed approximately _____ m by ____ m with an overall height not exceeding ____ m. The operating weight shall not exceed _______ kg

1.2 Thermal Capacity: Each unit shall have a latent kWh storage capacity of _______ kWh to be generated in ____ hours when supplied with _______ l/s of a 25% (by weight) solution of industrially inhibited ethylene/propylene glycol. The minimum glycol temperature required during the ice build operating mode shall be _______ °C. Rated system performance shall be provided in the format recommended by the Air-Conditioning & Refrigeration Institute (ARI) Guideline T. The thermal storage units shall be modular in design. Unit design shall allow units of different sizes to be installed in order to optimize unit selection and minimize space requirements. Tanks sizes can be mixed due to internal piping arrangements that create a balanced flow due to uniform pressure drop through the coil circuits.

2.0 Construction Details

2.1 Tank: The tank shall be constructed of heavy-gauge galvanized steel panels and include double brake flanges for structural strength. The tank walls shall be supplied with a minimum of 110 mm of insulation that provides a total insulating value of 3,1 m² °C/W. The tank design shall utilize two liners. The 1,5 mm E.P.D.M. liners shall be of single piece construction and be suitable for low temperature applications. Liners shall be separated from each other by 20 mm of extruded polystyrene insulation. The tank bottom shall be insulated with 70 mm extruded, polystyrene insulation.

2.2 Covers: The ICE CHILLER® Thermal Storage Unit shall be provided with watertight, sectional covers constructed of hot-dip galvanized steel. The covers shall be insulated with a minimum of 50 mm of extruded polystyrene insulation.

2.3 Heat Transfer Section: Contained within the tank shall be a steel heat exchanger that is constructed of 26,7 mm O.D., all prime surface serpentine steel tubing encased in a steel framework. The coil, which is hot-dip galvanized after fabrication, shall be tested at 1300 kPa air pressure under water and rated for 1000 kPa operating pressure. The coil circuits are configured to provide maximum storage capacity. Each unit shall be supplied with threaded connections.

2.4 Sight Tube: Each ICE CHILLER® Thermal Storage Unit shall be provided with a sight tube mounted on the end of each unit. . The sight tube, which shall be fabricated from clear plastic pipe, displays the tank water level and corresponding ice inventory. Optionally, the exclusive B.A.C. ICE LOGIC Ice Quantity Controller is available for both manual and automatic chiller control.

2.5 Heat Transfer Fluid System: The heat transfer fluid shall be an industrially inhibited, 25% by weight, ethylene glycol solution specifically designed for HVAC applications. The 25% (by weight) solution is designed to provide freeze/burst and corrosion protection as well as efficient heat transfer in water based, closed loop systems. Corrosion inhibitors shall be provided to keep pipes free of corrosion without fouling.

Need more information? Contact your local BAC representative.