Construction:

• Stainless material

  • shells and structure made of stainless steel AISI 316

  • all connections are flanged joints and screw connections and are made of stainless steel AISI 316

• Modular design

  • Basic module - Height =1150 mm

    • connections for flow lines and return pipes

    • connections for more than one silo tank

    • access manhole for cleaning

    • foundation approx. 3,5 m x 3,5 m, 4 m x 4 m, and 4,5 m x 4,5 m

  • Accumulation module - Height =2080 mm

    • each module has a nominal capacity of 360 kWh, 730 kWh or 1170 kWh

    • the modules are constructed of stainless steel (AISI 316) with flanged joints that are screw connected (max. 8 modules)

    • glass inspection window (optional)

    • flanged joints for refrigeration media supply and return

    • Pipe coil

      • pipes made of polyethylene of high molecular density

        • temperature tested for the range between –20°C and +40°C

        • a minimum lifetime expectancy of 20 years

        • maximum operating pressure 6 bar

      • leakage test and maximum operating pressure test

        • by the manufacturer

        • visual, pneumatic and hydraulic check before and after assembly

        • after module manufacturing and before transportation

        • after installation of each module

  • Final module - Height = 1000 mm plus railing

    • impeller agitator

    • float valve for fresh water replenishment

    • overflow

    • service opening for agitator and float valve

  • Equipment and thermal insulation

    • ladder and railing

    • supply and inlet collector

    • thermal insulation made of expanded polyurethane or polystyrene

    • thermal insulation protected by aluminum or stainless steel sheeting

• Fully automatic control and regulation

  • The silos are delivered with a digital device for automatic control and regulation of ice thickness (range 0 - 48 mm) showing the thickness of ice per module at all stages of the operation.

  • The measuring device can be connected to a central computer system for process control which makes it possible to control the amount of energy accumulated.

  • The refrigeration plant can be regulated in such a manner that the compressors are operated at periods when the energy price is low or by setting the minimum required ice thickness in a step control of 5 mm.

Note: Specifications subject to change without notice.

 Within a few hours of compressor operation and ice building the influence of the pipe wall conductivity becomes negligible in relation to ice thickness. The diagram demonstrates the change of coefficient of heat transfer through pipes made of polyethylene and stainless steel depending on the ice thickness on the pipes. The pipes have identical geometrical features, they are submerged into water and through them the mixture of glycol and water is circulating.