Sterilohm

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    Ohmic heating units or the ood, dairy and beverage industries

    SterilOhm

    Application

    The SterilOhm heating units rom Ala Laval Astepo are based

    on a unique technology that uses an electric current to ensurerapid uniorm heating o pumpable ood and beverages. Ohmic

    heating technology is especially useul in conjunction with the

    pasteurization or sterilization o products containing large parti-

    cles in cases where it is essential that the nal product retains its

    nutritious values, vitamin content and taste.

    SterilOhm heating units are widely used in processing o a

    wide variety o ruits and vegetables, prepared oods, cheese,

    liquid eggs, ready-to-eat dishes, sauces, juices, etc.

    Design

    The SterilOhm unit has a power capacity o 60 kW ((80

    HP) and can be combined in series with up to 5 units or

    heating inputs in greater volumes. Each SterilOhm unit

    consist o a transormer, annular electrodes and sotware

    that automatically adjusts voltages to match dierent product

    conductivities. The pipework consist o lengths o insulated

    Pyrex or Tefon pipe with an uniorm diameter o 1-4 inches

    (25,4-101,6 mm) which ensures an unobstructed product

    throughfow. Depending on product viscosity and the size o

    any particles present in the product being heated, SterilOhm

    units are available or mounting either horizontally or vertically.

    In order to secure the requested heat treatment, the outlet

    temperature is sel-regulated once set. SterilOhm units can

    be delivered as complete integrated system in a processing

    line with pumps aseptic cooling sections, automation control

    systems, aseptic tanks, etc. to comply with individual

    customer specications.

    Working principle

    The pumpable ood product is lead into the insulated pipe

    where it is heated up to the required temperature via two

    electrodes (+ and -) that transer the electrical current to

    the product. Due to the electrical resistance o the product

    and the resultant Joule eect, the electricity heats up all the

    product being held inside the pipe, at the same time. This

    means the heating eect is uniormly distributed throughout

    all the material within the length o pipe, regardless o the

    specications and characteristics o the product.

    The benets o SterilOhm heating units include:

    Heatingtheentirevolumeoftheproductatthesametime

    ensures that the the carrier liquid and any particles are heated

    at the same rate, thus preventing any over- or undercooking

    Therapidheatingandlowpressureensurestheintegrityof

    any particles within the product

    Thegentlenessoftheheatingprocessthatmakessurethe

    end-product retains its nutritious values, vitamins, colour

    and taste

    Accurate,rapid-reactingtemperaturecontrol

    Noneedforlonglengthsofpipingandhigh-pressurepumps

    reducing the cost and complexity o heating installations

    Easycleaninginbetweenstart-ups.

    Complete processing line with SterilOhm heating unit, automated control unit, pumps, aseptic cooling section and tanks.

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    PFT00411EN1108

    How contact Ala Laval

    Up-to-date Ala Laval contact

    details or all countries are

    always available on our website

    at www.alalaval.com.

    Ala Laval reserves the right to change specications without prior notication.

    Note:TheowratedependsonDeltaT.AlfaLavalAstepocanprovidespecicestimates/capacitymodulesonrequestbasedoneachclientsdataforproductdetails, needed capacities required, etc.

    Balance

    tank

    SIP cooler

    + - +

    + - +

    Holding

    Heating

    Ohmic heaterPump

    Cooling media

    Cooling media

    Treated product out

    Cooling

    Cold

    water

    Cooling media

    Product in

    Specications

    Schematic fow diagram or an Ohmic heating installation

    120 kW SterilOhm unit in horizontal conguration or use with products containing

    particulates.

    30 kW SterilOhm pilot unit in vertical conguration or use with

    viscous products. As an option vertical units can also be supplied

    with a Swep surace system (patent pending) or products where

    ouling can be a problem.

    SterilOhm Ohmic pilot SterilOhm 1 SterilOhm 2 SterilOhm 3 SterilOhm 4 SterilOhm 5

    Power capacity 30 kW (40 HP) 60 kW (80 HP) 120 kW (160 HP) 180 kW (240 HP) 240 kW (320 HP) 300 kW (400 HP)

    Power supply 400V 50Hz 400V 50Hz 400V 50Hz 400V 50Hz 400V 50Hz 400V 50Hz

    Output 20 KHz 20 KHz 20 KHz 20 KHz 20 KHz 20 KHz