freeze and thaw system

8/12/2019 Freeze and Thaw System

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FREEZE AND THAW

SYSTEMPresented by: Nithin Varghese Ninan



Features of Modular FT100

• The modular FT100 system controls freezing and

thawing processes.

• This robust and reliable platform gives flexibility by

processing upto 100L of solution in Single use Celsius

Paks(Available sizes are 1L,2L,8.3L,16.6L Celsius Paks)

• The system is equipped with

– a freeze thaw module for Celcius Paks holding

– a Thermal Control Unit(TCU)

– a control panel with process relevant sensors



How FT100 works?

The heat transfer fluid(HTF) circulates inside heat

transfer plates mounted on each module.

Once a freeze or thaw cycle is initiated , the plates

close over the Celsius Paks ensuring good contact

between the plates and the Celsius Pak surfaceoptimizing the heat transfer.

The FT100 is mounted on rockers that allow the

module to rock back and forward during thawing

processes. The rocking movement optimizes the

mixing of the liquid and solid phases of the product,improving thawing time and product homogeneity.



FT100 Controller

The entire automatic freeze, thaw and hold operations are

processed through the controller. It is linked with TCU and FT

module via Profinet . The critical parameters of all processes are

commanded, monitored and stored in an automatic manner with

minimum operator intervention.

The Human Machine Interface(HMI) is a touch screen panel PC

connected to a Siemens PLC. All relevant process values are

recorded with the WinCC Software:

• HTF Flow

• HTF Supply and return temperatures

•HTF Supply and return Pressures

• Product temperatures(2 or 4 sensors for each module)



Communication and Networks



Schematic diagram of Huber Unistat

Chiller Unit



Unistat LED diagram



Operating States

• STANDBY: [LED2](if jacket temperature control is selected)

or [LED1](if process temperature control is selected) illuminate

• CIRCULATION ACTIVE: [LED3],[LED4],[LED5],[LED6]

illuminate

•

COOLING ACTIVE: [LED8] & [LED9] illuminates. Only inconjunction with CIRCULATION ACTIVE operating state

• HT COOLING ACTIVE:[LED8] & [LED9] illuminates. Only

in conjunction with CIRCULATION ACTIVE operating state.

Only temperature control units with HT cooling.

• HEATING ACTIVE: [LED7] illuminates. Only in conjunction

with CIRCULATION ACTIVE operating state



Temperature Control Unit

• An electronically controlled expansion valve is used in the

Temperature control unit to optimize the power adjustment. The

expansion valve always provisions the maximum possible

cooling capacity within the permissible ambient temperature

range. The TCU switches off when the upper range is

reached(maximum permissible ambient temperature).

• Temperature sensors employed on the surface of heating coils

monitors over temperature at this potential ignition source, thus

ensuring that the controller regulates the heating coil

temperature below the critical temperature (combustion point of

the heating fluid).

• Expansion vessel usually maintains expansion temperature of

thermal fluids in expansion vessel at almost room temperature.



Fill Levels in the Inspection window



Hardware Configuration



Default Blocks added in s7 program

• FB201: EM_UNISTAT

• FB318: CALL UNISTAT

• FB319: CALL FT100

• DB418: DB UNISTAT• DB419: FT100

• UDT418: UDT UNISTAT

• UDT419: UDT FT100



SCADA SCREENS- Temperature sensors



SCADA SCREENS- Proximity sensors



SCADA SCREENS- Enable FT100



SCADA SCREENS- CM_UNISTAT



SCADA SCREENS- PHASES



SCADA SCREENS- TEMP PP



SCADA SCREENS- TEMP CP



SCADA SCREENS- RECIPE



THANK YOU

QUESTIONS?

freeze and thaw system

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