Liquid Helium plant and Nitrogen plant

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Refrigeration and Cryogenics Laboratory has two central facilities.

  1. Liquid Nitrogen plant: Nitrogen is separated from compressed ambient air (consisting of 78% nitrogen) using adsorption desorption process. Subsequently, the nitrogen is condensed and stored as liquid in storage container under positive pressure.
  2. Liquid Helium Plant: Helium gas is liquefied in turbo expander based liquefier.

Make and Model

Liquid Nitrogen plant: 1 ~50LPH and newly installed ~100 LPH capacity

Nitrogen plant: Stirling Cryogenic Pvt. Ltd, Netherlands.

Model: StirLIN-4, StirLIN-8

Liquid Helium Plant :

Make:  Air Liquide Advanced Technologies, France.

Model: Helial SL

Specifications/Features

  • LN2 Plant – 50LPH (StirLIN-4)

    Chiller

    Cooling capacity

    48 kW

    Refrigerant                                                                                            

    R407C

    Suction/Discharge pressure

    4.2/14 barg

    Suction temperature

    11.7

                                                                                 

    Cryogenerator

    Cryogenerator power

    45 kW

    Production capacity

    50 lph

    Refrigeration capacity   

    4.4 kW@65K

    Working gas

    Helium

    Filling pressure

    22 barg@50Hz

    Liquid nitrogen purity

    >99%

     

    Air compressor

    Compressor type

    Screw

    Motor power                                                                                           

    25

    Max Working pressure

    12 barg

     

    LN2 Plant – 100LPH (StirLIN-8)
    Chiller

    Cooling capacity                                                                                   

    108 kW

    Refrigerant                                                                                            

    R410A

    Suction/Discharge pressure

    10/27 barg

    Suction temperature

    11.7

     

    Cryogenerator

    Cryogenerator power

    90 kW

    Production capacity

    100 lph

    Refrigeration capacity   

    8.8 kW@65K

    Working gas

    Helium

    Filling pressure

    22 barg@50Hz

    Liquid nitrogen purity

    >99%

     

    Air compressor

    Compressor type

    Screw

    Motor power                                                                                           

    45

    Max Working pressure

    12 barg

     

     


  •  

Application

  • Liquid Nitrogen Plant :

    The LN2 most commonly used for cryopreservation of cells and microbes. Also used in Liquid Helium plant for precooling, in NMR for prevent heat leak into LHe, High temperature superconductors etc.

     

    Liquid Helium Plant :

    The liquid helium produced can be used for cooling purposes down to 2 K for doing various experiments at low temperatures. Liquid helium can also be used for cooling superconducting magnets such as the ones used in NMR machines, MRI machines, etc.

Facility in-charge

Contact Email

prabhakaras[at] iitb[dot] ac[dot] in

Location

Refrigeration and Cryogenics Lab, N-4 bay,
Mechanical Engineering Department,
I.I.T. Bombay, Powai,
Mumbai - 400 076.
Phone Number    022-2159 3719

Contact Person:       Mr. Praveen Topagi
                                 Mr. Prabhakara S

Registration Link:

Submit New Request

Technical Specifications

LN2 Plant – 50LPH (StirLIN-4)

 

Chiller

 

Cooling capacity

48 kW

Refrigerant                                                                                            

R407C

Suction/Discharge pressure

4.2/14 barg

Suction temperature

11.7

                                                                             

Cryogenerator

Cryogenerator power

45 kW

Production capacity

50 lph

Refrigeration capacity   

4.4 kW@65K

Working gas

Helium

Filling pressure

22 barg@50Hz

Liquid nitrogen purity

>99%

 

Air compressor

Compressor type

Screw

Motor power                                                                                           

25

Max Working pressure

12 barg

 

LN2 Plant – 100LPH (StirLIN-8)

Chiller

Cooling capacity                                                                                   

108 kW

Refrigerant                                                                                            

R410A

Suction/Discharge pressure

10/27 barg

Suction temperature

11.7

 

Cryogenerator

Cryogenerator power

90 kW

Production capacity

100 lph

Refrigeration capacity   

8.8 kW@65K

Working gas

Helium

Filling pressure

22 barg@50Hz

Liquid nitrogen purity

>99%

 

Air compressor

Compressor type

Screw

Motor power                                                                                           

45

Max Working pressure

12 barg

 

Liquid Helium Plant :

Produces liquid helium from helium gas. Liquid helium can be used for cooling down to 2 K.

Caution

Users are instructed to bring their own containers and with some liquid helium in the container.

  1. Liquid Nitrogen Plant :

The Stirling Liquid Nitrogen plant (StirLIN-4) is used to produce liquid nitrogen. The nitrogen is separated from compressed ambient air (consisting of 78 % nitrogen) using adsorption desorption process. Subsequently, the nitrogen is condensed and stored as liquid in storage container under positive pressure.

    1. Main parts of helium plant 
      1. Air compressor
      2. Air vessel
      3. Dryer
      4. Pressure Swing Adsorption system
      5. Nitrogen Vessel
      6. Cryogenerator
      7. Dewar

 

  1. Liquid Helium Plant :

Liquefier (Cold Box)

The process gas (Helium) compressed and isentropic expansion in an open cycle via Turbo-Expanders until the Helium temperature falls below inversion temperature. Then isenthalpic expansion in Joule-Thomson device and helium gas is liquefied, stored in dewar at slightly above atmospheric pressure.

    1. Main parts of helium plant 
      1. Recirculation compressor
      2. Oil removal System
      3. Buffer Vessel
      4. Cold Box
      5. Dewar
      6. Recovery gas bag
      7. Recovery compressor
      8. Dryer
      9. Helium Storage Cylinders
Central facility presentation
Date Presentation File Presentation by (Prof.) Department
04-12-2017 View Presentation1.7 MB Prof. S L Bapat Mechanical Engineering
28-02-2019 View Presentation1.6 MB Prof. Milind D. Atrey Mechanical Engineering
03-11-2023
Instructions for Users

The users are requested to apply in IRCC central facility registration (https://drona.ircc.iitb.ac.in/NewFac/CentralFacilityIndex.jsp?facilityCode=ME007) either before coming to collect the liquid nitrogen or at the time of collection. Faculties, Students, Project staff can apply in this portal. As of now Institute staff are not allowed. For the students who are not able to apply, can ask their friends to lab mates to apply and choose the faculty of the students who required LN2. In the mean time they can mail software [at] ircc [dot] iitb [dot] ac [dot] in () their issue & get it rectified.