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    One Atmosphere Boiler - Electric Superheated Steam Generator

    OAB Steam Generator - High Velocity Superheated Steam Generator

    MHI's One Atmosphere Boiler superheated steam boiler features patented InstaSteam™ technology, allowing for rapid startup times, unparalleled efficiencies and up to 1300°C temperatures. BoilerFree™ technology allows most OAB units to be installed without the need for traditional boiler certifications. The OAB is ideal for use as an industrial steam generator, for dewrinkling operations, superheated steam drying and dozens of other specific applications requiring a high efficiency boiler that does not require boiler certifications.

    Pure Steam. Clean Steam. One Atmosphere Boilers generate superheated steam that is free of contaminants. The OAB's steam is ideal for pharmaceutical, cosmetics and other industries requiring the highest quality steam. OAB steam is also suitable for use as utility steam in many applications due to its high energy content.

    Highly Scalable. OAB units can produce from 1kg/hr to over 1000kg/hr. Modular design allows for easy upgrades and utilizing the unit where it is needed, all without routing steam or venting pipes.

    Efficient. Boiler efficiencies improve when operated at lower pressures. Better conversion factors allow OAB units to use less resources to produce more steam. The OAB's rapid start-up results in less energy used getting up to temperature. Lower operating costs, less downtime and higher productivity.

    Need flow at a higher pressure?  Unique Nanostructured isenthalpic pressure enhancers from MHI.

    Steam FAQs
    What controls the productivity?
    How do Temperature and Pressure impact a steam reaction?

    OAB Compared to Traditional Boilers

    How Big is the One Atmosphere Boiler

    Request OAB Quote

    Steam Generator Comparisons

    Steam Generator Comparisons



    Feature One Atmosphere Boiler Water Tube Steam Boilers Electric High Pressure Steam Boilers
    Maximum Steam Temperature1 300-1300°C Standard 600°C with Economizer and Superheater 134°C for 3 bar steam
    Efficiency ~95% <90% ~85-95%
    Idle Energy Waste Low High Moderate
    Non Steam Producing Energy Usage Time
    (Start Up Time2) 
    Nearly Instant 60+ Minutes. Becomes slower with higher pressures and volume requirements ~60 Minutes. Becomes slower with higher pressures and volumes. (Not including cool down and pressure release for autoclaves)
    Suggested Inlet Temperature3 Tap 40-60°F 20-35°C
    Capital Cost per Kg of Steam3 Low High Moderate. Depends on temperature/pressure required.
    Operational Costs4 Low High Low-Moderate
    Unit Footprint Starting at 1'x1'x1' Large Depends on size and pressure requirements.
    Plug & Play Operations Yes No No
    Requires Boiler Certifications5 No Yes Yes
    Downtime6 Low Low-Moderate Low
    Utilizes Combustion7 (Requires Ventilation) No Yes No
    Energy Needed to produce 100 Kg/hr steam from cold start ~100 kWh ~150-200 kWh Equivalent (Including start up time consumption) ~150kWh Equivalent (Including start up time consumption)
    Power Weight [Kg Equipment/(Kg/hr) of steam] for a 100kW Generator ~2 Kg per Kg/hr of steam ~5 Kg per Kg/hr of steam (Weight increases with temperature/pressure) -
    Maximum Work Potential (Based on second law limitation)  Base is 1 Bar 100C liquid water for all.

    672 kJ/Kg for 500°C superheated steam

    1973 kJ/Kg for 1300°C superheated steam

    755 kJ/Kg for 10 Bar saturated steam

    1169 kJ/Kg at 100 Bar saturated steam

    Generally not used for creating work.
    Enthalpy (heat) Content 3489 kJ/Kg for 500°C superheated steam at 1 Bar

    2777 kJ/Kg for 10 Bar saturated steam

    Saturation steam temperature 180°C

    2725 kJ/Kg for 3 Bar saturated steam

    Saturation steam temperature 311°C

    Running at Partial Capacity With MHI Electronic Controls, No loss of efficiency

    Significantly lower efficiencies, if model is capable

    Lower efficiencies

    Air Contamination Effects

    Extremely high operation temperatures diminish effects of air

    Air contamination harms output

    No air contamination is allowed (strict)

    Piping Losses Discrete, locatable units reduce necessary piping. Low, 1 atmosphere pipe pressure. High pipeline pressure combined with long piping distances leads to heat loss and dangerous conditions in the event of pipe failure. High pipeline pressure combined with long piping distances leads to heat loss and dangerous conditions in the event of pipe failure.
    How far can I run my pipe?  Infographic
    Request OAB Quote

    1Maximum Steam Temperature obtained from production models; includes the use of superheaters.
    2Time from a cold start to reach maximum operating temperature.
    3Capital Cost per Kg of Steam calculated by dividing device output by device cost. Similar magnitude output devices are used. Prices used in calculations are general estimates obtained from public sources.
    4Operational Cost per Kg of Steam calculated by dividing output by resources consumed, excluding water. Resources assume prices of $0.09/Kwh and $5/1000 cuft for Natural Gas.
    5Boilers using high pressure vessels require annual inspections and certification certificates especially when over 1 bar gauge. Pressure certificates, ASME and local government regulations however vary considerably and could change so please confirm with local authorities.  Please click here to review some of the codes posted on the web.  Steam generators that operate at One Atmosphere may not need certifications.
    6Most boilers require routine cleaning and inspections that impact uptime.
    7Combustion byproducts include NOx and other harmful gasses. Combustion restricts applications of many steam boilers.

    Traditional boilers yield saturated steam (Tsat and Psat are linked). Boiler efficiencies increase with lower pressures. At 10 Bar the saturation temperature is only 180°C.   This temperature can almost instantly be achieved with the OAB and other MHI steam generators at a safer 1 bar pressure.

     

    If the steam is for heating purposes, please compare the enthalpy.  If the steam is for work purposes please use the work potential row below, the work potential increases with both temperature and pressure.  Work potential is measured from 25°C base temperature.  The cost of boilers increases for very high pressure ratings.  However even at 100 Bars the  saturation temperature is only 311°C.  Again a fairly easy and routine temperature from the OAB.

    1 Bar =100000 Pa = 14.5 psi

    10 Bar =1000000 Pa =145 psi

    100 Bar = 107 Pa = 1450.3 psi




    Models

    One Atmosphere Boiler Standard Models

     

    The Kg/Hr is nominal steam production rate.

    550 Models expected to produce steam in the range of 500-700C

    750 Models expected to produce steam in the range of 700-900C

     

    Model

    Amount of Steam Produced

    (Range)

    Electrical Power

    Specify Steam Output Temperature

    How to Specify?

    OAB- Nomail Kg/hr of Steam- Nominal Temperature

    OAB-4 4-6Kg/hr Steam Single Phase Only 550°C, 750°C, 1300°C

    OAB-4-550

    OAB-4-750

    OAB-12 12Kg/hr Steam Configurable 550°C, 750°C, 1300°C

    OAB-12-550

    OAB-12-750

    OAB-36

    36Kg/hr Steam

    Configurable 300°C, 550°C, 750°C

    OAB-36-550

    OAB-36-750

    OAB-48 48Kg/hr Steam Configurable Contact MHI

    OAB-48-550

    OAB-48-750

    OAB-60 60Kg/hr Steam Configurable Contact MHI Contact MHI
    Custom - Higher Volumes Custom Custom Contact MHI Contact MHI

    Tankless OAB*

    TOAB-4-400

    4-6/Kg/hr Steam Single Phase Only
    400°C Contact MHI

    Tankless OAB*

    TOAB-12-400

    12Kg/hr Steam Single Phase Only 400°C Contact MHI
    Request OAB Quote

    * The TOAB-4-400 and TOAB-12-400 models feature clean steam output temperatures between 300C and about 400C. Ideal for attaching to testing and for Pharma or R&D applications. The output for the clean steam is a threaded fitting like the one shown below for a typical TOAB configuration. Sealant is provided for the user when attaching tubing for steam travel beyond the exit.  Vittori tubes which are insulated flexible tubing with connectors are also available from MHI.  Contact to request additional information.

    1.5 Threaded NPT Output Nozzle
    Typical 1.5" NPT Outlet Nozzle for TOAB

    A typical OAB Configuration

     

    All Control Systems Integrated: Easy to Install and Use

    Single Phase 220/240V (XPAN) or Three Phase  (TRIPAN) for Common World-wide Voltages

    Applications

    Applications


    One Atmosphere Boiler Suggested Applications
    Laboratory Steam Generator
    Pilot Plant Steam Generator for Possible Pharma Applications
    Steam Generator for Silicon Carbide Sintering On Demand Steam
    Electric Steam Generator Steam Bluing/Blackening
    High Pressure Steam Boiler Process Steam for oil and natural gas
    Ultra High Purity Steam Superheated Steam Generator
    Commercial Steam Boiler Pure Steam Generator
    Superheated Process Steam Electric Superheated Steam
    Steam Boiler Commercial Steam Generator
    Industrial Steam Generator Tankless Instant Steam Generator
    Endotoxin Free Steam Industrial Steam Boiler
    Laboratory Superheated Steam Low Pressure Steam Boilers
    Electric Superheated Steam Generator High Pressure Steam Boilers
    High Temperature Steam Low Pressure Steam
    Low Pressure Steam Boiler Steam Generator Boiler
    Steam Roasting Electric Steam Boiler
    Electric Steam Superheater Steam Boilers
    Steam Reforming Hydrogen Wine barrel conditioning and reconditioning.   See also hybrid.
    Wood Conditioning for utility, packaging and hobby Superheated Steam Drying
    Instant Steam Generator Superheated Steam Boiler



    Request OAB Information


    Compare the OAB to:
    Fire Tube Boilers Water Tube Boiler
    Industrial Boiler Gas Steam Boiler


    Traditional boilers yield saturated steam (Tsat and Psat are linked). Boiler efficiencies increase with lower pressures. At 10 Bar the saturation temperature is only 180°C.   This temperature can almost instantly be achieved with the OAB and other MHI steam generators at a safer 1 bar pressure.

     

    If the steam is for heating purposes, please compare the enthalpy.  If the steam is for work purposes please use the work potential row below, the work potential increases with both temperature and pressure.  Work potential is measured from 25°C base temperature.  The cost of boilers increases for very high pressure ratings.  However even at 100 Bars the  saturation temperature is only 311°C.  Again a fairly easy and routine temperature from the OAB.

    1 Bar =100000 Pa = 14.5 psi

    10 Bar =1000000 Pa =145 psi

    100 Bar = 107 Pa = 1450.3 psi



    Media Gallery

    Steam-jet cleaning of glassware such as glass-vials with 550°C superheated high quality steam

    MHI-INC One Atmosphere Boiler


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