Submarine Atmosphere Control

Men living and working on board a submarine degrade the quality of the atmosphere.

  • Respiration consumes oxygen and produces carbon dioxide.
  • Charging batteries generates hydrogen.
  • Running machinery produces carbon monoxide, hydrocarbons and fumes.
  • Refrigerant systems leak refrigerant gas.
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Oxygen Generation

The low pressure electrolyser produces oxygen at ambient pressure by the process of electrolysis of water.

The hydrogen by-product is produced simultaneously at pressures up to 7 bar.

This mode of operation is made possible by the use of a solid polymer electrolyte instead of a traditional potassium hydroxide solution. Higher hydrogen discharge pressures are achieved via a compressor

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Gas Management

The Gas Management Plant reacts waste hydrogen from the low pressure electrolyser with carbon dioxide from the MPT Carbon Dioxide Scrubber to produce an aqueous solution. This can be either stored or discharged overboard

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MPT Carbon Dioxide Scrubber

The MPT Carbon Dioxide Scrubber uses a regenerable chemical absorbent to remove carbon dioxide continuously from submarine's atmosphere. Boiling and stripping the carbon dioxide from the solution regenerates the capacity of the absorbent. The high purity carbon dioxide is either compressed and discharged overboard or passed to a gas management plant for further processing.

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Air Purification Unit

The Air Purification Unit removes carbon dioxide from a submarine's atmosphere by absorbing it into a chemical absorbent. Operation is similar to that of the MPT Carbon Dioxide Scrubber. Low energy requirements make it suitable for installation in diesel-electric submarines and those fitted with AIP systems

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Carbon Monoxide and Hydrogen Eliminator

The Carbon Monoxide and Hydrogen Eliminator converts carbon monoxide and hydrogen to carbon dioxide and water vapour respectively by oxidising them over a special catalyst. Unlike other catalysts used for this purpose, the specially formulated grade used by TPG functions at ambient temperatures and in the presence of water vapour without being poisoned

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High Temperature Carbon Monoxide and Hydrogen Burner

The High Temperature Carbon Monoxide and Hydrogen Burner converts carbon monoxide and hydrogen to carbon dioxide and water vapour respectively by oxidising them over a Hopcalite catalyst at high temperature, typically +200 degrees centigrade. Special features incorporated within the unit make it suitable for applications where refrigerant gases may be present in the airflow

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Refrigerent Removal

The Refrigerant Removal Unit removes refrigerant gas from an airstream by decomposing it over a special catalyst. The acid products formed by decomposition of the refrigerant gas are cooled and absorbed into sodalime.