OXYGEN CONSUMPTION REQUIRED FOR SUB OPERATING UNDER AIP

1. INTRODUCTION

Fuels for AIP systems.
Closed Cycle Diesel AIP (CCD) systems use marine diesel fuel stored in conventional
fuel tanks. AIP Stirling systems use fuel Laknafta EXXSOLTM D60. AIP Fuel Cells use hydrogen produced from metal‐hydrides that are stored in special vessels placed between light and pressure hull (in boats Type 212A/214) or hydrogen produced by reforming of hydrocarbon fuels stored in conventional tanks as well. Closed Cycle Steam Turbine (CCST) AIP “MESMA” use ethanol as a fuel that is stored in special tanks.

Liquid oxygen (LOX) for AIP systems
Liquid oxygen (LOX) oxidant is stored in insulated, double‐walled cryogenic storage tanks located inside or outside the sub pressure hull. LOX capacity would be the limiting factor in submerged endurance of all types of AIP plants. Existing AIP submarines carry in tanks about 20 – 35 tons of LOX. Both external and internal LOX tanks have complicated design so far as they were designed for shock resistance and to minimize thermal losses. LOX tanks located inside sub take considerable volume of pressure hull.
The second problem is fueling. Fueling of submarine by LOX can be realized in ports that fitted with special equipment or by LOX‐tankers that has to be organize previously.

A specific oxygen consumption, oxygen mass flow rate and thermal efficiency of different AIP types are considered in this chapter.
Existing information regarding to oxygen consumption for different AIP types was analyzed. It should be noted in this connection that some data used in different papers are not confirmed to our calculations.

The following four, well known, AIP types were analyzed: ‐ Fuel cell AIP system;

  • Closed cycle diesel AIP system;
  • Stirling closed cycle AIP system;
  • Closed cycle steam turbine AIP system

Detail calculations allow to evaluate oxygen management of different AIP options. Analysis of calculation results gives possibility to select type of AIP the most suitable for combined operation with dissolved oxygen extraction system.

Table of Content
Chapters Slide Number
1. INTRODUCTION 4
2. FUEL ENERGY CONVERTERS OF SUBMARINE’S AIP SYSTEM 8
2.1 PROTON EXCHANGE MEMBRANE FUEL CELL 13
2.2. DIESEL ENGINE-GENERATOR 31
2.2.1. MTU MARINE DIESEL ENGINE-GENERATORS 33
2.2.2. CATERPILLER MARINE DIESEL ENGINE-GENERATORS 43
2.3. STIRLING ENGINE-GENERATOR “V4-275R” 62
2.4. CLOSED CYCLE STEAM TURBINE “MESMA” 86
3. AIP EXCESS OF POWER 96
4. REQUIRED OXYGEN CONSUMPTION FOR AIP OPERATION 102
5. REFERENCES 106

 

  • Title – REQUIRED OXYGEN CONSUMPTION FOR SUBS OPERATING UNDER AIP
  • Classification – UNCLASSIFIED Author – Bakst A.
  • Issue Data – 2016-08
  • Updated – 2016-10
  • Pages (Slides) – 115 (including Cover and References);
  • Cover – 2 slides;
  • Tables – 32;
  • Figures (pictures, graphs) – 55;
  • References – 35;
  • Format – Adobe PDF
  • Size – 4.3MB
  • Price – 100USD

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