DH Industries Francesco Dioguardi

March 1, 2016

Our brands

Stirling Cryogenics: Several types of Cryogenerators to produce on site cooling power

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CryoZone:

Several types of pumps and circulators for cryogenic gases and

liquids.

Cryo generators

StirLIN

StirLNG

StirLOX

StirLAIR

Tailor made cooling systems

Custom design cooling

solution

Heat exchangers

CryoPump

CryoFan

Brands & Product portfolio

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Bio Storage

Healthcare

LNG & Bio gas

High Temperature Superconductivity

Research & University

Maritime

Space & Observatory

Nuclear Food & Beverage

Markets

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StirLNG (Re-) Liquefaction of methane gas

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StirLNG

ON-SITE LNG PRODUCTION

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StirLNG-1

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StirLNG-4

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StirLNG

(RE-) LIQUEFACTION OF METHANE GAS

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Three distinctive LNG markets

Creation of LNG: Production of LNG from a gas source, mostly bio-methane but also

pipeline or stranded gas.

Conditioning of LNG in the supply chain:

Keeping the LNG condition at required temperature and pressure by compensating thermal heat losses On-land storage tanks

Maritime fuel and cargo tanks

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Easy process integration

Stirling Cryogenerators Internal cold generation by He gas:

methane is not part of process

Simple integration: at the LNG process side the Stirling Cryogenerator is only a heat-exchanger.

Small enough & efficient to fit biogas size liquefaction

Capacity range 0.25 to > 10 ton/day.

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Easy process integration

Heat exchange to liquefaction process

gas in

liquid out

Nordic Biogas Conference

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THE STIRLING CYCLE

to create cryogenic cooling power

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Stirling Cryogenerator interior

August 28, 2014 Nordic Biogas Conference

Stirling thermodynamic cycle

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Stirling thermodynamic cycle

Regenerator

Step 1: Compression Helium gas is compressed Gas temperature rises

Step 2: Cooling Compression heat is removed; The helium gas is pre-cooled in the regenerator before expansion starts

Step 3: Expansion By expansion, energy is extracted from the gas and thereby the temperature goes down thus cooling the cold head

Step 4: Displacement Gas is displaced back to the compression space; the cold from the helium gas is stored in the regenerator during displacement to step 1

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PRODUCTION OF LNG FROM (BIO)METHANE GAS

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Methane gas specifications The methane gas to be fed to the cryogenerators

shall be of a quality that prevents clogging of the heat-exchanger Main stream CH4

CxHy (C2 to C4) < 10%

CxHy (C5+) < 1 ppm

CO2 < 50 ppm*

H2O < -70ºC dew point

H2S < 3,3 ppm

Oil content < 0,01 mg/m3

Particles < 0,1 micron

N2/O2 < 10%, (non-condensable to be vented)

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Liquefaction directly into main storage vessel

Purified gas is fed to the cryogenerator

Gas is liquefied and fed to main storage vessel

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Purified gas is fed to the cryogenerator

Gas is liquefied into transfer vessel

Periodic transfer to main storage vessel

Liquefaction through transfer vessel

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Liquefaction of feed gas @300K

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CONDITIONING OF LNG

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Re-liquefaction of boil-off gas directly into storage vessel

Cold boil-off gas is fed to the cryogenerator

Gas is re-liquefied and fed back to main storage vessel

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Re-liquefaction of boil-off gas through transfer vessel

Cold boil-off gas is fed to the cryogenerator

Gas is re-liquefied into transfer vessel

Periodic transfer to main storage vessel,

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Re-liquefaction of cold feed gas

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StirLNG

(RE-) LIQUEFACTION OF METHANE GAS BY COOLING OF LIQUID

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(Re-)liquefaction by LNG liquid cooling

Using the existing pump of an LNG fueling station, LNG from the tank is circulated through the cryogenerator

The liquid is cooled, reducing its temperature

The liquid is fed back to the tank, spraying it at the top.

The cold liquid will condense gas, reducing pressure of the tank.

At the same time the liquid content is cooled, absorbing heat penetrating the tank insulation

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(Re-)liquefaction by LNG liquid cooling

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StirLNG

MARITIME USAGE

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Adaptation for Maritime usage

Corrosion prevention for maritime circumstances

Oil system and liquid outlets adapted for 22,5o dynamic roll and pitch, refer to videos Pitch

Roll

Static tilting up to 15o

For USCG: separation of Cryogenerator and motor by bulk head with rotating seal

ABS Certified, other notified bodies upon request

MVI_1140 22.5 graden dynamisch 0.0666Hz.MOVMVI_1232 22.5 graden dynamisch op 0.06 Hz.MOV

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Adaptation for Maritime usage

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On board installation of StirLNG system

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StirLNG-16

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StirLNG-16

For production of 2 - 6 TPD LNG or re-liquefaction of 4 - 10 TPD of BOG

4x StirLNG-4 combined on one skid, inclusive intermediate vessel and transfer system

Plug and play design: all equipment pre-installed

Fully automatic operation

Compact design, fits 20’ container

Each StirLNG-4 can work independently

For -5°C to 45oC operation, optional to -20°C

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StirLNG-16

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StirLNG-16

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StirLNG-16