CRYOGENIC COOLERS

YOUR PARTNER IN CRYOGENICS

Le-Tehnika d.o.o.Šuceva 27

SI - 4000 KranjSlovenia, Europe

Tel.: +386 4 20 20 200Fax: +386 4 204 21 22 www.le-tehnika.com

CRYOGENIC COOLERS

Le-tehnika – basic data

- Established in 1989- 3 main divisions:

– Telephony since 1989– Hydraulics&Pneumatics since 1995– Cryogenics since 2000

- A doughter company Sinoslo Technology (SIP) Ltd. established in year 2003 in China

CRYOGENIC COOLERS

WORLDWIDE LOCATIONS

Le-tehnika d.o.o. Kranj

Slovenia

Headquarters, production, distribution,

92 employee,2 retail shops

Le-tehnika d.o.o.Croatia

Distribution, 3 employees

Syndeo, d.o.o. Bosnia

Distribution, 1 employees

Sinoslo Technology (SIP) Ltd.

Suzhou, China

Production, distribution, 90 employees

CRYOGENIC COOLERS

ORGANISATION

CRYOGENIC COOLERS

Organization – Main divisions

Telefony

Cryogenics

Hidraulics & Pneumatics

CRYOGENIC COOLERS

ISO in Le-tehnika – accomplished STANDARDS

• Standards- ISO 9001:2008- ISO 14001:2004

(environmental)

CRYOGENIC COOLERS

0

1.000.000

2.000.000

3.000.000

4.000.000

5.000.000

6.000.000

7.000.000

2002 2003 2004 2005 2006 2007 2008 2009 2010

Turnover By Division (€)

Telephony Hydraulics Cryogenics Distribution

CRYOGENIC COOLERS

CRYOGENIC PROGRAM

Specific advantages of Le-tehnika:

Le-tehnika is specialized in development and production of cryogenic coolers systems of different configurations and performances and its accessories. They are generally intended for IR detector’s cooling used in IR cameras or missiles with an IR head for defense industry, police, security and in other applications.

- Flexible production (quick delivery of samples or small quantities)

- R&D team (customized solutions for each customer)

- Competitive prices- Quality

CRYOGENIC COOLERS

CRYOGENIC DEPARTMENT’S EQUIPMENT

• High purity air, N2 and Argon installation with pressures up to 700 bar

•Climatic Chambers for environmental testing

• Measuring stands for JT coolers performance measurements

• Clean room class ISO7

• Filling stations for Stirling cycle devices

• Sarix EDM machine for production of small parts

• Multiple turning machinesHYDRAULIC DEPARTMENT has its own workshop, which we are using for production of bigger parts.

CRYOGENIC COOLERS

Some fractals from our productioon

Clean room class ISO7Stirling Coolers assemby

Assembly working stand for JT coolers

Nozzle drilling and other preccision milling operations

Cleaning and purging room

CRYOGENIC COOLERS

JOULE THOMSON MINICOOLERSCapabilities:- Design and construction of coolers. - Heat exchangers calculation and manufacturing.- Different types of orifice designs, dimensioning and construction of orifice in

accordance with required cooler consumption.- Technology of bellow type self regulating mechanism.- Technology of other types of self regulating mechanism (bimetal,etc.).- Technology of Active Controlled type JT cooler.- Technology of Dual flow JT coolers- Production of JT coolers.- Testing and measuring of JT cooler performances for pressures up to 700bar at

different ambient temperatures- Typical outer diameters: 5.18mm, 7.22mm, 10.3mm, 11.17mm- Design proving, qualification testing etc.

CRYOGENIC COOLERS

JOULE THOMSON MINICOOLERSBY SHAPE

- Cylindrical

- Conical

- Combined (cylindrical, conical)

CRYOGENIC COOLERS

JOULE THOMSON MINICOOLERSBY TYPE OF CONSTRUCTION

* Fixed orifice

* Actively controlled (regulated)

* Fast cool down

* Self – regulated* Multilayer

CRYOGENIC COOLERS

CRYOGENIC COOLERS

JOULE THOMSON MINICOOLERSACTIVELY CONTROLLED COOLER - ACC

Advantages: - more reliable, - less influenced by gas impurities, - more stable operation, - operating temperature is not fixed with the gas used and could be set as needed.

Used for cooling of IR head on IRIS-T rocket.

CRYOGENIC COOLERS

ACCESSORIES- High pressure gas containers (bottles)- Quick release valves (TBD)- High pressure gas cleansers- Pure Air Monitors (PAM)- Test dewars

JOULE THOMSON MINICOOLERSACCESSORIES

CRYOGENIC COOLERS

CRYOCOOLERS BASED ON STIRLING CYCLECapabilities: - Design of Stirling coolers for different cooling power

requirements.- Regenerators calculation and manufacturing.- Production of Stirling coolers.- Testing and measuring of Stirling cooler performances.

Types of Stirling coolers:- Split Stirling cryocooler with rotary drive (0.5W at 80K of

cooling power)- Integral Stirling cryocooler with rotary drive (up to 3/4W of

cooling power)

CRYOGENIC COOLERS

- Cooling power around 500mW at 80K- Power consumption app. 35 W- Temp. range: -40°C to +70°C - Different forms and lengths of cold finger available on request

CRYOCOOLERS BASED ON STIRLING CYCLESPLIT WITH ROTARY DRIVE

CRYOGENIC COOLERS

CRYOCOOLERS BASED ON STIRLING CYCLEINTEGRAL WITH ROTARY DRIVE

Input Voltage: ……………………………………… 21-28 VDCTyp. Steady State Input Power ………….. ….. (200mW @80K @ 23°C): 8W Typ.Cooldown time to 80K (200J) ...................... < 5 minMaximum Input Power Required ................ 17 W (during cooldown )Operating Ambient Temperature Range .... - 40 C to + 71 CWeight ........................................................ < 470grMTBF ............................................................ > 10000h (Expected)

Cooling power for different cold end temperatures at 23 °C ambient

500

600

700

800

900

1000

1100

1200

70 80 90 100 110 120 130

Cold end temperature [K]

Cool

ing

pow

er [m

W]

CRYOGENIC COOLERS

DEVELOPMENT OF INTEGRAL STIRLING COOLER with ROTARY DRIVEROADMAP – generation 2

Target specifications:• Cooler Weight: <500 gr.• Input Voltage: 18-24 VDC• Max.Cooling power: > 500mW @80 K• Steady State Input Power (200mW @80K and 23°C): 8 W Typ.• Maximum Input Power: 17 W• Cooldown Time (200J @23°C): < 5 min Typ.• Ambient Temperature Range:

- Operational: -40°C...+71°C- Non-Operational: -56°C...+85°C

• Meets Environmental Conditions per MIL-STD-810D • MTTF > 5,000 Hours

Time frame

Jan.2011Design verifications with Environmental tests

April 2011Start of Life time testing

Jun 2011 Industrialization

CRYOGENIC COOLERS

DEVELOPMENT OF SMALL INTEGRAL STIRLING COOLER with ROTARY DRIVE

ROADMAP – generation 3Target specifications

• Cooler Weight: < 250 gr.• Input Voltage: 12VDC• Steady State Input Power

(150mW @110K @23°C): 3W Typ.• Maximum Input Power: 15W• Cooldown Time (150J @23°C):

5 Minutes Typ.• Ambient Temperature Range:

- Operational: -40°C...+71°C- Non-Operational: -56°C...+85°C

• Meets Environmental Conditions per MIL-STD-810D

• MTTF > 10,000 Hours

Time frame

Mar. 2011 Design development start (shape, materials, el. motors,…)

Aug. 2011 Models, preliminary tests

Dec. 2011 Design verifications with Environmental tests

Jun  2012 Industrialization

CRYOGENIC COOLERS

AVAILABLE TECHNOLOGIES & POTENTIAL TECHNOLOGIES

ON SHORT TERM SCALE

- PAM (PS or PR versions)Capacity: 10 units/month at the momentSamples available in 8 weeks

- Self regulated JT cryocoolers or actively controlled JT coolersCapacity: 80 -100 units per month. First samples available in few months.For special flange request some development time needed.

CRYOGENIC COOLERS

- Self regulated JT cryocoolers with special regulating demands.The development is needed and first samples available app. 6 months after start of the project.Production in agreement with customer.

- High pressure fast cooldown JT cryocoolers (special demands).- Quick release valves, depend on quantities.

- Split Stirling cryocooler 0.5WSerial production available in 2011

- Integral 0.5W Stirling cryocooler Serial production available in 2011.

- Linear stirling and Pulse tube closed cycle cooler.. Further development needed.

AVAILABLE TECHNOLOGIES & POTENTIAL TECHNOLOGIES

ON LONG TERM SCALE

CRYOGENIC COOLERS

More details about our

company and products on

www.le-tehnika.com

CRYOGENIC COOLERS

Thank you for your attention!

You are kindly invited to visit us in Slovenia!