Where to Buy

CRTech products may be purchased either directly from C&R Technologies or through any of our Worldwide Resellers. Please contact us or a reseller for the current prices and volume pricing on SINDA/FLUINT, Thermal Desktop, RadCAD, FloCAD, TD Direct.

International Headquarters

C&R Technologies, Inc.  Click to request a quote

Location: Boulder, Colorado, USA
Phone: 303-971-0292
Fax: 303-971-0035
Email:

Worldwide Resellers

China

Beijing Hongying United Technology Ltd.
Room 1012, Bld 8, East Asia Shangbei Center,
Changping District, Beijing, China, 102208
Tel: 86-10-80751005
Fax: 86-10-80751005
Click to Email
Web site: www.hongyingtech.com

CnTech Co.,Ltd BeiJing
Room 503, Building A, Intelli-Center, No.18 Zhongguancun East Road,
Haidian District, Beijing, 100083, P.R.China
Phone: +86-10-82601646
Fax: +86-10-82600094
Click to Email
Web site: http://www.CnTech.com.cn

CnTech Co.,Ltd ShangHai
Address: Unit A,11th Floor,Bldg.2,Hua Yuan Mansion,No.3500, 
Kaixuan Road,Shanghai,200030 P.R.China
Phone: +86-21-64391516
Fax: +86-21-64391506
Click to Email
Web site:http://www.CnTech.com.cn

CnTech Co.,Ltd WuHan
Address: Room 2403, Suit A, East valley kenzo, No.727 Luoyu Road,
Hongshan Area, Wuhan, 430074 P.R.China
Phone: +86-27-59838973
Fax: +86-27-59838974
Click to Email
Web site: http://www.CnTech.com.cn

CnTech Co.,Ltd GuangZhou
Room 602,Bldg.1,Xintai Technology Buliding,No. 51-53,Jianzhong Road,
Tianhe Software Park,Guangzhou, 510665,P.R.China 
Phone: +86-20-61139353
Fax: +86-20-61139353
Click to Email
Web site: http://www.CnTech.com.cn

SimuCAD Ltd. Shanghai
Room 503, No. 555 West Nanjing Road, Jing'an District, Shanghai, China, 200041
Phone: +86-21-62157100
Fax: +86-21-62151794
Click to Email
Web site: www.simu-cad.com

Japan

PTI CO., LTD
WinAoyama942, 2-2-15 Minamiaoyama
Minato-ku, Tokyo 107-0062
Japan
Phone: +81-3-6403-3061

Click to Email
Web site: www.ptij.jp

Wave Front Co., Ltd.
Queen's Tower B12
2-3-3 Minatomirai Nishi-ku
Yokohama 220-6112
Japan
Tel :81-45-682-7070
Fax :81-45-682-7071
Click to Email
Web site: www.ablemax.co.kr

Taiwan

HyperINFO Corporation
9F., No.86, Singde Rd., Sanchong City, Taipei County 241, Taiwan
Tel: 886 2 85121686
Fax: 886 2 29958917
Click to Email
Web site: hyperinfo.com.tw

Korea

AbleMax, Inc.
6th Floor Samick Lavied'or building
234, Teheran-ro Gangnam-Ku, Seoul, Korea 
Contact: Jung Hyuk-Park
Tel :82-2-539-5212
Fax :82-2-539-5213
Click to Email
Web site: www.ablemax.co.kr

Europe

Joaquin Capablo
C/ Danzas 2, 3º A
50003 Zaragoza - Spain
Tel: +34 678293988
Click to Email

RexLab
Moosfeldstr. 10c
D - 85238 Petershausen
Germany
Contact: Ingrid Schneider
Tel: +49 0 8137 - 99 8289
Fax: +49 0 8137 - 99 8288
Click to Email
Web site: www.rexlab.de

New Zealand and Australia

Hearne Scientific Software Pty Ltd
Australia
Level 6, 552 Lonsdale Street
Melbourne 3000, Australia
Tel: +61 3 9602 5088
Fax: +61 3 9602 5050
Web site: www.hearne.com.au

New Zealand
Level 7, 44 Anzac Avenue
Auckland, New Zealand
Tel: 64 9 358 0350
Fax: +64 9 358 0325
Web site: www.hearne.com.au

FloCAD model of a loop heat pipe

Since a significant portion of LHPs consists of simple tubing, they are more flexible and easier to integrate into thermal structures than their traditional linear cousins: constant conductance and variable conductance heat pipes (CCHPs, VCHPs). LHPs are also less constrained by orientation and able to transport more power. LHPs have been used successfully in many applications, and have become a proven tool for spacecraft thermal control systems.

However, LHPs are not simple, neither in the details of their evaporator and compensation chamber (CC) structures nor in their surprising range of behaviors. Furthermore, there are uncertainties in their performance that must be treated with safety factors and bracketing methods for design verification.

Fortunately, some of the authors of CRTech fluid analysis tools also happened to have been involved in the early days of LHP technology development, so it is no accident that Thermal Desktop ("TD") and FloCAD have the unique capabilities necessary to model LHPs. Some features are useful at a system level analysis (including preliminary design), and others are necessary to achieve a detailed level of simulation (transients, off-design, condenser gradients).

CRTech is offering a four-part webinar series on LHPs and approaches to modeling them. Each webinar will last 60 minutes and are designed to be attended in the order they were presented. If you miss one in the series, please check out our video page for a recording, or contact us before the next webinar starts. While the first webinar presumes little knowledge of LHPs or their analysis, for the last three webinars you are presumed to have a basic knowledge TD/FloCAD two-phase modeling.

Part 1 provides an overview of LHP operation and unique characteristics
Part 2 introduces system-level modeling of LHPs using TD/FloCAD.
Part 3 covers an important aspect of getting the right answers: back-conduction and core state variability.
Part 4 covers detailed modeling of LHPs in TD/FloCAD such that transient operations such as start-up, gravity assist, and thermostatic control can be simulated.

May 31, 2018, 1-2pm (PT), 4-5pm (ET)

This webinar provides an overview of LHP design and operation, from a basic understand of components to a review of important performance considerations and limitations.

Many topics will be covered, from start-up issues to the purpose of the evaporator bayonet to capillary flow regulators to load balancing in parallel LHP units. However, we will cover these topics only in enough depth that you will be able to understand the reasons for various modeling approaches that will be covered in later webinars. In other words, this webinar will survey the various ways in which LHPs require a specialized approach to design analysis and simulation.

This webinar is one of a four-part webinar series on LHPs and approaches to modeling them. Each webinar will last 60 minutes and is designed to be attended in the order they were presented. If you miss one in the series, please check out our video page for a recording, or contact us before the next webinar starts.

Prerequisites: Basic understanding of two-phase thermodynamics and heat transfer.
Please register for Part 1 here

June 5, 2018, 8-9am (PT), 11am-noon (ET)

This webinar explains how the toolbox approach of Thermal Desktop and FloCAD can be used to design and simulate LHPs at a system level, where the focus is on predicting conductance of nominally operating LHP, including thermostatic control (variable conductance).

This webinar is one of a four-part webinar series on LHPs and approaches to modeling them. Each webinar will last 60 minutes and is designed to be attended in the order they were presented. If you miss one in the series, please check out our video page for a recording, or contact us before the next webinar starts.

Prerequisites: Basic understanding of Thermal Desktop and FloCAD operation as applied to two-phase systems. Basic familiarity with LHP components and operation (see Part 1).
Please register for Part 2 here

June 7, 2018, 8-9am (PT), 11am-noon (ET)

Modeling wick back-conduction in an LHP is critical to accurate prediction of the overall loop conductance and operating point. This prediction can't be separated from an understanding of what is happening in the wick core. This webinar presents time-honored methods of dealing with these complex topics in a relatively simple (if abstract) thermal/fluid network.Prerequisites:

This webinar is one of a four-part webinar series on LHPs and approaches to modeling them. Each webinar will last 60 minutes and is designed to be attended in the order they were presented. If you miss one in the series, please check out our video page for a recording, or contact us before the next webinar starts.

Basic understanding of Thermal Desktop and FloCAD operation as applied to LHP modeling (see Part 1 and Part 2).
Please register for Part 3 here

June 12, 2018, 1-2pm (PT), 4-5pm (ET)

This webinar explains how Thermal Desktop and FloCAD can be applied to simulate complex and transient phenomena in LHPs, including condenser design, start-up, thermostatic control, and gravity assist (evaporator below condenser). The design of an actual LHP will be used to demonstrate concepts; the implications of attaching large masses to the evaporators (cooled electronics and support structures) will become clear as a result.

This webinar is one of a four-part webinar series on LHPs and approaches to modeling them. Each webinar will last 60 minutes and is designed to be attended in the order they were presented. If you miss one in the series, please check out our video page for a recording, or contact us before the next webinar starts.

Prerequisites: Familiarity with LHP modeling approaches in TD/FloCAD (see Part 1Part 2 and Part 3).
Please register for Part 4 here