Capillary heat loop technology: Space applications and recent Canadian activities

Dynamic response of a capillary pumped loop subjected to various heat load transients

A capillary pumped loop (CPL) is a two-phase heat transfer device capable of transporting a large heat load over long distances with very small temperature differences across the system. The CPL has been under extensive developments over the past two decades. Significant technology advances have been made and the CPLs are the baseline for instrument thermal control of several spacecraft, including the Earth Observing System, Mars Surveyor Program, and Hubble Space Telescope. Some technology issues still exist and need to be resolved in order to improve the performance and reliability of CPL systems. This paper describes the current status of the CPL technology and discusses future development needs.

Recent advances in capillary pumped loop technology

Tpx for in-orbit demonstration of two-phase heat transport technology-evaluation of flight& post-flight experiment results

Two-Phase Loops with Capillary Pump (Loop Heat Pipes (LHP) and Capillary Pumped Loops (CPL)) are currently among advanced thermal control technologies for aerospace applications. Large numbers of experimental and operational two-phase loops were successfully tested and used in several spacecraft in the past two decades. Novel technologies such as Advanced CPL-LHP, High Performance CPL, miniature LHPs, inversion (reversible, "Push-Pull") LHPs, ramified, multiple evaporator and condenser LHPs and CPLs, for complex thermal control systems are being proposed. This paper presents a state-of-the-art survey and analysis of these technologies. A classification of Two-Phase Loop with Capillary Pump designs is recommended. Basic principles, operational conditions and characteristics, temperature control and start-up initiation are discussed. The use of thermal control systems based on Two-Phase Loops with Capillary Pump for space applications is reviewed and summarized. The current and future trends of the technology for the aerospace sector are also discussed.

Advances in Two-Phase Loop with Capillary Pump Technology and Space Applications

In-Orbit Demonstration of Two-Phase Heat Transport Technology: TPX/G557 Development & Pre-Launch Testing

In-orbit demonstration of two-phase heat transport technology: tpxg557 flight results

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Tpx for in-orbit demonstration of two-phase heat transport technology-evaluation of flight& post-flight experiment results

In-Orbit Demonstration of Two-Phase Heat Transport Technology: TPX/G557 Development & Pre-Launch Testing

In-orbit demonstration of two-phase heat transport technology: tpxg557 flight results