29th Symposium on Fusion Technology (SOFT 2016)

P4.163 Development of Cryoadsorption Cryopump & its Related Auxiliary Technologies in India

8 Sep 2016, 14:20

1h 40m

Foyer 2A (2nd floor), 3A (3rd floor) (Prague Congress Centre)

Board: 163

Poster H. Fuel Cycle and Breeding Blankets P4 Poster session

Speaker

Ranjana Gangradey (Development of cryopump and pellet injector system)

Description

Indigenous cryoadsorption cryopump with large pumping speeds gases like hydrogen and helium is developed and a set of experiments performed at the Institute for Plasma Research (IPR). India. Towards its successful realization, technological bottlenecks were identified, studied and resolved. Hydroformed cryopanels were developed from concept leading to the design and product realization with successful technology transfer to the industry. It led to the expertise for developing hydroformed panels for any desired shape, geometry and welding pattern. Activated sorbents were developed, characterized using an experimental set up which measures adsorption isotherms down to 4K for hydrogen and helium. Special techniques were evolved for coating sorbents on hydroformed cryopanels with suitable cryo-adhesives. Various arrangements of cryopanels at 4K surrounded by 80 K shields and baffles (which are also hydroformed) were studied and optimized by transmission probability analysis using Monte Carlo techniques. CFD analysis was used to study the temperature distribution and flow analysis during the cryogen flow through the panels. Integration of the developed technologies to arrive at the final product was a challenging task and this was meticulously planned and executed. Result was a cryoadsorption cryopump offering pumping speeds as high as 50,000 to 70,000 l/s for helium and 1,50,000 l/s for hydrogen with a 3.2m²2 of sorbent panel area. From R&D to product development has led to establishment of a dedicated lab with design and characterization facilities under one roof. The first laboratory scale pump integrating the developed technologies was a Small Scale CryoPump (SSCP-01) with a pumping speed of 2,000 l/s for helium. Subsequently, Single Panel CryoPump (SPCP-01) with pumping speed 10,000 l/s for helium and a Multiple Panel CryoPump (MPCP-08) with a pumping speed of 70,000 l/s for helium and 1,50,000 l/s for hydrogen respectively were developed. This paper describes realization of journey towards development of product.