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Non-counter current capillary cooling

Capillary cycle cooling is based on the principle of evaporation. Transferring heated air over the capillary structure, in theory, allows for the evaporation of the gas to prevent heat build-up. In order to maximise evaporation cycles, cooling agents such as ammoniac, water, alcohol or chlorofluorohydrocarbons are introduced. In basic terms, the faster the evaporation over the capillaries, the more effective the cooling. The difficulty is in designing a capillary structure that allows for faster evaporation cycles to occur.
Non-counter current capillary cooling
A German aerospace manufacturing firm has developed a more effective cooling system that has some innovative concepts behind it, allowing for the transport of heat performances 10 to 100 times higher than conventional capillary structures by primarily focusing the changes made to the evaporation and convection systems. In other words, by adapting the heat-flow mechanisms they've implemented considerable improvements.

By introducing probably the most essential change, in that the evaporated and the condensed coolants are not operative within the same piping, thus eliminating the counter-current flows found in standard cooling systems. Additionally, the capillary structure necessary for evaporation occurs only within the evaporator and not in the heat transport route. Therefore, by introducing separate piping systems for coolants and heat eliminated the counter-current symptom experienced in conventional cooling systems where the coolant utilised the same piping structure. Radically finer pores in the capillary itself, creates fundamentally higher pressure differences, thus optimising faster circulation cycles of the cooling agents, presenting a cooling system that has heat transport cycles 10-100 times faster.

Since heat build-up is problematic to such operating systems, the vastly improved cooling cycle contributes towards extending the life expectancy of machinery as well as reducing operation and maintenance costs. This system has application in nuclear fission, radioactive waste management as well as in the electrical and chemical industries.

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Record Number: 80554 / Last updated on: 2005-09-18
Domain: Energy