Hospital oxygen tank valve defrosting system

Résumé

This research aimed to develop a liquid oxygen tank valve defrosting system that could be used in hospitals to enable a steady supply of oxygen even during cold weather or periods of high oxygen demand. The system was intended to be used as a viable alternative to the hosing systems currently used in many South African hospitals by being partially autonomous and environmentally friendly in its design and operation. Based off conducted research and interviews from hospital personnel, focus was placed on developing a defrosting system that used flowing water to melt ice. The development of the defrosting system was successful, and the system was able to conduct the independent tests reliably. Although the conducted testing did not involve using the defrosting system on a real liquid oxygen gas tank’s frozen valve, various analyses were conducted with respect to flow rate performance, effects of water loss and the degradation of performance due to cold temperatures. Based off practical testing on ice, it was concluded that the system should be able to perform similarly if used on the liquid oxygen tank valves of hospitals and that the defrosting system should theoretically prove effective even under high oxygen demand or cold weather. The developed defrosting system should be an effective solution to the stated predicament of frozen oxygen tank valves in hospitals and is theoretically a viable alternative to the hosing system currently used by many South African hospitals.

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