Oxygen Reservoir System

The system consists of two parts: (1) a compressor pump and (2) storage vessels. The compressor consists of a 12 V pump that can be powered from electrical sources between 85 – 290 V. The compressor has three connection ports: inlet from the oxygen concentrator, outlet to the vessel, and the mains power lead connector.

There are two reservoir vessels: a 100 L capacity vessel and a 20 L capacity vessel. The vessels are filled from an oxygen concentrator using a compressor pump, and the oxygen is stored at 5 bar for later use, and the vessels are certified to 10 bar. At 5 bar pressure, the 20 L vessel has a storage of 100 L of oxygen, and the 100 L vessel has a storage of 500 L of oxygen. The vessels are made from aluminum and are cylindrical. The vessels come equipped with a quick release supply fitting and tube. Using an 8 L/min oxygen concentrator, the small vessel can be filled in 15 minutes and the large vessel can be filled in 60 minutes. The vessels can supply an outflow of oxygen until the internal vessel pressure reaches 1.2 bar, whereby an alarm will sound indicating the need to replace the oxygen supply and refill the vessel.

Product dimensions and weight for the 20 L vessel: 25 x 25 x 70 cm, 6 kg

Product dimensions and weight for the 100 L vessel: 40 x 40 x 105 cm, 13.5 kg

Provided by the manufacturer.

At least 5 years. The first device was deployed 5 years ago and it is still functioning as required. ^{Interview with designer, August 2020}

Product testing in Sierra Leone had the following results:

• The hospital staff and technicians were able to successfully setup the Oxygen Reservoir System.
• In two months, almost 350 L of O₂ was produced, giving an average of 5 L per day.
• Staff and nurses were trained on the setup and use of the product.

Full details of the product testing can be found here.

The compressor pump has several safety features: an overpressure cutoff, flow restrictors to avoid over-demand from the concentrator, and a flame guard fire safety device.