#  ##### How to calculate the size of PSA medical oxygen
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Most of the PSA oxygen generation systems are customized, and the oxygen consumption needs to be calculated according to the actual needs of users. The method of calculating the oxygen consumption is not difficult, but it is a necessary business ability for every seller. In this article, CAN GAS will explain how to calculate the amount of oxygen used with combining a small case.

The calculation of professional oxygen consumption needs to refer to GB50751-2012 "Technical Specifications for Medical Gas Engineering", which stipulates that

The oxygen consumption of general wards is 10+6×(Number of general hospital beds-1)×15%=N1(L/min)

The oxygen consumption of the ICU wards is 10+6×(ICU bed-1)×100%=N2 (L/min)

Oxygen consumption in the operating room is 100+10×(operating room-1)×75%=N3 (L/min)

The oxygen consumption of the hyperbaric oxygen chamber is: the number of users × 25 = N4 (L/min)

Based on this, the total peak oxygen consumption is calculated as: N1 + N2 + N3 + N4 = T (L/min), and then convert T into Nm³/h.

For example, suppose that in a certain project, there are A units of general wards beds, B unit of ICU wards, C units wards in the operating room, and D people in the hyperbaric oxygen chamber.

According to the above formula

Oxygen consumption of general wards is 10+6×(A-1)×15%=N1(L/min)

The oxygen consumption of ICU wards is 10+6×(B-1)×100%=N2(L/min)

Oxygen consumption in the operating room is 100+10×(C-1)×75%=N3 (L/min)

The amount of oxygen used in the hyperbaric oxygen chamber is: D×25= N4 (L/min)

Based on this, the total peak oxygen consumption is calculated as: N1 + N2 + N3 + N4 = T(L/min), and then convert T into Nm³/h. 