How do you calculate BTU of expanding compressed air

[riderb]

I would like to know if there is a measure, in BTU's, of the cooling effect from the release of compressed air through a nozzle and how it relates to PSI

 

[sankalpmittal]

I would like to know if there is a measure, in BTU's, of the cooling effect from the release of compressed air through a nozzle and how it relates to PSI

BTU is the unit of energy and PSI is the unit of pressure. 1 PSI = 6894.757 N/m²

I BTU = 1055 Nm

Now multiply the unit PSI by m³ i.e volume SI unit you get 1 PSI m³ = 6894.757 Nm

1 BTU = 1055 Nm

So 6894.757 Nm = 6.535 BTU
So 1 PSI m³ = 6.535 BTU