| 摘要 |
<p>Embodiments of a pressurized gas supply (10, 30, 50) are provided. In one embodiment, the pressurized gas supply includes a pressurized gas reservoir (14, 34, 54) and a pressure reducer (16, 40, 56) fluidly coupled to the pressurized gas reservoir. The pressure reducer is configured to reduce the pressure of gas received from the pressurized gas reservoir to a predetermined output pressure (Po). A gas mixture is held within the pressurized gas reservoir at a starting pressure (Ps) and at a starting temperature (Ts). The gas mixture includes: (i) a warming gas having a positive Joule-Thompson (JT) coefficient at Ts and over the pressure range Ps-Po, and (ii) a cooling gas having a negative JT coefficient at Ts and over the pressure range Ps-Po. The cooling of the cooling gas at least partially offsets the warming of the warming gas when the gas mixture is expelled by the isothermal gas supply to achieve a desired gas output temperature.</p> |
