Probe apparatus and method for measuring cryogenic exhaust flow
AssigneeMesser Industries USA, Inc.
InventorJohn Griffiths
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Abstract
A method of determining a flow velocity of a cryogen exhaust gas from a freezer includes an energizing a flow probe with a first voltage to maintain a first temperature for a first period of time; energizing the flow probe with a second voltage to maintain a second temperature for a second period of time, wherein the second temperature is different from the first temperature; determining a heat transfer coefficient at the flow probe; and determining a velocity of the cryogen exhaust gas at the flow probe based on the heat transfer coefficient. A related apparatus is also provided.
Claims12
A method of determining a flow velocity of a cryogen exhaust gas from a freezer comprising:
- energizing a flow probe with a first voltage to maintain a first temperature for a first period of time;
- energizing the flow probe with a second voltage to maintain a second temperature for a second period of time, wherein the second temperature is different from the first temperature;
- determining a heat transfer coefficient at the flow probe;
- and
- determining a velocity of the cryogen exhaust gas at the flow probe based on the heat transfer coefficient.
Dependencies are inferred from the claim text.