About the work
The purpose of this work is to verify that the First Principles Calculation (FPC) method used to
estimate liquid hydrogen (LH2) boil-off is mathematically correct.
A steady-state thermal model developed in ANSYS Mechanical is used to determine the
physically realistic heat leak into the cryogenic tank.
The heat leak obtained from the ANSYS simulation is then substituted into the same First
Principles equation used in the original estimate.
If both approaches produce identical boil-off values when the same heat leak is used, this confirms
that the First Principles Calculation method itself is mathematically correct.
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Title Verifying_FPC_methods for calculating Boil-Off Rates
The purpose of this work is to verify that the First Principles Calculation (FPC) method used to
estimate liquid hydrogen (LH2) boil-off is mathematically correct.
A steady-state thermal model developed in ANSYS Mechanical is used to determine the
physically realistic heat leak into the cryogenic tank.
The heat leak obtained from the ANSYS simulation is then substituted into the same First
Principles equation used in the original estimate.
If both approaches produce identical boil-off values when the same heat leak is used, this confirms
that the First Principles Calculation method itself is mathematically correct.
Work type Architecture and engineering
Tags cryogenic, boil-off %/day, liquified hydrogen (lh2), energy storage., unique cryogen design, passive insulation
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Registry info in Safe Creative
Identifier 2603154940055
Entry date Mar 15, 2026, 7:20 PM UTC
License All rights reserved
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Copyright registered declarations
Author. Holder Paul Byrne. Date Mar 15, 2026.
Information available at https://www.safecreative.org/work/2603154940055-verifying_fpc_methods-for-calculating-boil-off-rates
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Registration: 2603154940055
