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add hydraulic resistance and heat transfer coefficient, and correspon…#208

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feature/hydraulic-resistance-andheat-transfer-coefficients
Open

add hydraulic resistance and heat transfer coefficient, and correspon…#208
henmcn wants to merge 7 commits into
mainfrom
feature/hydraulic-resistance-andheat-transfer-coefficients

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@henmcn

@henmcn henmcn commented May 20, 2026

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…ding gradients

@henmcn henmcn marked this pull request as ready for review May 20, 2026 14:08
@henmcn henmcn requested a review from a team as a code owner May 20, 2026 14:08

@evertoncolling evertoncolling left a comment

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Make sure the values are consistent within a given unit and are accurately representing the values from the source when a canonical source is referenced.

Comment thread versions/v1/units.json Outdated
"sourceReference": null
},
{
"externalId": "hydraulic_resistance:pa-per-m3s",

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This entry is completely messed up. In the name and description, it refer to linear hydraulic resistance, but in the symbol and aliases it refers to quadratic hydraulic resistance.

The linear version has an entry in qudt and should be adopted as the canonical reference: https://qudt.org/vocab/unit/PA-SEC-PER-M3

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The quantity here would be "Pressure in Relation to Volume Flow Rate" (or "Pressure in Relation to Squared Volume Flow Rate" if the quadratic variation is the one of interest).

Comment thread versions/v1/units.json Outdated
{
"externalId": "heat_transfer_coefficient:watt-per-m2k",
"name": "WATT-PER-M2K",
"quantity": "Heat Transfer Coefficient",

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When following qudt, we should adopt the same values for the qudt entries. For example, the quantity here should match the qudt quantityKind "Coefficient of Heat Transfer".

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I didn’t check the other fields this time, as I see it’s not matching at all to the source.

Comment thread versions/v1/units.json Outdated
Comment on lines +12486 to +12487
"source": "https://qudt.org/vocab/unit/W-PER-M2-K",
"sourceReference": null

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I recommend looking at existing entries and follow the existing patterns in the catalog.

Suggested change
"source": "https://qudt.org/vocab/unit/W-PER-M2-K",
"sourceReference": null
"source": "qudt.org",
"sourceReference": "https://qudt.org/vocab/unit/W-PER-M2-K"

Comment thread versions/v1/units.json Outdated
{
"externalId": "heat_transfer_coefficient_gradient:watt-per-m2k-per-day",
"name": "WATT-PER-M2K-PER-DAY",
"quantity": "Heat Transfer Coefficient Gradient",

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This quantity should be something like: "Coefficient of Heat Transfer Per Time", as gradients in this catalog are used for spatial gradients, not temporal ones, and that would introduce ambiguity.

Comment thread versions/v1/units.json Outdated
{
"externalId": "hydraulic_resistance_gradient:pa-per-m3s-per-day",
"name": "PA-PER-M3S-PER-DAY",
"quantity": "Hydraulic Resistance Gradient",

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This one would be: "Pressure in Relation to Volume Flow Rate Per Time"

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