could well be. Was mostly a "proof of concept" round of testing and was deemed a failure due to complexity of the tests.
Looking back at the spreadsheet though there were recorded offsets for all probes at the top of the sheet so it isn't strictly speaking a calibration issue. The full loop wasn't insulated either so I would be surprised if that didnt somewhat affect the heat balances either (the dT rad and dT wb numbers are short distances but some of the other ones are quite long)
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