| General > General Technical Chat |
| WHO USED ALL THE HOT WATER!!! Need a simple temperature data logger ** UPDATE ** |
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| RoGeorge:
Temperature alone won't tell the amount of water. For that, you'll need a water calorimeter, which accounts for both the water temperature and the debit. And that still won't tell who used all the hot water, unless you add webcams at the girls college dorm showers. ;D |
| AndyBeez:
Day 22 in the Big Brother household and someone has used all of the hot water. Angry housemate Nikki is in the Diary Room... Politics and comedy aside, this scenario suggests you guys have heating system that is not fit for purpose. What are you/they paying for? Google for Bluetooth data logger. |
| Brumby:
--- Quote from: RoGeorge on August 20, 2023, 08:00:15 am ---Temperature alone won't tell the amount of water. For that, you'll need a water calorimeter, which accounts for both the water temperature and the debit. --- End quote --- Absolute accuracy is not required - simple relative comparison will suffice for the basic requirement. When and how long is enough for them. I was considering the temperature gradient idea as an extra indication. --- Quote ---And that still won't tell who used all the hot water, unless you add webcams at the girls college dorm showers. ;D --- End quote --- That is not a problem I have to address. If I simply make the times known, the head of the household can work that out. |
| ejeffrey:
--- Quote from: Brumby on August 20, 2023, 07:38:23 am --- The actual flow is a secondary issue as it seems the main offenders simply turn the hot tap on full and regulate with the cold. --- End quote --- I'm not sure what plumbing fixtures you have but that's not generally how it works. The flow is mostly regulated by the shower head. The tap handles set the blend ratio if you open the hot water tap full and then open the cold water tap to set the temperature the hot water flow will decrease. That said it probably doesn't matter. Assuming people are actually in the shower and not just letting the hot water run to make a steam room there is a fairly narrow range of water temperature most people will tolerate so a simple on timer is probably going to be accurate enough. I'm not sure how fast the pipes cool down after the water shuts off and how much that might complicate your measurement. Another possibility would be a microphone or vibration sensor to detect if water is flowing in the hot water pipe. |
| themadhippy:
--- Quote ---the head of the household has raised the request. --- End quote --- --- Quote --- but I don't really have time for developmen --- End quote --- surely you can use the development time to your advantage to get out of other ,less intresting duties. "we need to go shopping/visit the inlaws/sort the garden" "loved to,but i really want to get this temperature logger finished that you said was urgent" |
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