I am looking for direction on how to best implement the following;
I want to be able to calculate the consumption of oil I use for heating from a known value (my oil tank). I have a device that is turned “on” when my boiler runs and in another automation system I would take the daily runtime (in hours) of this device and multiple it by the burn rate of my burner which is .85 gallons an hour. I would then take this “gallon-used” value and subtract it from the “tank-gallons” value. This would then give me the remaining “new-tank-gallons” value which would be saved as the new value of “tank-gallons” to be subtracted from the new day.
So as an example, if starting from a full tanks, the logic would look like this.
275 “tank-gallons” - “gallons-used” which is (runtime of device y for the past 24 hours x .85)
this would be the new value for “new-tank-gallons”
“new-tank gallons” would be saved as the new value of “tank-gallons” until the next days usage.
When I get an oil delivery, I would set the value of “tank-gallons” back to 275.
Thanks in advance for any help in coming up with a solution for this.
I use the following vb script to perform this currently.
Sub Main(parm as object)
dim tank = 824 'device reference for virtual tank level
dim oilburned = 924 'device reference for Gallon Used Prio Day
dim heating = 735 'Device reference for thermostat operating state
dim rate = .832 'Gallons per hour burned original .85
dim zwave = 1 'Multiplier for fine tunning
dim runtimer = “Heating” 'name of hs timer
dim heatcycles = “Heat Cycles” 'name of hs counter tracking 3 minute MOT
dim gallonsold = hs.DeviceValueEx(tank) 'Read in current gallons
dim gallons
dim gallonsUsed
dim gallonsUsedToday
dim gallonsnew
gallonsUsed = (hs.TimerValue(runtimer).totalhours * zwave) * rate
gallonsUsedToday = math.round(gallonsUsed,2)
gallons = gallonsold - gallonsUsedToday
gallonsnew = math.round(gallons,2)
hs.WriteLog (“Info”, “Number of gallons used today " + gallonsUsedToday.ToString + " Gallons.”)
hs.WriteLog (“Info”, “Old Gallons Value " + gallonsold.ToString + " Gallons.")
hs.TimerReset(runtimer)
hs.CounterReset(heatcycles)
hs.TriggerEvent(“Stop heat timer”)
hs.SetDeviceValueByRef(tank, gallons, True)
hs.SetDeviceString(tank, gallons.ToString + " Gallons", True)
hs.SetDeviceValueByRef(oilburned, gallonsUsedToday, True)
hs.SetDeviceString(oilburned, gallonsUsedToday.ToString + " Gallons", True)
hs.WriteLog (“Info”, “Update heating oil to " + gallons.ToString + " Gallons.”)
End Sub
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