Today’s formulaSunday 18 October
Heating seasonGlycol Dilution
Heating season start-up: loops get their glycol and boilers come back on.
Share it as formula.expert/today: the link always opens that day’s formula.
How it is chosen
- One formula per day, the same for everyone, turning over at midnight Pacific.
- Named days win: Mole Day gets Avogadro, Pi Day gets π, World Water Day gets the Langelier index. Next up: Mole Day, Friday 23 October.
- Otherwise the season’s work and the school courses take turns: glycol and boilers in the fall, snow and frost in winter, runoff in spring, cooling towers and pools in summer.
- No formula comes back within 60 days.
The last two weeks
- Saturday 17 OctoberFlash Steam Mass RateHeating season
- Friday 16 OctoberMidpoint FormulaSchool term
- Thursday 15 OctoberHydronic Heat Transfer (Water)Heating season
- Wednesday 14 OctoberTotal R-Value of an AssemblyHeating season
- Tuesday 13 OctoberSimple InterestSchool term
- Monday 12 OctoberNewton's Law of Cooling (Q = hAΔT)Thanksgiving
- Sunday 11 OctoberFreezing-Point DepressionHeating season
- Saturday 10 OctoberPower (P = W/t)School term
- Friday 9 OctoberCombustion (Stack) Efficiency: Siegert FormulaHeating season
- Thursday 8 OctoberGlycol Loop Heat Transfer (Capacity Derate)Heating season
- Wednesday 7 OctoberpH from Hydrogen Ion ConcentrationSchool term
- Tuesday 6 OctoberBoiler Blowdown Rate from Steam RateHeating season
- Monday 5 OctoberHydronic Static Fill PressureHeating season
- Sunday 4 OctoberSensible Heat (Q = mcΔT)School term