ClueLuma

Liquid-water sensible heat calculator

Uses 8.34 lb/1 gal water density and Cp near 1 Btu/(1 lb·1 Δ°F).

Units
qwater=500×GPM×ΔTq_{\text{water}} = 500 \times \mathrm{GPM} \times \Delta T

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

gal/min
°F
Btu/h

Worked example

Given

  • GPM\mathrm{GPM} = 100 gal/min
  • ΔT\Delta T = 10 °F
qwater=500×100×10=500,000q_{\text{water}} = 500 \times 100 \times 10 = 500{,}000

Symbols and units

SymbolMeaningUnit
qwaterq_{\text{water}}water sensible heat rateBtu/h
GPM\mathrm{GPM}liquid-water flowgal/min
ΔT\Delta Twater temperature change°F

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Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.