Storage Tank Insulation Heat Loss & Cool-Down Calculator
Calculate vertical liquid storage tank heat losses from shell, roof, and floor, steam coil holding duty (MMBTU/hr & kW), and unheated cool-down rate.
Tank Dimensions & Stored Liquid
Insulation Specifications
Heat Balance & Heating Coil Duty
Frequently Asked Questions
Why does an uninsulated tank roof cause disproportionately high heat loss?
Hot liquid constantly evaporates and transfers sensible heat to the vapor head-space. Warm vapor rises and condenses on the underside of the cold uninsulated steel roof plate, transferring huge latent heat via a continuous internal distillation cycle. Insulating the roof can slash total tank energy loss by 35% to 50%.
How does wind speed influence tank insulation jacket selection?
Outdoor wind strips the convective surface boundary layer. Tanks clad with corrugated aluminum jacket panels require secure band spacing (typically 12-inch centers) and neoprene-washered self-tapping screws to prevent high-wind blow-offs and moisture ingress.
What is the consequence of asphalt or heavy fuel oil cooling below pumping temperature?
Heavy asphalt (e.g. PG 64-22) solidifies into a semi-solid viscous pitch below 200°F (93°C). If tank heating coils fail and temperature drops below 180°F, the product cannot be pumped, and expensive external thermal re-melting procedures are required to restore flow.