ABOVE-GROUND STORAGE TANKS WITH INTERNAL HEAT SOURCE

1 . An above-ground storage tank having an interior volume and an internal containment chamber separated from the tank interior volume by a containment wall, said tank comprising a flameless heat source disposed within the containment chamber.

2 . The tank of claim 1 wherein the tank is a double-walled tank and comprises:

(a) a tank roof, a tank floor, a primary tank wall and a secondary tank wall, and an interstitial space therebetween;

(b) the containment chamber formed by a primary chamber wall and a secondary chamber wall, forming a chamber interstitial space therebetween, and an exterior door assembly;

(c) the flameless heat source mounted to the secondary chamber wall.

3 . The tank of claim 1 wherein the flameless heat source comprises at least one catalytic heater.

4 . The tank of claim 1 further comprising heat transfer elements disposed within the chamber interstitial space.

5 . The tank of claim 4 further comprising heat radiating fins mounted to the primary chamber wall, extending into the tank interior volume.

6 . The tank of claim 4 or 5 wherein the heat transfer elements comprises a metal honeycomb or mesh in contact with both the secondary containment wall and the primary containment wall.

7 . A method of heating an above-ground fluid storage tank, said tank having an interior volume and a containment chamber formed by a containment wall separating the containment chamber from the tank interior volume, the method comprising the steps of heating the containment wall by radiative means, and conducting heat into the tank interior volume from the containment wall.

8 . The method of claim 7 wherein the containment wall is heated by radiative heat from a catalytic heater.