The invention is a system for heating hydrocarbon flows with three heat exchangers, wherein the first heat exchanger transfers heat from compressed heated air to a pressurized heat exchange fluid; wherein the second heat exchanger transfers heat from the pressurized heat exchange fluid to a hydrocarbon flow and increases the hydrocarbon flow temperature between 50% and 900%; wherein the third heat exchanger receives the pressurized heat exchange fluid from the first heat exchanger and cools the fluid using at least one fan located in the third heat exchanger; and the system also has a vessel to accommodate thermal expansion of the pressurized heat exchange fluid and at least one pump for transporting fluid through the system.