Abstract: In accordance with the present invention, there is provided a tubular heat exchanger wherein a central tube is employed to enclose an internal heated fluid which ascends inside the central tube. The heated fluid is then radially disbursed as it converges toward the internal surface of a top cover of the heat exchanger assembly, being forced outwardly under the top flange by the updraft force of the heated fluid, which forces the heated fluid downwardly apportioning the heated fluid around equally spaced axially arranged heat transfer tubes surrounded by an outer tube which are in sealed engagement with the top flange and attach at the bottom in sealing engagement with the exhaust collection manifold. The heated fluid descends around the tubes and enters an exhaust manifold exiting through an exhaust pipe. The heat transfer fluid enters a lower plenum and flows around the heat exchanger core into an upper plenum.

Abstract: A tubular heat exchanger employing radially arranged heat exchange tubes surrounding and attached to a center tube enclosing a heat source by an annular top flange attached to a removable top cover above the tube arrangement. The heat exchange tubes are connected at the bottom to an exhaust collection manifold which is in turn connected to an exhaust outlet pipe vented to the atmosphere. As heated fluid ascends inside the center tube, it is forced outwardly inside the top cover, apportioning the heated fluid into equally spaced radially arranged heat exchange tubes. The heated fluid descends inside the heat exchange tubes, disbursing heat outwardly through the walls of the heat exchange tubes into the ascending heat transfer fluid. The mostly cooled heated fluid is collected and recombined in the exhaust collection manifold and into the exhaust outlet pipe. The heat transfer fluid ascends above the top cover for final utilization.

Abstract: A tubular heat exchanger employing radially arranged heat exchange tubes surrounding and attached to a center tube enclosing a heat source by an annular top flange attached to a removable top cover above the tube arrangement. The heat exchange tubes are connected at the bottom to an exhaust collection manifold which is in turn connected to an exhaust outlet pipe vented to the atmosphere. As heated fluid ascends inside the center tube, it is forced outwardly inside the top cover, apportioning the heated fluid into equally spaced radially arranged heat exchange tubes. The heated fluid descends inside the heat exchange tubes, disbursing heat outwardly through the walls of the heat exchange tubes into the ascending heat transfer fluid. The mostly cooled heated fluid is collected and recombined in the exhaust collection manifold and into the exhaust outlet pipe. The heat transfer fluid ascends above the top cover for final utilization.

Abstract: In accordance with the present invention, there is provided a tubular heat exchanger wherein a central tube is employed to enclose an internal heated fluid which ascends inside the central tube. The heated fluid is then radially disbursed as it converges toward the internal surface of a top cover of the heat exchanger assembly, being forced outwardly under the top flange by the updraft force of the heated fluid, which forces the heated fluid downwardly apportioning the heated fluid around equally spaced axially arranged heat transfer tubes surrounded by an outer tube which are in sealed engagement with the top flange and attach at the bottom in sealing engagement with the exhaust collection manifold. The heated fluid descends around the tubes and enters an exhaust manifold exiting through an exhaust pipe. The heat transfer fluid enters a lower plenum and flows around the heat exchanger core into an upper plenum.