Liquid heaters and vaporizers – Water tube – Coil
Patent
1984-11-29
1986-11-11
Makay, Albert J.
Liquid heaters and vaporizers
Water tube
Coil
122 18, 122169, 165156, 165163, F22B 2126
Patent
active
046215921
ABSTRACT:
A flash boiler or steam generator includes a shell defining a combustion chamber. A coil bank is mounted adjacent to the combustion chamber and includes an inner coil defining a heat absorption chamber. An intermediate coil is positioned in the chamber surrounding the inner coil. An outer coil surrounds the intermediate coil. The outer coil is in serial communication with a source of fluid and with the inner coil. The inner coil is in serial communication with the intermediate coil and the intermediate coil communicates with an outlet. To limit pressure drop through and increase heat transfer by the coils, the diameter of the inner coil is larger than the diameter of the outer coil and the diameter of the intermediate coil is larger than the diameter of the inner coil. To further increase the heat absorption efficiency of the coil bank, an extended surface is defined on at least a portion of the outer coil. The extended surface is of helical thread configuration and of a predetermined width and pitch to allow the surfaces to rest on each other once the coils are wound around the combustion chamber.
REFERENCES:
patent: 531756 (1895-01-01), Whitlock et al.
patent: 1469805 (1923-10-01), Musselman
patent: 2160644 (1939-05-01), Clarkson
patent: 2735410 (1956-02-01), Armbrust et al.
patent: 3720259 (1973-03-01), Fritz et al.
patent: 3788281 (1974-01-01), Champagne
patent: 4442799 (1984-04-01), Craig et al.
Lidd Francis J.
Makay Albert J.
Vapor Corporation
Warner Steven E.
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