Nicholas Sanders

US Patent:

42920620, Sep 29, 1981

Filed:

Mar 20, 1980

Appl. No.:

6/132140

Inventors:

Horia A. Dinulescu - Minneapolis MN
Nicholas A. Sanders - Hastings MN

International Classification:

F25B 1900

US Classification:

62 7

Abstract:

A fuel tank is provided for the automotive transport of a cryogenic liquid fuel which in the course of transport is being consumed by an engine or the like. The fuel tank consists essentially of two containers, one for the cryogenic fuel and the other for a secondary cryogenic liquid which is used to cool the fuel during storage when no fuel is being consumed. By the method of the invention the build up of fuel vapor pressure during storage is avoided and the vapor pressure maintained at a predetermined level. The fuel tank described herein was two distinct modes of operation, namely, the fuel storage mode and the fuel supply mode. In the fuel storage mode the cryogenic fuel is being stored for later use while the secondary fluid is being used as a heat sink for the heat absorbed by the tank from the environment. In the fuel supply mode fuel is being supplied by the tank for consumption both as a liquid and as a gas while the secondary fluid is being restored to its initial state of lower temperature by the use of a refrigerator which employs the fuel as a heat sink. The two containers are thermally insulated from the outside environment as well as from each other.

US Patent:

43089151, Jan 5, 1982

Filed:

Oct 27, 1980

Appl. No.:

6/200927

Inventors:

Nicholas A. Sanders - Minneapolis MN
Horia A. Dinulescu - Minneapolis MN

International Classification:

F28F 310

US Classification:

165166

Abstract:

A thin sheet heat exchanger is provided which facilitates the transfer of heat between two flowing streams of gas. The heat exchanger is formed of a packing of rectangular heat exchange plates positioned by the method of the present invention separately and parallelly to one another. The packing realizes a crossflow channel pattern for the two gas streams. The heat exchange plates which compose the bulk of the heat exchanger are, by the method of the present invention, folded at two opposite sides. The plates are stacked as prescribed by the method of this invention, and seamweld (or equivalent) sealed along the folded sides of each pair of consecutive plates, thus forming individual gas channels. Also by the method of the present invention gasket sealing surfaces and flange mounting surfaces are realized by the said folds of the said heat exchange plates. A heat exchanger system can be constituted by a plurality of said heat exchangers assembled, by the method of the invention, to relaize a desired combination of flow patterns.