Internal heat exchanger

Details Internal heat exchanger Internal heat exchanger

2007-01-03

2009-11-24

Leo, Leonard R (Department: 3744)

Heat exchange

Flow passages for two confined fluids

C165S177000, C062S513000

Reexamination Certificate

active

07621320

ABSTRACT:
In an internal heat exchanger, when a corresponding diameter of a high pressure passage5ais Ψh, a passage length Lh of the high pressure passage (5a) is so set as to satisfy the relation 9.16/{LN(4.5−Ψh+1.03)}<Lh<46/{LN(4.5−Ψh+1.03)}, and when a corresponding diameter of a low pressure passage5cis Ψl, a passage length Ll of the low pressure passage5cis so set as to satisfy the relation 9.16/{LN(0.56×6−Ψl+1.02)}<Ll<46/{LN(0.56×6−Ψl+1.02)}, a passage sectional area Ah of the high pressure passage5ais so set as to satisfy the relation 100×(0.25×Ψh1.2)−1/(0.04×Ψh+1.7)≧Ah≧100×(500×Ψh1.2)−1(0.04×Ψh+1.7), and a passage sectional area Al of the low pressure passage5cis so set as to satisfy the relation 1.65/Ψl0.67<Al<626/Ψl0.67.

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Office Action dated Mar. 13, 2008 in Japanese Application No. 2003-281817 with English translation thereof.

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