High-cycle regenerative heat exchanger

Details High-cycle regenerative heat exchanger High-cycle regenerative heat exchanger

1995-10-26

1997-12-09

Rivell, John

Heat exchange

Regenerator

Heat collector

165 4, F28D 1900

Patent

active

056950020

ABSTRACT:
A high-cycle regenerative combustion system has first and second regenerative heat exchanger units. A four-way valve is provided for alternately bringing the heat exchanger units into contact with a low temperature fluid and a high temperature fluid. The valve is switched at a switching cycle time not longer than 60 seconds. Each heat exchanger unit has a void ratio .epsilon. which substantially provides the maximum value (Q/V)max of the volumetric efficiency (Q/V). The temperature efficiency .eta. t is preset to be a value in a range between 0.7 and 1.0. The heat transmission coefficient h and the heat transmission area A of the heat exchanger unit are determined such that the temperature efficiency, which is calculated in accordance with a specific equation as being a function of the heat transmission coefficient, the heat transmission area and the switching cycle time .tau., falls under the preset value within the range mentioned above. Each of the first and second heat exchanger units has the cell pitch P and the cell wall thickness b, which provide the above-mentioned values of the void ratio, heat transmission coefficient and heat transmission area. Thus, a compact and high-performance regenerative heat exchanger can be obtained, which has a reduced overall volume while exhibiting the large heat transmission rate and high temperature efficiency.

REFERENCES:
patent: 3207493 (1965-09-01), Swain
patent: 3375867 (1968-04-01), Daunt
patent: 3712597 (1973-01-01), Waitkus et al.
patent: 4299561 (1981-11-01), Stokes
patent: 4337585 (1982-07-01), Hebrank
patent: 4627485 (1986-12-01), Osborn
Nippon Furnace Kogyo Kaaisha, Ltd., Masao Kawamoato and Hirokuni Kikukawa "High-Cycle Regenerative Combustion System", JFRC 1990 (Dec., 1990).
Nippon Furance Kogyo Kaisha, Ltd., Mamoru Matsuo "High-Cycle Regenerative Combustion System, " 149 JITSUMU Tenbo (Sep. 1992).
Patent Abstracts of Japan, vol. 17, No. 27 (M-1355) (Jan. 1993).

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