Heat exchange – Regenerator – Checker brick structure
Patent
1972-03-13
1976-01-20
Davis, Jr., Albert W.
Heat exchange
Regenerator
Checker brick structure
165DIG8, 165165, F28F 300, F28F 2106
Patent
active
039331954
ABSTRACT:
A high efficiency liquid-liquid heat exchanger is made by imbedding 1 mill polyester plastic film in a mass of quartz pebbles. The quartz pebbles are 0.125 to 0.25 inches in diameter and are placed in 0.25 to 0.5 inches thick layers between the plastic sheets. The two liquids flow on alternate sides of the sheets and the flows of the liquids are given a 90.degree. angular spiral flow in relation to each other by strips of plastic cemented between the sheets. In this way a stream tube, or small division of the main flow of one of the liquids, is heated by short elements of a large number of stream tubes of the other liquid and the effects of uneven placement of the pebbles and the resulting channeling of the liquids are overcome. Heat transfer coefficients as high as several hundred BTU's per degree Fahrenheit per hour per square foot of plastic surface have been easily obtained with very low pressure drops. The plastic sheets and quartz pebbles are very cheap and the heat exchanger is easily assembled. The heat exchanger can be operated, if desired, at relatively high flow rates and pressure drops, and higher heat transfer rates obtained.
REFERENCES:
patent: 3075580 (1963-01-01), Davis, Jr.
patent: 3216492 (1965-11-01), Weaver
patent: 3705618 (1972-12-01), Jouet et al.
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