Heat exchange – Regenerator – Checker brick structure
Patent
1982-07-23
1984-06-05
Richter, Sheldon J.
Heat exchange
Regenerator
Checker brick structure
165 46, 165115, 165166, 165DIG8, F28F 2502, F28D 900
Patent
active
044523009
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method for the exchange of heat between liquid and air.
The exchange of heat between air and liquid, especially water, plays an important part in our use of energy, for instance in the cooling and heating of buildings, air treatment, industrial heating processes, such as drying etc. In many energy systems using, for example, heat pumps, solar heat, waste heat or district heating, the efficiency could be improved considerably if the flow resistance in the heat exchangers employed were reduced. However, this would result in heat transmission surfaces substantially larger than is economically feasible with today's technology.
Known heat exchangers for liquid/air are designed as closed pipe systems for liquid circulation, and the outer pipe surface area which is the heat-exchanging surface towards the air, is frequently increased by finning. To ensure stability and heat conductivity, the pipes and fins are preferably made of metal. Such heat exchangers are expensive and, besides, suffer from the disadvantage that the fins cause a certain flow resistance, and that it is difficult to defrost the space between the fins. Furthermore external and internal corrosion may occur.
The present invention has for its object to offer a method of effecting heat exchange between an air flow and a liquid flow by simple and inexpensive means having a high stability to external and internal corrosion and a very low resistance to heat conductivity. To realize this object, the liquid is caused to flow by gravity as a liquid film spreading under capillary action between two substantially vertically oriented membranes held together by the adhesive force in the liquid film, and air is conducted in contact with the sides of the membranes facing away from the liquid film for heat exchange through said membranes.
The invention also comprises a heat exchanger intended for carrying the above method into effect and characterised by a heat-exchanging surface consisting of at least two vertical band-shaped membranes, the surfaces of which are disposed opposite and at a slight distance away from one another and which are held together by a liquid film spreading under capillary action, means for supplying and uniformly distributing the liquid flow in the upper part of the space between said membranes, means for taking up the liquid from the lower part of said space between said membranes, and means for conducting the air into contact with the surfaces of said membranes facing away from one another.
The invention will be described in more detail in the following, reference being had to the accompanying drawings which illustrate embodiments of the invention.
FIG. 1 illustrates schematically in lateral vertical section a flow diagram during heat exchange according to the invention.
FIGS. 2 and 3 illustrate the heat exchanging surface of the arrangement as shown in FIG. 1 in a vertical section from in front and in a horizontal section, respectively.
FIGS. 4 and 5 are, respectively, front and lateral sections, on a larger scale, of a practical embodiment of a heat exchanger according to the invention.
The method of effecting heat exchange according to the invention will be described first, with reference to FIGS. 1-3.
The invention utilizes as the heat-exchanging surface one or more band-shaped pairs of membranes 3 consisting of two thin membranes 4a and 4b held together by a film 5 of a liquid 1 spreading under capillary action. By suspending or clamping said pair of membranes 3 in vertial position and by supplying, without positive pressure, a weak flow of the liquid 1 along the upper horizontal opening 31 of said pair of membranes, a uniformly distributed downward flow of said liquid film 5 under the action of gravity and flow resistance is obtained. With small flows, the adhesive forces between the membrane surfaces are substantially greater than the static liquid pressures, and uniform flow pattern is obtained along the entire vertical extent of said pair of membranes 3.
Heat exchange from the liquid flow 1 s
REFERENCES:
patent: 1694370 (1928-12-01), Burdick
patent: 3913667 (1975-10-01), Meylan et al.
patent: 4119140 (1978-10-01), Cates
patent: 4133377 (1979-01-01), de Lallee et al.
patent: 4216820 (1980-08-01), Andrew
patent: 4372897 (1983-02-01), Sanderson et al.
LandOfFree
Method for the exchange of heat between liquid and air and an ap does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for the exchange of heat between liquid and air and an ap, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the exchange of heat between liquid and air and an ap will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1493293