Refrigeration – Utilizing solar energy
Patent
1981-06-30
1984-06-19
Makay, Albert J.
Refrigeration
Utilizing solar energy
62476, F25B 2700
Patent
active
044547277
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF ART
In the conventional dehumidification air-conditioning and method utilizing solar heat, the mechanism is large-scaled in size and low in working efficiency. Also it is difficult for the conventional method to make equal use of solar energy stored in the summer and provide in the winter. Accordingly, an object of this invention is to provide an improvement of the conventional method by using a multistage sun collector, solutions for use in providing dehumidification such as a calcium chloride solution and a vacuum vaporation process.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a schematic view partly cut away and in section of a system according to one embodiment of the present invention; and
FIG. 2 is a view of the vaporation pressure line showing M/1 of calcium chloride as a parameter.
Description of the Preferred Embodiments
Referring first FIG. 1, a concentrated solution storage tank (1) stores a concentrated desiccant solution (2) for use in providing dehumidification. Any kind of solution which provided for dehumidification may be used, but the explanation will be directed to calcium chloride for convenience.
The concentrated solution (2) is passed to a dehumidification room (3) by a pump (32) and dehumidifies the air within the room (3) by a spray method for example. The solution (2) which absorbs moisture is thereby a dilute solution (4). This solution (4) is housed in a dilute solution tank (5). This dilute solution (4) is collected into a concentrated solution (6) through a vacuum evaporation process, and the resulting solution (6) is returned to the tank (1).
The vacuum evaporation process is carried out as follows.
The dilute solution (4) in the tank (5) is pre-heated by a heat exchanger 7 to provide a heated dilute solution (8). The resulting pre-heated solution (8) is converted into a mid-concentrated solution (12) in a relatively low temperature evaporator (11) heated by hot water (10) in a pipe connected to a flat-type sun collector (9). The constitution of the flat-type sun collector (9) is well known and therefore its explanation will be omitted.
The mid-concentrated solution (12) is converted into a concentrated solution (6) through high temperature evaporators (13) (14) (15) heated by collected light sun collectors. The resulting solution (6) is pumped by pump (30) and is cooled by the dilute solution (4) passing through the heat exchanger (7) and is returned to the tank (1) by way of a receiving tank (16) and pump (31). The collected light sun collectors collect solar heat with light collecting mirrors (13a), (14a), (15a). The heating temperature of the collected light sun collector is higher than that of the flat-type sun collector (9). The conventional sun collector is available for the collected light sun collectors. The light collecting mirrors heat the three high temperature vaporizers (13) (14) (15), however the number of evaporators is not limited to three. The mid-concentrated solution (12) is converted into a second mid-concentrated solution (17) in the evaporator (13), and the resulting solution (17) is converted into a third mid-concentrated solution (18) in the evaporator (14). Then the resulting solution (18) is converted into the concentrated solution (6) in the evaporator (15).
A vacuum pipe (19) connects the head portion of the low temperature vaporizer (11) with the high temperature vaporizers (13) (14) (15) and is cooled by a coagulation device (21) through utilizing cooling water. A vacuum pump (22) reduces pressure in the vacuum pipe (19). Thus the vacuum facilitates evaporation of the solution.
Air in a room (23) of a house and the like is introduced to the dehumidification room (3) through an entry pipe. Then the air is dehumidified by the concentrated desiccant solution (2) and simultaneously cooled and dehumidified by a refrigerator (25). The cooled air is returned to the room (23) of the house and the like through an exit pipe (26). If necessary, spray water is provided within the pipe (26). In addition, the room (3) may be heated, for exampl
REFERENCES:
patent: 2690656 (1954-10-01), Cummings
patent: 4164125 (1979-08-01), Griffiths
patent: 4205529 (1980-06-01), Ko
Bennett Henry
Makay Albert J.
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