JPS60138394A - Heat storage type heat exchanger - Google Patents

Abstract

PURPOSE:To sufficiently increase the heat storage and radiating capacities of the titled heat exchanger and to effectively prevent an absorbent from being pulverized and spraying by disposing porous metal bodies each accommodating the absorbent in its holes, within an absorbent accommodating case so that the metal bodies make contact with metal pipes through which a heat source fluid or a fluid to be heated passaes or with metal bodies making contact with the metal pipes. CONSTITUTION:The porous metal bodies 11 each accommodating an absorbent in its holes are formed into a cylindrical shape, and make close contact with and externally fitted in the metal pipes 5. Vapor passages are formed among porous metal bodies, and a flow passage 1 through which vapors of water or alcohol flow in and out is connected to the inside of the case 2 between diaphragms 6a and 6b. By the above described construction, heat absorption and radiation of the absorbent can be performed with a high efficiency together with vapor absorption and discharge of the absorbent. As a whole, the heat storage capacity can be sufficiently increased, and further even when the absorbent is pulverized, the spraying of the absorbent is suppressed by the holding operation of the porous metal bodies.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a system for absorbing heat from a heat source fluid by releasing water or alcohol vapor around a metal pipe through which a heat source fluid or a heated fluid passes, and for absorbing heat from the heat source fluid by releasing vapor of water or alcohol. Related to improvement of a regenerative heat exchanger in which an absorbent that generates heat as the stored heat is absorbed by water or alcohol vapor is arranged, and a flow path for water or alcohol to flow in and out is connected to a case that houses the absorbent. .

The manner in which the heat exchanger is used will be explained below with reference to FIG.

(1) During heat storage [see Figure 1 (a)] The absorbent storage case (
2), a liquid tank (
4) is connected, the absorbent (A) is heated by the heat source fluid in the metal pipe (5), and the steam in the liquid tank (4) is cooled and condensed by the heat exchanger (3). and absorbent (
The vapor released from A) flows into the liquid tank (4), and at the same time, the heat from the metal pipe (5) is absorbed by the absorbent (A).

(2) During heat dissipation [see Figure 1 (b)] The water or alcohol in the υ liquid tank (4) is heated by the heat exchanger (3), and the fluid to be heated is flowed through the metal pipe (5). The vapor in the case (2) is absorbed by the absorbent (A), and at the same time, the heat generated by the absorbent (A) is radiated.
・Heating the fluid to be heated in the metal pipe (5),
Heating or hot water supply is performed by the fluid to be heated from the metal pipe (5), or cooling is performed by the heat exchanger (3).

Conventionally, as shown in FIG. 6, a powder absorbent (A) was simply filled into the case (2), but this had the following drawbacks.

(a) The absorbent FA located far from the metal pipe (5) has poor efficiency.

(b) The average passage distance of vapor to the packed bed of absorbent (A) becomes long, and the efficiency of vapor release and absorption of absorbent (A) is poor due to increased ventilation resistance, which is combined with the drawbacks of item (a) above. As a result, the heat storage and heat dissipation capacity decreases.

(c) The absorbent (A) is likely to become powdered due to expansion due to vapor absorption, and the absorbent (A) powdered by vapor flow may easily flow into the vapor flow channel (1) or the liquid tank. .

An object of the present invention is to improve the absorbent storage structure to sufficiently increase heat storage and heat dissipation capabilities, and to effectively prevent the absorbent from powdering and scattering.

The characteristic structure of the heat exchanger according to the present invention is that a porous metal body containing an absorbent in its holes is brought into contact with a metal pipe through which a heat source fluid or a fluid to be heated passes, or a metal body in contact therewith, in an absorbent storage case. Thanks to the arrangement, its operation and effect are as follows.

Both the pick and the absorbent conduct heat to the metal pipe or the metal body in contact with it through the porous metal body with high thermal conductivity, so the absorbent absorbs and dissipates heat efficiently, and the porous metal body By adjusting the filling rate of the absorbent with respect to the pores, it is possible to ensure that water or alcohol vapor comes into contact with any absorbent quickly and sufficiently, so that vapor absorption and release of the absorbent can be carried out efficiently. I can do it,
Overall, the heat storage capacity can be sufficiently increased.

Furthermore, even if the absorbent expands or becomes powder due to steam absorption, the scattering due to the flow of steam is suppressed by the holding action of the porous metal body, and as a whole, troubles associated with absorbent scattering are sufficiently prevented for a long period of time. can.

As a result, we have worked hard to provide a regenerative heat exchanger that is compact, has a large heat exchange capacity, and can withstand long-term use, and is excellent in terms of both performance and maintenance.

Next, FIGS. 2 and 3 show examples of υ.

Partition walls (6α) and (6A) are provided in the case (2) to form a distribution chamber (8) communicating with a pipe (7) for supplying a heat source fluid or a fluid to be heated, and for discharging the heat source fluid or a fluid to be heated. A large number of metal pipes (5) are installed across both corner walls (6a) and (6h) to form a collection chamber QO that communicates with the pipe (9) and to pass the heat source fluid or the heated fluid. A porous metal body 0η containing QIJ is formed into a cylindrical shape and tightly fitted around each of the metal pipes (5) to form a steam passage between each of the porous metal bodies QIJ and to allow water or alcohol vapor to flow in and out. The flow path (1) is connected to the partition wall (6α), (6A
) is connected to the inside of the case (2), thereby forming a regenerative heat exchanger for use as previously explained with reference to FIG.

The absorbent is a solid, chloride or bromide of lithium, magnesium, calcium, iron, zinc, etc., or
Potassium carbonate, zeolite, silica gel, and other hygroscopic substances.

To store an absorbent in the pores of a porous metal body αη, techniques such as infiltrating the absorbent solution into the pores and then evaporating only the solvent can be used, but it is still necessary to adjust the filling rate of the absorbent. To,
Techniques such as adjusting the concentration of the absorbent solution can be used.

Next, another embodiment will be described.

When placing the metal pipe (5) and the porous metal body 0η in the case (2), for example, as shown in FIGS. 4 and 5,
A large number of metal pipes (5) connected at both ends to the distribution pipe (6) and the collection pipe section are arranged in a zigzag pattern inside the case (2), and each of the metal pipes ( 5), and various other configuration changes are possible.

Bringing a metal body such as a heat transfer fin into contact with the metal pipe (5),
A porous metal body αυ may be brought into contact with the metal body.

It may be configured such that water or alcohol is condensed within the case (2) and supplied to the liquid tank, or water or alcohol from the liquid tank is vaporized within the case (2).
Therefore, the channel (1) may allow water or alcohol to pass therethrough in liquid form.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing how the heat exchanger is used. FIG. 2 is a sectional view showing an embodiment of the present invention, and FIG. 8 is a sectional view taken along line mm in FIG. FIG. 4 is a sectional view showing another embodiment of the present invention, and FIG. 5 is a view taken along the line V--V in FIG. 4. FIG. 6 is a sectional view of a conventional example. (1)... Outflow and inflow channels, (2)...
Case, (5)...metal pipe, aυ...metal porous body. Agent Patent Attorney Shufue Kitamura 2125 Figure 3 Figure 4 et al.

Claims (1)

[Claims] Heat from the heat source fluid is absorbed by the release of water or alcohol vapor around the circumference of the metal pipe (5) through which the heat source fluid or the heated fluid passes, and the heat stored by the heat absorption is transferred to the water or alcohol. A regenerative heat exchanger in which an absorbent that generates heat as vapor is absorbed is arranged, and a flow path (1) through which water or alcohol flows in and out is connected to a case (2) that houses the absorbent, a porous metal body θ containing the absorbent in its pores;
υ is arranged in the case (2) so as to be in contact with the metal pipe (5) or a metal body that contacts it.