JPS5824791A - Whole heat exchange method - Google Patents

Abstract

PURPOSE:To enhance the whole heat exchange capability by a method wherein the sensible heat is rapidly exchange and at the same time the heat released when the moisture in the air is adsorbed by moistuer absorbing material, resulting in preventing the adsorbed amount from lowering due to the temperature rise caused by the adsorption of moisture. CONSTITUTION:A whole heat exchanger 1 is partitioned into fluid passages A and B with a partitin body 2, through which at least one heating member 3 fixed with moisture absorbing materials 4 is provided across both the fluid passages A and B. At the operationI, wet fluid a is led into the flow passage A, while fluid b, the temperature of which is different from that of the fluid a, is led into the flow passage B so as to form contraflow between the two fluids a and b by operating a motor 7 in order to heat-exchange the total heat through the heating member 3. In succession, at the operation II, the fluid b is led into the flow passage A, while the fluid a is led into the flow passage B so as to form contraflow between the two fluids a and b by operating a motor 11 in order to heat-exchange the total heat through the heating member 3. The operationsIand II are repeated in order.

Description

[Detailed description of the invention] The present invention relates to a residual heat exchange method for exchanging the total heat (sensible heat and latent heat) of eight types of fluids (&) and (b) that have a vital heat amount. A total heat exchanger is used as an exchanger that exhausts dirty air, takes in fresh air, and recovers sensible heat and latent heat. A conventional fibrous base material is processed into a sheet shape, and in order to provide dehumidification performance, lithium chloride is supported on this sheet, and this is shaped into a cylinder to form a heat exchange element, and an am is provided in the center. It is divided into 8 parts, and air with different total heat amount (high temperature air and low temperature low humidity air) is introduced into each part.
Total heat exchange is performed by rotating the heat exchange element.

Here, the air on the high-temperature, high-humidity side is heated, the sensible heat of the total heat of the air is stored in the heat exchange material, and the moisture in the latent heat air is deposited on the heat exchange element, while the air on the low-temperature, low-humidity side For example, the heat exchange element changes from the high temperature side to the low temperature lII/Cl15
When it turns once, it is heated by the heat accumulated in the heat exchange element, and as the temperature rises, the relative humidity decreases, so the adsorbed moisture is transferred to the air, and residual heat is exchanged.

However, such total heat exchangers are unsatisfactory and have the following disadvantages: (1) Sensible heat and moisture adsorption on the hot wire heat exchange material on the high-temperature, high-humidity air side. As heat is accumulated, as the temperature of the heat exchange element rises, the temperature of the air that should be removed also becomes high.As a result, the sensible heat exchange capacity decreases and the temperature of the air increases on the high temperature and high humidity side. If this happens, the relative humidity will decrease, leading to a decrease in the amount of adsorption.

On the other hand, as another example of a total heat exchanger, there is one in which two fluids having a total amount of heat are brought into contact with each other through a moated porous body, and sensible heat and moisture in the air are directly exchanged through the porous body.

However, this exchanger is also not practical. In order to prevent the direct passage of air, the hygroscopic porous material is thickened to reduce the diffusion and movement speed of moisture in the porous material, and on the other hand, to obtain a thin ≠ hygroscopic porous material. It has the drawbacks of being weak in strength and high in cost.

The present invention was obtained as a result of intensive research to eliminate the above-mentioned drawbacks, and the present invention has a fluid flow path (mu), (1) which is separated by a partition, and which extends through the partition and straddles both flow paths. at least one heat transfer member is disposed, and the heat transfer member is provided with W.
When using a total heat exchange device in which a damping material is fixed, a dampening fluid (1) is introduced into one fluid flow path (mu), and a fluid (&) having a different temperature from the fluid (&) is introduced into the other flow path (1). 'b) is introduced in a countercurrent state and all heat is exchanged via the heat transfer member (1);
B) Jtc This is a residual heat exchange method in which operation (1) of introducing the above fluid (,) in a countercurrent state and exchanging residual heat via a heat transfer member is repeated in sequence.

According to the method of the present invention, sensible heat is quickly exchanged, and at the same time, the heat generated when moisture in the air is deposited on the adsorbent or the absorbent material is also exchanged and eliminated, and the temperature rises during adsorption. The accompanying decrease in adsorption amount can be prevented and the total heat exchange capacity can be improved.

The present invention will be explained below with reference to the drawings. ◎ Fig. 1 shows a total heat exchange device used in the present invention ◎Heat transfer member 3
A fin 6 may be attached to the heat transfer member sk to which a moisture absorption material number is fixed, and the moisture absorption material number may be attached directly to the heat transfer member 3, or the fin a/glue may be attached to the heat transfer member sk. Yo-
. The wall 6 separates the indoors and outdoors, and is
When it rotates, 7 an a (sa, ab) moves, and duct 9 takes in 1 la outdoor air from 9'b into the room, and at the same time, duct) 10 discharges indoor air from 10 m to the lob @ When motor 11 is rotated Fan l lazy (ll &
, 11m5) moves, and in duct 9 tbW from 9&:,
10 in 10
From November 11th onwards, outdoor air will be brought into the room.

In addition, the heat transfer member used in the present invention is preferably a heat pipe or a heat transfer tube containing a metal hydride inside. It transfers heat, and when used for air conditioning, the temperature range is usually from -10°C to 40'°C, so the working fluid used is 7 Leon, liquid ammonia, methanol, water, etc. The diameter and length of the beat pipe can be appropriately selected depending on the heat exchange capacity. When one end of such a heat pipe is heated, the working fluid inside evaporates,
It moves to the other end, condenses, generates condensation heat, and is used for heat exchange. On the other hand, a metal hydride heat transfer tube contains a metal hydride and hydrogen gas therein, and heat is transferred by utilizing the hydrogen gas releasing and occluding action of the metal hydride. When one end of this heat transfer tube is heated, the activated metal hydride inside releases hydrogen gas, which moves to the other end and is occluded to generate stored heat, which is then used for heat exchange. The metal hydrides used are za-it gold alloy Mm-11#M11 alloy% Mm-Mi-Oo gold alloy Mu-Ni-mu1 alloy,
Mm-11 alloy, Oo-Mu-Xi alloy, a〇-Xia 1 alloy, 1-Ding 1 alloy, and Ti-Mu gold alloy are listed. These are hydrogenated to activate and filled into pipes for transmission. A heat tube is created. In addition, in order to enable the use of the above-mentioned alloys in the temperature range, it is possible to use a mixture of 21 or more types of alloys that exhibit high dissociation pressure. ti, m fibrous Wk wet material is preferred. For example, tflll fibrous activated leg-shaped activated carbon is fibrous activated carbon supported with deliquescent salts, porous glass fibers, and/or porous glass supported with deliquescent salts. Fibers, hydrophilic fibers and/or hydrophilic fibers coated or impregnated with hygroscopic polymers or deliquescent salts, but particularly preferred are fibrous activated carbon (or fibrous activated carbon, or hydrophilic fibers coated with or impregnated with hygroscopic polymers or deliquescent salts). These are knitted and woven fabrics, non-woven fabrics, etc., which are made from salt-carrying materials as the main material. And the fibrous activated carbon has a benzene equilibrium adsorption amount of 20011
It is preferable that the raw material fiber is 9/1 or more.
Materials such as ball fiber, recycled cellulose fibers, Meribiel alcohol fibers, acrylic fibers, polyamide fibers, etc., which are made of natural 7W-lace fibers such as cotton and hemp, and are treated with disaster-resistance agents as necessary. It is advantageous to carbonize the material after containing it, and then activate it at a high temperature. In addition, carbon fiber alone does not have sufficient strength, so polyethylene, polypyrene, polyacrylate nitrile, glycerin alcohol, #IIp thermoplastic staple fibers, or glass 1! It is mixed with non-thermoplastic short fibers such as wood pulp to form a sheet. The content of the fibrous activated carbon is preferably R6 to 9B weight arc 0, and in order to support the water-absorbing salts, the sheets are soaked in an aqueous solution of lithium chloride or the like and then dried. For example, z o %
After soaking in the z1ox solution, water is removed by centrifugation, etc., and then dried. - The amount of Li01 rejected is preferably 10% or less of the amount of water adsorbent, and if it is larger than this, Diol will separate during use. Next, we will discuss a specific example of the residual heat exchange method using the total heat exchange device according to the present invention.0 When used in winter; when the mower 1 is operated, the dirty high-temperature moist gas in the inner hook is released. Data in FIG. 1) is introduced in the direction 101# from loa. When moist gas touches a heat transfer member (in this case, a heat pipe is used) for 3 km, the moisture in the air
The working fluid inside the heat pipe evaporates due to the action of the stage heat (latent heat) generated at this time and the sensible heat of the air, moves to the other end of the heat pipe, condenses, and generates condensation heat. occurs. This heat is supplied with outdoor air (cold air) k which is transferred from 9k to 9&km and total heat exchange takes place.

The dirty air inside the room is ventilated, and on the other hand, the heat inside the room is not carried out outside, but the total amount of heat is brought back into the room. ・When this residual heat exchange operation (1) continues for a certain period of time, [the amount of moisture adsorbed by the W material increases] Since the equilibrium is IIc, in this case, the motor 1 is stopped and the motor 11 is operated. As a result, the humid gas inside the room is introduced from the duct 9 & in the direction 913. When moist gas comes into contact with the heat transfer member JIK, the moisture in the air is transferred to @member 4*
It will be worn. Due to the action of the latent heat generated at this time and the sensible heat of the air, the working fluid inside the heat pipe evaporates, moves to the other end of the heat pipe, and condenses, generating heat of condensation. heat ray data)
It is given to the outdoor air introduced in the direction from the lob to the loa, and a total heat exchange is performed. Dirty air inside the room is ventilated, and on the other hand, the heat inside the room is not taken outside, but the total amount of heat is brought back into the room.0 When this total heat exchange operation (1) continues for a certain period of time, the amount of moisture adsorbed by the g & wet material increases. Since equilibrium is reached, the motor 11 is stopped and the motor 7 is operated. Hereinafter, the above-mentioned total heat exchange operations (1) and (1) will be sequentially repeated. When the me gas contacts the heat transfer member 3, moisture in the air is adsorbed by the rIk damping material 4. Due to the action of the heat of adsorption (latent heat) generated at this time and the sensible heat of the air, the working fluid inside the heat pipe evaporates, moves to the other end of the heat pipe, and condenses, generating heat of condensation. The heat involved is data) lo
It is given to the dirty indoor air (cold air) introduced from a to the LO'b direction, and total heat exchange is performed. Dirty air inside the room is ventilated, while all the heat is carried outside again without being carried into the heat treatment room. This residual heat exchange operation (1
) progresses for a certain period of time, the amount of moisture adsorbed by the depth material reaches equilibrium, so in this case, the singing 7 is stopped and the motor 11 is operated. This is K) The high temperature and humid gas outside is the data in Figure 1)
It is introduced from lb to loa direction. When the moist υ gas comes into contact with the heat transfer member 3, moisture in the air is adsorbed by the teaching material 4. Due to the action of the latent heat generated at this time and the sensible heat of the air, the working fluid inside the heat pipe evaporates, moves to the other end of the heat pipe, and condenses, generating heat of condensation. All of the resulting heat is exchanged with the dirty indoor air introduced from the duct 91 in the 91 direction. The dirty air inside the room is ventilated, while the heat from outside is not brought into the room, and all the heat is carried outside again. When this total heat exchange operation (1) proceeds for a certain period of time, the amount of moisture adsorbed by the moisture absorbing material reaches equilibrium, so in this case, the motor 11 is stopped and the firefly tuff is operated. Thereafter, when the above-mentioned preheat exchange operations (1) and (1) are repeated in sequence, k is obtained.

The total heat exchange method of the present invention has a high sensible heat exchange efficiency.
In addition, the heat generated when the moisture in the air comes into contact with the WK wet material IIcg& is quickly transferred to the other fluid, so the moisture adsorption ability is improved, and as a result, the latent heat exchange ability is good.

[Brief explanation of the drawing]

Figure 1 shows a schematic diagram of the total heat exchange device used in the present invention.
It is. l For the low heat exchanger: partition body 38 heat transfer member 4: li [material! I:) In 6: Partition wall 'F, lλ84-ta a, xgs7 Anne 9*LO: Duct

Claims (1)

[Scope of Claims] (1) A fluid flow path (ml) is divided by a partition, and at least one heat transfer member is disposed passing through the partition and spanning both flow paths k. Using a residual heat exchange device in which a moisture absorbing material is fixed to the heat transfer member-1
A fluid (Ki) is introduced through the fluid channel (M), and a fluid ('b) having a temperature different from that of the original fluid &) is introduced in the other flow channel (B) in a countercurrent state to form the heat transfer member. Operation (1) of exchanging total heat through the fluid flow path (mu) k and the above fluid ('b)
and the operation (1) of introducing the fluid (&) in a countercurrent state to the other flow path (ml) and exchanging residual heat through the heat transfer member (returning the heat exchanger) sequentially. (2) The residual heat exchange method according to claim (1), which uses a pipe as a heat transfer member. (8) A metal hydride is incorporated inside as a heat transfer member. A total heat exchange method according to claim (1) using a heat exchanger tube.