JPS60120192A - Heat pipe device - Google Patents

Abstract

PURPOSE:To switch heating and heat retrieving automatically without operating a valve or the like and accompanying heat loss accompanied by the switching when a temperature turns into preset range by a method wherein two pieces of thermo-siphon type heat pipes are connected through a double tube to make heat exchange surfaces for heat retrieving and heating. CONSTITUTION:Two pieces of thermo-siphon type heat pipes 1, 2 are connected through a double tube structure 3A to utilize the lower part thereof for heating and the upper part thereof for heat retrieving while the inside thereof are evacuated and operating liquid is sealed therein. Absorbing agent 3, necessary for heating and heat retrieving, is loaded around the double tube structure 3A. The lower part of the heat pipe 1 is provided with a heat exchanging vessel 6 capable of effecting heat exchange between fluid 4 for heating while the upper part of the same is provided with the heat exchanging vessel 7 capable of effecting heat exchange between the fluid 5 for heat retrieving. Respective heat pipes have structures well known as thermo-siphon type.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat pipe device, and more particularly, to a heat pipe device, and more particularly to a thermosiphon type heat valve and a heat pipe using the heat pipe and an adsorbent. The present invention relates to a heat pipe device that constitutes a heat pump for use.

Generally, the operation of a heat pump can be divided into two modes. Naturally, the vapor of the working fluid is adsorbed onto the adsorbent.
Then, the temperature of the adsorbent rises, and heat is recovered at this temperature (temperature raising (or adsorption)), and regeneration (or desorption) is performed in which the adsorbent is heated and regenerated. )Mo)゛.

In general, when the temperature rises to /11 (, (adsorption)), the evaporator and adsorbent that are heated with a relatively high heat source such as solar heat (/11.. The vapor evaporated in the evaporator is adsorbed by the adsorbent, and is released due to the heat of adsorption. In the regeneration (desorption) mode, the adsorption tower and condenser are connected, and one adsorbent is heated by a relatively low-temperature heat source such as solar heat. The working fluid is desorbed and recovered by condensation in a condenser at a lower temperature.

In this way, the adsorbent used in the heat pump needs to exchange heat with the high-temperature heat recovery fluid in the adsorption mode, and with the lower-temperature heat source for re-bamboo regeneration in the desorption mode.

As mentioned above, in equipment where it is necessary to perform two operations, heating and removing, depending on the case, conventionally, two heat exchangers are installed and used separately depending on the case, or one heat exchanger is used. A method has been adopted in which the fluid flowing therethrough is switched between heating and heat removal purposes.

However, with this method, (1) it is necessary to constantly monitor the condition of the equipment, such as temperature, in order to determine when to switch over, and (2) there is a need to constantly monitor the condition of the equipment, e.g. (3) In particular, when the purpose is to recover heat, such as in a heat pump, there is a risk of temperature change in the heat exchanger and its internal fluid caused by switching. (4) In particular, in the case of a packed bed of solid adsorbent, mixing is impossible, so heating and heat removal must be performed through a conductive surface. In this case, mixing of the heating fluid and the heat removal fluid due to switching is unavoidable, and when applied to a P1-pump, there are problems such as a significant drop in efficiency.

The purpose of the present invention is to eliminate the drawbacks of the prior art as described in the following. K.A.
A single heat transfer surface for both heating and heat removal that automatically switches between heating and heat removal when the temperature reaches a certain range 1111 without operating a valve or the like and without any heat loss associated with switching. By providing a heat pipe having a heat pipe and using this heat pipe, high temperature fluid/heat can be pumped from a relatively low temperature heat source by opening and closing a valve without using power. The object of the present invention is to provide a P1-pump that can be pumped up and down.

The first aspect of the present invention is that the upper condensing part of a thermosiphon type heat pipe is an inner pipe, and the lower evaporating part of another thermosiphon type heat pipe installed in the inner pipe is an outer pipe. A set of thermosiphon heat pipes connected by a double pipe, with wicks provided on the inner surface of the outer tube and the outer surface of the inner tube to serve as heat exchange surfaces for heat recovery and heating, respectively. It is characterized by

The second aspect of the present invention relates to a heat pump using the above-mentioned P1-pipe, in which the above-mentioned top pipe and the two-liter pipe section of the P1-pipe are inserted into the user part of the adsorbent. an adsorption tower, an evaporator and a condenser for the working fluid, a passage and an on-off valve for supplying the working fluid evaporated in the evaporator to the adsorption tower; 1): the working fluid desorbed in the adsorption tower; a passageway and an on-off valve for supplying working fluid to the condenser;
It is characterized by comprising a working fluid passage and an on-off valve that connect the evaporator and the condenser.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is an explanatory diagram of a pipe according to the present invention. In the figure, the heat pipe mosaic type A heat pipes 1 and 2 are connected to the double pipe structure part 3.
The heat pipe 1 at the bottom is for 9mm, and the heat pipe 2 at the top is for 9mm. For Atagawa. A fin 11 is provided on the outer periphery of the heat exchange portion of the heat I pipes 1 and 2, and the inside thereof is evacuated to a vacuum and a working fluid is poured into it. City pipe structure part 3
The area around A is filled with an adsorbent 3 that requires heating or heat removal. The lower part of the heat pipe 1 has an inlet and an outlet for the heating fluid 4 so that heat can be exchanged with the heating fluid 4.
A heat exchange vessel 6 having a heat exchanger L-1 is provided. Similarly, a heat exchange container 7 having an inlet 1 and an outlet 1 for the heat removal fluid 5 is provided at the upper part of the heat pipe 2 so that heat can be exchanged with the heat removal fluid 5. That's Koma's Heatpa.
Eve has a structure known as a thermozaiphon type. However, for heat pipe 1, -1: 7
A wick 12 is attached to the inner surface of the evaporator section 1Δ of 71~, and the working fluid is inserted into the wick 12 so as to wet the evaporator section all over, but there is no condensation on the part. A wick is not attached to the inner surface of section IB. Therefore, when using this type of heat pump in an almost vertical position, the lower evaporation section I with the wick
Heat flows from A to the upper condensing section IA, but
The opposite flow does not occur, so-called one-way flow of heat is realized. Also, regarding the heat pipe 2, the evaporation section 2B
The wick 12 is removed only on the inner surface of the
Since there is no groove on the inner surface of the upper condensing section 2A, one-way flow of heat is similarly achieved.

Next, the operation of the heat pipe will be explained.

Let the temperature of the heating fluid 4 be TI, the temperature of the heat removal fluid 5 be T2, and the temperature of the adsorbent be T3. This heat pipe is suitably used in cases where the purpose is to recover heat at high temperatures, such as in a heat pump, so generally T1 < T.
2. Now, the temperature of the adsorbent is low and T
If 3<TI, only the lower heat pipe 1 operates. In other words, the working fluid evaporates in the wick part 12 of the lower Hagi originating part IA, condenses in the upper condensation part (inner pipe part of the double pipe) IB, and falls, so that the working fluid flows from the lower part of the heat pipe 1 to the inner pipe of the double pipe. Heat is transferred to part IB. In addition, from the inner tube part IB of this double tube to the outer tube part 2B, the working fluid evaporates from the wick on the outer surface of the inner tube, and the working fluid evaporates from the wick on the outer surface of the inner tube. The heat is transferred each time the heat is condensed in the wick and then refluxed again to the wick on the outer surface of the inner tube due to capillary action. In the end, heat flows from the heating fluid 4 to the adsorbent 3 through the heat pipe 1 and the double pipe section 3A. At this time, the upper top pipe 2 does not operate due to the thermosiphon principle. Moreover, this heat flow is T 3 > T1
It will stop automatically.

Temperature of adsorbent 3 is between T1 and T2, 4- is T1
< T 3 < T2 Nothing happens due to the principle of thermosiphon, but the temperature of the adsorbent rises to T
When 2 <1' 3, the -1- heat pipe 2 is activated, and heat is recovered from the adsorbent 3 to the heat removal fluid 5. Z (i.e., the lower evaporation part 2 of the heat pipe 2
H0) The working fluid evaporates in the wick 12, condenses and falls in the -L group T condensation part 2Δ, and heat is transferred from the lower part 3A of the heat pipe 2 to the -F part 2A, and the inside of the heat exchange container is The heat is recovered to the heat removal river fluid 5. At this time, since the lower heat pipe 1 does not operate according to the thermosiphon principle, heat is selectively recovered to the heat removal fluid 5. When the temperature of the adsorbent falls such that T3<72, this heat recovery is automatically stopped +h.

As mentioned above, the heat pipe according to the present invention uses gravity type heat pipes and 2 in combination with a wick type double pipe heat pipe, so that heating and heat removal can be achieved at temperatures r1 and T2. Heating can be carried out automatically depending on the value, heating can be carried out selectively by a low temperature heat source (e.g. solar heat), and heat recovery can be carried out selectively by a hotter fluid, since the recovered heat does not flow back into the cold part. , it can be suitably used as a heat exchanger for heat pumps.

In FIG. 1, the fins 11 provided on the outer periphery of the shield pipe 1.2 are optional and may be provided as necessary. Also, the double pipe section 3A connecting the peel l-pipe 1.2
In this case, the -L section of the heat pipe 1 forms the inner pipe, the lower part of the heat pipe 2 forms the outer pipe, and the lower end of the double pipe part is closed. A modified version may be used as long as heat can be transferred from the inner tube part 113 to the outer tube part 2B or the absorbent 3 outside thereof. Furthermore, the heat exchange means for heating and heat removal below ``1'' of the connected heat pipes is not limited to the indirect type shown in the drawings as long as it can be exchanged.

Although the H-I pipe of the present invention is limited to application to the P-1 pump using an adsorbent, which will be described later, there is no εJ,
It can be applied to equipment that needs to perform power removal at low temperatures and heat removal at high temperatures in a range <-L+'i.

Next, FIG. 2 is an explanatory diagram showing an embodiment of a heat pump using the heat pipe of the present invention.

The basic configuration of this heat pump system is 1 adsorption system containing 20 adsorbents. It consists of an evaporator 21, a condenser 22, a working fluid passage connecting them, and valves 23, 24, and 25 that can open and close each of them. Everything in this system is evacuated and filled with working fluid 17 (water in this case). Inside the adsorption tower 20, -1-
Heat pipes 1 and 2 are created in which the double pipe part 3A, which is the connecting part of both heat vibrators, is connected as a heat transfer surface, and the upper part 2△ and lower part IA of the heat pipe 1.2 are as follows. As described above, the structure allows heat exchange with the heat removal fluid 5 and the heating fluid 4, respectively. Adsorption tower 20
An adsorbent 3 such as activated carbon is sealed inside.

The evaporator 21 consists of a closed container and has a relatively low temperature heat source 1.
3, and a working fluid 17 that adsorbs and desorbs the above-mentioned adsorbent is sealed therein. This working fluid 17 may generally be different from the working fluid used in the pipe 1. heat#
In this case, a coil 14 through which the heat source fluid 13 flows is shown as a structure capable of exchanging heat with the evaporator 13, but a jacket through which the heat source fluid flows may be provided around the evaporator 21. Note that the heat source fluid 13 may be the same as or different from the heating fluid 4 that heats the heat pipe lower portion IA.

Next, the condenser 22 also consists of a closed container, and like the evaporator 21, a coil 16 through which the external fluid 15 flows is provided inside. In the case of a vacuum cleaner, a cooling jacket 1 to 1 may be installed around the condenser instead of the coil 16 to provide a saw structure.

The adsorption tower 20, the evaporator 21, and the condenser 22 are connected to each other by a passage through which the working fluid passes, and each passage is provided with an on-off valve 2 for controlling the flow of the fluid as described above.
3.24 and 25 are provided.

A method of operating the pump constructed in this manner will be described below.

Operation 1 (temperature increase mode) Now, when valve 23 is opened with valves 24 and 25 closed, the vapor of the working fluid generated/nidized in the evaporator 21 flows to the adsorption tower 20, where it is adsorbed by the adsorbent. However, the temperature of the adsorbent rises due to the heat of adsorption released at that time. When you
By appropriately selecting the temperature of the evaporator 21 (4), the temperature T3 of the adsorbent can be set to be higher than the temperature T2 of the heat removal fluid 5, and T2≦T3. In this way, as explained in the section on the operation of the heat pipe, heat flows from the adsorption tower 20 to the heat removal river fluid 5, and heat recovery at high temperatures is performed.

Operation 2 (Regeneration mode) After opening operation 1 continues for a certain period of time, when the valve 23 is closed and the valve 24 is opened, the adsorption tower 20 is connected to the low-resolution condenser 22, and the working fluid is removed from the foil absorbing agent. is desorbed and the generated vapor enters the condenser 22 and is condensed.

At this time, the temperature decreases because the adsorbent absorbs the heat of desorption. By appropriately selecting 61d1 degrees 15 of the 61d navy blue of the vessel 22, the temperature T3 of the adsorbent is set to be lower than the temperature T1 of the heating fluid 4, that is, T3≦T1. be able to. In this way, as explained in the operation of the heat pipe, the thermal fluid 4 flows to the adsorption tower 20 and heat for desorption continues to be supplied, so that the working fluid is desorbed from the adsorbent. The adsorbent is regenerated.

Operation 3 (Adjustment of Working Fluid) By performing operation (1) and operation 2, the working fluid 17 in the evaporator 21 decreases and the working fluid in the condenser 22 increases. Therefore, when the working fluid in the condenser 22 reaches a certain level, the valve 25 is opened, the working fluid in the condenser 22 is returned to the evaporator 21, and the level is adjusted eight times.

By repeating the above series of operations, the heating fluid 4
Heat flows from the evaporator 21 to the condenser 22, and at the same time, heat can be pumped up from the evaporator 21 to the heat removal stream 5. Therefore, this heat pump can pump heat from the heat source (temperature T4) that heats the evaporator 21 to the fluid 5 at a higher temperature T2 without using any power. Of course, ordinary heat pumps require power from a combination generator or the like to pump up heat, but the present invention does not require such power. To explain the reason thermodynamically, in the present invention, the portion corresponding to this power is transferred from the heating fluid 4 in the regeneration mote to the condenser 22.
This can be interpreted as being covered by the flow of heat to.

Examples of the adsorbent used in the present invention include activated carbon, zeolite such as monoregular sieves, silica reel,
In addition to so-called solid adsorbents such as 11-alumina, bone char, hennite, acid clay, and hydrogen-absorbing metals, liquid absorbents such as solutions of organic and inorganic substances can also be used. The working fluid may also exhibit heat generation/endotherm when adsorbed/desorbed or absorbed/dissipated by these adsorbents or absorbents.
For example, water, an organic solvent or a mixture thereof can be used.

In the above operation 1.2, how to set the temperatures T4 and T5 for the heat pipe of the 41 invention to operate effectively.
Therefore, the case where activated carbon is used as an adsorbent will be explained below.

FIG. 3 is a typical activated carbon adsorption contour.

The vertical axis is the adsorption HkqCg/g], and the horizontal axis is the phase λ1 pressure p/P (
T) [~]. Here, p is the partial pressure of the working fluid that the adsorbent exhibits at temperature T with the shield amount q, and P(T) is the saturation pressure that the pure working fluid exhibits at temperature T. Now, in operation 1, in order for the working fluid to be adsorbed on the adsorbent, p
It is sufficient if the value of /P(T3) is in the region (a) in the figure, and p
=P(T4), and since T3 and T2 are approximately equal, the salinity of the evaporator T4 may be determined so that P (T4)/P (T2)>A. Here, A is the relative pressure at the 112 points of the adsorption isotherm. In addition, in step 2, in order for the adsorbent to desorb, it is sufficient that it is in the region of p/P (T3) or (b) in the figure, and since p = P (T5) and T3 and T1 are almost equal, the condenser The temperature T5 is P'(T5) /P (T゛l
) <8.

Next, the present invention will be further explained in detail with reference to Examples.

Example 1 The specifications of the heat pipe used are shown below.

Pipe Tsukikoma-i Circular diameter 20 parts Thickness JV l Total length 55 parts mm Length of double pipe part 150 mm Inner pipe diameter of double pipe 10IIIWl Width material Stainless steel Number of wire mesh layers 3 layers Fixing method Length fixed with spring Lower heat pipe 100 mm Upper heat pipe 150 mm Fin (double tube section only) Material Aluminum Diameter 45 mm Pitch 3 Length 250 Dragon Working fluid Water Amount of working fluid 20 cc each This heat pipe 1 =, middle, bottom Directly cut the three parts for ￥2
Each container was sealed in a brass cylindrical container made of 00 Dragon, and water at different temperatures was poured into each container, and the flow rate of each water and the temperature at the inlet and outlet were measured. An example of temperature combinations is shown below.

The results of calculating the heat flow flowing through heat pipes 1 and 2 from the flow rate of water and the temperature difference between the inlet and outlet are shown below.

From this result, 'rI < T 3 < of experiment number 1.
When T 2, neither heat pipe operates, and when T 3 <i' I < T 2 of Experiment No. 2, only the lower heat pipe 1 selectively operates, and when T ] < T of Experiment No. 3. When ``2 < T 3'', only the two-part heat pipe ``2'' operated selectively, and good results could be obtained.

Example 2 Granular activated carbon was filled into the gap between the fins in the middle of the P1-pipe used in Example 1, and the surrounding area was covered and fixed with a wire mesh. A set of three such H-I pipes was sealed in three brass cylindrical containers, the upper, middle, and lower, in the same manner as in the previous example. Water was allowed to flow through the lower part of the cylindrical container in the same manner as in the previous example, and the flow rate and temperature were measured. A glass evaporator and condenser were connected to the intermediate cylindrical container via a glass cock.

The evaporator has a cylindrical shape with a diameter of 40 mm and a length of 150 mm.
It has a structure that allows it to be heated by attaching Shakeno 1- to the surrounding area and pouring hot water over it, and it is installed horizontally.

The condenser has a cylindrical shape with a diameter of 40 m@' and a length of 150 mm, and is installed almost vertically in the cold water, so that the amount of condensed water can be visually measured from the height of the liquid level.

q% > 40°C hot water is poured into the evaporator and the lower container of the Hee I pipe as a heat source, and 20°C is used as a low-temperature heat source.
of cold water was flowed around the condenser. After repeating operation 1.2 above while varying the temperature of the heat recovery fluid flowing into the Bee 1-Pa 411 container, it was found that the heat I was able to find a second answer. Especially if the temperature of the heat recovery fluid is around 47℃,
By the above series of operations, about 240 c/g of activated carbon
The effectiveness of the present invention was confirmed by being able to absorb the heat of al.

According to the present invention, by using a structure in which two heat pipes are connected through a double pipe section, it is possible to set the temperature conditions of two heat pipes only, and no valves or other control means are required. It is possible to selectively operate any one of the pipes without any effort, and the combination of such pipes with adsorption towers, evaporators, and condensers requires power means such as compressors. It is possible to create a heat pump that has a simple structure and is excellent in operability, maintenance, etc., without any problems.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an embodiment of the heat pipe of the present invention, Fig. 2 is an explanatory diagram of the P1-pump system according to the present invention, and Fig. 3 is an adsorption contour diagram of activated carbon. It is. DESCRIPTION OF SYMBOLS 1... Lower heat pipe, 2... Upper heat pipe, 3... Adsorbent, 3A... Double pipe part, 4... Fluid for heating, 5... Fluid for heat removal, 11 ...Finn, ]7
... Working fluid, 20 ... Adsorption tower, 21 ... Evaporator, 22 ... Condenser, 23.24.25 ... Valve. Agent Patent Attorney Takenaga Kawakita

Claims (2)

[Claims] (1) The upper condensing part of the thermosiphon type heat pipe is the inner tube, and the lower evaporating part of another thermosiphon type heat pipe installed above it is connected by a double tube. A heat pipe device having a set of thermozyphon type heat pipes 1 to 1 with the condensing section and the evaporating section serving as heat exchange surfaces for heat recovery and heating, respectively. (2) Thermal mosaic-on type heat pipe and the P1-
An adsorption tower in which a double pipe section of a pipe is inserted into an adsorbent enclosure part, an evaporator and a condenser for a working fluid, a passageway and an on-off valve for supplying the working fluid evaporated in the evaporator to the adsorption tower. A heat pipe characterized by having a passage and an on-off valve for supplying the working fluid desorbed in the adsorption tower to the condenser, and a working fluid passage and an on-off valve that connect the evaporator and the condenser. Device.