JP3336539B2 - Dehumidifier and dehumidifying air conditioner using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehumidifier operating by using waste heat of a boiler or the like and a dehumidifying air conditioner using the same, and more particularly to a highly efficient dehumidifier even when the waste heat is low. And air conditioning.

[0002]

2. Description of the Related Art A dehumidifying air conditioner dehumidifies outside air by adsorbing or absorbing the humidity of outside air, produces dry air, and cools and supplies it. Such dehumidifying air conditioners do not use chlorofluorocarbon, and use heat as a driving energy source, so they can use a variety of energies such as gas combustion heat, exhaust heat, or solar heat, thereby reducing carbon dioxide emissions. It has many features, such as the ability to reduce power peaks in summer.

A conventional dehumidifying air conditioner will be described with reference to FIG. Reference numeral 1 denotes a blower that sends atmospheric OA to an adsorption zone 3 of a dehumidifying rotor 2. As a result, the air increases in temperature and becomes dry air. Here dehumidifying rotor 2
Is made by carrying a hygroscopic agent such as silica gel or zeolite on paper formed in a honeycomb shape, and is rotationally driven by a motor (not shown) through a belt or the like (not shown). is there.

[0004] The air leaving the adsorption zone 3 of the dehumidifying rotor 2 passes through one of the passages 5 of the orthogonal sensible heat exchange element 4, thereby lowering the temperature of the dry air. Here, as shown in FIG. 5, the orthogonal sensible heat exchange element 4 alternates between a wave-shaped aluminum foil or synthetic resin film and a planar aluminum foil or synthetic resin film, and alternates the wave direction. It has two passages orthogonal to each other, and sensible heat exchange is performed between each passage. Further, the gases passing through the two passages do not mix with each other.

[0005] The dry air that has exited one passage 5 of the orthogonal sensible heat exchange element 4 enters a water spray nozzle 6. Water spray nozzle 6
In this technique, water is sprayed on air passing therethrough and cooled by heat of vaporization of water. The air whose temperature has dropped from the water spray nozzle 6 is supplied indoors as supply air SA.

[0006] The air RA in the room is sucked by the blower 7 and firstly enters a pipe provided with a water spray nozzle 8. Since indoor air is not generally 100% relative humidity, water is vaporized and cooled by the water spray nozzle 8.

[0007] The air cooled by the water spray nozzle 8 passes through the other passage 9 of the orthogonal sensible heat exchange element 4, and the temperature of the one passage 5 of the orthogonal sensible heat exchange element 4 is decreased and the temperature is increased. To enter the heater 10. Here heater 1
Numeral 0 denotes a gas burner for burning a combustible gas such as natural gas or propane gas or a radiator for passing hot water.
Alternatively, as long as the heater 10 is a heating means, the heater 10 may be a means such as a high-temperature exhaust gas from another combustion device or a mixed gas of the high-temperature exhaust gas and air.

The air heated by the heater 10 is
The moisture adsorbed by the desiccant of the dehumidifying rotor 2 passes through the desorption zone 11 of the dehumidifying rotor 2, and is desorbed by the blower 7 to the atmosphere as exhaust EA.

[0009]

In the conventional dehumidifying air conditioner as described above, the dehumidifying rotor 2 is attached and detached by air heated through the heater 10. In order to perform desorption of the dehumidifying rotor 2, there is a problem that the higher the heating temperature of the air by the heater 10, the higher the desorption effect, and when low-temperature waste heat is used, sufficient desorption cannot be performed, and the dehumidification performance cannot be exhibited. is there.

On the other hand, high-temperature waste heat is used in many other applications as a co-generation system, and waste heat is wasted by making use of the lowest possible temperature. Will also be available.

An object of the present invention is to provide a dehumidifying air conditioner which exhibits an air conditioning function with high efficiency by utilizing low-temperature waste heat such as boiler exhaust gas.

[0012]

In order to solve the above-mentioned problems, the present invention provides a sensible heat exchanger for exchanging sensible heat between desorption air for a dehumidifying rotor and a hot fluid from a waste heat source. The dehumidification rotor was desorbed by the heated and desorbed air that passed therethrough, and the air having the highest temperature due to the temperature distribution of the sensible heat exchanger was applied to the final portion of the desorption of the dehumidification rotor.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a sensible heat exchange means for exchanging sensible heat between air for desorption of a dehumidifying rotor and a heat fluid from a waste heat source is provided. The dehumidifying rotor is desorbed by the desorbed air heated after passing through the heat exchange means, and the air having the highest temperature due to the temperature distribution of the sensible heat exchanger is applied to the final portion of the dehumidifying rotor desorption. Because the hottest air hits the final part of the dehumidifying rotor,
Desorption degree of the dehumidifying rotor increases.

According to a second aspect of the present invention, a humidifying cooling means for humidifying and cooling air from a room, and sensible heat exchange between the humidified and cooled air from the room and air supplied to the room. A first sensible heat exchange unit, and a dehumidification rotor that adsorbs moisture in the outside air sent to the first sensible heat exchange unit and dries the outside air. A second sensible heat exchange means for exchanging sensible heat between
The dehumidifying rotor is desorbed by the return air from the room that has passed through the heat exchange means and is heated,
The air with the highest temperature due to the temperature distribution of the heat exchange means is applied to the final part of desorption of the dehumidifying rotor, and the air with the highest temperature hits the final part of the dehumidifying rotor. Due to the high degree, the supply air becomes more comfortable.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a dehumidifier according to the present invention will be described below in detail with reference to FIG. Here, the blower 1, the dehumidifying rotor 2, the adsorption zone 3, the blower 7, and the desorption zone 11 are the same as those in FIG. 7 showing the conventional dehumidifying air conditioner, and redundant description is omitted to avoid redundancy.

Reference numeral 15 denotes a second orthogonal sensible heat exchange element. One end of the second orthogonal sensible heat exchange element 15 is connected to an exhaust gas pipe 16 of a micro gas turbine. That is, heat is exchanged between the air and the exhaust gas of the micro gas turbine. FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, from which it can be seen that the exhaust gas of the micro gas turbine passes through the water heater and enters the second orthogonal sensible heat exchange element 15.

The dehumidifier of the present invention is configured as described above,
The operation will be described below. First, the blowers 1 and 7 are activated, and then the micro gas turbine is ignited. Then, the outside air OA is sucked into the blower 1 and enters the blower 1, is pushed out by the blower 1 and enters the adsorption zone 3 of the dehumidifying rotor 2. Here, the humidity of the outside air is adsorbed by the dehumidifying rotor 2,
The outside air becomes dry air and the temperature rises due to heat of adsorption.

The air passes through the second heat exchanger 15 due to the suction of the blower 7 and rises in temperature. The air enters the desorption zone 11 through the desorption passage 19 and desorbs the moisture adsorbed on the dehumidification rotor 2 to desorb the air. And is released to the atmosphere.

The above operation will be described in detail. When the room air passes through the second orthogonal sensible heat exchange element 15, it exchanges heat with the exhaust gas of the micro gas turbine to have a temperature of 60 to 90 ° C.
Rise to the extent.

The exhaust gas of the micro gas turbine is sent from one end of the second orthogonal sensible heat exchange element 15, and the temperature of one end of the second orthogonal sensible heat exchange element 15 becomes higher than the temperature of the other end. That is, when the temperature of the exhaust gas of the micro gas turbine is 100 ° C. as shown in FIGS.
The air that has passed through the orthogonal sensible heat exchange element 4 rises to 90 ° C. when passing near one end of the second orthogonal sensible heat exchange element 15, and reaches 60 ° C. when passing near the other end of the second orthogonal sensible heat exchange element 15. To ℃.

As a result, the air heated to 60 ° C. passes through the portion of the dehumidifying rotor 2 immediately after entering the desorption zone 11, and the higher temperature air passes through the end portion of the desorption zone 11. Become. Accordingly, desorption of the dehumidifying rotor 2 proceeds, and high-temperature air passes through the portion where the amount of moisture is reduced, so that desorption of the dehumidifying rotor 2 is effectively performed.

Thus, even if the temperature of the desorption air is low, the dehumidification rotor 2 is completely desorbed and the dehumidification effect of the dehumidification rotor 2 is enhanced.

Hereinafter, an embodiment of the dehumidifying air conditioner of the present invention will be described in detail with reference to FIG. Here, blower 1, dehumidifying rotor 2, adsorption zone 3, orthogonal sensible heat exchange element 4,
The one passage 5, the blower 7, the water spray nozzle 8, the other passage 9, and the desorption zone 11 are the same as those shown in FIG. 7 showing the conventional dehumidifying air conditioner, and duplicate explanations are omitted to avoid redundancy. . The orthogonal sensible heat exchange element 4 is hereinafter referred to as a first orthogonal sensible heat exchange element 4 to distinguish it from a second orthogonal sensible heat exchange element described below.

Reference numeral 12 denotes a partition plate, which divides the entrance of the other passage 9 of the first orthogonal sensible heat exchange element 4 into a non-humidifying passage 13 and a humidifying passage 14. And the divided humidification passage 14
Is provided with a water spray nozzle 8. The spray amount by the water spray nozzle 8 is set to a state in which fine particles of water float in air having a relative humidity of 100%. Here, the return air RA from the room flows through both the non-humidifying passage 13 and the humidifying passage 14.

A second orthogonal sensible heat exchange element 15 is provided between the outlet of the non-humidifying passage 13 and the desorption zone 11 of the dehumidifying rotor 2. One end of the second orthogonal sensible heat exchange element 15 is connected to an exhaust gas pipe 16 of a micro gas turbine (not shown). That is, heat is exchanged between the air exiting the non-humidifying passage 13 and the exhaust gas of the micro gas turbine. FIG. 6 is a cross-sectional view taken along line AA of FIG. 4, from which it can be seen that the exhaust gas of the micro gas turbine passes through the water heater and enters the second orthogonal sensible heat exchange element 15.

Reference numeral 17 denotes an exhaust passage, to which the outlet of the humidifying passage 14 communicates. The bottom surface of the exhaust passage 17 receives drain water. In addition, the exhaust passage 17 has an inclined bottom surface, which facilitates drainage of the condensed water accumulated therein. The outlet of the exhaust passage 17 is provided with a diffuser 18 for separating water and water, and a valve 20 for adjusting the ratio of the amount of air passing through the desorption passage 19 and the exhaust passage 17.
Is provided.

The desorption passage 19 guides heated air through the non-humidifying passage 13 and the second orthogonal sensible heat exchange element 15 to the desorption zone 11. The blower 7 sends air out of both the desorption passage 19 and the exhaust passage 18 to the outside.

The dehumidifying air conditioner of the present invention is configured as described above, and its operation will be described below.

The blowers 1 and 7 are activated, then the micro gas turbine is ignited and water is sent to the water spray nozzle 8. Then, the outside air OA is sucked into the blower 1 and enters the blower 1, is pushed out by the blower 1 and enters the adsorption zone 3 of the dehumidifying rotor 2. Here, the moisture contained in the outside air is adsorbed by the dehumidification rotor 2, the outside air becomes dry air, and the temperature rises due to heat of adsorption.

The heated dry air enters one passage 5 of the first orthogonal sensible heat exchange element 4. Here, the dry air gives its sensible heat to the first orthogonal sensible heat exchange element 4, and the temperature falls. That is, the temperature of the dry air that has exited the first orthogonal sensible heat exchange element 4 decreases due to the indoor air RA and the heat of vaporization of the water sprayed by the water spray nozzle 8, and the comfortable supply air SA
And supplied indoors.

The indoor air RA enters the non-humidifying passage 13 and the humidifying passage 14 of the other passage 9 of the first orthogonal sensible heat exchange element 4 by suction of the blower 7. Then, the gas passes through the desorption passage 19 and the exhaust passage 17, enters the suction port of the blower 7, and is discharged to the atmosphere.

That is, a part of the indoor air RA is supplied to the cooling passage 1.
4, the air in the humidification passage 14 is humidified by the water spray nozzle 8 to lower the temperature, and the water fine particles are in a floating state.

The fine particles of water are vaporized by the sensible heat of the air passing through one of the passages 5 of the first orthogonal sensible heat exchange element 4 while passing through the humidification passage 14, and take away the heat of vaporization to exhaust passage 17. to go into. As described above, only the sensible heat exchange is performed between the one passage 5 and the other passage 9 of the first orthogonal sensible heat exchange element 4 and there is no mixing of both gases. And the air in the humidifying passage 14 does not mix. Therefore, the air passing through the one passage 5 of the first orthogonal sensible heat exchange element 4 is cooled without being humidified.

The air that has entered the non-humidifying passage 13 of the other passage 9 of the first orthogonal sensible heat exchange element 4 due to the suction of the blower 7 exchanges heat with the dry air whose temperature has increased, and the temperature rises to about 50 ° C. Then, it passes through the second orthogonal sensible heat exchange element 15. At this time, heat is exchanged with the exhaust gas of the micro gas turbine, and the temperature rises to about 60 to 90 ° C.

The exhaust gas of the micro gas turbine is sent from one end of the second orthogonal sensible heat exchange element 15, and the temperature of one end of the second orthogonal sensible heat exchange element 15 is naturally higher than the temperature of the other end. That is, as shown in FIG. 6, when the temperature of the exhaust gas of the micro gas turbine is 100 ° C., the air that has passed through the first orthogonal sensible heat exchange element 4 The temperature rises to 90 ° C. when passing, and rises to 60 ° C. when passing near the other end of the second orthogonal sensible heat exchange element 15.

As a result, the air heated to 60 ° C. passes through the portion of the dehumidifying rotor 2 immediately after entering the desorption zone 11, and the higher temperature air passes through the end portion of the desorption zone 11. Become. Accordingly, desorption of the dehumidifying rotor 2 proceeds, and high-temperature air passes through the portion where the amount of moisture is reduced, so that desorption of the dehumidifying rotor 2 is effectively performed.

As described above, even if the temperature of the desorption air is low, the dehumidification rotor 2 is completely desorbed and the dehumidification effect of the dehumidification rotor 2 is enhanced.

Also, by adjusting the valve 20,
The amount of air flowing into the exhaust passage 17 can be adjusted, and the temperature of the supply air SA can be controlled by adjusting the amount of air and the amount of spray from the water spray nozzle 8. That is, the temperature of the supply air SA can be lowered by opening the valve 20 to increase the amount of air passing through the exhaust passage 17 and increasing the amount of spray from the water spray nozzle 8.

Conversely, when it is desired to increase the temperature of the supply air SA by reducing the cooling effect, the opening degree of the valve 20 is reduced and the spray amount from the water spray nozzle 8 is reduced.

In the above embodiment, the room air RA is supplied to both the non-humidifying passage 13 and the humidifying passage 14. However, if the amount of air is insufficient, the outside air is supplied to the humidifying passage 1.
4 may be supplied.

In both of the above embodiments, an example has been described in which exhaust gas passing through a hot water boiler of a micro gas turbine is used as an exhaust heat source, but exhaust gas from a direct combustion boiler can also be used. In the above embodiment, an example is described in which exhaust gas is used as a heat fluid from a waste heat source. However, a coolant or steam of an internal combustion engine may be used.

Further, an example of an orthogonal heat exchange element has been described as a stationary sensible heat exchange element, but an element having an oblique flow direction, an element having an opposite flow direction, or a fin pipe type element may be used. it can.

[0043]

According to the dehumidifier of the present invention, the dehumidifying rotor is desorbed by using waste heat from the exhaust heat source, and passes through the desorption zone according to the temperature distribution of the air that has exchanged heat with the waste heat. Since the position is set, desorption can be performed effectively even with waste heat having a relatively low temperature, and sufficiently dry air can be supplied. Therefore, it is possible to use low-temperature exhaust heat that has been difficult to use conventionally.

Since the dehumidifying air conditioner of the present invention uses a dehumidifier capable of effectively producing dry air by using the low-temperature waste heat as described above, the waste heat having a relatively low temperature is used. Can effectively perform air conditioning, and can utilize low-temperature waste heat that has been conventionally difficult to use.

In particular, since a static sensible heat exchange element is used as the heat exchanger, no moisture is brought in between the heat exchange gases, and the humidity of the supplied air can be kept low.

When the humidity of the outside air is low, humidification cooling can be added, and in this case, the temperature of the supply air can be further lowered. Moreover, since the temperature of the supply air is lowered by sensible heat exchange, the air of high comfort can be supplied without increasing the humidity of the supply air.

Further, waste heat recovery (cooling of supply air by indoor cool air) and indirect vaporization cooling are performed by dividing the area of one static sensible heat exchange element, so that the entire apparatus can be realized at a compact size and at low cost. .

[Brief description of the drawings]

FIG. 1 is a flowchart showing an embodiment of a dehumidifier of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a flowchart showing an embodiment of the dehumidifying air conditioner of the present invention.

FIG. 5 is a perspective view showing an orthogonal heat exchanger used in the dehumidifying air conditioner of the present invention.

FIG. 6 is a sectional view taken along the line AA of FIG. 4;

FIG. 7 is a flowchart showing an example of a conventional dehumidifying air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blower 2 Dehumidification rotor 3 Adsorption zone 4 1st orthogonal sensible heat exchange element 5 One passage 7 Blower 8 Water spray nozzle 9 The other passage 11 Desorption zone 12 Partition plate 13 Non-humidification passage 14 Humidification passage 15 2nd orthogonal expression Heat exchange element 16 Exhaust gas pipe 17 Exhaust passage 18 Diffuser 19 Desorption passage 20 Valve

Claims (4)

(57) [Claims] 1. A dehumidifying rotor for adsorbing and drying gaseous humidity and drying the dehumidifying rotor .
Providing sensible heat exchange means for exchanging sensible heat with the exhaust gas of the micro gas turbine that has passed through, and desorbing the dehumidifying rotor by the desorption air heated by passing through the sensible heat exchange means, A dehumidifier wherein air having the highest temperature due to the temperature distribution of the sensible heat exchanging means is applied to a final portion of desorption of the dehumidification rotor. 2. A humidifying and cooling means for humidifying and cooling air from a room, a first sensible heat exchanging means for exchanging sensible heat between the humidified and cooled air from the room and air supplied to the room, and a dehumidifying rotor dried by suction of outside air humidity to be sent to one sensible heat exchange means, reflux from room air and Yunie
A second sensible heat exchanging means for exchanging sensible heat with the exhaust gas of the micro gas turbine having passed through the heat exchanger, wherein the return air from the room which has passed through the second sensible heat exchanging means and is heated The dehumidifying rotor is desorbed, and the air having the highest temperature due to the temperature distribution of the second sensible heat exchanging means is applied to the final desorption portion of the dehumidifying rotor. Dehumidifying air conditioner. 3. The dehumidifying air conditioner according to claim 2, wherein the second sensible heat exchange means is a static heat exchanger. 4. A portion of the first sensible heat exchange means through which room air passes is divided into two regions, one of the divided regions is humidified and cooled, and the air which has passed through the other of the divided regions is divided into two regions. The dehumidifying air conditioner according to claim 2, wherein the heating is performed by a two-sensible heat exchanger.