JP2002253922A - Dehumidifier and dehumidifying air-conditioner using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dehumidifier which can exhibit sufficient performance even in the case of using the waste heat from a boiler, a micro gas turbine power generator having a boiler and the like, and to provide a dehumidifying air-conditioner using the same. SOLUTION: The waste heat from a micro gas turbine power generator which generates high temperature and low temperature waste heat, is used. A sensible heat exchange means 7, which performs a sensible heat exchange between the high-temperature exhaust gas and the low temperature waste heat air from a micro gas turbine power generator as air for desorbing a dehumidifying rotor 2, is provided, and the dehumidifying rotor 2 is desorbed by the low temperature waste heat air which is passed through the sensible heat exchange means 7 and heated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehumidifying apparatus which operates using waste heat, such as a micro gas turbine generator having a boiler, and a dehumidifying air conditioner using the same. Even with this, highly efficient dehumidification and air conditioning can be performed.

[0002]

2. Description of the Related Art A refrigerating type of dehumidifying device that cools outside air to below a dew point by a refrigerator to remove moisture from the outside air,
Absorbs or absorbs the humidity of the outside air, dehumidifies the outside air, creates dry air, cools and supplies it.
There is an adsorption type. Although the refrigerating type has high dehumidifying efficiency when the absolute humidity of the outside air is high, it requires electricity or an engine as a driving energy source and a high-quality energy source.

On the other hand, the absorption / adsorption type can produce dry air having a dew point of 0 ° C. or less, and heat of about 100 ° C. can be used as a driving energy source, so that waste heat of a generator or the like is effectively used. be able to.

[0004] A dehumidifying air conditioner dehumidifies outside air by an absorption / adsorption type dehumidifier, produces dry air, cools it, 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.

Reference numeral 4 denotes a heater for heating air passing through the heater to about 100.degree. The air that has passed through the heater 4 is heated and enters the desorption zone 5 of the dehumidifying rotor 2. Reference numeral 6 denotes a blower which sucks air in the desorption zone 5 and discharges the air to the outside.

As the heater 4, an electric heater, a gas combustion heater, or a heat exchanger through which steam or the like passes is generally used.

[0008]

In the dehumidifying apparatus as described above, it is necessary to sufficiently detach and attach the dehumidifying rotor 2 in order to improve the dehumidifying performance. For this reason, it is desirable that the temperature of the heater 4 is high. If the temperature of the air heated by the heater 4 decreases, the desorption characteristics deteriorate.
If the temperature is lower than the temperature of 00 ° C., the desorption characteristics rapidly deteriorate.

Therefore, there is a problem that it is difficult to use waste heat of 100 ° C. or less as a heat source used for the heater 4. For this reason, it has been difficult to utilize, for example, residual heat of exhaust gas after passing through a boiler of a micro gas turbine generator that has recently attracted attention as a cogeneration device.

An object of the present invention is to provide a dehumidifier capable of exhibiting sufficient performance even when utilizing waste heat of a boiler or a micro gas turbine generator having a boiler, and a dehumidifier air conditioner using the same. Things.

[0011]

In order to solve the above-mentioned problems, the present invention utilizes the waste heat of a device for generating high and low temperature waste heat. A sensible heat exchange means for exchanging sensible heat between the high-temperature waste heat air and the low-temperature waste heat air from the waste heat source is provided, and the dehumidifying rotor is desorbed by the heated low-temperature waste heat air passing through the sensible heat exchange means. I did it.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention utilizes the waste heat of an apparatus for generating high and low temperature waste heat, and dehumidifies by drying by absorbing gas moisture. A sensible heat exchange means for exchanging sensible heat between the desorption air of the dehumidifying rotor, the high-temperature waste heat fluid from the waste heat source, and the low-temperature waste heat air, having the rotor, and passing the sensible heat exchange means The dehumidifying rotor is desorbed by the low-temperature waste heat air, and has the effect of desorbing the dehumidifying rotor using all the energy of the waste heat of the device that generates high-temperature and low-temperature waste heat. .

According to a fourth aspect of the present invention, the dry air produced by the dehumidifier according to the first aspect is cooled and supplied to the room, and the high-temperature and low-temperature waste heat is generated. Has the effect of performing air conditioning using all the energy of the waste heat of the device that generates the air.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 of a dehumidifier according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing a dehumidifier. Here, the blower 1, the dehumidifying rotor 2, the adsorption zone 3, the desorption zone 5, and the blower 6 are the same as those of the above-mentioned conventional example.

Reference numeral 7 denotes an orthogonal heat exchanger which is a kind of a stationary heat exchanger, and is an F-term theme 3 prepared by the Japan Patent Office.
It is as classified by BA02 of L059. That is, the flat sheet and the corrugated sheet are alternately laminated, and the wave directions of the corrugated sheet are alternately orthogonal to each other.

All of these components are housed in an enclosure 8. The upper half of the enclosure 8 has an opening 9 for taking in outside air, and the opposite side of the upper half of the enclosure 8 has an opening 10 for discharging dry air. The orthogonal heat exchanger 7 is mounted at a predetermined distance from the lower half end of the enclosure 8, and the space formed therein is the low-temperature exhaust inlet 1
Functions as 1. Then, the high-temperature exhaust gas is sent to the side surface of the orthogonal heat exchanger 7 from the lower half side surface of the enclosure 8.

The lower half end of the enclosure 8 has an outlet 12 for humid air after desorbing moisture adsorbed on the dehumidifying rotor 2.

FIG. 2 is a schematic side view of the micro gas turbine generator 13. The micro gas turbine generator 13 includes a gas turbine engine 15 in an enclosure 14.
And a boiler 17 that is connected to the generator 16 and heats water using heat of exhaust gas of the gas turbine engine 15.

The gas turbine engine 1 is installed in the boiler 17.
The exhaust pipe 18 for exhausting heat after the heat exchange is extended from the boiler 17 to the outside of the enclosure 14. 20 is a fan,
The outside air is supplied to the enclosure 14 to cool the gas turbine engine 15 and the generator 16. The supplied outside air deprives the gas turbine engine 15 and the generator 13 of heat, and the temperature rises to about 55 ° C., and is sent out of the enclosure 14 through the outlet 21.

FIG. 3 is a combination of the sectional view taken along the line BB of FIG. 1 and the top view of the micro gas turbine generator 13. Air from the outlet 21 is introduced into the low-temperature exhaust inlet 11;
The exhaust pipe 19 communicates with the side surface of the orthogonal heat exchanger 7.
Reference numeral 22 denotes a discharge port provided on the opposite side of the orthogonal heat exchanger 7.

The dehumidifying apparatus according to the first embodiment of the present invention is configured as described above, and its operation will be described below. First, when the gas turbine engine 15 is started, the power generator 13 starts power generation. And the gas turbine engine 15 is 270
Exhaust gas having a high temperature of about ° C. is emitted, and the exhaust gas enters the boiler 17 through an exhaust pipe 18.

In the boiler 17, the heat of the exhaust gas is transferred to water, and hot water of about 90 ° C. is supplied from the boiler 17 to the hot water destination. The temperature of the exhaust gas passing through the boiler 17 is 1
The temperature drops to about 00 ° C. and is discharged from the exhaust pipe 19.

The fan 20 operates to send outside air to the enclosure 14. The outside air sent into the enclosure 14 cools the gas turbine engine 15 and the generator 13, rises in temperature to about 55 ° C., and is discharged from the outlet 21.

As shown in FIG. 3, the exhaust gas after passing through the boiler 17 passes through the exhaust pipe 19 and passes through the orthogonal heat exchanger 7.
And is discharged to the atmosphere through the discharge port 22. Outlet 2
The air of about 55 ° C. coming out of 1 enters the desorption zone 5 from the low-temperature exhaust inlet 11 through the orthogonal heat exchanger 7.

The air having a temperature of about 55 ° C. discharged from the outlet 21 exchanges heat with the exhaust gas that has passed through the exhaust pipe 19 in the orthogonal heat exchanger 7, and the temperature is raised from 60 ° C. to 90 ° C. as shown in FIG. To rise. That is, the temperature of the connection end of the exhaust pipe 19 of the orthogonal heat exchanger 7 is high, and the temperature gradually decreases toward the discharge port 22, thereby generating a temperature distribution.

On the other hand, the air sent to the adsorption zone 3 of the dehumidifying rotor 2 by the blower 1 is desorbed by the dehumidifying rotor 2 and becomes dry air, which is sent out of the enclosure 8 through the outlet 10. This dry air is guided indoors.

At this time, the dehumidifying rotor 2 is rotating, and the portion of the dehumidifying rotor 2 to which the outside air is adsorbed moves to the desorption zone 5. The moisture adsorbed on the dehumidifying rotor 2 is desorbed by high-temperature air of 60 ° C. to 90 ° C.
Is released to the outside.

As described above, a temperature distribution is generated in the air exiting the orthogonal heat exchanger 7, and the coldest air of this distribution is applied to a portion immediately after the air enters the desorption zone 5 of the dehumidifying rotor 2.
The air having the highest temperature is applied to the final part of the desorption of the dehumidifying rotor 2.

The portion of the dehumidifying rotor 2 immediately after entering the desorption zone 5 has the highest moisture content, and is desorbed even by low-temperature air. The final portion of the desorption of the dehumidification rotor 2 has a low moisture content. Desorption is performed with high temperature air because it is small. Thus, the dehumidifying rotor 2 can be efficiently desorbed even if low-temperature waste heat is used.

Next, the first embodiment of the dehumidifying air-conditioning apparatus in which the dry air produced by the dehumidifying apparatus is cooled and supplied to the room using the first embodiment of the dehumidifying apparatus described above will be described with reference to FIG. Will be explained.

FIG. 5 shows the blower 1, the dehumidifying rotor 2, the adsorption zone 3, the desorption zone 5, the blower 6, the orthogonal heat exchanger 7, the enclosure 8, the intake 9, and the blower 1 shown in FIGS. Low-temperature exhaust inlet 11, outlet 12,
It is common with the exhaust pipe 19.

Reference numeral 23 denotes a second orthogonal heat exchanger for exchanging only sensible heat, in which air dried after passing through the adsorption zone 3 is passed through one of the passages. The air passing through one of the passages is supplied indoors as supply air SA. In addition, the other passage of the second orthogonal heat exchanger 23 passes the air RA from the room.

Reference numeral 24 denotes a spray for spraying water to the air RA immediately before entering the other passage of the second orthogonal heat exchanger 23. Reference numeral 25 denotes an exhaust passage for guiding the air flowing out of the other passage of the second orthogonal heat exchanger 23 to the suction side of the fan 6.

The first embodiment of the dehumidifying air conditioner is configured as described above, and the operation thereof will be described below. First, when the gas turbine engine 15 is started, the power generator 13 starts power generation. And the gas turbine engine 15 is 270 ° C
Exhaust gas of high temperature, and this exhaust gas
Enter boiler 17 through 8.

The heat of the exhaust gas is transferred to water in the boiler 17, and hot water of about 90 ° C. is supplied from the boiler 17 to the hot water destination. The temperature of the exhaust gas passing through the boiler 17 is 1
The temperature drops to about 00 ° C. and is discharged from the exhaust pipe 19.

The fan 20 operates to send outside air to the enclosure 14. The outside air sent into the enclosure 14 cools the gas turbine engine 15 and the generator 13, rises in temperature to about 55 ° C., and is discharged from the outlet 21.

As shown in FIG. 5, the exhaust gas after passing through the boiler 17 passes through an exhaust pipe 19 and passes through the orthogonal heat exchanger 7.
to go into. Although the outlet 22 is not shown in FIG. 5, the gas passing through the orthogonal heat exchanger 7 is discharged from the outlet 22 to the atmosphere. Further, the air at about 55 ° C. that exits from the outlet 21 passes through the orthogonal heat exchanger 7 from the low-temperature exhaust inlet 11 and enters the desorption zone 5.

The air having a temperature of about 55 ° C. discharged from the outlet 21 exchanges heat with the exhaust gas that has passed through the exhaust pipe 19 in the orthogonal heat exchanger 7, and has a temperature of 60 ° C. to 90 ° C. as shown in FIG. To rise. That is, the temperature of the connection end of the exhaust pipe 19 of the orthogonal heat exchanger 7 is high, and the temperature gradually decreases toward the discharge port 22, thereby generating a temperature distribution.

On the other hand, the outside air of 31% relative humidity 65% sent to the adsorption zone 3 of the dehumidifying rotor 2 by the blower 1 is desorbed by the dehumidifying rotor 2 and the temperature rises due to the heat of adsorption, resulting in a temperature of 56 ° C. and a relative humidity of 9%. It is sent to one passage of the second orthogonal heat exchanger 23 as 0.5% dry air. Then, the air is cooled in one of the passages of the second orthogonal heat exchanger 23 and supplied into the room as comfortable supply air SA at 25 ° C. and 50% relative humidity.

The indoor air RA is 27 ° C. and the relative humidity is 55.
%, And water is sprayed by the spray 24 to 2
It becomes low temperature air at 1 ° C and 95% relative humidity. The amount of water sprayed by the spray 24 is set to be equal to or more than the amount of water vaporized by the spray. As a result, the air sent to the other passage of the second orthogonal heat exchanger 23 becomes a mist in which water particles are suspended in air having a relative humidity of 95%.

The atomized air is supplied to the second orthogonal heat exchanger 23.
When flowing to the other passage, the other passage is heated by the 56 ° C. high-temperature air passing through the one passage, so that water particles floating in the mist air in the other passage are vaporized.

Accordingly, the heat exchange characteristics of the second orthogonal heat exchanger 23 are different from those in the case where heat is exchanged between gases, and the outlet temperature of the other passage is much lower than the inlet temperature of one passage. In the experiment, the air at the outlet of the other passage was 32 ° C. and the relative humidity was 83%.

The humid air passes through the exhaust passage 25 by the negative pressure of the fan 6 and is discharged from the discharge port 12 to the outside.

During the above operation, since the dehumidifying rotor 2 is rotating, the portion of the dehumidifying rotor 2 that has adsorbed outside air moves to the desorption zone 5. The moisture adsorbed on the dehumidifying rotor 2 is desorbed by high-temperature air at 60 ° C. to 90 ° C., and is discharged to the outside by the blower 6.

As described above, a temperature distribution is generated in the air exiting the orthogonal heat exchanger 7, and the coldest air in this distribution is applied to a portion of the dehumidification rotor 2 immediately after entering the desorption zone 5,
The air having the highest temperature is applied to the final part of the desorption of the dehumidifying rotor 2.

The portion of the dehumidification rotor 2 immediately after entering the desorption zone 5 has the highest moisture content, and desorption is performed even with low-temperature air. The final portion of the desorption of the dehumidification rotor 2 has a low moisture content. Desorption is performed with high temperature air because it is small. Thus, even if waste heat at a low temperature is used, the dehumidifying rotor 2 can be efficiently attached and detached, and comfortable air can be supplied since the dehumidifying effect of the outside air is high.

Next, a second embodiment of the dehumidifying apparatus will be described. FIG. 6 is a perspective view showing the dehumidifier. Here, a blower 1, a dehumidifying rotor 2, an adsorption zone 3, a desorption zone 5, a blower 6, an orthogonal heat exchanger 7, an enclosure 8, an intake 9, a low-temperature exhaust inlet 11, an outlet 12, and an exhaust pipe 1.
9 is the same as that of the first embodiment of the dehumidifier.

In the dehumidifying apparatus according to the second embodiment, a purge zone 26 is provided downstream of the desorption zone 5 and upstream of the adsorption zone in the rotation direction of the dehumidification rotor 2. The outside air is configured to pass through the purge zone 26 and enter the low-temperature exhaust air inlet 11. The other configuration of the dehumidifying apparatus of the second embodiment is the same as that of the first embodiment of the dehumidifying apparatus.

The operation of the second embodiment of the dehumidifier will be described below with respect to only the differences from the first embodiment of the dehumidifier. Outside air is sent to the adsorption zone 3 and the purge zone 26 by the fan 1.

The outside air is sent to the purge zone 26 to absorb the heat of the dehumidifying rotor 2. That is, since the temperature of the dehumidifying rotor 2 is increased in the adsorption zone 3, the temperature of the outside air is increased by passing through the purge zone 26, and the temperature of the dehumidifying rotor 2 is decreased.

As described in the first embodiment, when the temperature of the dehumidifying rotor 2 rises to 90 ° C. near the end of the desorption zone 5, the temperature of the air exiting the purge zone 26 rises to 70 ° C.

Since the temperature of the dehumidifying rotor 2 is lowered before entering the adsorption zone 3, the adsorption operation in the adsorption zone 3 is effectively performed. In addition, since the temperature of the air exiting the purge zone 26 has risen to 70 ° C., the temperature in the low-temperature exhaust air inlet 11 has risen to 58 ° C., and the desorption of the adsorption rotor 2 is effectively performed.

Next, a second embodiment of the dehumidifying air-conditioning apparatus in which the dry air produced by the dehumidifying apparatus is cooled and supplied to the room using the second embodiment of the dehumidifying apparatus described above will be described with reference to FIG. Will be explained.

The second embodiment of the dehumidifying air conditioner is the same as that of the first embodiment of the dehumidifying air conditioner, except that the blower 1, dehumidifying rotor 2, adsorption zone 3, desorption zone 5, blower 6, orthogonal heat exchanger 7, enclosure 8, the inlet 9, the low-temperature exhaust inlet 11, the outlet 12, the exhaust pipe 19, the second orthogonal heat exchanger 23, and the spray 24 are common.

In the dehumidifying apparatus according to the second embodiment, a purge zone 26 is provided downstream of the desorption zone 5 and upstream of the adsorption zone with respect to the rotation direction of the dehumidification rotor 2. The outside air is configured to pass through the purge zone 26 and enter the low-temperature exhaust air inlet 11. The rest of the configuration of the dehumidifying air conditioner of the second embodiment is the same as that of the first embodiment of the dehumidifying air conditioner. The above differences are the same as the differences between the dehumidifier of the first embodiment and that of the second embodiment.

That is, in the process of being sent to the purge zone 26, the outside air passes through the portion of the dehumidification rotor 2 after passing through the adsorption zone 3. Since the temperature of the dehumidifying rotor 2 is increased in the adsorption zone 3, the temperature of the outside air is increased by passing through the purge zone 26, and the temperature of the dehumidifying rotor 2 is decreased.

As described in the first embodiment of the dehumidifier, if the temperature of the dehumidifying rotor 2 rises to 90 ° C. near the end of the desorption zone 5, the temperature of the air exiting the purge zone 26 rises to 70 ° C. I do.

Since the temperature of the dehumidifying rotor 2 is lowered before entering the adsorption zone 3, the adsorption operation in the adsorption zone 3 is effectively performed. Further, since the temperature of the air exiting the purge zone 26 has risen to 70 ° C., the temperature in the low-temperature exhaust air inlet 11 has risen to 58 ° C., and the desorption of the adsorption rotor 2 has been effectively performed, so that The humidity of the supplied air SA is further reduced, and more comfortable air can be supplied.

When the humidity in the room decreases, the humidity of the air RA decreases, and the temperature after vaporization by the spray 24 also decreases. As a result, the temperature of the supply air SA decreases.

[0060]

As described above, the dehumidifying air-conditioning apparatus of the present invention comprises a sensible heat exchange means for exchanging sensible heat between the desorption air for the dehumidifying rotor, the high-temperature waste heat air from the waste heat source and the low-temperature waste heat air. The dehumidification rotor was desorbed by the low-temperature waste heat air heated after passing through the sensible heat exchange means, so the dehumidification rotor was desorbed by both the energy of the low-temperature waste heat air and the energy of the high-temperature waste heat air. Can be
Even if the temperature of the waste heat of the waste heat source is low, it can be effectively used.

Further, air-conditioning can be performed by using all the energy of the waste heat of the apparatus that generates high- and low-temperature waste heat, and air-conditioning is performed by using the energy of the waste heat source that could not be used conventionally. It can reduce carbon dioxide emissions and reduce peaks in summer electricity.

Further, in the dehumidifying apparatus and the dehumidifying air-conditioning apparatus of the present invention, by providing a purge zone for the dehumidifying rotor, it is possible to further reduce waste of energy and to effectively perform dehumidification and cooling with energy from a small waste heat source. it can.

Moreover, since effective cooling can be performed using water as the refrigerant, it is not necessary to use fluorine gas, and the ozone layer in the atmosphere can be prevented from being destroyed.

The dehumidifying air conditioner of the present invention uses an orthogonal heat exchanger as a sensible heat exchanger, and cools air by utilizing the fact that water particles evaporate while passing through the heat exchanger. Therefore, dehumidified air is cooled without being humidified, and comfortable air can be supplied.

[Brief description of the drawings]

FIG. 1 is a perspective view showing Embodiment 1 of a dehumidifying air conditioner of the present invention.

FIG. 2 is a sectional view showing an example of a micro gas turbine generator used in the present invention.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is a sectional view showing Embodiment 1 of the dehumidifying air conditioner of the present invention.

FIG. 6 is a perspective view showing a second embodiment of the dehumidifier of the present invention.

FIG. 7 is a sectional view taken along the line AA of FIG. 6;

FIG. 8 is a sectional view showing a second embodiment of the dehumidifying air conditioner of the present invention.

FIG. 9 is a perspective view of a conventional dehumidifier.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blower 2 Dehumidification rotor 3 Adsorption zone 5 Desorption zone 6 Blower 7 Orthogonal heat exchanger 8 Enclosure 9 Intake port 10 Outlet port 11 Low temperature exhaust inlet 12 Outlet 13 Micro gas turbine generator 14 Enclosure 15 Gas turbine engine 16 Generator 17 Boiler 19 Exhaust pipe 20 Fan 21 Outlet 22 Outlet 23 Second orthogonal heat exchanger 24 Spray 25 Exhaust passage 26 Purge zone

Claims (4)

[Claims] The present invention utilizes a waste heat of an apparatus for generating high and low temperature waste heat, comprising a dehumidifying rotor for adsorbing and drying gaseous moisture, and removing air from the dehumidifying rotor and removing waste air. Sensible heat exchange means for exchanging sensible heat between the high-temperature waste heat fluid from the heat generation source and the low-temperature waste heat air is provided, and the dehumidifying rotor is desorbed by the low-temperature waste heat air heated after passing through the sensible heat exchange means. A dehumidifying device characterized in that it is used. 2. The dehumidifier according to claim 1, wherein the sensible heat exchange means is a static heat exchanger. 3. The dehumidifier according to claim 1, wherein the air having the highest temperature due to the temperature distribution of the sensible heat exchanger is applied to the final portion of the desorption of the dehumidifying rotor. 4. A high-temperature waste heat from a waste heat source, wherein the waste heat of a device for generating high-temperature and low-temperature waste heat is used. A sensible heat exchange means for exchanging sensible heat between the fluid, the low-temperature waste heat air and the purge air of the dehumidifying rotor is provided, and a mixed air of the low-temperature waste heat air and the purge air heated after passing through the sensible heat exchange means is provided. To remove the dehumidifying rotor,
A dehumidifying air conditioner configured to cool the air dried by the dehumidifying rotor and supply the air indoors.