Patent Application
20080083232
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
In the drawings:
Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.
Referring to
The desiccant rotor 110 is normally formed in a cylindrical shape filled with a honeycomb structure, so that the air can pass through channels defined by the honeycomb structure. A desiccant (not shown) such as silica gel, zeolite or LiCl is coated on the walls defining the air paths through the desiccant rotor 110. The desiccant adsorbs moisture from the air passing through the desiccant rotor 110. The desiccant rotor 110 is mounted on a structure (not shown) to be rotated around a rotation shaft 111 at its center.
The regeneration unit 120 is disposed at one side of the desiccant rotor 110, for heating the air flowing toward the desiccant rotor 110. Hot water is supplied to the regeneration unit 120 to provide thermal energy to heat the air. Accordingly, the regeneration unit 120 becomes at least one of a hot water air heater. The hot water supplied to the regeneration unit can be from a district energy facility such as a cogeneration plant 500 (refer to
Moreover, in order to prevent mixing of the air flows F1 and F2 flowing into first and second regions A1 and A2 of the desiccant rotor 110, respectively, a partition wall (not shown) can be installed on a imaginary line 112 dividing the first and second regions A1 and A2.
The operation of the dehumidification apparatus 100 in accordance with the present invention will now be described.
The air flow F1 flowing into the first region A1 of the desiccant rotor 110 passes through the desiccant rotor 110 through a channel formed by the honeycomb structure of the desiccant rotor 110. In this process, the desiccant coated on the desiccant rotor 110 adsorbs moisture from the air flow F1. Therefore, the air flow F1′ is dehumidified and dried through the desiccant rotor 110. On the other hand, the first region A1 of the desiccant rotor 110 has high moisture uptake due to the moisture adsorption.
The air flow F2 passing through the regeneration unit 120 is heated to the regeneration temperature by the hot water flowing in the regeneration unit 120. This air flow F2 at the regeneration temperature flows into the second region A2 of the desiccant rotor 110.
Since the desiccant rotor 110 rotates around the rotation shaft 111, the part of the desiccant rotor 110 with high moisture uptake previously occupied the first region A1 turns to the second region A2. Then the moisture is desorbed by the air flow F2 having the raised temperature. As a result, the air flow F2′ which has passed through the second region A2 has high humidity.
As the moisture is desorbed by the air flow F2, the second region A2 is dried again, which is called regeneration of the desiccant rotor 110. The regenerated part of the desiccant rotor 110 at the second region A2 turns to the first region A1 as the desiccant rotor 110 rotates. Accordingly, at the first region A1 the moisture is removed from the air flow F1 continuously.
In the above dehumidifying process, the air flow F2 supplied to the desiccant rotor 110 directly contacts the desiccant rotor 110 and transfers heat, thereby improving transfer efficiency. Even if the temperature of the regeneration heat source (hot water) is low, the desiccant rotor 110 is efficiently regenerated to attain a sufficient dehumidification effect.
As illustrated in
The casing 210 encloses two channels, i.e., the first and the second channels 211 and 212. The first and second channels 211 and 212 are divided by a partition wall 213 disposed inside the casing 210. Both ends of the first and second channels 211 and 212 are opened, so that the air can flow through the first and second channels 211 and 212, respectively.
The desiccant rotor 220 and the regeneration unit 230 correspond to the desiccant rotor 110 and the regeneration unit 120, respectively, mentioned above. Detailed explanations thereof are omitted.
The desiccant rotor 220 is installed across the partition wall 213 to be placed crossing the first and second channels 211 and 212. The regeneration unit 230 is disposed inside the second channel 230. As mentioned above, the regeneration unit 230 is a hot water air heater supplied with hot water from the district energy facility or the water heater for space heating.
To facilitate the air flows passing through the first and second channels 211 and 212, first and second fans 241 and 242 can be additionally disposed in the first and second channels 211 and 212, respectively.
When the air flow which has passed through the first channel 211 is supplied to an indoor space intended to be air-conditioned, the air flow passing through the second channel 212 must be taken from an outdoor space and discharged back to the outdoor space. For this, extension ductwork 260 for connecting the second channel 212 to the outdoor space is provided with at both ends of the second channel 212.
To supply the low temperature and low humidity air into the indoor space, a cooling unit 250 is added to the dehumidification apparatus.
For example, a sensible heat rotor 251 can be used as the cooling unit 250. The sensible heat rotor 251 is made of heat absorbing material having high thermal capacity, so that the air flows flowing in the first and second channels 211 and 212 can exchange heat via the sensible heat rotor 251. The air in the first channel 211 flowing out of the desiccant rotor 220, which is increased in temperature due to the heat release from the moisture sorption process through the desiccant rotor 220, is cooled transferring heat to the sensible heat rotor 215. Then, the heated part of the heat rotor 215 rotates into the second channel 211 to release heat to the air flowing from outdoors. For this, identically to the desiccant rotor 220, the sensible heat rotor 251 is installed across the partition wall 213, and rotates over the first and second channels 211 and 212.
For further cooling, a cooling coil 252 can be installed in the first channel 211 at the outlet of the sensible heat rotor 251. The cooling coil 252 additionally cools the air which has passed through the sensible heat rotor 251 by refrigerants or chilled water.
As shown in
The first casing 310 is a hollow body with its inlet 311′ and outlet 311″ opened at both ends. The inside space of the first casing 310 is divided into a first channel 311 and a second channel 312 by the second casing 320 disposed inside the first casing 310.
The second casing 320 is a blocked hollow body. The partition wall 330 is disposed inside the second casing 320. The partition wall 330 partitions off the inside space of the second casing 320 into third and fourth channels 321 and 322 in communication with each other.
The desiccant rotor 340 and the regeneration unit 350 correspond to the desiccant rotor 220 and the regeneration unit 230 explained above. Therefore, detailed explanations thereof are omitted.
As shown in
The condensing unit 360 is a sort of heat exchanger for exchanging heat between the hot humid air from the regeneration side of the desiccant rotor and the relatively cool air branching from the return air stream through an independent air channel 312. The hot humid air from the regeneration side is cooled by the relatively cold return air resulting in the moisture condensation. Consequently, the desorbed moisture from the desiccant rotor in the regeneration side is removed from the regeneration air at the condensing unit 360.
A cooling unit 380 for cooling the air dehumidified by the desiccant rotor 340 corresponds to the cooling unit 250 described above. The dehumidified air from the desiccant rotor 340 is finally cooled by the cooling unit 380 and is supplied to an indoor space intended to be air-conditioned. Fans 371 and 372 for facilitating air flows in the casings 310 and 320 correspond to the fans 241 and 242 described above.
Differently from the air conditioning apparatus 200, the air conditioning apparatus 300 recycles the air in the second casing or regeneration circuit 320, and thus does not need to induce the outdoor air. When the air conditioning apparatus 300 is disposed indoors, the indoor air is taken through the inlet 311′ and discharged to the indoor space through the outlet 311″. That is, induction of the outdoor air is not required. As a result, holes are not bored through an outer wall of a building in the installation of the air conditioning apparatus 300. In addition, as compared with the air conditioning apparatus 200, the air conditioning apparatus 300 does not require the extension channel or ductwork 260. Accordingly, the air conditioning apparatus 300 can be easily installed and disassembled.
Referring to
The dehumidification system 400 is composed of a dehumidification or air conditioning apparatus 410, a hot water circuit 420 and a heat exchanger 430.
The dehumidification or air conditioning apparatus 410 installed in indoor space (house, workroom, etc.) is one of the dehumidification apparatus 100 and the air conditioning apparatuses 200 and 300 for supplying the dehumidified (and cooled) air to the space requiring air-conditioning. Such apparatuses 100, 200 and 300 have been described above.
The dehumidification or air conditioning apparatus 410 is connected to the hot water circuit 420 to be supplied with the regeneration heat for the desiccant rotor 110, 220 or 340. The heat exchanger 430 transfers heat from the district heat supply system 500 to the hot water circuit 420.
The district heat supply system 500 is a central energy facility such as a cogeneration plant. The cogeneration plant 500 stores waste heat generated by electricity generation in a thermal storage tank 510. A heat exchanger 520 performs heat exchange with water. The water supplied with heat moves along a heat transfer line 540 connected to the heat exchanger 430 by a circulation pump 530.
By this configuration, the waste heat can be supplied from the district heat supply system 500 to each space requiring air-conditioning, and used to dehumidify and cool the air. With this increased heat demand to supply air-conditioning in the summer, it is possible to operate the cogeneration plant 500 even in the summer which has not been normally managed due to large decrease in the heat demand in summer.
Another advantage of the present invention is that any additional installation of the water lines is not required for the embodiment of the present invention except the original hot water circuit for heating. It is thus possible to efficiently economically use the waste heat for air conditioning.
As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds are therefore intended to be embraced by the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2006-0098151 | Oct 2006 | KR | national |
