JPH0756389B2 - Cold air supply facility for parked aircraft - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a facility for supplying cool air to a parked aircraft.

[Conventional technology]

Air-conditioning and heating air is supplied to the aircraft parked at the airport through an underground duct from an air conditioner installed in the spot spot pickle. For example, as shown in Figure 1,
The aircraft 2 is parked near the pit 1, air is sent from the air conditioner 4 in the cupicle 3 located away from the pit 1 to the pit 1 via the underground duct 5, and the flexible duct 6 on the ground is supplied from the pit 1. Air-conditioning air is sent into the aircraft 2 via. The air conditioner 4 is provided with a large blower 7 and a heat exchanger 8, and cold water or hot water of a regional pipe 9 shared with an airport building or the like is passed through the heat exchanger 8. In addition to this air conditioner 4, mechanical equipment for pneumatic power for jet engine start is installed in the cupicle 3, and compressed air and electric power are supplied from the central power room 10 to these mechanical equipment. In addition, it is supplied to the aircraft through a power pit and a pneumatic pit different from the air conditioning pit 1.

[Problems to be solved by the invention]

At international airports, jumbo machines frequently enter the pits to supply the necessary supplies, but the capacity of the air conditioners 4 is inevitably larger due to the trend toward larger models and shorter blast times. For this reason, the blower 7 also becomes large in size, and a large amount of air is taken in and compressed, so that the compression heat is also a considerable amount.
Therefore, in the cooling season, the heat exchanger 8 requires a large amount of cold water. For example, when the outside air temperature is 35 ° C, when the blower 7 is discharged, the temperature rises to about 50 ° C.
Under conditions such as cooling up to 200 m ³ / min and sending it to the aircraft at an air volume of 200 m ³ / min or more, the amount of cold water required by the heat exchanger 8 becomes large, and this can be achieved by the cold water in the regional piping made by the refrigerator. With technology, the heat source cost is also enormous.

The present invention has as an object to solve such a problem, and particularly to reduce a large amount of cold water required for supplying cold air to a parked aircraft in a cooling season with a simple facility.

[Means for solving problems]

The gist of the present invention that achieves the above-mentioned object is to provide a cool air supply facility for an aircraft that cools the discharge air of a blower with an air cooler through which cold water passes, and then sends the air to an aircraft during parking, A precooler is arranged between the blower and the air cooler, and cooling water that has exchanged heat with the outside air by an evaporative cooler is passed through the precooler. Further, the precooler is characterized in that cooling water that has exchanged heat with the outside air in the evaporative cooler is mixed with the condensed water of the air cooler and then passed through.

Here, the evaporative cooler stores a packing layer arranged in the intake air intake passage, a sprinkler for spraying water to be cooled on the packing layer, and cooling water that has dropped the packing layer. It comprises a water tank, and the cooling water of this water tank is pumped to the precooler and then circulated through the water sprinkler.
The evaporative cooler is housed in a casing together with a blower, an air cooler, a precooler, etc., and is configured as an integral grand cooler. In the heating season, hot air for air supply can be obtained by passing hot water through the air cooler and stopping the flow of cooling water through the precooler.

〔Example〕

FIGS. 2 and 3 show an embodiment of the equipment of the present invention in a sectional view and a perspective view. As shown in the figure, the facility of the present invention is an integrated product in which various devices are housed in one casing 11. Reference numeral 12 is a turbo blower, and 13 is an electric motor thereof. After the discharge air of the turbo blower 12 is cooled by an air cooler 14, it is sent to the air supply pipe 15 communicating with the above-mentioned underground duct. Cold water from a regional pipe shared with an airport building or the like is supplied to the air cooler 14 from a forward pipe 16, passes through the air cooler 14, and then is returned from a return pipe 17. The air cooler 14 is provided with a drain pan 18. Air cooler 14 for cooling season
Cold water is supplied to the room, but in the heating season, hot water is supplied to the room and the air heater is used. Up to this point, it is substantially the same as the conventional equipment (the air conditioner 4 described in FIG. 1).

In the facility of the present invention, the precooler 19 is installed in front of the air cooler 14 (before the air discharged from the blower 12 enters the air cooler 14), and the evaporative cooler 20 in this precooler 19 exchanges heat with the outside air. Pass cooling water. The cooling water is mixed with the condensed water of the drain pan 18 and then passed through the precooler 19. The device configuration will be described in detail below.

In the facility of the present invention, two independent air paths are formed in the casing 11. One is outside air → blower 12 → precooler
19 → air cooler 14 → air supply pipe 15 is the main path for the treated air, and the other one is a sub path for the outside air intake 22 → evaporative cooler 20 → fan 24 → exhaust. In addition, in FIG.
An example in which an eliminator 23 is arranged between the evaporative cooler 20 and the fan 24 in the sub path is shown. Partitioning plates 25, 25 '(Fig. 2) are used for the main path and the sub path for the casing 11
It is formed as an independent path inside. In this embodiment, the interior of the casing is further divided into an upper space and a lower space by a horizontal partition plate 29, and a sub path is formed at one corner of the upper space.

The evaporative cooler 20 includes a filling 26, a sprinkler 27 for sprinkling water to be cooled on the filling 26, and a water tank 28 for storing the cooling water falling from the filling 26, and the filling 26 is a sub path. It is installed in the secondary path so that the outside air taken in can be ventilated. That is, while the outside air taken in from the outside air inlet 22 into the sub-passage by the fan 24 passes through the filler 26, it comes into gas-liquid contact with the water to be cooled sprinkled from the water sprinkling device 27 and partly evaporates the water to be cooled. With this, latent heat and sensible heat are released to the outside air, the water to be cooled is cooled, and this cooling water is received by the water tank 28. This aquarium
The cooling water collected in 28 drops into the secondary water tank 31 below through the overflow pipe 30, and is once collected.

The cooling water in the secondary water tank 31 is piped by the drive of the pump 32.
It is supplied to the precooler 19 via 33, and after passing through the precooler 19, is returned to the sprinkler device 27 via the pipe line 34.
On the other hand, the condensed water collected in the drain pan 18 of the air cooler 14 is also mixed into the secondary water tank 31 via the drain pipe 35. A liquid level detector 36 is arranged in the drain pan 18 and a drain pipe is provided.
A strainer and a solenoid valve 37 are arranged at 35, and control the water supply into the secondary water tank 31 according to the amount of condensed water generated. Unlike tap water, this condensed water is less concentrated by evaporation, so it has desirable properties as makeup water for the evaporative cooler 20.

In the illustrated example, the water spray device of the evaporative cooler 20 is composed of a water spray pipe 38 and a water spray tank 39, and is evenly sprayed from the perforated plate at the bottom of the water spray tank 39 to the upper portion of the filler 26. I am trying to do it. In addition, the amount of cold water supplied to the air cooler 14 is controlled by the control valve.
Controlled by 40.

An example of the specifications of each of the above devices is as follows.

Turbo blower ... 270kg / mm × 1500mmAq × 90KW Air cooler ・ ・ ・ Cooling capacity ＝ 270 × 10 ³ Kcal / hr Cooling water amount ＝ 600 / min Cooling water temperature ＝ 6.5 ℃ → 14 ℃ Air temperature ＝ 35 ℃ → 8 ℃ （Heating In case of season) Heating capacity = 240 × 10 ³ Kcal / hr Hot water amount = 400 / min Hot water temperature = 60 ° C → 50 ° C Air temperature = -2 ° C → 50 ° C Precooler ・ ・ Cooling capacity = 60 × 10 ³ Kcal / hr hr Cooling water amount = 200 / min Cooling water temperature = 30 ℃ → 35 ℃ Air temperature = 50 ℃ → 35 ℃ Evaporative cooler ・ Cooling capacity = 60 × 10 ³ Kcal / hr Cooling water temperature = 50 ℃, 35 ℃ Outside air Wet-bulb temperature = 27 ° C. Filler = PVC According to the equipment of the present invention configured as above, the blower discharge air is pre-cooled by the cooling water of the evaporative cooler which can be manufactured at a much lower cost than the cooling water for district heating and cooling. Since it is cooled with cold water, it is possible to economically send cold air to the parked aircraft.
Then, while the condensed water of the air cooler, which was conventionally dripping, is used as make-up water for the evaporative cooler, the cold heat that it has can be effectively used for air cooling. Also, when the outside air temperature drops, the cooling water temperature obtained by the evaporative cooler also drops, so the rise in air temperature (about 15 ° C) due to the blower can be sufficiently cooled with this cooling water. Even if the air temperature rises, the blower discharge air temperature rises above the outside air temperature, so the cooling efficiency with the cooling water becomes even better. In heating seasons that require warm air, it is sufficient to stop the operation of the precooler and let warm water pass through the air cooler, and warm air can be easily created as in the past.

An aftercooler using a condensing unit may be installed downstream of the air cooler 14. In this case, condensed water in the aftercooler is treated in the same manner as the air cooler 14, and the condensing unit is also used. The cooling water of the evaporative cooler is passed through the condenser to remove the heat of condensation,
The cooling water may be sent to the evaporative cooler to radiate heat. This equipment with aftercooler makes it possible to control the temperature more finely, and it is also possible to produce the necessary cool air even if the supply of cold water is stopped during the interim period. It is more preferable because it functions as.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an example of an airport facility, FIG. 2 is a schematic sectional view showing a device body of a cool air supply facility for a parked aircraft according to the present invention, and FIG. It is the perspective view which showed the part through. 11 …… Casing, 12 …… Turbo blower, 14 …… Air cooler, 15 …… Air supply pipe leading to underground duct, 16 …… Cold water outflow pipe, 1
7 …… Cold water return pipe, 18 …… Drain pan 18,19 …… Precooler, 20 …… Evaporative cooler, 23 …… Eliminator, 24 …… Huan, 26 …… Filling material, 27 …… Sprinkler, 28 …… Aquarium, 31 ……
Secondary aquarium.

Claims (5)

[Claims] 1. A cooler for supplying air to an aircraft that cools discharge air of a blower with an air cooler through which cold water passes and then sends the air to an aircraft during parking, in which a precooler is provided between the blower and the air cooler. A cooling and supply facility for the aircraft to be parked, in which the cooling water that has exchanged heat with the outside air through an evaporative cooler is passed through this precooler. 2. A precooler between a blower and an air cooler in a cool air supply facility for an aircraft that cools discharge air of a blower with an air cooler through which cold water flows and then sends the air to an aircraft during parking. A cold air supply facility for a parked aircraft in which the cooling water that has exchanged heat with the outside air in an evaporative cooler is mixed with the condensed water of the air cooler and then passed through this precooler. 3. An evaporative cooler is provided with a packing layer arranged in the intake air ventilation passage, a sprinkler for spraying cooling water on the packing layer, and cooling water having dropped the packing layer. The cold air supply equipment for a parked aircraft according to claim 1 or 2, further comprising: a water tank for accumulating the water, the cooling water of the water tank being pumped to the precooler and then circulated to the sprinkler. 4. The blower, the air cooler, the precooler and the evaporative cooler are contained in one casing.
Cold air supply equipment for the parked aircraft described in 1, 2, 3 or 4. 5. The facility according to claim 1, 2, 3 or 4, wherein hot water is supplied to the air cooler and cooling water is stopped from being supplied to the precooler during the heating season.