JPH0781253B2 - How to remove advancing fog from the runway and its vicinity - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to the gliding of an airport in which advective fog such as sea fog generated when hot and humid air over the Kuroshio flows over Oyashio continuously. The present invention relates to a runway and a method for removing fog in the vicinity of a runway that enables safe takeoff and landing of an aircraft by reducing the concentration of fog on and near the runway.

[Prior Art] FIGS. 6 to 7 are examples of prior art, which is a runway defoaming device described in Japanese Patent Laid-Open No. 58-83710, and FIG. 6 is a cross-sectional view of a runway and an underground heat storage structure. FIG. 7 is an enlarged sectional view of the underground heat storage structure. 6 to 7, 51 is a runway, 52 is a solar heat collector, 53 is an underground concrete structure, 54 is a blower, 55 is an air chamber, 56 is a switching damper, 57 is an intake port,
58 is an air blowing nozzle, 59, 60, 61, 62 are liquid piping,
63 is a liquid tank and 64 is a heat storage tank structure. The fog above the runway 51 in the prior art is as shown in FIG.
High temperature air is jetted upward from a large number of air blowing nozzles 58 provided on both sides of 51, and is performed by rising airflow and temperature rise. At that time, solar heat is stored in the heat storage tank structure 64 as energy necessary for raising the temperature of the air, and this is taken out as appropriate. That is, an underground concrete structure directly below the solar heat collector 52 arranged on the solar radiation surface of the ground surface.
A heat storage unit filled with substances such as oils and fats having a relatively low melting point and a relatively large latent heat, such as various hydrated salts and hydrated salt mixtures, or paraffin and silicon oil, is collectively arranged in the 53. In FIG. 7, first, in the heat storage operation, the discharge air of the blower 54 enters the solar heat collector 52 from the air chamber 55 through the switching damper 56, and this heat collector 52
The air heated by the meandering current flows from the row of upper unit heat storage tanks to the row of lower unit heat storage tanks, heats the heat storage substance in each heat storage unit, and finally again. The fan 54 sucks the air and repeats this circulation. By continuing this heat storage movement, the heat storage material in the heat storage unit is melted, and most of the heat storage units contain the melted heat storage material particularly when the solar radiation is strong. The generation of fog is detected in advance by a temperature sensor that constantly monitors the atmospheric condition, and the defoaming operation of the fog, that is, the heat radiation operation is performed. In this heat radiation operation, the switching damper 56 is operated to blow the air in the air chamber 55 into the air blowing nozzle.
Then, the air from the intake port 57 is introduced into the solar heat collector 52. As a result, the air intake 57
The air taken in from is heated by the heat of solidification of the heat storage substance as it passes through the heat storage tank structure 64, and is further jetted from the air blowing nozzle 58 to above the runway 51. This dissipates the fog above runway 51.

[Problems to be Solved by the Invention] As described above, also in the above-mentioned conventional technology, the mist is dissipated by heating the air by using inexpensive solar heat as a heat source and ejecting the heated high-temperature air above the runway. It was possible to

However, in the above-mentioned conventional technique, the air heated by the stored solar heat is boosted by a blower and ejected above the runway from a large number of air blowing nozzles arranged along the runway to dissipate the fog. Therefore, there is a disadvantage that a large-capacity blower, an air system duct, and piping equipment are required, and the operating cost becomes very large.

[Means for Solving the Problems] The present invention reduces the above-mentioned inconveniences, dissipates advancing fog on the runway and in the vicinity thereof with a relatively low equipment cost due to a simple structure and low operating cost, and has a good visibility. It is an object of the present invention to provide a method for removing advective fog that enables the aircraft to be retained and enables visual takeoff and landing of aircraft to be performed safely.

This object is achieved by means of the claims 1-6. That is: 1. At an airport where advective fog flows in, a plurality of panel heaters are formed on the ground surface near the runway by surrounding the peripheral wall and bottom surface with a heat insulating material, and the upper surface by a material having a high emissivity in the far infrared region. A method of removing advective fog in a runway for laying and selecting a required panel heater according to the direction, velocity, concentration, etc. of inflowing advancing mist, and feeding a heat medium into the selected panel heater and its vicinity.

2. The method for removing advective fog in the runway and its vicinity according to claim 1, wherein the heat source of the panel heater is solar heat.

3. The method for removing advancing fog in the runway and its vicinity according to claim 1, wherein the heat source of the panel heater is geothermal heat.

4. The method for removing advancing fog in the runway and its vicinity according to claim 1, wherein the heat source of the panel heater is industrial waste heat.

5. The heat source of the panel heater is waste combustion heat.
A method for removing advective fog on the runway and its vicinity.

Is. Hereinafter, the operation and the like of the present invention will be described based on Examples.

[Examples] FIGS. 1 to 5 are views showing an example based on the present invention, and FIG. 1 is a part of the vicinity of a runway when solar heat is used as a heat source of a panel heater laid on the side of the runway. Broken perspective view, second
The figure shows a partially broken perspective view of the vicinity of the runway when solar heat is used as the heat source of the panel heater laid on the advection fog entrance side of the runway. Figure 3 shows the heat source of the panel heater laid on the side of the runway. Partially broken perspective view of the vicinity of the runway when geothermal, industrial waste heat, waste combustion heat, etc. are used. Fig. 4 shows the heat source of the panel heater laid on the advancing fog entrance side of the runway. FIG. 5 is a partially cutaway perspective view of the vicinity of the runway when waste heat of combustion is used, and FIG. 5 is an enlarged perspective view of the panel heater in FIGS. In FIGS. 1 to 5, 1 is a runway, 2 is a panel heater, 3 is a condensing heat collector, 4 is a reflection plate, 5 is a heat exchange and heat storage tank, 6 is a circulation pump, and 7 is a heat medium circulation pipe. , 8 is a receiver tank, 9 is a heat source, 10 is a heat insulating material, 11 is a heat medium inlet, 12 is a heat medium outlet, 13
Is the advancing fog direction. First, in FIG. 1, panel heaters 2 are laid along both sides of the runway 1 along the runway 1. In FIG. 2, a panel heater 2 is laid on the runway 1 on the advancing fog entrance side. 1 and 2, on the ground near the runway 1 of the airport, a unit for collecting solar energy, which is composed of a concentrator collector 3, a reflector 4, a heat exchange tank 5 and the like, is provided. The solar energy is stored in the heat exchange and heat storage tank 5 while the sunlight is radiated. The heat in the heat exchange and heat storage tank 5 is sent to the panel heater 2 by the circulation pump 6 via a heat medium such as hot water. The panel heater 2 is divided into a plurality of blocks and laid, and as shown in FIG. 5, the peripheral wall and the bottom surface of each panel heater 2 are surrounded by a heat insulating material 10, and the upper surface has a high emissivity in the far infrared region. For example, it is coated with ceramics or paint. Therefore, when the heat medium such as hot water is sent into the panel heater 2 by the circulation pump 6 and the heat energy is transmitted to the ceramics, far infrared rays are radiated from the surface of the ceramics or the paint. By irradiating the mist above the runway 1 with the far infrared rays, the fine water droplets forming the mist are heated and evaporated, and the mist dissipates. Panel heater 2
The temperature of the heat medium such as hot water that has been heated is lowered and returned to the heat exchange and heat storage tank 5 via the receiver tank 8. 3 to 4 show an outline of equipment when heat other than solar energy is used as the heat source of the panel heater 2. 3 to 4, in the case where the heat source 9 of the panel heater 2 is geothermal energy in which high-temperature hot water or steam is taken out through the remaining hot water system, the deep deep hot water system, the hot rock body, etc.,
In the case of industrial waste heat such as high-temperature gas or high-temperature water, or when it is the heat of combustion of waste of combustible substances such as solid, liquid, gas, etc., first, the heat generated by each heat source is converted into steam, high temperature. It is introduced into the heat exchange and heat storage tank 5 in the form of gas or high-temperature liquid as it is, and the latent heat or sensible heat of each is exchanged with the heat medium such as water to heat the heat medium and then to the heat generation source again. To return. This operation is repeated to perform heat exchange and accumulate a sufficient amount of heat in the heat storage tank 5. When advective mist flows into the upper part of the runway 1, the circulation pump 6 is operated to select a heat medium such as hot water in the heat exchange and heat storage tank 5 in accordance with the inflow direction or concentration of the advective mist. It is fed into the panel heater 2 of. Similar to the embodiment of FIGS. 1-2, the structure of the panel heater 2 is such that the upper surface thereof is coated with ceramics or paint having a high emissivity in the far infrared region as shown in FIG. Far-infrared rays are radiated from the surface of ceramics or paint which has been heated by heat. As a result, the fine water droplets forming the mist on the runway 1 are heated and evaporated to dissipate the mist.

[Effects of the Invention] As described in the above embodiments, the present invention lays a panel heater coated with, for example, ceramics or paint on the ground surface in the vicinity of a runway at an airport where advancing fog flows in, and the solar heat and the geothermal heat are applied. By heating the ceramics or paint on the surface of the panel heater by industrial waste heat or waste combustion heat to radiate far infrared rays into the mist, natural energy or waste heat is used to run at a very low running cost. It has the effect of dissipating or reducing the concentration of fog on and near the road to improve visibility and enable visual takeoff and landing of aircraft.

[Brief description of drawings]

1 to 5 are views showing an embodiment based on the present invention, and FIG. 1 is a partially cutaway perspective view in the vicinity of a runway when solar heat is used as a heat source of a panel heater laid on the side of the runway, Second
The figure shows a partially broken perspective view of the vicinity of the runway when solar heat is used as the heat source of the panel heater laid on the advection fog entrance side of the runway. Figure 3 shows the heat source of the panel heater laid on the side of the runway. Partially broken perspective view of the vicinity of the runway when geothermal, industrial waste heat, waste combustion heat, etc. are used. Fig. 4 shows the heat source of the panel heater laid on the advancing fog entrance side of the runway. FIG. 5 is a partially cutaway perspective view of the vicinity of the runway when waste heat of combustion is used, and FIG. 5 is an enlarged perspective view of the panel heater in FIGS. 6 to 7 are examples of the prior art. 1 ... Runway, 2 ... Panel heater, 3 ... Concentrator heat collector, 4 ... Reflector plate, 5 ... Heat exchange and heat storage tank,
6 ... Circulation pump, 7 ... Heat medium circulation piping, 8 ... Receiver tank, 9 ... Heat source, 10 ... Insulation material, 11 ... Heat medium inlet, 12 ... Heat medium outlet, 13 ... Advection fog Approach direction, 51 ...
… Runway, 52 …… Solar collector, 53 …… Underground concrete structure, 54 …… Blower, 55 …… Air chamber, 56…
… Switching damper, 57 …… Intake port, 58 …… Air blowing nozzle, 59,60,61,62 …… Liquid piping, 63 …… Liquid tank, 64 …… Heat storage tank structure.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshio Tsuchida 118 Futatsuka, Noda City, Chiba Prefecture Kawasaki Heavy Industries Ltd. Noda Factory (56) Reference JP-A-58-160415 (JP, A) JP-A-63-293201 (JP, A) Actual opening Sho 59-129913 (JP, U) Actual opening Sho 62-16117 (JP, U) Actual opening Sho 61-141327 (JP, U)

Claims (5)

[Claims] 1. A panel heater having a peripheral wall and a bottom surface surrounded by a heat insulating material and having a top surface made of a material having a high emissivity in the far infrared region on an earth surface near a runway at an airport where advancing fog flows in. Multiple runners are installed, and the required panel heater is selected according to the direction, speed, concentration, etc. of the inflowing advancing fog, and the heat medium is fed into the selected panel heater. Advection fog removal method. 2. The method for removing advancing fog in the runway and its vicinity according to claim 1, wherein the heat source of the panel heater is solar heat. 3. The heat source of the panel heater is geothermal heat.
1. Advection fog removal method on the runway and its vicinity. 4. The method for removing advancing fog in the runway and its vicinity according to claim 1, wherein the heat source of the panel heater is industrial waste heat. 5. The method for removing advancing fog in the runway and its vicinity according to claim 1, wherein the heat source of the panel heater is waste heat of combustion.