JPS5845635B2 - Liquid surface insulation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to improve the liquid surface insulation method, and more specifically, to improve the liquid surface insulation method, in particular, by skillfully utilizing the wave motion of the liquid surface, hexagonal hollow floating plates are arranged in a no-nikum shape. The present invention relates to a new method that can effectively prevent heat dissipation.

The most widespread technique for preventing heat dissipation from liquid stored in a liquid tank is to suspend a synthetic resin sheet on the liquid surface to isolate the outside air from the liquid surface.

However, although this method is effective when the upper part of the liquid surface is open and the area of the liquid surface is small, such as in a liquid tank, it is effective when the liquid tank is large, such as in heating equipment, etc.
Moreover, when the area above the liquid level is closed, the sheet covering method is extremely inconvenient and cannot be practically adopted.

However, as a countermeasure for such cases, attempts have been made to put a large number of Styrofoam pellets into the liquid tank to form a heat insulating layer on the liquid surface, thereby preventing heat dissipation.

However, when using this method, the styrene foam particles are small and easily disintegrate, so when the liquid in the liquid tank is forced to circulate, the styrene particles (particularly their layers) may get caught up in the liquid flow and cause damage to the mechanism. This was not a very practical method of insulating the liquid surface as it could cause mechanical failure.

The present invention was made in view of the above-mentioned drawbacks of conventional liquid surface insulation technology, and its gist is as follows: The thickness is H-% times the distance between opposite sides, In addition, a large number of floating plates made of thin-walled hard plastic hollow bodies having a substantially regular hexagonal shape with smooth surfaces are placed in a liquid tank, and the shock caused by the ripples on the liquid surface causes these floating plates to shake and give way to each other. In addition, there is a liquid surface insulation method characterized in that the entire target liquid surface is laid in a honeycomb shape.

Therefore, to comment on the present invention, first of all, in the method of the present invention, we decided to use floating plates made of thin-walled hard plastic hollow bodies with a substantially regular hexagonal shape with smooth surfaces. (1) A large number of floating plates are placed on the liquid surface. (2) If the outer shape of the floating plates is amorphous or circular, gaps will inevitably be created between adjacent floating plates, impairing the insulation effect of the liquid surface; (2) If the floating plate is in a shape other than hexagonal, such as square or rectangular, it is impossible to place the floating plate close to the liquid surface just by ripples on the liquid surface, and it is necessary to rearrange the floating plate from outside. (3) Also, if the floating plate gets caught in the liquid that is being forcedly circulated, it may cause a failure, so the floating plate must have considerable buoyancy and will not collapse even if left in a thermal state for a long period of time. This is because the ideal form is a hard plastic hollow body.

To illustrate the floating plate in more detail, Figure 1 shows a thickness of 40 mm.
This is a perspective view of a floating board made of a polyethylene resin hollow body, with a distance of 100 mm between opposite sides, and a resin thickness of 2 mm.When determining the specific dimensions of the floating board, as shown in this example, The distance between the opposite sides is approximately 2 of the thickness M
By making it about 4 times as large, it can be stably suspended at just the right stanchion position.

In addition, if a floating board is provided with a curved bulge that swells into a mid-height shape on both its upper and lower surfaces, even if the floating boards overlap each other when they are thrown in, the weight of the floating board and the bulging part will be reduced. Due to the subtle interaction between the water and the ripples on the liquid surface, the particles naturally yield to each other and are arranged in a honeycomb pattern.

Of course, if the surface of the floating plate is good enough, even the one shown in Figure 1 can be used.
It is possible to smoothly cover the liquid surface with floating plates.

According to the inventor's experiments, at a liquid level of 677L x 12m,
60cfrL x 60cIrL stepped liquid tank, thickness 40mm from 6 entrances and exits, distance between opposite sides 100 in 1 resin thickness 2
It took about 30 minutes to spread 7,000 floating boards made of polyethylene resin hollow bodies between them.

In order to specifically measure the liquid surface insulation effect according to the present invention, the inventor further conducted the following two types of experiments.

[Power consumption measurement experiment]

The power consumption required to pour 210e water into a rectangular parallelepiped-shaped polybath with an open top and hold it at 80°C for 30 minutes, and then hold the polybath at 80°C for another 2 hours with the open top, and the power consumption as described above. When we measured the power consumption required to spread 33 floating boards made of polyethylene resin hollow bodies and then maintain them at 80°C for 2 hours, we found that if the opening of the polyethylene bath was left open, the power consumption would be 4. 7KWH
On the other hand, when floating plates of the above standard were spread over the liquid surface in the polybath (the present invention), the power consumption was 1.8 KWH, which was found to be a significant power saving effect.

[Temperature change measurement experiment]

Instead of the above experiment, turn off the heat source and leave it in the laboratory for 3
When the water temperature was measured every 0 minutes, the results shown in the graph of FIG. 2 were obtained.

In Figure 2, 1 is the temperature change curve when the polyethylene bath is left open and no liquid surface insulation is applied, and 2 is the temperature change curve when the liquid surface in the polyethylene bath is covered with floating plates made of hollow polyethylene resin bodies (the present invention). The temperature change curves are shown respectively.

As is clear from the above description, the present invention can almost completely achieve liquid level insulation in a sealed liquid tank, which is difficult to manually operate from the outside, by simply inserting a floating plate through a small manhole. This method is extremely advantageous in today's world where resource and energy conservation are required, and the means for implementing this method are extremely simple and quick, making it extremely valuable for industrial use.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a floating plate used in the present invention, and FIG. 2 is a graph showing the results of a temperature change measurement experiment in a liquid tank. L... Distance between opposite sides (of floating plate), M...
Thickness (of the floating plate), 1... Temperature change curve without liquid surface insulation, 2... Temperature change curve with liquid surface insulation applied using the method of the present invention (floating plate in Figure 1) Temperature change curve for case.

Claims (1)

[Claims] 1. A large number of floating plates made of thin-walled hard plastic hollow bodies with a thickness M 1% times the distance between the opposite sides and a substantially regular hexagonal shape with smooth surfaces are placed in a liquid tank, and the liquid surface ripples. A liquid surface insulation method characterized by shaking and yielding these floating plates introduced by the shock caused by the shock, and spreading them over the entire target liquid surface in a honeycomb shape.