Structure cooling method

Abstract

The present invention provides a high-efficient method for cooling a structure by spraying water. An air / water mixture (31) including microbubbles each having a diameter of 75 μm or less is generated by an air / water mixture generating unit (29) mounted in a part extending from a water supply source (2a) to a water spray port (7, 30, 49), the water spray port (7, 30, 49), or in a water tank (14). By spraying the generated air / water mixture (31) from the water spray port (7, 30, 49), a target surface such as a roof (24a) of a structure (24) is covered with the air / water mixture (31), and the target surface is cooled by heat of evaporation of water.

Description

TECHNICAL FIELD[0001]The present invention relates to a high-efficiency energy-saving and cooling method using heat of evaporation of water.BACKGROUND ART[0002]In recent years, resolution of global warming caused by excessive use of fossil fuel, heat-island phenomenon in urban areas, and the like is an urgent issue. On the other hand, improvement in quality of living environment by natural symbiosis is also in demand. Hitherto, to address the issues, various novel energies and energy-saving systems are proposed.[0003]One of effective methods of directly removing heat of a structure, that is, positively taking heat quantity is so-called water sprinkling using heat of evaporation of water. Water sprinkling is customarily performed all over the place, and it is empirically proved that the cooling effect of water sprinkling is high. However, the efficiency is not always high. To be specific, although it seems that an entire target surface of water sprinkling is wet, in reality, the targ...

AI Technical Summary

Benefits of technology

[0027]According to the simple facility of the present invention, additional cooling is hardly required. Even in the case where additional cooling is necessary, a small additional cooling load is required. Thus, large energy saving is realized. As compared with normal water sprinkling, a clearer effect is displayed. The method can be called an innovative method which can be applied to cooling of a target surface in a wide range irrespective of the fact that the target surface is newly provided or already provided. Further, the method can be also widely applied to various materials of the target surface and is not easily influenced by dust and an adhered substance. The technique can be used also in the case where the target surface wears like the road surface. A high effect can be displayed for energy saving, reduction in the heat island phenomenon, and the like.

[0028]In the present invention, deterioration in a building material does not directly cause deterioration in evaporation performance, so that deterioration in performance with time does not easily occur. The economic burden is also reduced, and the effect of spreading the present invention can be expected.

[0029]With respect to construction, it is sufficient to add a supply water source, a water supply pipe, an air / water mixture generating unit, water spray nozzles and slits and, as necessary, a water tank, a water lifting pump, and the like to a structure. In addition, to further increase the efficiency, it is effective to make a capillary structure layer exist on a target surface.

[0030]By using the present invention, a material and construction cost for manufacturing, carrying, mounting, and replacing the material itself of the target surface is unnecessary. One of the effects large in the viewpoint of popularization is that regulation / change in the material cost, construction time, and design is also unnecessary or kept at the minimum. Since maintenance such as cleaning, re-coating, re-mounting, and injection of an agent after mounting is hardly necessary, there is also an effect in practice. Also in the case of providing the capillary structure layer in order to further improve the efficiency, the maintenance is hardly necessary.

[0031]In the present invention, an additive is not required at all, so that maintenance such as injection of an agent is hardly required. There is an effect that water suitable for the environment, plants, and human bodies can be assured. Therefore, the water can be used for other applications.

Problems solved by technology

In recent years, resolution of global warming caused by excessive use of fossil fuel, heat-island phenomenon in urban areas, and the like is an urgent issue.

However, the efficiency is not always high.

To be specific, although it seems that an entire target surface of water sprinkling is wet, in reality, the target surface is not sufficiently wet due to a water film caused by cohesion power of water and repulsion between water and the target surface.

Consequently, the vaporization area is limited, and it is difficult to remove sufficient vaporization heat.

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