JPS61208468A - Dipping type solar heat receiving unit for heating seawater by solar light - Google Patents

Abstract

PURPOSE:To permit the titled unit to receive sun light and to heat seawaters located at positions upper than the position where the unit is dipped by dipping a solar heat receiving body and solar heat receiving fins for promoting the function of the solar heat receiving body under the surface of the sea. CONSTITUTION:A solar heat receiving body 1 is constituted of some of timber, bamboo, metal, ceramics and fiber, and is formed into a grid shape or a plate shape having intervals or holes through which seawaters can pass. The solar heat receiving body 1 is dipped within approximately 2m under the surface of the sea in a fixed or floating state. Solar heat receiving fins 2 may be eliminated. Solar light is electromagnetic waves extending in infrared ultraviolet ray regions having a wave-length of 0.2-2mum. A so-called thermic rays existing in the infrared ray region have a low function for permeating water, and are substantially absorbed on the water level. However, approximately half of the energy of sun light exists on the side of a wavelength shorter than that of the thermic rays, and has a large permeating function under water and reaches a deep place under seawater level and is absorbed, where it is converted into heat. Thus, the apparatus has function to suppress the mixing of seawaters at the upper part with those at the lower part on the border of the deep place under the surface of the sea, and has also function to hold the temperature difference between both seawaters.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a solar heat receiver (1
) and solar heating fins (2
).

The solar heat receiving body may be made of wood, bamboo, metal, ceramic, or m-fiber, and may be in the form of a lattice, or may be in the form of a plate with gaps and holes to allow seawater to pass through. Good, these can be fixed or immersed in a floating state within approximately 2 meters below the sea surface. Solar heating fin (2
) may be omitted.

The working principle is as follows.

Sunlight is an electromagnetic wave that has a wavelength of 0.2 to 2 μm and spans the infrared to ultraviolet region. Among these, so-called heat rays in the infrared region have extremely low ability to penetrate water, and are absorbed by the water surface. However, about half of sunlight's energy is in shorter wavelengths, and its ability to penetrate water is greater, reaching deep below the ocean surface where it is absorbed and converted into heat. Therefore, if nothing is installed below the sea surface, the seawater will be heated over the depth of the light penetration ability, but the deeper this depth, the smaller the temperature rise of turbid water due to sunlight. This device is installed below the sea surface and has the function of blocking light passing through the seawater and converting it into heat.The heated seawater moves upwards due to convection, so the location where this device is installed The upper part is heated, and the lower part is not exposed to sunlight, so the temperature is lower than if nothing was installed. The present invention also has the function of using this tomb as a burial mound to suppress the mixing of seawater between the upper and lower parts and to maintain the temperature difference between the two.

This principle will be explained using experimental results as examples.

In the experiment, the width was 30cm x 30cm and the depth was 48cm.
Water was filled in a container, and a 500W reflector lamp was lit just above the water surface to heat the water surface. As a light energy absorber, a wire mesh coated with black was placed at a position 8 cm below the water surface, and the temperature difference between the upper and lower sides was measured over time. As a result, when the wire mesh was installed, the temperature difference was 3.5°C at maximum and 2.5°C on average compared to when it was not installed.
It was found that the temperature increased by 7°C, thus confirming the blind movement property of the present invention.

In this way, the Zero Engine can heat the seawater above the location where it is installed, but this method of heating seawater with such a simple structure is completely unprecedented.

The present invention, which effectively heats seawater, can be applied to both ocean-ocean temperature difference energy utilization technology and freshwater production technology, which are currently being developed.

[Brief explanation of drawings]

Figure 1 is a diagram of the working principle of this invention. Figure 2 is an elevation view. Figure 3 is a perspective view (a) and (b) respectively indicate that the heat receiving body is (a) Example of lattice shape with fins (b) Example of a finless perforated platefish 1 is a solar heat receiver 2 is the solar heat receiving fin

Claims (1)

[Claims] A solar heat receiving body (1) immersed below the sea surface for the purpose of heating the seawater above the immersed position, and a solar heat receiving fin (2) attached to it.