JP2003340439A - System realizing multiple management of fresh water making business by solar heat and power generation business by solar cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems of a low energy density and non-cost- effectiveness while both of fresh water making and power generation utilizing solar heat are heretofore practiced. <P>SOLUTION: Heat receiving segments to collect the solar heat are formed as heat receiving plate units and the solar heat is inexpensively collected in a large amount by lining up a number of such units. A distillation apparatus is formed as a separate unit. Simultaneously, solar cells are stuck to the heat receiving surfaces of the heat receiving unit plates of a desalting apparatus to effectively utilize the sunlight, by which the cost performance over the entire part of the apparatus is improved. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION [0001] The present invention produces fresh water from seawater, sewage, and the like using solar heat, and also generates power using the same sunlight.
In a large scale situation, large power can be obtained. Hydrogen can also be obtained by electrolyzing water with this high power.
You can also get water for agriculture. 2. Description of the Related Art Conventionally, freshwater desalination using solar heat and power generation using solar cells have been existing, but each of them has been performed only on a very small scale in terms of cost. .
For example, freshwater desalination using a basin-type still has been well known for a long time, but there were problems such as poor efficiency due to its structure, difficulty in increasing the scale, and maintenance management of the glass surface. In addition, power generation by a solar cell was performed at a small scale by attaching radio waves to a light receiving plate. [0003] The cost performance is improved by integrating desalination by solar heat and power generation by sunlight into a single unit, so that the business can be realized on both large and small scales. [0004] A freshwater desalination apparatus utilizing solar heat is divided into a heat receiving portion and a still portion, and each is unitized. That is, the heat receiving portion is, for example, a unit having a depth of 3 cm, a width of 100 cm, and a length of 100 cm.
A raw water inlet and an outlet are attached to this unit, and many units are connected, and the temperature is gradually increased so that the raw water becomes hot water in the last unit. The unit is made of metal. By making this unit, the solar light receiving heat receiving area can be easily increased at a low cost. Then, by selecting the scale of the light receiving and heat receiving unit and the distilling unit, it is possible to freely select a large scale or a small scale of the business. Then, by attaching a solar cell to the light receiving and heat receiving surface, it is possible to achieve both desalination of raw water and solar power generation by solar heat. This power generation can also be used on a small scale to increase the efficiency of raw water desalination, and on a large scale, the potential for large-scale power generation in coastal deserts increases when solar cell costs fall. Open. That is, not only large-scale desalination but also large-scale power generation can be opened, and seawater can be electrolyzed by this electricity generation to obtain hydrogen resources. DESCRIPTION OF THE PREFERRED EMBODIMENTS On a remote island, about 100 solar light receiving hot plate units are arranged in a small area of about 10 m × 10 m,
The raw heat water is led to a separate distiller installed nearby and is replaced with fresh water. On a large scale, it is a coastal desert. For large-scale fresh water production and large-scale power generation, solar light receiving and receiving plates are lined up 500 m square, and a distilling unit is also located nearby. Water production and power generation are performed. Quantifying this,
At present, a freshwater desalination unit using only solar heat with a light receiving surface of 5, ² m ² is on sale. The desalination rate of this unit in the tropics ranges from 50 l / day to 70 l / day. That is, if 100 sheets of the heat receiving unit plate 1 m ² are placed, simply compare and assuming that the performance of the still is the same, 50 l × 100 ÷ 5.2 ≒ 1000 l, about 1 ton of water is obtained per day there's a possibility that. Of course, the side and back surfaces of the solar heat receiving plate unit are covered with a heat insulating material. And in power generation plane, the solar cell 1 m ² per 13
Since it is 00W / H, 80% of heat receiving and light receiving plate units
Assuming that the area is a solar cell, 100 m ² × 130 W × 0.8 = 10,400 W About 10 kW / H of electric power can be used for freshwater desalination.
Of course, there is an option to use only solar power and not use electricity. If this is simply replaced with a 500 m square, fresh water will be 1 ton x 500 x 500 x {10/10 = 2,500 ton / day power 10 kw x 500 x 500/10/10 = 2,5000 kW / H, and in remote islands In the desert, it is large enough for business. According to the present invention, water and electricity are supplied inexpensively to remote islands and desert areas where water is needed, and to areas where electricity is needed.

[Brief description of the drawings] [Figure 1] Plan view of solar heat, solar heat receiving / light unit [Fig. 2] 〃 側面 Side view [Explanation of symbols] (A) Raw water inlet (b) Raw water outlet (C) Solar cell (d) Main body

Claims (1)

Claims: 1. A raw water heating portion of a solar water desalination machine is a unit independent of a distiller, and this unit (for example, a depth of 3 cm,
Add an inlet and an outlet to the vertical (100cm, horizontal 100cm), connect this unit in multiple stages, gradually raise the temperature (raw water) for each unit, and guide the hot water of the last unit to the still to produce fresh water However, a solar cell is attached to the solar light receiving surface of this unit so that power is generated at the same time.