JPS5843983Y2 - Solar thermal water production equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a water dispensing device that can mainly extract only water from seawater or water containing impurities using solar heat.

A conventional device of this type is shown in FIG.

In the figure, 1 is seawater or water containing impurities. It is heated by solar heat 3 that enters through a transparent plate 2 such as glass, and evaporates from the water surface 4, and the transparent plate 2 has a relatively low temperature.
Condensation forms on the inner surface of the

The condensed water 5 flows down along the slope of the transparent plate 2, collects in a water collector 6, and is taken out of the evaporation chamber 7.

It is well known that the amount of water evaporation Le (kg/h) in such a device is given by the following equation.

Le= (0,0152V +0.0178) CP
s(θW)-φaPs(θa))A...(1) Here, ■ is the wind speed at the water surface (m/s), Ps is the saturated water vapor pressure mmHg at temperature θ, and θW is Water temperature in °C, θa is air temperature in the evaporation chamber in °C, and φa is relative humidity in the evaporation chamber.

In the conventional water spraying device shown in Fig. 1, the water surface wind speed ■=0, φall, and the thermal resistance of the transparent plate 2 are high, so θW〉
Although it is θa, the difference (θW−θa) is a considerably small value.

Under such conditions, the amount of evaporation Le' is considerably smaller than Le in equation (1), so efficient water supply (water evaporation) is possible.
will not be obtained.

Incidentally, in an experiment using the apparatus shown in Figure 1, θW=
67℃, blue a-63℃, Le' = 0, 6k
It was found that g/h-m2 was obtained.

'According to equation (1), under this temperature condition Le = 0.
It becomes 65'kg/h-m2.

This idea aims to increase the water surface evaporation amount Le given by the relationship of equation (1) as much as possible in order to enable efficient watering.

An embodiment of this invention will be described below with reference to the drawings.

In FIG. 2, 1 is seawater or water containing impurities stored in the lower part of the evaporation chamber 7.

This water is heated by solar heat in the same way as in the conventional water supply device, and the temperature θW rises, and evaporates into the evaporation chamber 7 whose temperature is lower than θW.

This evaporation chamber 7 has a fluid moving device 8 such as a fan or blower.
A circulation path 11 is provided that communicates with the evaporation chamber 7, and the moist air above the evaporation chamber 7 is carried out of the evaporation chamber 7 by a fluid transfer device 8, cooled by a cooler 9 provided in the circulation path 11, and condensed. , a container 1 also provided in a part of the circulation path 11
Stored at 0.

As described above, when the humid air in the evaporation chamber 7 is moved by the fluid moving device 8, a wind speed ■ is generated in the evaporation chamber 7, and the amount of evaporation Le can be significantly increased due to the relationship in equation (1). Can be done.

For example, according to equation (1), it can be seen that even in the case of a weak wind with V of about 2 m/s, approximately 2.7 times Le can be obtained compared to the case of 0.

Furthermore, by cooling the air in the evaporation chamber 7 with the cooler 9 and returning this cold air to the evaporation chamber 7 with the fluid transfer device 8, the temperature θa and the humidity φa in the evaporation chamber 7 are lowered, and these effects are reduced. Since both of these are effective in increasing Le in equation (1), it is possible to provide considerably greater water evaporation, that is, water production performance, than in the conventional type.

In the present invention, as the cooler 9, cooling fins 13 are attached to the outer wall of the circulation path 11, and a fan 12 is installed opposite to the cooling fins 13.
In addition, a part of the pipe line is configured as a coil-shaped cooler 14 in series with this, so that water condensed due to the action of centrifugal force is separated and recovered, so that it has further water evaporation ability. .

As described above, according to this invention, a circulation path is provided to circulate the air in the evaporation chamber, and this circulation path is equipped with a fan and fin cooler and a coiled cooler using centrifugal force. It is equipped with an efficient cooler and a liquid reservoir, and circulates moist air using a fan or blower.
The temperature and humidity inside the evaporation chamber are lowered, and at the same time, wind speed is applied to the water surface of the evaporation chamber, which increases the amount of water evaporation and enables efficient watering.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a conventional solar water production system;
FIG. 2 is a cross-sectional view showing an embodiment of this invention, and FIG. 3 is a cross-sectional view of a cooler used in this invention. In the figure, 1 is seawater or water containing impurities, 4 is evaporation, 7 is evaporation chamber, 8 is fluid transfer device, 9 is cooler, 10 is container,
11 is a circulation path, 12 is a fan, 13 is a fin, and 14 is a coiled cooler. Note that the same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] An evaporation chamber in which seawater or impurity-containing water stored inside is heated by solar heat; a circulation path provided to lead and circulate the air in the evaporation chamber outside using a fan, blower, etc.; and this circulation path. A solar heating system comprising a cooler and a liquid storage container installed in the middle of the solar heat sink, and as the cooler, a finned cooler with a fan and a coiled cooler using centrifugal force are connected in series and used in combination. Water production equipment used.