RU50287U1 - SOLAR POWER BATTERY TANK BATTERY - Google Patents

Abstract

Storage tanks of solar power plants are used in solar technology as part of solar hot water supply systems to accumulate solar-heated water coming from the solar collectors of the installation and maintain its high temperature. The storage tank contains a rectangular metal tank for water and thermal insulation in the form of a layer of heat-protective material, covering the tank from all sides, the design of the storage tank and the materials used in it provide:

- high thermal efficiency of the solar power plant due to the additional heating of water in the tank;

- resistance to atmospheric influences of the environment;

- satisfactory manufacturability and cost. This technical result is achieved due to the fact that:

- thermal insulation of the inventive storage tank is a casing made of plates of solid, translucent weather-resistant plastic, for example, transparent honeycomb polycarbonate plastic;

- between the upper and lateral surfaces of the tank and the casing there is an air gap, for example, 4 mm wide;

- the upper and outer side surfaces of the tank are painted black.

The transparent walls of the casing easily pass the short-wave solar radiation that heats the tank, but practically do not pass the long-wave thermal radiation of the heated tank, resulting in a greenhouse effect in the gap between the casing and the tank, which in combination with the black color of the irradiated surfaces provides intense heating of the water in the tank and thereby increases the thermal characteristics of the solar power plant. The heat-shielding properties of the plastic used ensure high water temperature in the tank, and its hardness and resistance to weathering does not require protective shells, which simplifies the design of the inventive battery tank, makes it more technological and reduces its cost. The manufacture of the storage tank is achieved by conventional methods of bending and welding sheet metal, machining plastic sheets and assembling them using screw pairs.

Description

Storage tanks of solar power plants are used in solar technology as part of solar hot water supply systems to accumulate solar-heated water coming from the solar collectors of the installation and maintain its high temperature.

Storage tanks of solar power plants with rectangular metal tanks and thermal insulation in the form of a layer of heat-shielding material covering the tank on all sides are known (see, for example, N.V. Kharchenko “Individual Solar Installations.” M. Energoatomizdat, 1991, fig. .20, p. 46).

This design contains a rectangular metal tank for water and thermal insulation in the form of a layer of heat-shielding material covering the tank from all sides, thus coincides with the claimed model according to the main feature and therefore is taken as a prototype.

The storage tank along with the accumulation of hot water and maintaining its high temperature should provide the following technical result:

- maximize the achievement of high thermal efficiency of the solar power plant;

- reliably withstand the atmospheric effects of the environment;

- have a satisfactory manufacturability and cost.

The following circumstances hinder the receipt of the required technical characteristics sufficiently from the prototype:

- the prototype uses fiberglass, mineral wool or other similar lightproof heat-insulating materials that exclude direct exposure of the tank to the sun with the aim of using their energy to additionally heat water through the walls of the tank, thereby limiting the thermal efficiency of the solar power plant ( the amount of thermal power taken from the area occupied by the installation);

- these materials are hygroscopic and, as they absorb atmospheric moisture, lose their heat-insulating properties, in addition, they are subject to mechanical damage (shedding, scuffing, delamination, changing shape, etc.), therefore, to protect them, a sealed metal shell is required, which, being in the open air itself requires expensive anti-corrosion coatings;

- All this, taken together, complicates the design of the battery tank, reduces manufacturability and increases its cost.

The inventive model provides the required technical result, the essence of the claimed model is determined by the following set of features:

- thermal insulation of the model is a casing made of solid, translucent plates. weather-resistant heat-insulating plastic, for example, transparent honeycomb polycarbonate plastic, the transparency of the plastic provides direct irradiation of the tank with sunlight, the energy of which additionally heats the water through the irradiated walls of the tank;

- between the upper and side surfaces of the tank and the casing there is an air gap, for example, 4 mm wide, which increases the intensity of heating the water in the tank;

- the outer and side surfaces of the tank are painted black, which contributes to more intensive absorption of solar energy coming through the transparent walls of the casing and increases the degree of heating of water in the tank;

- the heat-shielding properties of plastic ensure the preservation of a high temperature of water in the tank;

- the hardness and resistance of the plastic used to weathering does not require any protective devices (shells), which simplifies the design of the claimed model, makes it more technological and reduces its cost.

Tests and studies of solar power plants with the claimed storage tanks have shown that they confidently provide the required technical result.

The drawing illustrating the description of the utility model shows:

rectangular metal tank 1, the upper and side walls of which are painted black. The tank is filled with hot water 2 coming from the solar collectors of the installation, thermal insulation 3 in the form of a casing made of solid translucent plates, weather-resistant heat-insulating plastic. There are air gaps between the upper and lateral surfaces of the tank and the casing 4. The transparent walls of the casing easily pass the short-wave solar radiation, which heats the tank, but practically do not allow the long-wave thermal radiation of the heated tank, thus creating a greenhouse effect in the gap, which in combination with black the irradiated surfaces of the tank significantly increases the intensity of water heating and the thermal characteristics of the solar power plant.

The practical implementation of the claimed model is achieved by conventional methods of bending and welding of sheet metal, machining plastic sheets and their metalwork using screw pairs.

Claims (1)

A storage tank of a solar power plant containing a rectangular metal water tank and thermal insulation in the form of a layer of heat-shielding material covering the tank on all sides, characterized in that the thermal insulation in it is a casing made of solid translucent weatherproof insulating plates plastic, while between the upper and side surfaces of the tank and the casing there is an air gap of 4 mm wide, and the upper and outer side The tank is black.