SU1151783A2 - Absorption periodic-action solar refrigerating plant - Google Patents

Abstract

ABSORPTION HELIOBOLODYLNY INSTALLATION OF PERIODIC ACTION on the author. 661199, characterized in that, in order to increase the cooling capacity, the generator is made with a two-layer glass coating with the possibility of mutual displacement of the layers, on the surfaces of which from the working volume of the generator discretely applied strips of a material reflecting infrared radiation, with an interval between them equal to the width of these bands.

Description

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The invention relates to refrigeration engineering, in particular, to the installation of absorption refrigeration plants of periodic operation, and is a further improvement of the installation according to the main author. No. 661199.

The purpose of the invention is to increase the cooling capacity.

Fig. 1 is a schematic diagram of the proposed batch-cooled helio-cooling unit; Fig. 2 shows the relative position of the glass coatings during the day period of the day; on fig.Z then. however, in the night period of the day.

The absorptive helio-cooling batch plant contains a generator of type 1, a hot box filled with an absorbent, a condenser 2, a receiver 3 of a liquid refrigerant, and an evaporator 4. Generator 1 is connected to the input of a condenser 2, the output of which is connected to the receiver 3. The lower part of receiver 3 is connected to one end of the evaporator 4, the other end of which is connected to the upper part of the receiver 3. The lower part of the generator 1 is connected to the receiver 3 by a pipe line 5, on which the stop valve 6 is installed. Shut-off valve b and has a bypass line, on which along the refrigerant, the check valve 7, the additional receiver 8 of the liquid refrigerant and the thermostatic valve 9 are installed in series, the power cartridge of which is located at the outlet of the upper part of the generator 1. The generator 1 has an outer 10 and an inner 11 glass coating. On the generator side 1, transparent selective layers 12 are applied on the surfaces of the glass coatings 10 and 11, made in the form of parallel strips with the same spacing between them equal to the width of the strips. Selective layers 12 can be made, for example, of indium oxide, which has a transmittance of 0.85, a reflectivity of 0.9, with respect to infrared radiation, corresponding to an emission temperature of the generator surface of 1 300-400 K.

The inner glass coating 11 is mounted in the hinge housing 13 so as to be movable with respect to the outer glass coating 10.

Absorption solar cooling installation of periodic action works as follows.

is daytime the sun's rays fall on generator 1, pass through glass coatings 10

and 11 and heat the absorbent. In the generator 1, the process of desorption of refrigerant vapors takes place, which through the pipeline get into the condenser 2. In the condenser 2, the refrigerant vapor is cooled and liquefied. From the condenser 2, the refrigerant enters the receiver 3, where it accumulates in the daytime. At this time, the evaporator 4 is filled with a liquid refrigerant. The thermostatic valve 9 adjusts to a certain temperature. When this temperature is exceeded, the valve .9 opens, and the liquid refrigerant from the additional receiver 8 is drained to the bottom of the generator 1, in which due to capillary forces it rises along the absorbent, protecting it from overheating.

When sunlight hits the generator 1, its absorbing surface, heating itself, begins to emit in the wavelength range of more than 3 microns. The long-wave radiation of the absorbing surface of the generator 1 reaches the glass surfaces 10 and 11 and, reflecting from the staggered bands selective layers, 12, falls again onto the absorbing surface of the generator 1. As a result, heat loss to the environment decreases, the temperature inside the generator 1 rises and the intensity of the desorption process of pairs increases This leads to an increase in the level of liquid refrigerant accumulated in the receiver 3. This ensures an increase in the amount of refrigerant involved in the refrigeration cycle of the installation, which increases its efficiency.

At night, the surface of the generator 1 cools down, the pressure inside it decreases and is transmitted through condenser 2 and receiver 3 to evaporator 4, in which refrigerant evaporates, accompanied by refrigeration action. Refrigerant vapor through receiver 3 and condenser 2 are fed through pipeline to generator 1, where absorbed by the absorbent. The process of absorption of refrigerant vapor is accompanied by heat generation. The glass coating 11, which is hinged in the housing, is moved parallel to the glass coating 10 to the distance of one interval between the strips of the selective layer 12, thereby ensuring the corridor placement of the strips and the passage of infrared radiation to the surrounding environment. Thus, the necessary heat removal from the absorption zone in the generator at night is provided.

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Claims (1)

ABSORPTION HELI-REFRIGERATING INSTALLATION OF PERIODIC ACTION by auth. No. 661199, characterized in that, in order to increase cooling capacity, the generator is made with a two-layer glass coating with the possibility of mutual movement of layers, on the surfaces of which, from the working volume of the generator, strips of material reflecting infrared radiation are discretely applied with an interval between them equal to the width these bands.