PL240831B1 - Receiver of the high temperature heat - Google Patents

Description

PL 240 831 B1

Description of the invention

The subject of the invention is a high-temperature heat receiver for use in a system concentrating solar radiation, used e.g. for the production of cold in sorption coolers, heating utility water, rooms or supplying various technological processes, including processing in gastronomy, drying of solid fuels.

There is a known from the Polish application P.359378 a receiver of solar radiation energy, in the form of a solar collector used for heating rooms, supplying domestic water with heat or other applications. The collector according to the invention is made of a solar radiation absorber placed on an insulation layer in the form of mineral wool and polystyrene. The collector is protected from the front by a glass and is closed with a profile with an internal seal. The absorber is made as a rectangular element, pressed out of galvanically anodized steel strips with a number of ribs. The known absorber has a longitudinal channel in which a pipe is placed, through which the heating medium flows.

A microfluidic heat receiver for solar energy centers is known from the patent description PL 218417 B1. The receiver according to the invention makes it possible to obtain steam with optimal turbine power supply parameters. The top layer of the known microfluidic receiver is a plate that concentrates the sun's rays. The main working part of the receiver according to the invention is a layer containing a module with micro-jet nozzles. At the bottom of the receiver there is a collector that supplies power to the device. A collector for collecting the high-temperature steam and directing it to the turbines is positioned in the receiving layer between the focusing plate and the layer containing the micro-jet nozzle module.

It is known from the European patent application EP2757331 A1 A system based on a parabolic mirror, linearly concentrating solar radiation and a heat receiver, in the form of a tube placed in the focus of focused sunlight. The receiver is made of a pipe filled with a working medium placed inside a larger, transparent pipe. The air between the pipes is removed to minimize heat loss.

It is known from the US patent application US 4,499,893 (A), a receiver of high-temperature heat resulting from the concentration of solar radiation by means of many mirrors in high-power installations. A known receiver is placed on a solar tower and serves to heat a gas-form heating medium in which submicron heat-absorbing particles are suspended.

A solution for the absorption and conversion of solar radiation into heat is known from the American patent US9206997 (B2), in which the receiver trough-shaped absorber is directed directly to the solar disk, converting solar radiation energy into low-temperature heat, in which the working medium is air.

The existing devices are used to receive low-temperature or high-temperature heat in high-power installations. The object of the solution according to the invention is to enable the concentrated solar radiation to be absorbed and to receive high-temperature heat in low-power systems.

The essence of the high-temperature heat receiver consisting of a bowl-shaped absorber and a working medium that fills it is that the absorber has the shape of a semicircular bowl closed at the bottom with a cover, the absorber has walls attached to the inner semicircular surface of the absorber bowl and has lugs, while it has circular and ellipse-shaped projections arranged inside the absorber parallel to the internal walls, while the circular projections are located near the shorter edges of the internal walls, while the elliptical-shaped projections are positioned longitudinally in relation to the internal walls in the direction of flow of the working medium.

Preferably, the absorber is aluminum.

Preferably, the heat-resistant medium is thermal oil.

The subject of the invention is shown in the embodiment in the drawing, in which Fig. 1 shows a longitudinal section of the heat receiver, and Fig. 2 shows the heat receiver in a perspective configuration.

The high-temperature heat receiver according to the invention is made of a spherically convex absorber 1 in the form of a bowl, having inside at least three walls 2, between which there is a working medium 8 in the form of thermal oil. Between the sides 2,

Claims (3)

The projections 3 are connected to increase the heat transfer surface. The walls 2 and the projections 3 of the receiver direct the flow of the working medium 8 and the heat exchange between the absorber 1 and the medium. Due to the extensive system of walls 2 and projections 3, the flow path of the medium inside the heat receiver is extended and the heat exchange surface is increased. Attached to the absorber 1 are stubs 4 for the inlet and outlet of the working medium 8. The absorber 1 with walls 2 and splines 3 is closed with a cover 5, fixed with screws 6, and the connection is secured with a gasket 7. The absorber 1 is covered from the outside with a black layer absorbing solar radiation 1a. The absorbent surface can be darkened by e.g. applying a layer of black paint resistant to high temperatures, a layer of a mixture of black paint and soot, anodizing in a sulfuric acid solution, use of black chrome. The absorber 1 is isolated with mineral wool placed on the entire surface of the cover 5 and on the outer, not covered with a paint layer, part of the absorber 1. The convex surface of the receiver is an absorbing layer of focused solar radiation. The absorber 1 is positioned at right angles in front of the focus of the rays so that the radiation strikes its entire absorbing surface. The convexity of the absorber 1 allows to correct the inaccuracies in the location of the receiver in the focal point of the system concentrating the solar radiation and inaccuracies in the control of the pump operation, not shown in the drawing. The receiver converts the energy of solar radiation into high-temperature heat, which in turn is received by the working medium flowing inside it 8. Heat losses are reduced by means of mineral wool. The convexity of the absorber 1 increases the heat receiving surface and the volume of the working medium 8 flowing inside the receiver. Additionally, the cross-section of the protrusion 3 may take the shape of a circle or an ellipse. The splines 3 with a circular cross-section are located in the area of changing the flow direction of the working medium 8, while the splines 3 with an ellipse cross-section are arranged along the inner walls 2 in the direction of flow of the working medium 8. Such arrangement of the splines 3 limits the flow resistance of the working medium 8 and at the same time allows for washing their surface by the working medium 8 as much as possible, increasing the efficiency of the receiver. Drawing symbols: 1 - absorber 1 a - darkened absorbent surface 2 - walls 3 - protrusions 4 - nozzles 5 - cover 6 - bolts 7 - gasket 8 - working medium Patent claims 1.High-temperature heat receiver composed of a bowl-shaped absorber and a working medium filling it, characterized in that the absorber (1) has the shape of a semicircular bowl closed at the bottom by a cover (5), the absorber (1) has walls (2) ) attached to the inner semicircular surface of the absorber bowl (1) (5) and has lugs, and it has circular and elliptical lugs (3) arranged inside the absorber (1) parallel to the inner walls (2) with circular lugs (3) are located near the shorter edges of the inner walls (2), while the ellipse-shaped protrusions (3) are positioned longitudinally in relation to the inner walls (2). 2. The receiver according to claim 3. The absorber as claimed in claim 1, characterized in that the absorber (1) is aluminum. 3. The receiver according to claim The method of claim 1, characterized in that the heat-resistant operating medium (8) is a thermal oil.