GR20190100215A - Lamella for solar collector's heat transfer - Google Patents

Abstract

The invented solar collector’s heat transfer lamella (3) multiplies the contact surface (4) {+ (6-1) + (6-2) + (5-1) + (5-2)} Fig.1 of a solar collector. The invented heat transfer lamella 3 consists of a thermally conductive lamella mounted on the back of the solar energy absorption surface (1) on the tube (2) and directly contacts the surfaces (6). -1) + (6-2) of said lamella (3) with the collecting surface (1) but also with the surfaces (5-1), (5-2) in order to achieve faster and uniform high-temperature heating of the liquid (7) circulating in the tube 2 of whatever solar collector of natural or forced circulation.

Description

DESCRIPTION

"Heat transfer foil of solar thermal collectors<">

"Solar thermal collector heat transfer foil" (3) refers to a thermally conductive foil which is placed on the inner side of the solar energy absorption collecting surface (1) on the tube (2) of a solar thermal collector, but in contact with the collector surface (1) for absorbing solar thermal energy, in a solar thermal collector producing hot liquid.

The solar thermal collectors until today consist of the casing, the glass, the insulation and the collecting surface of the solar thermal energy (1) with the pipes (2) through which the liquid (7) passes in order to be heated, with the pipes attached ( 2) onto the collecting surface (1) with a seam at a single very fine point of contact (4) along the circumference of the tubes. The heating of the liquid (7) inside the pipe (2) is done through the contact of the collector surface (1) with the pipe (2), so the larger this surface, the faster and more heat without loss will pass through the pipe (2) ) from the solar energy that falls on the collector surface (1) which converts it into heat.

Solar hot water collectors are still used to produce hot water either for domestic use in solar water heaters, or in forced circulation solar thermal systems for professional use.

In the solar collectors up to now Fig. 2 in section the liquid (7-a) circulating in the hydraulic piping was heated inductively only at the point contact (4-a) of the pipe (2-a) with the absorbing surface (1-a) , with the result that the back part of the pipe (5-1) is considerably colder than the front part (4). The energy efficiency result of the solar thermal collectors had great room for improvement since they had large thermal losses due to the very small surface (4-a) of heat induction of the generated solar thermal energy between the tube (2-a) and the absorbing surface (1-a ).

The aim was to increase the induction surface without changing the production process of the solar thermal collectors which is automated today in already existing spaces and without raising the cost of building the new and more efficient solar collectors to great heights.

The "Solar Thermal Collectors Heat Transfer Plate<">(3) consists of a plate which is attached to the back side of the absorbing surface of solar thermal energy, which is placed in one version snap-on due to the clips (5-2) on the hydraulic pipes as a spare part in any solar thermal collector in contact with the absorbing surface (1). Its application method makes it easy to place on any type of collector.

The innovation of the "Solar Thermal Collectors Heat Transfer Plate" (3) concerns the faster and greater temperature increase inductively uniformly throughout the circumference (5-1), (5-2) and (4) of the hydraulic pipe(2) and not only at the point of contact (4) that existed until now. And through the larger contact surface of the plate (3) with the absorbing surface (1) it can achieve faster and greater absorption of solar thermal energy without thermal losses that existed until now due to the single point contact (4) or the distance of the rear part of the pipe (5-1) from the absorbent surface (1) Fig. (2).

Section of solar thermal collector Fig. (1). The surfaces (6-1), (6-2) of the plate (3) and the point (4) are inductively heated by their contact with the absorbing surface (1) of the solar thermal energy due to the solar thermal radiation impinging on it and they in turn heat quickly, inductively uniformly throughout the circumference of the hydraulic pipe (2).

In this way, the thermal solar energy absorbed in the absorbent surface (1) is distributed evenly throughout the circumference of the pipe (2) in the surface (5-1), (5-2) and at point (4), increasing the final absorbed energy in all the liquid that passes through the tube (2) and not only at the point of contact (4).

Until now, the liquid that was on the side of the absorbent surface (1) near point (4) was heated more, leaving the back side of the tube cold, while with the<">Heat transfer plate of solar thermal collectors<">(3) it is heated evenly at a high temperature the pipe and by extension all the liquid (7). This results in a faster and higher than before liquid exit temperature from pipe (2) since the surface (1) in contact with pipe (2) is larger (5-1)+(5-2)+4 due to induction, i.e. heat transfer through the thermally conductive material of (3) by itself until now point surface (4).

Example of application of the Heat Transfer Plate of solar thermal collectors<">.

We apply the thermally conductive sheet (3), for example by pressure either with our hands or with a tool, so that it snaps onto the tube (2) and the surfaces (6-1), (6-2) come into contact with the absorbent surface (1) and the surfaces (5-1), (5-2) with the pipe (2).

Claims (6)

"Heat transfer foil of solar thermal collectors" I. The "Solar thermal collector heat transfer plate" (3) consists of a thermally conductive plate (3) which is attached to the back side of the solar thermal energy absorbing surface (1) of a solar thermal collector, and placed on its hydraulic pipes (2), on any solar thermal collector, so as to bring into contact, apart from point (4), the surfaces (6-1)+(6-2) with the absorbing surface of solar thermal energy (1) but also the surfaces ( 5-1), (5-2) of the thermally conductive plate (3) with the pipe (2) and aims to multiply the area that comes into contact between the collector surface (1) and the pipe (2) and thus through of the larger surface that the pipe (2) contacts with the collector surface (1), the pipe (2) absorbs more solar thermal energy from the collector surface (1) to heat to a higher temperature faster without much thermal loss, which he had until now a due to the one and only point of contact (4), but also more uniformly inductively from the surfaces (6-1) and (6-2) through the periphery (5-1), (5-2) and (4) of tube (2), the liquid (7) circulating inside the tube (2) of a natural or forced circulation solar thermal collector, (previous state valid until today Drawing (2), example of a new state after the installation of the “Heat Transfer Plate solar thermal collectors" Scheme (1)). 2. The "Heat transfer plate of solar thermal collectors" (3) according to claim 1 is characterized by the fact that it can be placed in any kind and type of solar thermal collector, either natural circulation or forced circulation, open or closed hydraulic circuit. 3. "Solar Thermal Collectors Heat Transfer Plate" (3) according to claim 1 is characterized in that it inductively transfers the absorbed solar heat from the absorbing surface of solar thermal energy (1) through the surfaces (6-1) (6- 2) of the plate (3) and around the circumference of the tube (2) on the surfaces (5-1), (5-2). 4. The heat transfer plate of solar thermal collectors" (3) according to claim 1 is characterized by the fact that it can be installed either by snapping or sticking or in any other way. 5. The heat transfer plate of solar thermal collectors" (3) according to claim 1 is characterized by the fact that it can be made of any thermally conductive material. 6. "Solar Thermal Collectors Heat Transfer Plate" (3) according to claim 1 is characterized in that by increasing the inductive surface (5-1)+(5-2)+(4) it contributes by positioning it to be uniformly transferred around the circumference of the tube (2) more absorbed solar thermal energy, proportionally increasing the speed of absorption of the solar thermal injection inside the tube (2). temperature but also the temperature of the liquid (7)