JPS60103252A - Heat pipe type solar heat collector - Google Patents

Abstract

PURPOSE:To make a whole pipe function effectively as an evaporating part of a heat pipe by distributing about evenly a working fluid to the whole of heat collecting pipes, by providing a header pipe for acceleration of flow division by connecting the same in a communicating state with the lower edge of the heat collecting pipe in a state meeting at right angles with each other. CONSTITUTION:The lower edge of each of heat collecting pipes 1, that is, the pipe edges on eaves side is connected in a communicating state with a common header pipe 5 for acceleration of flow division arranged in a state meeting at right angles with the heat collecting pipe 1. With this construction, the header pipe 5 for the acceleraion of the flow division, the heat collecting pipes 1 and a condensation header pipe 3 constitute a part of a vacuum closed container as a part of a heat pipe. Even if a little inclination is generated in a mounting state of a heat collector, a working fluid streamed down along any of the heat collecting pipe 1 is distributed in about even state to the whole of the heat collecting pipes 1 by the header pipe 5 for the acceleration of the flow division. It does not happen, therfore, that the working fluid becomes partial to the specific heat collecting pipe 1 and becomes insufficient to the other pipe 1 for dryness.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to solar heat collectors, particularly those of the heat pipe type.

BACKGROUND ART Recently, a header-type solar heat collector is known as a heat pipe type solar collector.

That is, as shown in Fig. 1, a plurality of heat collecting pipes (1) arranged in parallel are placed in heat conductive contact with a heat collecting plate (2) or inserted into a heat insulating glass pipe. One end of the side is connected in a continuous manner to the circumferential wall of one condensing header pipe (3) arranged perpendicularly to these, and these are constituted into a closed container, and a working fluid is sealed inside to form the heat collecting pipe. (1) is an evaporator, and the header (3) is a condensing part, forming a single heat pipe that operates as a condensing part, and a heat medium circuit is attached to the inside or outside of the header pipe (3). Waterway (
4) is set in a heat transfer contact state to form a heat exchange part (B), and solar heat energy is transmitted from the heat collecting part (Δ) to the heat medium.

However, J′3 in the above J: Eel type solar heat collector.
In addition, if an error occurs in the iiQ stable angle on the roof surface, that is, as shown in Figure 1, the angle mark (θ) (usually is 1
degree or less. ), there was a possibility that the working fluid would shift to one side within the heat pipe. That is, the working fluid is evaporated in the heat collecting pipe (1), transferred to the condensing header pipe (3), and condensed by releasing latent heat. The heat collecting pipe (1) shows a tendency to flow easily toward one end as shown by the arrow (A) due to the slope, and as a result, the heat collecting pipe (1) gradually moves to the lower position.
A large amount of working fluid is concentrated in the heat collecting pipe (1) at the higher position, and the amount of working fluid becomes insufficient in the heat collecting pipe (1) at the higher position, which reduces the heat transport efficiency of the heat pipe as a whole, and ultimately reduces the heat collecting efficiency. There was an a3 that called low 1.

The present invention aims to solve the above-mentioned problems, and embodiments thereof are shown in FIGS. 2 to 4.

First, in the embodiments shown in FIG. 2 and FIG. 3, the reference numerals in the figures are the same as those of the conventional product shown in FIG. The difference from the product is that the lower end of each heat collecting pipe (1), that is, the pipe end on the eave side,
The heat collecting pipe (1) is connected to a common header pipe (5) for promoting diversion which is disposed perpendicularly to the heat collecting pipe (1). Therefore, this header pipe (5) for promoting branch flow also constitutes a part of the vacuum sealed container as a part of the heat pipe together with the heat collecting pipe (1) and the condensing header pipe (3), and both ends of the pipe are of course sealed. C
It is something that exists.

In the IJ, by installing the header pipe (5) for promoting diversion, even if there is a slight inclination in the installed state of the heat collector, the operation flowing down through one of the heat collecting pipes (1) will be prevented. The fluid is distributed to all the heat collecting pipes (1) in a substantially even manner by the header pipe (5) for promoting flow division. Therefore, it is possible to prevent the above-mentioned disadvantages in which an excessive amount of working fluid is concentrated in a particular heat collecting pipe (1) and the working fluid becomes insufficient and depleted in other heat collecting pipes (1).

However, even in the above case, in order to ensure the reliability of the operation of the P1 pipe, it is advantageous to set the amount of hydraulic fluid to be sealed to about 20 to 30% of the total capacity of the heat pipe. When it is as low as 7% or less, all heat collecting pipes (
1) is undesirable because it may not be possible to distribute a sufficient amount of working fluid.

Another embodiment shown in FIG. 4 has a header for promoting diversion (5) similar to the embodiment described above, as well as a condensing header pipe (5).
Both pipe ends of 3) and both pipe ends of the header pipe for promoting branch flow (5) are connected to each other via a bypass pipe for promoting return (6).

In this case, due to the inclination of the condensing header pipe (3), some of the working fluid that may flow down and concentrate at the end of the pipe, causing a pool, can be reliably transferred to the header pipe (5) for promoting diversion. By returning all of the working fluid (a), it is possible to operate more effectively.

As explained above, this invention consists of a plurality of heat collecting pipes (1) arranged in parallel and a condensing header pipe (3) whose one end is connected to the peripheral wall, from the heat collecting part (A> In a solar heat collector configured with a heat pipe that transports solar energy to a heat exchange part (B) to a heat medium, the other end of the heat collection pipe (1) is arranged orthogonally to the heat collection pipe (1). It has a configuration in which it is connected to a common header pipe (5) for promoting diversion.

Therefore, as mentioned above, even if there is a slight error in the inclination of the heat collector, the heat collector pipe (1) of Zube-C
By constantly distributing the required working fluid in a substantially even manner, the metal tube can effectively function as the evaporation section of the heat pipe. Therefore, the defects described at the beginning do not occur, and the efficiency of collecting solar thermal energy can be maintained satisfactorily over a long period of time.

[Brief explanation of the drawing]

Figure 1 shows an example of a conventional heat pipe type solar collector.
FIG. 2 is a plan view showing an exaggerated inclination in the installed state, FIG. 2 is a plan view showing an embodiment of the present invention in a state corresponding to FIG. 1, and FIG. A sectional view taken along the line -■, and FIG. 4 is a plan view showing another embodiment. (1)... Heat collecting pipe, (3)... Condensing header pipe, (
4)...Water pipe, (5)...Heragoo tube for promoting diversion, (6)...Bypass pipe for promoting return, (Δ)...Heat collecting section, (B)...Heat exchange Department. that's all

Claims (1)

[Claims] A heat pipe that transports solar thermal energy from the heat collection part to the heat exchange part to the heat medium is configured by a plurality of heat collection pipes arranged in parallel and a condensation header pipe whose one end is connected to the peripheral wall. The heat pipe type solar heat collector is characterized in that the other end of the heat collecting pipe is connected in communication with a common header pipe for promoting diversion disposed perpendicularly to the heat collecting pipe. Pipe type solar heat collector to H1.