SU1583703A1 - Heat conduit - Google Patents

Abstract

The invention can be used to transport coolant. The purpose of the invention is to save heat and increase the reliability of heat supply. The supply pipeline (TP) 1 is located inside the heat-insulated reverse TP 2. The ratio of internal diameters of TP 2, 1 is √2. TP 1 is made of non-metallic low-heat conductive material, which reduces the temperature difference between the source and the consumer. The outer waterproofing layer 3 prevents external corrosion of TP 2. Layer 4 reduces heat loss to the environment. 1 hp f-ly, 1 ill.

Description

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The invention relates to pipelines used in a power system for transporting a heat transfer medium, for example, hot water or steam, from a heat source to a consumer and vice versa, and can be used in all public households that consume heat energy.

The purpose of the invention is to save heat and increase the reliability of heat supply.

The goal is achieved by the fact that in a heat conduit containing supply and return pipelines, the supply pipe is located inside the heat-insulated non-return pipe and is made of a non-metallic material with low thermal conductivity, the ratio of the diameters of the return and feed and dn pipelines being do / d /, .

This is due to the fact that the proposed construction should preserve the equality of the cross-sectional areas for the passage of supply and return heat carriers, i.e., where So is the cross-sectional area for the return heat carrier passage; Sn is the cross-sectional area for the passage of the heat transfer fluid

In the proposed heat pipe, the feed pipe is located inside the return pipe. Consequently, the cross-sectional area of the return pipe must be equal to So So + Sn. But therefore

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diameter ratio, gj2. The ratio of the diameters is equal to do / dn.

The preservation of this ratio is necessary because with an increase in the cross section of the return pipeline there is an unjustified waste of materials, and with a decrease in the cross section, the velocity of the heat transfer medium increases, which increases the hydraulic resistance of the pipeline.

The proposed design of the heat conductor provides a significant reduction in heat loss to the environment (40-45%) by reducing the outer surface area of the heat conductor by the value of LSQ2 - l / 2) or 0, where dn is the diameter of the supply pipe, and reducing the temperature difference, since The supply pipe with a heat carrier having a high temperature is not in contact with the environment (ground or air), but with a heat carrier having a temperature of 10 ° C (the temperature difference is 25-100 ° C between the heat carriers)

Losses of the coolant into the environment through seals and fistulas from the supply pipeline are completely eliminated, since leaks enter the return pipeline, which is diverted to the heat source. Due to this, the consumption of make-up water is reduced, water-purification materials are saved, and

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the pipeline can be spent at a good time for the consumer and the boiler room, for example in summer, KOI and reduced heat consumption. This significantly increases the reliability of heat supply during the winter period of time.

The difference between the proposed heat pipe and the known one is that in fire tube boilers and pipe type heaters, materials with a high thermal conductivity are used to increase the heat flow between the coolant and the medium being heated or cooled. In the proposed heat conduit, materials with a low thermal conductivity are used to reduce, to the minimum possible, heat exchange between the fluid flows in the inner and outer ducts.

FIG. I shows the heat conductor, general view, in section; in fig. 2 shows section A-A in FIG. one.

The heat pipe contains a supply pipe 1, which is located inside the return pipe 2. On the outer surface of the return pipe 2, there is a waterproofing layer 3 on which the heat insulating layer 4 is applied. Separate parts of the supply pipe 1 are connected by a sleeve 5, which also supports it.

The heat pipe works as follows.

The coolant flows through the supply line 1 to the consumer, after which, giving heat to the consumer, returns to the heat source through the return line 2. In this case, the supply line 1 contacts not with the environment, but with the heat transfer medium that gave the heat is lost to the environment.

The use of a non-metallic material with a low thermal conductivity in order to reduce the temperature difference between the heat transfer medium between the source and the consumer allows the consumer to deliver a greater amount of heat. The outer waterproofing layer 3 prevents external corrosion of the pipeline 2, and the thermal insulation layer 4 reduces heat loss to the environment.

Claims (2)

1. A heat pipe containing a heat-insulated return pipe and an in-feed pipe located inside it, characterized in that, in order to save heat and increase the reliability of heat supply, the ratio of internal diameters of the return and feed pipe is equal. 2. Heat pipe according to claim 1, characterized in that the feed pipe is made of a non-metallic low heat conductive material.  Aa fut.Z