Heat exchanger

A technology of heat exchanger and heat exchange, applied in heat exchange equipment, heat transfer modification, lighting and heating equipment, etc., can solve the problem of large area of ​​heat exchanger, achieve high heat conduction, improve efficiency, and increase contact surface Effect

CN103959006AInactive Publication Date: 2014-07-30WICKEDER WESTFALENSTAHL
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2014-07-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a heat exchanger for exchanging heat between a first material or material flow and a second material or material flow, comprising at least one wall that separates the materials or material flows, wherein the surface of the wall has an arithmetic mean roughness Ra of 2 to 20 [mu]m, preferably 10 [mu]m, or a roughness depth Rz of 10 to 50 [mu]m, preferably 30 [mu]m.
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Description

technical field

[0001] The invention relates to a heat exchanger according to the preamble of claim 1 . Background technique

[0002] In power plant installations, for example, both DACC (Direct Air Cooled Condenser) cooling systems and indirect cooling systems are used. The cooling system ultimately involves heat exchangers (also known as heat transfer or heat exchangers) which transfer thermal energy from one material or material flow to another material or material flow. A separating, but heat-conducting wall is usually present between these materials or material flows. In power plant operation, the one material flow is preferably water vapour. The further material flow can be air, in particular ambient air, for example.

[0003] The background of applying the air-cooled heat exchanger is that this system has the effect of protecting the environment and saving water. Only one cooling circuit is present as standard. The heat is discharged directly into the circulating...

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Embodiment Construction

[0029] The heat exchanger of the invention comprises at least one wall separating the material or material flow. In this context, the heat exchanger according to the invention is preferably a heat exchanger for indirect heat transfer, which is characterized in that the material flow is spatially separated by a heat-conducting wall. Such heat exchangers are also referred to as heat recuperators (Rekuperator). The structural form of the heat exchanger (Regenerator) can also be considered.

[0030] According to the invention it is provided that the surface of the partition wall at least locally has an arithmetic mean roughness value Ra of 2 to 20 μm, preferably 10 μm, and / or a roughness height Rz of 10 to 50 μm, preferably 30 μm.

[0031] The commonly used abbreviation Ra represents the arithmetic mean roughness value and implements the standard DIN EN ISO4287:1998. The average roughness value is the arithmetic mean of multiple magnitudes of the roughness profile and describes ...