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Heat Exchanger Diagnostic Methods

A technology for heat exchangers and process controllers, which is applied in the field of diagnosis of the degree of dirtiness of heat exchangers, can solve problems such as reduced heat transfer efficiency, and achieve the effect of avoiding maintenance work and preventing damage

Active Publication Date: 2021-08-31
SAMSON AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During long-term use of the heat exchanger, clogging of the heat exchanger channels due to dirt and lime deposits, etc., resulting in an undesired reduction in heat transfer efficiency

Method used

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Examples

Experimental program
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Embodiment Construction

[0044] figure 1 A schematic diagram of a district heating application utilizing a process controller 4 and a controllable regulating valve 6 controlled by the process controller 4 is shown. The regulating valve 6 is connected to the heat exchanger 8 and obtains the initial flow temperature T1 of the user circuit and the return flow temperature T2 of the piping circuit as measurement parameters. Optionally, a pump 10 is connected to the process control drive 2 in the consumer circuit, which provides further control possibilities. The process controller 4 adjusts the regulating valve 6 to the theoretical heat transfer efficiency. The mass flow in the piping circuit required for the theoretical heat transfer efficiency is analyzed as a measure for the degree of fouling of the heat exchanger 8 . exist figure 1 In the example figure, the process control driving mechanism 2 is used in combination with the regulating valve 6 for heating control of the initial flow temperature of t...

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Abstract

The invention relates to a heat exchanger diagnosis method. Among them, the primary side mass flow of the flow medium flowing through the heat exchanger (8, 18) is regulated by the regulating valve (6, 16), which is controlled by the process controller (4, 14), wherein the process controller Valve position values ​​for regulator valves (6,16) provided by (4,14) are obtained and stored. The invention is characterized in that the valve position values ​​for the control valves (6, 16) are recorded during the recording period, so that in at least one measurement sequence the valve position values ​​assigned to a periodic observation period are stored, wherein the observation period reflects the same period of one year, and when the deviation of the stored measured value from the reference value assigned to the measurement sequence is greater than a predetermined deviation from the reference value, by analyzing the at least The position value of a sequence of measurement results is used to diagnose the degree of fouling of the heat exchanger (8,18).

Description

technical field [0001] The invention relates to a method for diagnosing the degree of contamination of a heat exchanger, wherein the primary-side mass flow of the flow medium flowing through the heat exchanger is regulated by means of a regulating valve which is regulated by a process controller, wherein the process controller provides The valve position value for the regulating valve is obtained and stored. Background technique [0002] DE 20 2014 202 478 A1 discloses a method and a device for the diagnosis of a heating installation with at least one heat exchanger, where the time required for the flow medium to heat up at a defined temperature is longer than a defined time and / or when the flow through the heat exchanger A notification is issued and / or stored when the heating of the specified mass flow of the flowing medium remains below a predetermined temperature difference. For this purpose, the temperature difference between the inlet temperature and the return tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M99/00
CPCG01M99/002F24D10/003F24D19/1006F28F27/00F28G15/003Y02E20/14Y02B30/17
Inventor R·施瓦布
Owner SAMSON AG
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