Measuring device for temperature field of air-cooled condenser of power plant

Abstract

The invention discloses a measuring device for a temperature field of an air-cooled condenser of a power plant, which comprises an air-cooled radiator module and temperature measurement cables, wherein a plurality of the temperature measurement cables are arranged on the surfaces inside and outside a finned tube bundle of the air-cooled radiator module or at the positions, which are 0.1 to 10m away from the finned tube bundle, inside and outside the air-cooled radiator module; each temperature measurement cable is connected with a temperature acquisition device; and the temperature acquisition device is connected with a host computer through a communication cable. The device ensures that temperature values of temperature measurement points are acquired by the temperature acquisition device and are uploaded to the host computer for processing through temperature sensors arranged on the temperature measurement cables, realizes the measurement on the temperatures of various points of a plurality of the air-cooled radiator modules of the power plant, and has accurate measurement, convenient realization, and low measurement cost.

Description

technical field [0001] The invention relates to a temperature measuring device, in particular to a temperature field measuring device of an air-cooled condenser in a power plant, belonging to the technical field of temperature measurement in a power plant. Background technique [0002] Air-cooled condensers in power plants are divided into direct air-cooled and indirect air-cooled systems. At present, the indirect air cooling system generally only measures the inlet water temperature and the cooling triangle or the outlet water temperature of the sector formed by the cooling triangle; the direct air cooling system generally measures the outlet temperature of the steam distribution pipe and the condensate header, the above two This kind of air-cooling system does not directly measure the air temperature. Therefore, there is a certain degree of blindness and lag in the evaluation of the heat transfer effect of the air-cooling system, the heat return situation, the operation ad...

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Problems solved by technology

[0003] In the prior art, the main reasons for not directly measuring the air-side inlet and outlet temperature of the air-cooling system of the power plant are as follows: First, the air-cooled condenser of the power plant is particularly large in scale, and the air-side temperature measurement requires a large number of temperature measuring points; The second is that thermocouples and thermal resistance measurement technologies are widely used in the current industry. Each temperature measurement point must have an independent primary temperature sensing element, compensation wire, transmitter, and collector; therefore, the cost of temperature measurement is relatively high; the third is Each measuring point requires an independent transmission line to the acquisition system, resulting in increased wiring costs and reduced reliability; Fourth, independent temperature measuring points make it difficult to install and fix on the air side of the air cooling system, and the installation cost is high

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