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System and method for on-line heat loss test of groove type high temperature evacuated collector tubes

A technology of vacuum heat collecting tube and testing system, which is applied in the direction of liquid tightness measurement using liquid/vacuum degree, testing of fluid tightness, testing of machine/structural components, etc., to shorten detection time, small vacuum drift of leak rate, The effect of easy detection

Pending Publication Date: 2017-07-07
GRIMAT ENG INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The national standard 17049-2005 for the inspection of all-glass vacuum heat collector tubes uses electric spark leak detection. Due to the material of high-temperature heat collector tubes, the vacuum degree inside the tube, and the requirements for the consistency and accuracy of heat collector tubes, this method is no longer applicable.

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  • System and method for on-line heat loss test of groove type high temperature evacuated collector tubes
  • System and method for on-line heat loss test of groove type high temperature evacuated collector tubes
  • System and method for on-line heat loss test of groove type high temperature evacuated collector tubes

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Embodiment Construction

[0044] refer to figure 1 As shown, the on-line heat loss testing system of the trough-type high-temperature vacuum heat collecting tube of the present invention mainly includes an air extraction system, a leak detection system, a uniform temperature heating system, a heating control system, a data acquisition system and a host computer control system.

[0045] Described uniform temperature heating system (see figure 1 The dotted frame part in ) is used for heating the measured tube 10, and in this embodiment, the heater is composed of a heating rod and a uniform temperature copper tube.

[0046] The heating control system includes power transmitters, temperature controllers and inspection instruments, circuit breakers with leakage protection, silicon controlled rectifiers, lead wires, etc., which can be set independently in the form of cabinets, and are used to control the uniform temperature heating system. Heating state implementation control, see image 3 As shown, its wo...

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Abstract

The invention provides a system and a method for on-line heat loss test of groove type high temperature evacuated collector tubes, in order to realize on-line heat loss test of the groove type high temperature evacuated collector tubes. The system comprises the following components: a uniform heating system, a heating control system, an air exhausting system and a leak detection system, a data acquisition and host computer control system. The method for on-line heat loss test comprises the following steps: a) a uniform heating system is installed on a test station of a final assembly line of collector tubes and wires are connected, and the heating control system is connected; b) degree of vacuum in evacuated pipeline is maintained by using vacuum pump sets of the air exhausting system and the leak detection system; c) the collector tubes are heated to a target temperature, and heat loss of the collector tubes in the target temperature is tested; d) after the test is finished, heating is stopped, after cooling, connection between the collector tubes and the vacuum leak detection system is cut off, and the uniform heating system is moved out. The system and the method have characteristics of simpleness and easy operation, and the like, and the performance of single collector tube on the production line can be fed back rapidly.

Description

technical field [0001] The invention belongs to the field of on-line detection methods for heat collecting tubes, the core component of solar thermal power generation, and specifically relates to an online heat loss testing system and method for trough-type high-temperature vacuum heat collecting tubes. Background technique [0002] Solar thermal power generation technology occupies an important position in the field of new energy applications, among which the use of trough thermal power generation has been applied in some foreign regions for more than 20 years. The trough thermal power generation technology uses the trough concentrator to gather sunlight, and the heat collecting tube collects the concentrated heat and transfers it to the thermal working medium flowing in the heat collecting tube (according to the use and type of the heat collecting tube, it is divided into heat transfer oil, molten salt and water vapor. etc.), the heated working medium and the low-temperatu...

Claims

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Application Information

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IPC IPC(8): G01N25/20G01M3/28
CPCG01M3/2846G01N25/20
Inventor 王笑静刘晓鹏于庆河
Owner GRIMAT ENG INST CO LTD
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