Solar thermal collector thermal performance parameter and circular flow measuring device and method

Abstract

The invention belongs to the technical field of solar thermal collection and discloses a solar thermal collector thermal performance parameter and circular flow measuring device and method. According to the arrangement, a complicated and expensive flow sensor is not required, and the measuring device is composed of a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor, an irradiatometer and a data recording and processing module. The measuring method includes performing field measurement to obtain a flow temperature in a vacuum tube, collector inlet and outlet temperatures, environment temperature, irradiation of the collector plane and data collecting time, and calculating thermal loss coefficient, effective thermal gain coefficient and circulation flow of the glass vacuum tube solar thermal collector. The solar thermal collector thermal performance parameter and circular flow measuring device and method has the advantages that measuring process is simple and convenient, field measurement is realized, and high practicability and university is achieved.

Description

technical field [0001] The invention belongs to the technical field of solar heat collection, and in particular relates to a device and method for measuring thermal performance parameters and circulation flow of an all-glass vacuum tube solar heat collector. Background technique [0002] The thermal performance parameters of the all-glass vacuum tube solar collector mainly include the heat loss coefficient and the effective heat gain coefficient. There are limitations in measuring the thermal performance parameters by using the test bench experiment, and the limitation is mainly reflected in the high price; The thermal performance test of the device is completed; it cannot reflect the real working conditions of the actual site. If it is necessary to evaluate the performance of solar collectors in a certain engineering-scale application, considering its practicability and economy, it is not possible to rely solely on laboratory measurement data. [0003] For actual projects,...

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Problems solved by technology

[0003] For actual projects, adding a flow sensor needs to be integrated with the system pipeline, which will increase the cost of the system; in addition, due to poor environmental conditions on the project site, the flow sensor is easily damaged due to blockage, resulting in inaccurate measurement data; therefore , the method of adding a flow sensor to measure the heat loss coefficient, effective heat gain coefficient and circulation flow rate of the all-glass vacuum tube solar collector has great defects

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