Household solar water heating system thermal performance test platform

Abstract

The invention belongs to the field of detection of the thermal performance of a solar water heater, and specifically relates to a household solar water heating system thermal performance test platform. The test platform comprises a rotatable pedestal and a control assembly which controls the rotatable pedestal to rotate at a specified speed, the rotatable pedestal is provided with a placing platform used for the placement of a solar water heater to be tested, the surface of a heat-collection plate of the solar water heater to be tested is arranged on the placing platform in an inclined manner, the rotatable pedestal is also provided with a planar mirror, the surface of the heat-collection plate of the solar water heater to be tested on the placing platform is arranged on the sunlight reflecting path of the planar mirror, and the test platform also comprises a data acquisition and processing assembly. According to the invention, a perfect basic hardware platform is provided for the detection of the system performance of a current household solar water heater, difficulty brought by traditional natural light tests is overcome, the test platform can adapt to the outdoor environment well, the test platform is suitable for testing a wide irradiation scope, and the testing efficiency is very high.

Description

technical field [0001] The invention belongs to the field of thermal performance detection of solar water heaters, and in particular relates to a thermal performance test platform of a household solar water heating system capable of one-dimensional tracking and adjustable plane reflection. Background technique [0002] The domestic solar water heating system can reduce the energy consumption of hot water by more than 70%, and the energy saving effect is very obvious, so it has become the first choice of thousands of households. Data from the "2012 China Solar Thermal Utilization Industry Report" shows that as of 2012, the amount of solar energy has reached 257.7 million square meters, compared with less than 2 million square meters in 1992, an increase of nearly 130 times in 20 years. Manufacturers increased from less than 50 to about 2,800, an increase of 56 times. In terms of market share, solar water heaters also account for half of the three major water heaters. With t...

AI Technical Summary

Problems solved by technology

However, its defects cannot be underestimated: first, it is difficult to guarantee the uniformity of irradiation, and the unevenness of irradiation even exceeds 15% under long-term use

Secondly, the light tube is constructed to imitate the sunlight environment, which is not natural light after all; spectral research has found that the proportion of infrared light in the actual spectrum of the solar simulator far exceeds that of natural light, and the spectral matching error between the two is relatively high

Again, if you want to imitate the sunlight environment for a long time, the lamp often needs to work for a long time. At this time, the defects of short life and huge power consumption become more and more prominent, and the operation and maintenance costs are extremely high.

Finally, the solar simulator is in an indoor environment after all, and its simulation is the direct sunlight irradiation under ideal conditions; while in the real outdoor environment, the sky irradiation and air turbulence are complex and complicated, and cannot be restored by ideal means at all.

All of these have a great impact on the accuracy of the actual test results.

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