A temperature-controlled trough solar collector system

Abstract

The invention provides a temperature-controlled trough solar heat collection system, comprising a heat collector, the heat collector includes a heat collection tube and a reflector, the heat collection tube absorbs solar energy, and heats the water in the heat collection tube, and the heat collection tube is A plurality of pipes are connected in parallel, and the lower part of each collector tube corresponds to a reflector. It is characterized in that a temperature sensor is arranged at the outlet of each collector tube to measure the fluid temperature at the outlet of the collector tube. The control system is connected with the temperature sensor data, according to the temperature sensor The detected data judges the heating condition of each collector tube. The present invention can find out the heat collecting tube with low outlet temperature through the above-mentioned control system, check this, find out the cause of the problem, and facilitate improvement. The control system can also automatically remind that the outlet temperature of the collector tube is lower than the normal value.

Description

technical field [0001] The invention belongs to the field of solar energy, in particular to a solar heat collector. Background technique [0002] With the rapid development of modern society and economy, the human demand for energy is increasing. However, the reserves of traditional energy such as coal, oil, and natural gas continue to decrease and become increasingly scarce, resulting in rising prices. At the same time, the environmental pollution caused by conventional fossil fuels is also becoming more and more serious. These greatly limit the development of society and the improvement of human life quality. . Solar thermal conversion is a solar energy utilization method with high energy conversion efficiency and utilization rate and low cost, which can be widely promoted in the whole society. In solar heat utilization devices, the key is to convert solar radiation energy into heat energy, and the device that realizes this conversion is called a solar collector. [000...

AI Technical Summary

Problems solved by technology

[0003] In solar collectors, the heat collecting tube structure is a very common form. This structure generally includes multiple parallel and side-by-side heat collecting tubes, but in operation, the fluid distribution in different heat collecting tubes often occurs unevenly. At the same time, there is also the fact that the temperature of the fluid in different heat collecting tubes is different due to uneven heating, which leads to different pressures in different heat collecting tubes

Long-term operation in this case will cause damage to the heat collecting tube with high pressure, which will cause the overall heat collector to be unable to operate effectively

[0004] In addition, during the heat exchange, the heat collecting tube absorbs solar energy to form a steam-water mixture. The existence of the vapor-liquid mixture causes the gas to mix together, and the heat exchange capacity between the liquid and the liquid decreases, which greatly affects the heat exchange efficiency.

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