Groove type heat collection field oil injection adjusting system and oil temperature adjusting method

Abstract

The invention discloses a groove type heat collection field oil injection adjusting system and an oil temperature adjusting method. The system comprises an oil tank, an oil pump, a flow regulating valve, an oil sprayer and corresponding pipelines, the heat-conducting oil sequentially flows through all the heat collectors in the branches, and the heat-conducting oil of the multiple branches is heated by all the heat collectors on the branches and then is collected at a pipeline at the tail end to flow out of the heat collection field; the pipeline at the outlet of the oil pump is connected with the flow regulating valve through an independent pipeline; the flow regulating valve is connected with the oil sprayer through a pipeline; the oil sprayers are installed at the middle tail ends of the branches or the connecting position between the two heat collectors in the middle, and each branch is provided with one oil sprayer. On the basis of an existing branch flow and heat collector defocusing adjustment mode, an oil injection adjustment means is added, so that the temperature adjustment of heat conduction oil at an outlet of the heat collection field is more flexible and more effective, oil quality deterioration caused by local overheating is avoided, energy loss caused by heat collector defocusing adjustment is greatly reduced, the heat efficiency of the groove type heat collection field is improved, and the service life of the groove type heat collection field is prolonged. The solar energy utilization rate is increased and carbon emission is reduced.

Description

technical field [0001] The invention belongs to the field of trough-type solar energy concentrating heat collection, and in particular relates to a trough-type heat-collecting field oil injection regulating system and an oil temperature regulating method. Background technique [0002] The trough solar heat collection field uses a parabolic trough concentrator to concentrate sunlight on its own focal line, and installs a vacuum heat absorbing tube on the focal line to absorb solar energy and heat the heat transfer medium; follow-up The power cycle of steam can be used to generate electricity or be applied to other fields of solar heat utilization. The working medium of the trough solar heat collection field is generally heat transfer oil, and the temperature adjustment of the heat transfer oil in the heat collection field is a key adjustment task in the operation of the heat collection field. [0003] At present, the adjustment method of the heat transfer oil temperature at ...

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Problems solved by technology

Due to differences in equipment manufacturing and installation, the flow resistance of each branch is different; the parallel structure of multiple branches in the heat collector field affects each other, resulting in severe coupling of flow regulation, and it is difficult to balance the flow of each branch, resulting in heat transfer oil outlet It is difficult to adjust the temperature, and local over-temperature occurs in some branches, which makes the oil quality deteriorate rapidly and even causes equipment damage; moreover, when the oil temperature at the outlet of each branch is inconsistent, in order to ensure the safety of the higher temperature branch, the outlet of some branch The oil temperature is low, and the total oil temperature of the collector field is low; at the same time, at the peak of solar energy, the excess solar energy causes the oil temperature of the collector field to be too high, so defocusing adjustment has to be adopted, and part of the solar energy is lost, so it cannot be fully utilized

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