Dynamic measurement device and measurement method of thermal efficiency of paraboloid groove-type solar thermal collector
A technology of trough solar energy and trough collectors, which is applied in the field of dynamic measurement devices for thermal efficiency of parabolic trough solar collectors, can solve problems such as lack of adjustment, and achieve low cost and clear physical meaning
Active Publication Date: 2017-05-31
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Problems solved by technology
However, under on-site operating conditions, the trough collector that completes the heat collection process by tracking sunlight on a single axis cannot meet this requirement at all.
Moreover, unlike laboratory measurement conditions, on-site measurement conditions often lack corresponding adjustment and control equipment to stabilize the inlet temperature of the trough collector within 2%.
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[0048] Such as figure 1 As shown, the thermal efficiency dynamic measurement device of the parabolic trough solar collector of the present invention is mainly composed of a heat transfer oil circulation part, a cooling circulation part, a nitrogen sealing part and a measuring instrument part. The heat transfer oil circulation part is connected with the water side inlet and outlet of the water heat exchanger 1 and the cooling cycle part through its heat transfer oil, and the heat transfer oil circulation part is connected with the heat transfer oil of the nitrogen sealing part through its heat transfer oil and the top of the water heat exchanger 1 The bottom of the thermal expansion tank 13 is connected by pipelines, and each instrument in the measuring instrument part is installed on or near the heat transfer oil circulation part.
[0049] The heat transfer oil circulation part includes heat transfer oil and water heat exchanger 1, filter 2, heat transfer oil circulation pump ...
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The invention provides a dynamic measurement device and a measurement method of thermal efficiency of a paraboloid groove-type solar thermal collector. A heat conducting oil circulation part is connected with a water side inlet of a water heat exchanger (1) and a cooling circulation part through heat conducting oil. The heat conducting oil circulation part is connected with the top of the water heat exchanger through the heat conducting oil and the bottom of a heat conducting oil thermal expansion pot (13) of a nitrogen sealing part through a pipeline. A measurement device part is installed on the heat conducting oil circulation part or in a near position. According to the invention, the temperature rise process of a heat transferring fluid outlet under a light condensation working condition is tracked based on a groove-type thermal collector, heat transferring fluid inlet temperature, heat transferring fluid outlet temperature, size flows of heat transferring fluid, solar normal perpendicular incidence irradiancy, environmental air temperature and environmental air speed are measured, and according to these physical quantity and the solar incident angle, the heat efficiency of the groove-type thermal collector is calculated.
Description
technical field [0001] The invention relates to a dynamic measuring device and a measuring method for the thermal efficiency of a parabolic trough solar heat collector. Background technique [0002] The parabolic trough solar collector gathers the direct solar radiation to form a focal line through the parabolic trough concentrator that performs one-dimensional rotating motion, and the concentrated sunlight heats the heat-absorbing tube located at the focal line, and then transfers the heat to The heat transfer fluid flowing through the heat absorbing tube realizes the conversion of solar energy into heat energy. It is widely used in technical fields such as industrial process heat, solar desalination of sea water, solar air conditioning, solar thermochemistry, solar hydrogen production and solar thermal power generation. Thermal efficiency is a key technical evaluation index for the application of parabolic trough solar collectors, and it is the basis for calculation of ec...
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Login to View More IPC IPC(8): G01M99/00
CPCG01M99/002
Inventor 徐立王志峰张强强孙飞虎赵东明原郭丰李钧
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI