Parabolic trough type solar thermal collector efficiency dynamic test device and method

Abstract

The invention discloses a parabolic trough type solar thermal collector efficiency dynamic test device and method. A plate type heat exchanger is connected with a circulating oil pump; the circulatingoil pump is connected with the input end of a trough type thermal collector through a vortex shedding flowmeter and a heat conduction oil flow regulating valve; the trough type thermal collector is connected with the plate type heat exchanger through an elevated oil tank; the plate type heat exchanger is connected with a cooling water tank; the output end of the cooling water tank is connected with the plate type heat exchanger through a circulating water pump, a cooling water flow regulating valve and an electromagnetic flowmeter; cooling water enters the plate type heat exchanger, takes away heat and then flows back to the cooling water tank; under a single-axis tracking mode, the trough type thermal collector collects solar radiation energy and converts the solar radiation energy intothermal energy for temperature rise test; and physical quantities acquired by sensors are recorded and uploaded, and the efficiency of the trough type solar thermal collector is calculated. With the dynamic test method of the invention adopted, test conditions can be extended, and a parabolic trough type solar thermal collector efficiency dynamic test can be carried out accurately. The test deviceand method are suitable for testing the efficiency of high-light concentrating trough type solar thermal collectors under complicated and changeable weather.

Description

technical field [0001] The invention relates to a device and method in the field of parabolic trough solar linear concentration field, in particular to a device and method for dynamically testing the efficiency of a parabolic trough solar heat collector. Background technique [0002] According to the development roadmap of solar thermal utilization, the basic goal of China's solar energy application development is: in 2020, 2030 and 2050, solar energy applications will replace fossil energy by more than 150 million, 310 million and 860 million tons of standard coal respectively, of which electricity will be provided 150 billion, 510 billion and 2.1 trillion kWh, respectively. The specific form of the development route of solar thermal utilization: before 2020, the application of solar water heating system will still be the mainstream application method, and about 60% of buildings will install solar water heating system; meanwhile, the application of solar heating and cooling...

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Problems solved by technology

Moreover, unlike laboratory test conditions, field test conditions often lack corresponding adjustments and high-precision control equipment to stabilize the inlet temperature of the trough collector within 2%.

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