Solar air heat absorber measurement and control system and performance and temperature prediction and protection method
A measurement and control system, air temperature technology, applied in solar thermal power generation, solar thermal devices, thermal conductivity of materials, etc., can solve the problems of poor air flow stability, poor reliability and durability, and unmeasured performance.
Inactive Publication Date: 2012-09-26
HOHAI UNIV
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] Technical problem: There is no measurement standard for the performance of solar tower-type high-temperature ceramic air heat absorbers, and the heat-absorbing material of solar tower-type high-temperature air heat absorbers made of silicon carbide is unstable due to the instability of solar energy concentration energy flux density. Thermal stress damage, poor air flow stability, and thus poor reliability and durability of the system under large capacity
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The working process of tower solar high temperature air silicon carbide ceramic heat sink is as follows: figure 1As shown, the heat-absorbing surface of the silicon carbide ceramic heat absorber receives the sun’s radiant energy, and transfers to the inside through the form of heat conduction in the solid skeleton, and when the air passes through the porous medium, it undergoes forced convection heat exchange with the porous medium, and the air is absorbed Heating, the temperature rises, and at the same time reduces the temperature of the solid skeleton of the porous medium, which protects the safety of the heat absorber. The resistance of the heat absorber is detected by the pressure sensors installed before and after the heat absorber; the efficiency of the heat absorber is calculated by measuring the direct solar radiation intensity, the efficiency of the heliostat and the air dissipation coefficient under quasi-steady state conditions. The input radiation energy of ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a solar air heat absorber measurement and control system and a performance and temperature prediction and protection method. The system comprises a frequency modulation motor, a thermocouple, a pressure sensor, a direct solar radiation and wind speed meter, an air temperature sensor, an analog input module, an analog output module, a remote interface module, a remote communication interface module, an industrial personal computer and a warner. The efficiency is obtained by measuring the input radiation and effective absorption of the sun and dividing the effective absorbed heat by the total input radiation energy; the pressure sensor is used to measure resistance; volumetric heat transfer coefficient is obtained by measuring the solid matrix temperature of the front and back surfaces of the heat absorber and the air temperatures before or after air passes through the heat absorber and performing iterative computation through the computational heat transfer method. The heat absorber is protected by setting limit values of the surface temperature and temperature gradient of the heat absorber and the temperature gradient in the air stream direction.
Description
technical field [0001] The invention is directed to a high-temperature air heat absorber for solar tower thermal power generation. The heat absorber absorbs the radiant energy projected by the mirror field through a porous medium and heats the air to a high temperature. Heater measurement and control system, performance test, temperature dynamic prediction and protection method, the invention belongs to the field of solar energy utilization, thermal energy power and automatic control. Background technique [0002] Effective use of solar energy resources will help alleviate my country's energy problems and reduce CO 2 It will be of great and far-reaching significance to reduce emissions, protect the ecological environment, and ensure the continuous and stable supply of energy in the process of economic development. At present, solar power generation mainly includes photovoltaic power generation and photothermal power generation. [0003] In solar thermal power generation te...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F24J2/40G01M99/00G01N25/18
CPCY02E10/40
Inventor 许昌刘德有郑源郭苏白凤武王志峰
Owner HOHAI UNIV