| Owing to the energy crisis and air pollution, making use of solar energy has achieved more and more attention. Solar energy is low heat flux. In order to get high-grade energy to achieve the economic energy usage, the solar light should be gathered. For optimizing of sunlight gather system, in this article the optical and thermal characteristics of dish-type solar gather system is analyzed by Monte Carlo method. Based on a large of simulation calculation, the main factor to impact the optical and thermal characteristics of dish-type solar gather system is attained, and the scheme of the system energy transfer is also optimized. The main work as follow:1. The research of characteristics of the parabolic dish concentrator: Based on a large of simulation calculation, The relations of the heat flux of parabolic dish concentrator with the focal distance of the paraboloid and the opening size of concentrator. And the reflection energy and heat flux of collector under different solar radiation spectrum is also achieved.2. The analysis of the performance of the parabolic dish concentrator performance: Considered the influence of absorptivity, the distribution of heat flux and temperature on the internal surface of different type of cavity absorber is analyzed, so provide a theoretical base for absorber designing and manufacturing3. Study on energy transfer characteristics of the parabolic dish concentrator: For achieving a best scheme, the different energy transfer schemes are optimizing. For the selected scheme, the circumrotated elliptical mirror is analyzed, and the factor impacting on the reflected energy distribution is defined. At the same time, the influence of the installation error is also confirmed. The optical energy losing and heat flux distribution at the exit of the optical transfer pipe is attained by experiment and numerical simulation method.
|
PDF Full Text Request