Experimental Study of the Thermal Performance of Solar Cavity Receiver During Start-Up Process
Solar cavity receiver plays a dominant role in the light-heat conversion process of the solar power system. Its performance can directly affect the efficiency of the whole power generation system. The start-up thermal performance of a solar cavity receiver with boiling tubes and superheated tubes was experimentally studied. A six-side prism with inclined top and bottom was chosen as the solar cavity receiver. The inside wall heat flux of the receiver was evaluated and according to this condition the layout of boiling tubes and superheated tubes was considered. An experiment platform was designed for the thermal performance test of the receiver. The working substance is water and the electric heating was employed for simulating the solar heating. And the experiment platform can work a pressure range of 0-5.0MPa and a mass flow range of 0-100kg/h. During start-up the temperature rising rate is considered as a main control condition. A couple of reasonable rising curves of temperature were set according to different working pressures, and the mass flow was considered to rise linearly till to the target states. The start-up thermal efficiencies of the receiver under different working pressures were finally obtained with the result that the receiver performed relatively low thermal efficiencies of 55-70％ in target states. A thermal loss evaluation was calculated. And the results show the thermal loss takes a large part of the total energy and the main reason of low thermal efficiencies is the low mass flow. The rising curves of superheated steam temperature, system pressure and heating power were also obtained. The temperature distribution and deformation of the tubes inside the receiver were measured as well. The results show the deformation of the tubes is linear with the temperature of the tubes.
solar cavity receiver thermal performance start-up thermal efficiency deformation
Jinjia Wei Jiabin Fang Liejin Guo Ximin Zhang Yueshe Wang
State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, ＃28 Xianning West Road, Xi’an 710049, China
国际会议
4th International Symposium on Heat Transfer and Energy Conservation(第四届传热与节能国际研讨会 ISHTEC2012)
广州
英文
1-5
2012-01-06（万方平台首次上网日期，不代表论文的发表时间）