Numerical study of start-up performance of solar cavity receiver

A calculation model has been built for calculating the solar power required at the aperture of solar cavity receiver. According to a given temperature rising rate of the receiver during the start-up period, the net energy that the solar cavity receiver needs is calculated. Based on the net energy, combined with the cavity geometry and wind condition, the variation curve of the solar power required at the aperture during the start-up is figured out. The curves of efficiency and heat loss of the solar cavity receiver are also obtained. The study is helpful to the efficient and safe start-up of solar cavity receiver.