Thermal energy storage characteristics of sand as filler material for solar thermocline tank
YANG Yongping, HAN Jingxiao, LI Peiwen, HOU Hongjuan, XU Ben
CIESC Journal . 2014, (11): 4285 -4292 .  DOI: 10.3969/j.issn.0438-1157.2014.11.010