The receiver

whose heat loss directly affects the conversion of efficiency from optic to thermal

is a key component of the parabolic trough collector.By analyzing the heat loss of 13 m pipeline which is constructed by six two-meter receivers

the results show that the radiant heat loss is 70% to 90% of the total heat loss when oil’s temperature from 105℃ to 313℃.The heat loss measured by quasi-static equilibrium method is larger than that measured by steady-state equilibrium method

and at high temperature（290℃）the former is 1.18 times as high as the latter.The heat loss is 1.2 times bigger than that of SCHOTT’s PTR70.