Key;
Laboratory;
of;
Enhanced;
Heat;
Transfer;
and;
Energy;
Conservation,;
Ministry;
of;
Education;
and;
Key;
Laboratory;
of;
Heat;
Transfer;
and;
Energy;
Conversion,;
Beijing;
Municipality,;
College;
of;
Environmental;
and;
Energy;
Engineering,;
Beijing;
University;
of;
Technology;
parabolic; trough; receiver; two-dimensional; empirical; model; thermal; performance; of; heat; loss; annular; space; selective; coating; wind; velocity;