THERMAL TUBE FOR SPACECRAFT Russian patent published in 1998 - IPC

FIELD: heat engineering; thermostating objects on board of spacecraft. SUBSTANCE: thermal tube is made with boundary of condensation zone located at distance from end surface no less than magnitude found from the following formula: , where 1 is distance from end surface of tube to beginning of condensation zone; n is number of longitudinal grooves; L_th.t is length of thermal tube; S_max is area of cross section of one groove when sizes of grooves are increased within tolerance; S_min is area of cross section of one groove when sizes of grooves are decreased within tolerance; d_s,min is minimum diameter of steam passage. Excessive heat-transfer agent due to technological spreads in sizes of longitudinal grooves is beyond condensation zone of thermal tube. EFFECT: enhanced efficiency. 2 dwg