title: [Mass optimization of thermal network model of coupled dual-loop thermal control system in spacecraft].
abstract: OBJECTIVE
  To deal with the mass optimization of thermal control system as well as environmental control and life support system (ECLSS) of manned spacecraft.
  
  
  METHODS
  The thermo-hydraulic network composed of coupled liquid dual-loop and gas loops was studied. Physical and mathematical models were established and used for flow, heat transfer and mass calculation in the network. The influences of various operational and structural parameters on the mass were analyzed.
  
  
  RESULTS
  There were optimal pipe diameters for internal loop and external loop; there existed an upper limit of flow rate in the internal loop and lower limit in the external loop; there were also optimal flow rates in the loops and optimal exit temperature of the radiator.
  
  
  CONCLUSIONS
  Reasonable design of these parameters were very important for reducing the system mass.
authors.affiliation: Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China.
authors.forename: X R
authors.initials: XR
authors.lastname: Zhang
authors.forename: J X
authors.initials: JX
authors.lastname: Ren
authors.forename: X H
authors.initials: XH
authors.lastname: Xu
authors.forename: X G
authors.initials: XG
authors.lastname: Liang
mesh_terms: D000389:Air Conditioning / Q000295:instrumentation / Q000379:methods*; D004780:Environment, Controlled; D004867:Equipment Design; D006358:Hot Temperature; D006801:Humans; D008021:Life Support Systems / Q000295:instrumentation*; D008433:Mathematics; D008962:Models, Theoretical; D013026:Space Flight / Q000295:instrumentation*; D018531:Spacecraft / Q000295:instrumentation