A mathematical model to calculate the steady-state performance of a loop he
at pipe (LHP) is presented. The mathematical model is based on the steady s
tate energy conservation equations and the pressure drop calculations along
the fluid path in the LHP. The LHP operating temperature is calculated as
a function of the applied power at a given LHP condition. The heat exchange
between each component of the LHP and the surroundings is taken into accou
nt. Both convection and radiation environments are modeled. Experimental va
lidation of the model is attempted by using two different LHP designs. The
validity of the mathematical model is investigated for different sink tempe
ratures and elevations. The comparison of the calculations and experimental
results showed good agreement (within 5%). The proposed method proved to b
e a useful tool for reliable prediction of the steady state performance cha
racteristics of the LHP.