Comparison of h for water between TMMHP and SMMHP
In Figure 17 and 18, h values of water at both SMMHP [6] and
TMMHP for different inclinations can be compared. The h values at
TMMHP are very high and sinusoidal throughout the heat input range while
the h at SMMHP begins with very low values and grows too slow
with the increasing heat input. In addition, the highest h value
is recorded at 90o for SMMHP and at
45o for TMMHP. However, the trajectories at both SMMHP
and TMMHP clearly indicate the limit of h with the increasing
heat input. Since all the operating and test parameters remain the same
at both single and two-metal micro heat pipe, the variability of heat
conductivity as well as their designed orientation in TMMHP are
considered to be the only initiators for greater h values.
[CHART] [CHART]
Figure 17. Convec. HT coeff. of water in SMMHP[6) at dif.
inclns. Figure 18. Convec. HT coeff.of water at TMMHP at dif.
inclns.