Dynamic dip testing as a method to assess the condensate drainage behavior from the air-side surface of compact heat exchangers

Water retention can alternatively be computed without experimental data from static mechanical or dynamic mechanical models.

“Alternatively, the water retention can be computed without experimental data from static mechanical [37] or dynamic mechanical [38] models with the developments of [39-41].”

The model from Zhong et al. [37] diverges from the experimental results as the simulation continues, eventually reaching M_film,r ≈ 0 at t_drain = 230s.

“However, the model diverges from the experimental results as the simulation continues, eventually reaching 𝑀 f ilm , r ≈ 0 at 𝑡 drain = 230s.”

The mass of water retained on the heat exchanger was different for dynamic dip testing and wind tunnel testing.

“However, the mass of water retained on the heat exchanger was different for both test methods.”

Both dynamic dip testing and wind tunnel testing yield the same condensate retention characteristics for different test samples.

“Both test methods yield the same condensate retention characteristics for different test samples.”

Dynamic dip testing could be used as a useful method to evaluate the condensate drainage characteristics of heat exchangers.

“Zhang et al. [76] claimed that dynamic dip testing could be used as a useful method to evaluate the condensate drainage characteristics of the heat exchangers.”

The difference in water retention could be a combined effect of the different fin geometry and the different construction of coil at the bottom.

“The difference in water retention could be a combined effect of the different fin geometry (see McLaughlin and Webb [22]) and the different construction of coil at the bottom (see Zhong et al. [23]).”

Dynamic dip testing provides highly repeatable data for real-time drainage of compact heat exchangers.

“The new method provides highly repeatable data for real-time drainage.”