Definition of condensation two phase flow behaviors for spacecraft design

This paper presents an analysis of the condensation heat transfer data from 1‐G and zero‐G testing of a two‐phase flow experiment employing R‐12 (dichlorodifluoromethane) as the working fluid. The data is compared with condensation models. Condensation heat transfer coefficients from the working fluid to the inner wall of the condenser tube, calculated from the data by using an energy balance across the condenser cooling water, are presented for both zero‐ and 1‐G conditions. The measured zero‐G heat transfer is compared with Pohner’s film model and Best’s heat transfer coefficient. A comparison is made between the zero‐G and 1‐G heat transfer, and a discussion of the results follows.