抄録
Thermo-compression system (Fig. 3) is, of course, much more economical than single or multiple effect (Fig. 1 and 2) according to the theory of thermo-dynamics. But when evaporation take place at low temperature, high vacuum, or large temperature difference, it is very difficult to use the thermo-compression system practically. In this case when using medium by indirect thermo-compression system (Fig. 4), we can easily accomplish the purpose under these bad conditions.
For example, using trichloroethylene (C2HCl3) or dichloromethane (CH2Cl2) as medium, the pressure at compressor comes near the atmosphere (Fig. 5), the head and suction volume become very small (Fig 6 and 7), and the compressor is simlified, so that we can use this method practically. Fig. 8, 9 and 10 are examples of this system.
