| 摘要 |
<p>PCT No. PCT/SE88/00161 Sec. 371 Date Sep. 19, 1989 Sec. 102(e) Date Sep. 19, 1989 PCT Filed Mar. 30, 1988 PCT Pub. No. WO88/07608 PCT Pub. Date Oct. 6, 1988.A heat exchanging or circulation apparatus comprising a system of conduits connected to an inlet and an outlet for circulating water or other practically incompressible liquid through the system, heat being transferred through the conduit walls, circulation through the apparatus being periodically shut-off, whereupon continued heat transfer through the conduit walls causes freezing of the liquid to ice in the conduits. Two first portions of the system are relatively heat insulated or shielded from flowing cold air to obtain delayed freezing of the water in these portions in relation to the freezing of the liquid to ice in uninsulated second portions of the system located between the first two portions so that ice growing in the second portions towards the ends thereof will be in communication with the two first portions will result in an increased pressure on the unfrozen liquid in the insulated portions of the system, the increased water pressure being relieved by the two first portions each connected through insulated branch conduits with a closed insulated pressure relief or absorbing means so as to avoid rupture of the conduits in any portion of the system.</p> |
