| 摘要 |
FIELD: heating systems. ^ SUBSTANCE: invention refers to heat exchange. Heat exchanger includes vacuum tube with external wall and internal wall and system of tubes for passage of fluid medium, in which there is fluid medium and external wall of which is located coaxially to walls of vacuum tube, at least one heat-conducting element connecting internal wall of vacuum tube to external wall of system of tubes, solar energy collection and concentration device located on wall of vacuum tube which is directed from heat-conducting element. At least one heat-conducting element is made so that it rests on external wall of system of tubes or is attached to the above external wall and pressed with pre-stress to internal wall of vacuum tube; at that, each heat-conducting element has spiral shape in cross section and covers the angle of 450, preferably more than 720. ^ EFFECT: increasing heat exchange with system through which fluid medium flows and eliminating the possibility of undesired ageing induced with oxidising effects, eg as the result of use of materials (namely metal ones) different in individual pipelines or with condensation process. ^ 5 cl, 6 dwg |
