| 摘要 |
A b s t r a c t The invention concerns a heat exchange element for condensers contacted with cooling gas, preferably air, with at least two pipes, situated one after another in the cooling gas current and flowed through parallel by the operation means, which have a preferably circular cross section and are provided with crossribs for enlargement of the heat exchange surface. In order to attain, over a large output area of the condenser, only slight pressure differences between the outlet-sided ends of the pipes located consecutively in the cooling gas stream, the ratio of the outer heat transfer surfaces, formed by the surfaces of the crossribs (4) and the pipe (1), to the diameter of the pipe (1) first contacted with the cooling gas is, on the one hand, chosen smaller in relation to the ratio of the outer heat transfer surface (5, 2) to the diameter of the pipe (2) each of subsequently contacted with the cooling gas and, on the other hand, the flow cross section of this pipe (2) subsequently contacted with the cooling gas is chosen smaller in relation to the flow cross section of the pipe (1) always previously contacted with the cooling gas. Preferably, at least two pipes (1, 2), formed with circular yet different-sized flow cross sections, are ribbed with crossribs (4, 5) of equal outer dimensions and equal division. |
