There are small temperature and pressure difference in steam inlet and outlet of heat exchanger, and big heat transfer surface.

换热器蒸汽入口和出口温差小，压差小，管程传热面积大。

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Slagging and fouling on heat transfer surface is a familiar and unavoidable problem of power boiler, which is adverse to keep boiler running safely and economically.

受热面污染作为燃煤电站锅炉运行中一个不可避免的实际问题，对锅炉的安全经济运行带来严重影响。

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A preparation method of a vapor dropwise condensation heat transfer surface comprises: pre-processing, self-assembling, loading ion liquid cation and post-processing.

一种蒸汽滴状冷凝换热表面的制备方法，包括：预处理、自组装、加载离子液体阳离子、后处理等步骤。

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Transfer to a firm surface and cut into slices with a pizza cutter.

CNN: Pizza Dough

The degree of stripping depended on a range of factors, including the volatility of the chemical, the temperature of the water and the surface area available for transfer.

ECONOMIST: Indoor pollution

Instead, it will look like any silicon chip as found in computers but "with an open window on the surface that will allow chemicals to transfer in and to be sensed by the system, " explained Dr Pearce.

BBC: Scientists develop 'nose-on-a-chip'