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A boiling tube is a small cylindrical vessel used to strongly heat substances in the flame of a Bunsen burner. A boiling tube is essentially a scaled-up test tube, being about 50% larger. They are designed to be wide enough to allow substances to boil violently as opposed to a test tube, which is too narrow; a boiling liquid can explode out of the end of test tubes when they are heated, as there is no room for bubbles of gas to escape independently of the surrounding liquid. This phenomenon is called Bumping.
A design method of a shell-side boiling tube-side condensing coiled tube heat exchanger
The application discloses a design method of a shell-boiling tube-condensing wound tube heat exchanger, according to the inlet and outlet temperatures of the tube and the shell, the dew point and bubble point of the working medium of the tube and the shell, the whole heat exchanger is divided into three parts, i.e. a tube-condensing shell-liquid section, a tube-condensing shell-boiling section and a tube-condensing shell-gas section, and the heat exchange capacity, the surface heat exchange coefficient of the tube and the shell, the comprehensive heat exchange coefficient, the pressure drop of the tube and the shell, the heat exchange area and the axial effective heat exchange length of the three parts of the wound tube heat exchanger are respectively designed and calculated; the tube is always in a gas-liquid mixed phase state of condensation phase change, the surface heat exchange coefficients of the tube and the shell are related to the dryness, therefore, the three parts of the wound tube heat exchanger are designed and calculated by using the finite volume method. The design method of the shell-boiling tube-condensing wound tube heat exchanger has the characteristics of high calculation precision, complete design method and high calculation efficiency, and has high commercial value and market promotion value.
Owner:ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY