| Since there are many advantages for the horizontal-tube falling film evaporation technologies, such as lower temperature lost, higher heat-transfer coefficient, more excellent performance at low temperature. This technology has been applied in various fields as desalinization of sea-water, electricity generation by temperature interval of ocean, cooling engineer and chemical engineering and so on. Liquid distribution and evaporation heat-transfer performance were studied in this paper by theoretical analysis and experimental research.In this literary the calandria liquid distribution equipment were used and designed various porous tubes distributor and start experiment. In consideration of heat-exchange tube general distribution effect, at each tube bottom diversion device were set up, which is simple and has a good cloth liquid effect. Investigated to spray quantity as the influence of the orifice flow coefficient in the single pore tube experiment; Investigated to spray quantity as the influence of the inside-tube pressure, out-flow quantity and distributive unwell-distributed coefficient in the porous tubes experiment; Investigated to spray density as the influence of mode conversion of inter tube falling-film modes in the falling-film modes experiment.The flow formulas and revised momentum equation were given from the analysis of flow performance in porous tubes manifolds, the design proposal and the statistic concept of calculating the distributive unwell-distributed coefficient was put forward, a new experimental device was constructed to test the performance of the distributor.The numerical simulation was used by Laminar model and standard k-εmodel of FLUENT6.3 in the paper, which set up numerical model for inter tube falling-film modes of equal diameter porous tubes and carried on the numerical simulation. |
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