For the same device and circulating thermal coefficient and countercurrent heat transfer coefficient is what relation?
Little effects on downstream flow heat exchange coefficient. It should be said that both close. With the influence of heat transfer coefficient with fluid flow velocity, fluid property (related to import and export temperature), the structure of the equipment. The same device, a heat transfer coefficient of downstream and upstream won't, but the gap is not big. The same device, so the heat exchange area of the same; Upstream downstream, logarithmic mean temperature difference is different Assumes that the heat transfer coefficient is consistent, fluid temperature of import and export have change Inlet temperature and temperature changes, fluid physical properties are changed, the physical properties changed little Fluid physical properties are changed, heat transfer coefficient is also have change So the heat transfer coefficient, but the impact is not big.
Cold winter in the north, and the inner surface of outer wall temperature is lower than the indoor air dew point temperature, the inner surface of the outer wall condensation occurs the metope inside the trigger mold phenomenon. This kind of phenomenon will not only influence people comfortable and healthy, but also cause indoor utensils and damage of building structure.
The same device, a heat transfer coefficient of downstream and upstream won't, but the gap is not big. The same device, so the heat exchange area of the same; Upstream downstream, logarithmic mean temperature difference is different Assumes that the heat transfer coefficient is consistent, fluid temperature of import and export have change Inlet temperature and temperature changes, fluid physical properties are changed, the physical properties changed little Fluid physical properties are changed, heat transfer coefficient is also have change So the heat transfer coefficient, but the impact is not big.
