Experimental Study On The Resistance Characteristic Of Manifold

In order to make up for the imbalance of water resources problem of uneven, often using "big flow, small temperature difference" works, although this method can automatically eliminate uneven phenomenon, but this is a backward way to input, high energy consumption, low output, which not only cause a waste of heat and result in a waste of electricity. This mode of operation is not energy-saving, it’s not in line with modern requirements for energy for sustainable development, so in order to solve the imbalance of hydraulic, starting from the root, find the causes of hydraulic unbalance, analyze the key for hydraulic maladjustment problems: flow and pressure distribution rule and reason.This is parallel to the water piping system used in the experiment, numerical simulation and theoretical research, supplemented by the method based on the diversity of water flow regulation found that parallel sets of water tubes in the end flow accounted for a large proportion of the entire system. Application Fluent software for water and fluid flow simulation in the parallel pipeline. Inlet velocity were studied separately, head diameter, pitch and branch number of factors impact on the parallel pipeline flow distribution uniformity. Results show that the uniformity of flow distribution with the inlet velocity increases, head pipe diameter decreases, tube spacing of decreased and increased number of tubes and weaken, the reason was pressure imbalance of parallel pipelines and export. Through an analysis of radiant floor heating system hydraulic calculations shows that reach a certain value when the actual flow, regulating the flow of heat and the temperature on the surface of the floor is not obvious; pipe temperature difference between the tube length increases, decreases with increasing inlet velocity.