Experimental investigation of water vapor-bubble pump characteristics and its mathematical model reconstruction

الملخص EN

In this research, an experimental test has been conducted to study the pumping characteristics of a vapor-bubble pump based on water properties.

It also includes a trial based on the obtained experiment al data to correct and reconstruct the previ ously developed theoretical mathematical model of this bubble pump.

The mathemati c al model t hat was developed for general fluid pr operties can be used after modification to represent the actual behavior of t he water vapor-bubble pump.

Most of the bubbl e pump confi guration paramet ers which may affect its performance are experimentally investigated.

Three different inner tube diameters (8, 10, 12 mm) with five submergence ratios (0.2, 0.3, 0.4, 0.5, and 0.6) are tested.

The results showed that the bubble pump capacit y increases with the thermal energy processed and continue to increase up to a maximum value then begi n to dec line.

Each t ube diameter has its own maxi mum discharge; the bigger tube diameter gives higher maximum discharge which is in turn increases with the increasing ofsubmergence ratio.

The experimental results of the pumping capacit y are compared with those obtained from the mathematical model .Then the mathemati c al model is reconstructed by adding a correcting fac t or (K).

This factor is necessar y to account for t he disc r e pancies that observed between the experimental and t he theore tical results.

The margin of e rror between the results of the resulting corrected mat hematical model and the r e sults of the practical test was acce ptable and it can use this new model to anal yze the performance of the bubble pump.