Performance enhancement of centrifugal pump by minimizing casing losses using coating

Abstract

Present study focuses on the experimental and numerical investigation of the effect of surface roughness of casing and adhesive coating on the efficiency of centrifugal pump. It consists of two parts; in the first part, effect of coating centrifugal pump casing by ultra-smooth ceramic based coating on the efficiency of the centrifugal pump is investigated experimentally. In the second part, effect of change in surface roughness of casing is investigated numerically by using the CFD tool. The surface roughness of casing is modeled in terms of effective sand grain size parameters and investigated by solving Reynolds-averaged Navier-Stokes equation at volume mesh. Effects of three surface roughnesses, i.e., 100 μm, 200 μm and 300 μm, are investigated numerically. It is observed that surface roughness of casing has considerable effect on pump performance, and pump head decreases by 9.06-14.73% by change in surface roughness from 100 to 300 μm for different mass flow rates values. For same flow rate, centrifugal pump with coated casing produces more head than that of pump without coating. Coating casing with the ultra-smooth adhesive material results in maximum efficiency enhancement of 9.6%.

Optimization of the critical overlap length of hudraulic distributors regarding cavitation inception

“…The results show that the performance of the runner was very sensitive to changes of the exit tip angle, and the optimization study is very encouraging from the perspectives of micro hydro application. Also, in a study on the experimental and numerical investigation of the effect of surface roughness of casing and adhesive coating on the efficiency of centrifugal pump, [9] shows that, for different mass flow rates values, the surface roughness of the casing has a considerable effect on pump performance. In the same vein, [10] proposes a novel multi-objective evolution algorithm for the design of tidal turbine blade airfoil, to overcome the adverse effects of cavitation and roughness.…”

Influence of Post-Heat Treatment on the Characteristics of FeCrBMnSi Coating on Stainless Steel 304 Substrate Prepared by Twin Wire Arc Spray (TWAS) Method at Various Stand-off Distance

“…Typically, these devices consume approximately 20% of the global electrical energy output. Efficiency enhancement initiatives are widely recognized as a critical means of mitigating global environmental impacts and reducing energy consumption, owing to the escalating electricity expenses and the ubiquitous use of pumps in human activities [5]. One of the main components of a pump is the impeller [6], which is often subject to damage such as cavitation, corrosion, and wear [7].…”