Heat exchanger based liquid storage systems have numerous applications such as solar water heating systems and chemical processes. One of the most common heat exchanger based storage systems uses a concentric or mantle heat exchanger around the storage tank. In this configuration, fluid from a heat source travels around the annular gap enclosing the central storage tank and transfers heat to the liquid in the central storage tank. Due to the simultaneous occurrence of both cooling and heating processes, the performance of a concentric heat exchanger is quite complex and its characteristics differ significantly from traditional heat exchangers. The flow and heat transfer characteristics of an annular heat exchanger were investigated numerically, and the calculated flow patterns and heat transfer were compared with experimental data. A heat exchanger deficiency coefficient was developed to quantify the degradation of thermal stratification in the inner storage tank caused by the flow in the annulus.
|Number of pages||6|
|Journal||Computer Modeling and Simulation in Engineering|
|Publication status||Published - 1998|