Experimental investigation of a rotating drum heat exchanger for latent heat storage

With latent heat thermal energy storages, can be stored at a constant temperature level with high storage density using the enthalpy of solid-liquid phase change material. During discharge process storage, material (PCM) solidifies transfer surface and increases resistance. This decreases transferred power time state charge. The rotating drum exchanger, experimentally investigated in detail for first this paper, overcomes limitation by removing PCM layer. While fluid passes through inside drum, which is partially immersed liquid PCM, outer side. solidified layer removed each rotation fixed scraper. Thus, thickness are kept over time. separately from phase, resulting complete independence capacity. A commissioned experimental test rig low used investigation potential, thicknesses, mechanical needed removal as proof concept. data show consistent increasing higher rotational speeds. presented rig, up to 6.8 kW?m?2 based on total drums shell difference 5 K between melting point transfer. Adhering 60% also after left PCM. measured below 0.05 mm speeds, adhering slightly increasing. results potential exchanger concept generation steam out