Optimal design methodology of metal hydride reactors for thermochemical heat storage

Performance analysis of a high-temperature magnesium hydride reactor tank with a helical coil heat exchanger for thermal storage

“…Towards the end of the reaction, the temperature of the reactor drops below the inlet temperature of the HTF due to the heat loss from the reactor to its surroundings. It is important to notice that unlike previous simulations which assume adiabatic boundary condition, the radial temperature gradient in this case is negligible due to the combined effect of heat loss to the surroundings in addition to the heat exchange to the HTF from the MH bed and the shorter distance between the HTF and MH bed in the radial direction [53,54]. Moreover, due to the consideration of the temperature rise of the HTF, the variable temperature contours were visible from top to bottom in the axial direction at different time steps.…”

“…Out of these techniques, the helical coil heat exchanger is found to be an attractive option due to high surface area and the secondary flow associated with it [51][52][53][54]. Supporting evidence for this was found in a numerical investigation of the desorption process inside of a MgH2 based reactor equipped with a helical coil heat exchanger, where the performance was shown to be superior compared to other heat exchanger configurations [52].…”

A and B site Co-doping of CaMnO3: a route to enhanced heat storage properties

“…A range of reactive materials (e.g. carbonates 8 to hydroxides 9,10 and hydrides 11 to oxides 12,13 ) have been investigated for TCS systems. None of the materials evaluated to date achieve both the cost and efficiency targets for a CSP plant.…”

Enhancement of the metal hydride hydraulic pump efficiency by integrating a phase change material

“…Chabane et al 14 presented a thermal coupling topology of a proton exchange membrane fuel cell with a FeTi MHR for vehicular applications. Feng et al 15 proposed an optimal design methodology for MH heat storage reactors integrating the optimal design principle and a new design procedure. Khayrullina et al 16 developed a novel kW‐scale power production unit that utilizes metal‐hydride energy storage and a 1 kW PEM fuel cell.…”

“…A numerical analysis of the performance of a seven-stage MH hydrogen compression system was introduced, presented, and discussed by Gkanas et al 12 A multistage MH heat pump for space air-conditioning was studied numerically by Shajiullah et al 13 The considered pump produces multiple heating and cooling outputs at 20 C and 45 C, respectively, with a single heat source at 160 C. Chabane et al 14 presented a thermal coupling topology of a proton exchange membrane fuel cell with a FeTi MHR for vehicular applications. Feng et al 15 proposed an optimal design methodology for MH heat storage reactors integrating the optimal design principle and a new design procedure. Khayrullina et al 16 developed a novel kW-scale power production unit that utilizes metal-hydride energy storage and a 1 kW PEM fuel cell.…”