Ultra-supercritical tower-type solar heat absorber

An ultra-supercritical (USC) tower-type solar heat absorber, comprising:

• a plurality of grille-hot-plate current-sharing screens, a plurality of tube rows, and a graphite filling layer, wherein each of the plurality of grille-hot-plate current-sharing screens is assembled by a plurality of grille hot plates independent of each other;
• and when sunlight is reflected and concentrated on the plurality of grille-hot-plate current-sharing screens, heat transfer is allowed by a phase transition of a phase-transition working medium inside the grille hot plates, and heat is transferred through the graphite filling layer to the plurality of tube rows embedded in the graphite filling layer and taken away by a heat-transfer medium flowing through the plurality of tube rows;
• each of the plurality of grille hot plates comprises a heat-absorbing plate, a metal fiber felt, a metal wire mesh, a grille, a sealing plate, and an intermediate partition plate;
• wherein the metal fiber felt, the metal wire mesh, the grille, and the intermediate partition plate are sequentially arranged on an evaporation surface of the heat-absorbing plate;
• the metal fiber felt is tightly attached to the evaporation surface of the heat-absorbing plate, and the metal wire mesh covers a surface of the metal fiber felt, the metal fiber felt and the metal wire mesh together constitute a liquid-absorbing core;
• the grille is directly connected to a condensation surface of the intermediate partition plate and extends obliquely to the metal wire mesh and the grille hot plate is enclosed by the sealing plate, filled with the phase-transition working medium, and pumped to a vacuum state.