Moving-bed particle heat exchanger

A particle heat exchanger comprising:

• a housing including:
• an inlet located at the top of the housing, and
• an outlet located below the inlet,
• the housing configured to enclose a flow of heat transfer particles which flows downwardly from the inlet to the outlet within the housing;
• at least one heat transfer tube including a heat transfer medium, each heat transfer tube being enclosed in the housing and in contact with the flow of heat transfer particles therein, each heat transfer tube extending substantially parallel to an axis extending between the inlet and outlet of the housing;
• and
• at least one divider located between the inlet and outlet of the housing, the at least one heat transfer tube extending through each divider, each divider including at least one opening configured to form at least one flow constriction in the flow of heat transfer particles between the inlet and outlet of the housing.