The present invention relates to a low-carbon, low-cost agricultural heat-retaining apparatus using the frictional heat of water. The agricultural heat-retaining apparatus according to the present invention comprises: a housing in which an inlet, through which water flows in, and an outlet, through which water is discharged, are defined a rotating drum which is rotatably installed inside the housing, which is formed so as to have a cylindrical shape and one open end, and in which a plurality of first orifice holes, which are formed so as to be skewed in the direction opposite that in which the rotating drum rotates, are defined a cylindrical fixed drum which is fixedly installed a certain distance apart from the inside or outside of the rotating drum, and in which a plurality of second orifice holes, which are formed so as to be skewed in the same direction as that in which the rotating drum rotates, are defined a drive motor for rotating the rotating drum with respect to the housing a spindle for transmitting the power from the drive motor to the rotating drum a water impeller, which is installed on the outer periphery of the spindle, for forcibly feeding water from the outside of the inlet to the inside of the inlet and a guide member, which is installed within the inlet, for guiding the water fed by means of the water impeller toward the center of the rotating drum.Cette invention concerne un appareil calorifuge à visée agricole, à faible émission de carbone, et bas coût utilisant la chaleur frictionnelle de leau. Lappareil calorifuge à visée agricole selon linvention comprend : un carter comportant une admission, par laquelle leau est introduite, et une évacuation, par laquelle leau est déchargée un tambour rotatif monté rotatif à lintérieur du carter, qui est formé de manière à présenter une forme cylindrique et une extrémité ouverte, et comportant une pluralité de premiers orifices, qui sont formés de manière à être obliques dans un sens opposé au sens de rot
