Heat exchanging unit with a hydrogen adsorption alloy

The combination comprising:

• a heat exchanging unit including:
• an elongated heat transfer element defining an outer surface;
• and a quantity of fine particles of hydrogen adsorption alloy surrounding the outer surface of the heat transfer element for at least a part of its length in a condition such that the fine particles of hydrogen adsorption alloy are bonded to each other to form a close-packed compact, said compact being bonded to the outer surface of the heat transfer element which it surrounds;
• and
• a hollow cylindrical elastic mold defining an inner surface, wherein;
• said heat transfer element is mounted to the mold such that the outer surface thereof is coextensive with a portion of the inner surface of the mold with the diameter defined by said portion being greater than the diameter defined by said outer surface;
• and
• said heat transfer element and said mold form a sealed unit due to the elasticity of the mold when a pressure is applied to said combination, so that an even pressure is applied by the inner surface of the mold and the outer surface of the heat transfer element to the fine particles of hydrogen adsorption alloy for the integral formation of the heat exchanging unit.