pump system has magnetic heat

In a magnetic heat pump system (30), wherein a heat transfer medium (42) is heated or cooled by a magnetocaloric effect material (26) arranged in a pump device for magnetic heat (30A). A material (40) having a coefficient of thermal conductivity which is higher than the heat transfer medium (42), or a material (40) having a specific heat or volume specific heat, which is greater than the heat transfer medium (42 ) is mixed with the heat transfer medium (42). A coefficient of thermal conductivity of the heat transfer medium (42) is thus increased to enhance the heating performance and / or cooling of the magnetic heat pump system (30).