molten salt solar receiver and procedure to reduce the temperature gradient in said receiver . the receiver consists of at least one panel of semi cylindrical geometry , formed by a combination of vertical pipes . the receiver is supplied with a heat transfer fluid made up of molten salts which originate from a recirculation system which is composed of a mixture deposit , a hot salt storage tank and a cold salt storage tank ; the mixture tank which is supplied by a part of the hot heat transfer fluid which exits the receiver and the cold heat transfer fluid which exits the cold salt storage tank ; the hot salt storage tank is connected to the exit of the receiver so that a part of the heat transfer fluid which does not recirculate is stored .