A refrigeration plant with a cooling circuit , comprising: - at least one peripheral unit having a refrigeration machine apt to refrigerate a storage compartment; said refrigeration machine having a heat exchanger connected to said cooling circuit for dissipating heat to a secondary fluid flowing therein; - a cooling apparatus connected to said cooling circuit for cooling said secondary fluid; - a control device connected to said cooling apparatus and configured to operate the latter so as to maintain at least an operating temperature of said secondary fluid within at least a corresponding reference range and/or to equalize it to at least a corresponding target value; wherein said cooling apparatus comprises: - a radiator member connected to said cooling circuit and crossable by said secondary fluid to dissipate the heat thereof; - an auxiliary refrigeration machine comprising an evaporator member connected to said cooling circuit for absorbing heat from said secondary fluid, and a condenser member for dissipating heat to the environment; - ventilation means for generating an airflow for cooling said radiator member and said condenser member ; wherein preferably the radiator member is located upstream of the condenser member ; said control device being configured to actuate said ventilation means and/or said auxiliary refrigeration machine in order to regulate said operating temperature of said secondary fluid. - at least one peripheral unit having a refrigeration machine apt to refrigerate a storage compartment; said refrigeration machine having a heat exchanger connected to said cooling circuit for dissipating heat to a secondary fluid flowing therein; - a cooling apparatus connected to said cooling circuit for cooling said secondary fluid; - a control device connected to said cooling apparatus and configured to operate the latter so as to maintain at least an operating temperature of said secondary fluid within at least a corresponding reference range and/or to equalize it to at least a corresponding target value; wherein said cooling apparatus comprises: - a radiator member connected to said cooling circuit and crossable by said secondary fluid to dissipate the heat thereof; - an auxiliary refrigeration machine comprising an evaporator member connected to said cooling circuit for absorbing heat from said secondary fluid, and a condenser member for dissipating heat to the environment; - ventilation means for generating an airflow for cooling said radiator member and said condenser member ; - a radiator member connected to said cooling circuit and crossable by said secondary fluid to dissipate the heat thereof; - an auxiliary refrigeration machine comprising an evaporator member connected to said cooling circuit for absorbing heat from said secondary fluid, and a condenser member for dissipating heat to the environment; - ventilation means for generating an airflow for cooling said radiator member and said condenser member ; wherein preferably the radiator member is located upstream of the condenser member ; said control device being configured to actuate said ventilation means and/or said auxiliary refrigeration machine in order to regulate said operating temperature of said secondary fluid. <EOS>