Method for function monitoring and/or control of a cooling system, and a corresponding cooling system

A method for monitoring the function and the operational reliability of a cooling system having at least one thermosyphon, for transformers, the cooling system including at least one evaporator and at least one condenser, and using a coolant which can be vaporized in the at least one condenser and a gaseous medium, as a heat carrier in the at least one evaporator, the method comprising:

• determining a heat exchanger effectiveness of the cooling system wherein a global effectiveness ε of the at least one thermosyphon is determined using the relationship
• ɛ
• =
• (
• T
• env
• -
• T
• condens
• out
• )
• (
• T
• env
• -
• T
• evap
• in
• )
• or
• ɛ
• =
• (
• T
• evap
• in
• -
• T
• evap
• out
• )
• (
• T
• evap
• in
• -
• T
• env
• )
• which is a ratio of a difference between temperatures at a condenser inlet (Tenv) and at a condenser outlet (Tcondensout) to a difference between a temperatures at the condenser inlet (Tenv) and at an evaporator inlet (Tevapin),
• comparing the evaporator inlet temperature with plural temperature threshold values;
• comparing the global effectiveness ε of the at least one thermosyphon with plural effectiveness threshold values;
• and
• generating a warning signal when comparison results based on the plural temperature threshold values and comparison results based on the plural effectiveness threshold values are outside predetermined limits,
• wherein temperature measurements are carried out one of sequentially to reduce a number of measurement channels used to record temperature characteristic values or at a same time.