Air cooled condenser and power generating apparatus provided with the same

An air cooled condenser comprising:

• a cooling device including:
• a plurality of heat exchangers for air-cooling a working medium, the plurality of heat exchangers comprising:
• a first heat exchanger for air-cooling the working medium indirectly through a first wall;
• and
• a second heat exchanger for air-cooling the working medium indirectly through a second wall, the second heat exchanger being different from the first heat exchanger;
• a first fan for supplying cooling air only to the first heat exchanger of the plurality of heat exchangers;
• a second fan for supplying cooling air only to the second heat exchanger of the plurality of heat exchangers;
• a pressure detector for detecting a pressure value of the working medium at an outlet of at least one of the first heat exchanger or the second heat exchanger;
• and
• a controller configured to control the cooling device such that the pressure value obtained by the pressure detector comes closer to a target value set to be equal to or larger than an atmospheric pressure, wherein:
• the controller reduces a rotating speed of the first fan when the pressure value obtained by the pressure detector is smaller than the target value, and increases the rotating speed of the first fan when the pressure value obtained by the pressure detector is larger than the target value;
• the cooling device includes:
• a branching pipe for branching the working medium into a plurality of working media and for distributing the plurality of working media to inlets of the first and second heat exchangers, respectively;
• an aggregating pipe for aggregating the plurality of working media from outlets of the first and second heat exchangers, respectively;
• and
• a plurality of valves arranged at the inlets or the outlets of the first and second heat exchangers, respectively,
• the controller opens an increased number of valves of the plurality of valves when the rotating speed of the first fan is higher than an upper limit value, and opens a reduced number of valves of the plurality of valves when the rotating speed of the first fan is lower than a lower limit value, and
• the controller determines whether or not the rotating speed of the first fan is higher than the upper limit value and all of the plurality of valves are opened, and activates the second fan when it is determined that the rotating speed of the first fan is higher than the upper limit value and all of the plurality of valves are opened, and deactivates the second fan when it is determined that the rotating speed of the first fan is lower than the lower limit value.