Air cooled condenser and power generating apparatus provided with the same

An air cooled condenser comprising:

• a cooling device including:
• a heat exchanger for air-cooling a working medium indirectly through a wall;
• and
• a first fan for supplying cooling air to the heat exchanger;
• a pressure detector for detecting a pressure value of the working medium at an outlet of the heat exchanger;
• and
• a controller for controlling 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 plurality of the heat exchangers;
• 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 plurality of heat exchangers, respectively;
• an aggregating pipe for aggregating the plurality of working media from outlets of the plurality of heat exchangers, respectively;
• and
• a plurality of valves arranged at the inlets or the outlets of the plurality of heat exchangers, respectively;
• and
• 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.