Method for monitoring change of relative air content in condensing thermal power unit condenser

It is a method of monitoring the change of the relative content of air in the condenser of condensing thermal power unit. Firstly, a pressure gauge and a temperature gauge through which obtain the pressure value and the temperature value surveyed are installed on the pork pumping air near the condenser; utilizing the formula, epsi=(p-f(t)/p)X100% gets the relative content of the air in the tube pumping air, and f(t) is the function that known temperature of saturated steam solves saturated pressure, t is the temperature and P is the pressure. The invention can get the relative content of the air in the tube pumping air, the change of the relative content reflects the change of the relative content of the air in condenser, and according to it reflects the influence degree of air to the performance of the condenser, so that guiding the operating personnel to take the corresponding technological measure.