Temperature and relative humidity analysis for the generator floor in main powerhouse of underground hydropower station

The generator floor in a main powerhouse is one of the most important places in the station, where effective control of the temperature and relative humidity to meet the requirements of equipment operation and personnel health is a major problem that needs designers to solve by. To find the causes of deviation in the air temperature and humidity, analyzes the air handling process with psychometric charts, proposes the influence of the air rate and cooling capacity deviation on the temperature and humidity. Concludes that the deviation is mainly due to the unmatched air rate and cooling capacity of the air conditioner and puts forward corresponding solutions which can be used as a reference for the air conditioner type selection design.