Influence of air conditioning system without humidification on indoor air parameters in winter of Kunming region

Based on the mass conservation equation, deduces a calculation formula of the indoor air humidity ratio when air conditioning system without humidification operating in winter. Generally considers the major influencing factors of the humidity ratio, obtains the conditions used to estimate the relative humidity. Furthermore, investigates whether the indoor relative humidity meets the design requirements in typical air conditioning rooms without humidification in winter of Kunming region. The results show that in the air conditioning rooms without humidification in winter of Kunming region, the relative humidity of the mall exceeds the required value and needs to dehumidify, and the relative humidity of multi-purpose halls and restaurants in the hotel can meet the required value. But the relative humidity of movie theaters and hotel guestrooms can not meet the required value without humidification.