PRELIMINARY STUDY OF INDOOR FEATURES OF TEMPERATURE AND HUMIDITY FOR ROOMS FACING NORTH-SOUTH IN WINTER IN A LOW-LATITUDE PLATEAU CITY

Analyzing observations of wintertime air temperature in both indoor and outdoor surroundings in Kunming,a city lying in low latitudes,characteristics of temperature and humidity have been studied for the interior of rooms facing north-south under differnet weather conditions ,Signicant warming effect has been identified in terms of lowest and daily-mean indoor temperature in the area of Kumming.The heating amplitude ranges from 7.7℃ to 10.0℃ and from 4.6℃ to 5.8℃ for the interior part of rooms facing the south and from 4.6℃to 7.0℃and from 1.3℃ to 4.4℃ for the interior part of rooms facing the north,respectively for the two elements,The highest air temperature is higher indoor than outdoor for rooms facing the south,but otherwise is usually true for rooms facing the north,Additional findings point out that buildings not only help maintain relatively warm indoor temperature but delay its variation.The diurnal cycle of temperature indoor is smaller and ranges by 40%-48% for south-facing rooms,and by 20%-30% for north-facing rooms,than outdoor,and the highest temperature is about 2 hours hate inside the room than outside.It shows how inertly indoor temperature varies.The work also finds that relative humidity is less indoor in southward rooms than in northward ones and difference is the largest on fine days but the smallest when it is overcast.For the diurnal variation,the indoor relative humidity is large at nighttime with small amplitude but small during daytime with large amplitude.The above-presented results can be served as scientific foundation for more research no climate in low-latitude cities and rational design of urban architectures.

Analyzing observations of wintertime air temperature in both indoor and outdoor surroundings in Kunming, a city lying in low latitudes, characteristics of temperature and humidity have been studied for the interior of rooms facing north-south under different weather conditions. Significant warming effect has been identified in terms of lowest and daily-mean indoor temperature in the area of Kunming. The heating amplitude ranges from 7.7C to 10.0C and from 4.6C to 5.8C for the interior part of rooms facing the south and from 4.6C to 7.0C and from 1.3C to 4.4C for the interior part of rooms facing the north, respectively for the two elements. The highest air temperature is higher indoor than outdoor for rooms facing the south, but otherwise is usually true for rooms facing the north. Additional findings point out that buildings not only help maintain relatively warm indoor temperature but delay its variation. The diurnal cycle of temperature indoor is smaller and ranges by 40% ~ 48% for south-facing rooms, and by 20% ~ 30% for north-facing rooms, than outdoor, and the highest temperature is about 2 hours late inside the room than outside. It shows how inertly indoor temperature varies. The work also finds that relative humidity is less indoor in southward rooms than in northward ones and difference is the largest on fine days but the smallest when it is overcast. For the diurnal variation, the indoor relative humidity is large at nighttime with small amplitude but small during daytime with large amplitude. The above-presented results can be served as scientific foundation for more research on climate in low-latitude cities and rational design of urban architectures.