摘要
地球系统中的水在太阳辐射的作用下,在地表高温状态下吸热发生由液态到气态的相变,水汽上升到空中后在低温状态下凝结为雨或雪而放热,雨雪在重力的作用下返回地面,这种水的相变传热会导致地球系统中负熵的出现。对该负熵的数量级作了估算。同时讨论了大气的垂直传热与重力场效应引起的负熵。
The natural phenomenon of heat transfer of phase transformation is studied. This cyclical process leads to the negative entropy flow in the earth system. The magnitude orders of negative entropy flow are calculated. The negative entropy flow caused by the vertical heat transfer at atmosphere and the effect of the gravitational field are calculated. The calculation results show that there is little difference in magnitude orders of the negative entropy flow of the two heat transfer forms.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2007年第2期108-110,共3页
Journal of North China Electric Power University：Natural Science Edition
关键词
地球系统
负熵流
太阳辐射
水的相变传热
重力场
earth system
negative entropy flow
solar radiation
heat transfer of phase transformation
gravitational field
