The absolute temperature and thermodynamic pressure of a non-equilibrium system are obtained from the generalized entropy equation and their explicit expression forms are also given for a monatomic idea gas.

The data of hourly outside dry-bulb temperature are often needed in the calculations and applications of many areas.

A series of corresponding curves was drawn according to the results of experiments and then the influences of outdoor dry-bulb temperature and indoor wet-bulb temperature upon the performance of household air-conditioner were analyzed.

The results show that in the same refrigeration system,the indoor wet-bulb temperature and outdoor dry-bulb temperature have a stronger influence than the indoor dry-bulb temperature and outdoor wet-bulb temperature.

By analyzing and determining the annual probability distribution parameters in simplified double wave model for annual dry bulb temperature,this paper creates the truncated normal distribution model to make the application more precise.

The relativity of negative absolute temperature system;

This thesis starts with the Bucher diagrams of the Carnot cycle in positive absolute temperature,then introduces the readers to the Bucher diagrams of the Carnot cycle in negative absolute temperature;at the same time the thesis makes a definition of the coefficient of performance in Carnot cycle under the condition of negative absolute temperature.

From thermodynamic point of view the negative absolute temperature were analyzed.