一、低位热能及其在制冷上的应用概况我们知道能量在转化过程中,分解为二部分。第一部分能的转换为可逆性的,即转换后的能具有作功的能力,称为有效能(即(火用));第二部分能的转换为不可逆性的,即转换后的能无作功能力,而是转化为热量排放于环境,称为无效能(即(火无))。有效部分占总能量的百分比称为能量有效利用率。目前,我国能量有效利用 First, the low heat and its application in refrigeration At a Glance We know that energy in the conversion process, broken down into two parts. The first part of the conversion of energy is reversible, that is, the transformed ability to work, called the effective (ie exergy); the second part of the conversion can be irreversible, that is, after the conversion of energy Instead, it is converted into heat that is emitted into the environment and called ineffective (ie, absent). The percentage of the effective part of the total energy is called the energy efficient utilization. At present, China’s energy is used effectively