什么叫热传递?一个系统,在没有对它做功,而只有温度差的情况下,系统中的能量(或热量)从一个物体转移到另一个物体上,或从物体的一部分转移到另一部分的过程,称为热传递。 热传递又分为哪几种?有什么特点? 热传递又分热传导、热对流和热辐射。在实际过程中,这三种热传递方式总是同时存在、相伴相随进行。 What is heat transfer? A system in which energy (or heat) is transferred from one object to another, or from one part of an object to another, without working on it, and only with a temperature difference Process, called heat transfer. Heat transfer is divided into several? What are the characteristics? Heat transfer is divided into heat conduction, convection and heat radiation. In the actual process, these three heat transfer methods are always present at the same time, accompanied by each other.