We do also have more complex systems that are used for space heating and they fall into two categories, passive and active heating systems.

我们确实也有更复杂的系统用于空间供暖，它们分为两类，被动供暖系统和主动供暖系统。

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So we make buildings that require very little heating in the winter or indeed very little cooling in the summer.

VOA: special.2009.10.05

so I'm heating up the system in this path here, and then to connect the 2 endpoints here, a constant temperature path.

需要再用，一个等温过程，这两个状态。

麻省理工公开课 - 热力学与动力学课程节选

So what I'm doing here is I'm cooling, and then when I'm sitting at a fixed volume and I'm increasing the pressure, what am I doing? I'm heating, right?

对了，因此在这里，需要冷却,而在这里，当体积不变增加压强时？

麻省理工公开课 - 热力学与动力学课程节选

It is already used for heating buildings and for all sorts of industrial heating.

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The next stage is to link this exchanger to a district-heating system so that it can be pumped into central heating.

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About 75 percent of our heating comes from heating plants and private people who have changed their oil furnaces to something renewable.

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