急~~急~~~急~~急--大家帮忙翻译下,谢谢~~

来源：百度知道 编辑：UC知道 时间：2024/05/21 20:54:56
1:在选择制冷循环的工作液体时，液体的低温性能呈一个重要的因素,例，如水在0摄氏度以下就不能用，甚至在中等的低温下也必须使蒸发面部分保持真空。在很低温度下氨被广泛地用作制冷剂，但是不常用在空调设备中，因为当管道或蒸发器系统出现泄漏时，有毒的氨就会漏出。

2:古代文明已经能利用天然的制冷方法,罗马统治者让奴隶们从高山上运来冰、雪以保存食物，为夏季提供冷饮。当然这种天然冷源受到地理位置、气温和范围的极大限制。用机械制冷的方式称机械制冷，这一方法从19世纪50年代发展起来的。

3:准确理解术语“热”和“温度”是热力学研究的目标之一，直观地说，温度的物理意义是描述一个物体是“冷”还是“热”。例如我们用手去触摸120F的金属，得出的结论是它比一块冰热，理由是热的金属把热能传给了手，而冷的冰块则从手上吸收热能.
4:如果物质以饱和温度下的气态存在则称为饱和蒸汽，有时用干饱和蒸汽这个术语来强调其干度为100%。当蒸汽温度比其饱和温度高时，为过热蒸汽。过热蒸汽的压力和温度是独立参数，因为当压力保持不变时，其温度可以增加，气体是高度过热的蒸汽

1: at work liquid that choose the cold circulation in system, the low temperature function of the liquid reports an important factor, example, such as water at 0 the degree of Celsius below can't use, even under the medium low temperature also must make the cent of evaporation face keep the vacuum.Under very the low temperature degree the ammonia were used to broadly cold in system, but seldom use in air-condition, because when piping or evaporate the machine system appears to leak, poisonous ammonia will leak.

2: the ancient civilization has caned make use of the cold method in natural system, the ruler of Rome let slaves carrying to come to ice, snow from the high mountain to keep food, provide the cold drink for the summer.Certainly this kind of natural and cold source suffers the geography position, air temperature the scope to limit biggest.Call the machine system with the cold way in machine system cold, this method develops something to get up from the 50'