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1、制冷空调专业英语,Unit One,Lesson 1 Air Lesson 2 The Need of Conditioning Lesson 3 The Cleaning of Air Lesson 4 Thermal Storage,New Words & Expressions: Text Notes to the Text Exercise,Lesson 4 Thermal Storage,Lesson 4,New Words & Expressions,hydrate,thermal adj.,热的, 热量的,temporary adj.,暂时的, 临时的, 临时性,solar ad
2、j.,太阳的, 日光的,availability n.,可用性, 有效性, 实用性,simultaneously adv.,同时地,backup,n.后援, 支持, 阻塞； vt.做备份,emergency n.,紧急情况, 突然事件, 非常时刻, 紧急事件,reservoir n.,水库, 蓄水池,accomplish vt.,完成, 达到, 实现,n.氢氧化物 ;v.与水化合,Lesson 4,New Words & Expressions:,分开(离), 对.实行种族隔离,density n.,稠密; 浓厚,withdraw vt.,收回, 撤消,standby n.,可以信任的人, 使
3、船待命的信息备用,vessel n.,船, 容器, 器皿, 脉管, 导管,phase n.,阶段, 状态, 相, 相位,transportability n.,可运输性, 应处以流放,component n.,元(部,组)件,成(部)分,viscous adj.,粘性的, 粘滞的, 胶粘的,corrosive adj.,腐蚀的, 蚀坏的, 腐蚀性的,Segregate vt.,Text,Thermal storage is the temporary storage of high or low-temperature energy for later use.1 Examples of th
4、ermal storage are the storage of solar energy for night heating and the storage of summer heat for winter use, the storage of winter ice for space cooling in the summer, and the storage of heat or coolness generated electrically during off-peak hours for use during subsequent peak hours. Most therma
5、l storage applications involve a 24-hours storage cycle, although weekly and seasonal cycles are also used.,热存储暂时存储高温或低温能量，以供以后使用。比如存储太阳能为晚上供热或存储夏天的热量供冬季使用，以及存储冬季的冰以供夏天的空间降温。再比如在用电低峰时期，可以存储电能产生的热量或冷量，以便在随后的高峰期间使用。大多数热存储以24小时作为存储周期，虽然也有以一周和一个季节作为周期的。,Lesson 4,Text:,When the period of energy availabil
6、ity is longer than the period of energy use, thermal storage permits the installation of smaller heating or cooling equipment than would otherwise be required. In many cases, storage can provide benefits for both heating and cooling, either simultaneously or at different times of the year.,Lesson 4,
7、当能量获取的周期比能量使用的周期长时，热存储允许用比实际需要的加热或冷却设备更小。在许多情况下，存储既能在当时，也能在一年内其他的时期为加热和冷却提供好处。,Text:,Conditions favoring thermal storage include high loads of relatively short duration; high electric power demand charges; low cost electrical energy during off-peak hours; need for cooling backup in case of power out
8、age or a refrigeration plant failure (only chilled water pumps must be powered by the emergency generator), need to provide cooling for small after-hour loads such as cooling of restaurants, midheight elevator equipment rooms, individual offices, and computer rooms; building expansion (installation
9、of storage may eliminate the need for heating/cooling plant expansion); need to provide a fire fighting reservoir; need to supplement a limited capacity generation plant; and others.2,Lesson 4,有利于热存储应用的条件包括：相对短的时间内有较高的载荷; 高电力的加载需求; 在低峰期间的低成本电能; 需蓄冷以防停电或制冷设备故障(仅仅是冷水泵需要以紧急发电机驱动)；需要为下班后的小负荷提供制冷，例如餐馆制冷；
10、中等的电梯设备房间、个人办公室以及计算机房间; 建筑物的扩大(存储设备的安装可以不需要扩大加热/冷却机器); 提供消防水池的需要; 需要补充一个小容量的发电机等。,Text:,In sensible heat storage, storage is accomplished by raising or lowering the temperature of the storage medium, i.e. , water, rock beds, bricks, sand, or soil.,Lesson 4,对于显热存储，存储是以提高或降低存储介质，即水、岩床、砖、沙或土壤的温度来完成。,Te
11、xt:,In latent heat storage, storage is accomplished by a change in the physical state of the storage medium, usually from liquid to solid (heat of fusion) or vice versa. Typical materials are water/ice, salt hydrates, and certain polymers. Energy densities for latent heat storage are greater than th
12、ose for sensible heat storage, which results in smaller and lighter storage devices and lower storage losses.,Lesson 4,对于潜热存储，存储是以改变存储介质物理状态来完成的，通常从液体到固体(熔解热)或反过来。典型的物质有水/冰、含盐的水合物和某些聚合物。潜热存储的能密度比显热存储大，从而导致更小、更轻的储藏装置和更低的储藏损失。,Text:,Storage efficiency is the ratio of energy that can be withdrawn from
13、storage, divided by the amount put into storage. Storage efficiencies up to 90% can be achieved in well-stratified water tanks that are fully charged and discharged on a daily cycle. All storage devices are subject to standby losses, which are generally proportional to the exposed surface area of th
14、e storage vessel.3,Lesson 4,存储效率是从存储中能够取出的能量与总的存入能量的比值。以一日为周期在完全分层的水箱中充满水再放掉，可达到90%的存储效率。所有的存储装置都面临备用损失，其损失程度与存储容器暴露在外的表面积成正比。,Text:,For HVAC and refrigeration purposes, water and phase change materials (PCMs)-particularly ice-constitute the principal storage media. Soil, rock, and other solids are
15、also used. Water has the advantage of universal availability, low cost, and transportability through other system components. Some phase change materials are viscous and corrosive and must be segregated within the container for the heat transfer medium. If heating and cooling storage is required, tw
16、o phase change materials must be provided, unless heat pumping is used.,Lesson 4,为了暖通空调和制冷，水和相变材料(脉码调制)特别是冰组成主要的存储介质。 另外，土壤、岩石以及其他固体也被使用。 水的优点是可以较易获取，费用低，通过别的系统部件就能输送。而一些相变材料是粘滞性和腐蚀性的，并且必须在容器内分离开来作为热传递介质。如果需要储热与储冷，那么除非使用热泵，否则必须提供两种相变材料。,Notes to the Text,Lesson 4,Notes to the Text,1.Thermal storage is the temporary storage of high or low-temperature energy for later use.,Lesson 4,thermal storage 应译为“热储存，蓄热以显热形式（温升）或潜热形式（相变）积聚在一物体或系统中的热量”。,Notes to the Text,2.Conditions favoring thermal sto
