轮机英语教学课件(21) Air Conditioning System

Air Conditioning System
Analysis of some long and difficult sentences:
1.Air conditioning systems fall into two main classes: individual unit systems, in which each room contains its own small refrigeration plant and fan and air cooler; and central systems, where larger refrigeration machinery units are installed and their output distributed about the ship by a variety of means.
Air Conditioning System phrases
air conditioning system individual unit system central system self-contained units the single duct system individual temperature
译文:即使是控制一单人舱室的直接作用式的温度调节器的位置也必须精 心选定，如果它被遮蔽在窗帘后面，或者离供风进口太远， 控制就会 不灵敏。
分析：该句主语是the site, for a direct acting thermostat 是其后置定语， to control one single berth 是 thermostat 后置定语, must be chosen ， with care为方式状语。if … sluggish.是前文的解释,其主语是control, sluggish为表语, behind curtains, or too far away from the air inlet 均为 条件状语从句中的地点状语。
Air Conditioning System
Focus: 1.What are the two main classes of air conditioning system? 2.What are differences between the individual unit system and the
control high velocity low velocity air circulation
prefabricated standard ducts air terminal sound insulation material a centrifugal fan a direct expansion cooler thermostatic control the air inlet control
Air Conditioning System
5. This position may be affected more by an open door or draught in the alleyway than by the temperature of the cabins.
译文: 这个位置可能会因为门开着或受走廊通风的影 响而 比受舱室温度的影响更大。
译文:在典型的单体船用空调装置中,空气的循环是通过低噪音 的离心式风机和由封闭式压缩机抽气的直接膨胀式冷却器 来实现.
分析：该句主语是air circulation , 谓语是is effected , In a typical marine pattern self-contained unit是状语, by means of…为方式状语, of的宾语有两个,“ a centrifugal fan, and a direct expansion cooler”，“ for quiet running”为目 的状语，“ served by a hermetic compressor”是cooler 的后 置定语。
Air Conditioning System
2.This tendency helps installation as the size of ducts is reduced and prefabricated standard ducts can be used , but it incurs the heavier running costs of more powerful fans.
Air Conditioning System
4.Even the site for a direct acting thermostat to control one single berth cabin must be chosen with care---if it is masked behind curtains, or too far away from the air inlet control will be too sluggish.
译文:空调系统主要分两类。在单体式空调系统中，各个房间有各自的小型制 冷装置、风机和空气冷却器。在中央空调系统中，装备了较大型的制冷 装置，它的输出以各种方式遍及全船。
分析：“two main classes ”and “indial systems”为同位语， “in which ”从句修饰“individual unit systems”， “where”修饰central systems 均为定语从句
Air Conditioning System
3. In a typical marine pattern self-contained unit, air circulation is usually effected by means of a centrifugal fan, for quiet running, and a direct expansion cooler served by a hermetic compressor.
译文:这种趋势有利于安装工作,因为所采用的风管尺寸减小,预制的标 准尺寸风管也可以使用,但也因采用大功率鼓风机而运行成本增 加.
分析：as从句为原因状语从句,是一个and连词连接的并列句,第一分句 为“ the size of ducts is reduced” , 第二分句的主语是ducts , but 后为另一个句子,与前主句并列,形式主语是it, “ the heavier running costs” 是真正的主语。
译文:如果回风格栅离外门很近,当门打开时,处于此位置的 温度调节器受外界空气温度的影响比受室内温度的影响 更大.
分析：该句主语是position, “If the recirculation grill is close to an outside door”为条件状语从句, by outside air temperature是方式状语, when the door is open为时间状 语, rather than by cabin temperature为比较方式状语.
6.If the recirculation grill is close to an outside door , this position too can be affected by outside air temperature when the door is open, rather than by cabin temperature.
分析：more…than 为比较状语,其中by an open door or draught和 by the temperature 都是方式状语, in the alleyway是draught的后置定语, of the cabins是 temperature的定语.
Air Conditioning System
Lesson 21 Air Conditioning System
Air Conditioning System
1. Phrases 2. Focus 3. Analysis of some long and difficult sentences 4. Some choices related to the competency test 5. Some supplement reading materials
central system? 3.What are the basic requirements of the air conditioning system? 4.All types of thermostats are found in air conditioning system.
What are they?