首页
登录
职称英语
These days, many large city buildings are equipped with their own air-condit
These days, many large city buildings are equipped with their own air-condit
游客
2024-02-06
21
管理
问题
These days, many large city buildings are equipped with their own air-conditioning systems. These systems help keep the buildings cool, but they can also damage the environment. Since they use a lot of electricity, for instance, they contribute indirectly to global warming. In addition, the water that flows through the systems is often cooled using chemicals called chlorofluorocarbons, or CFCs, that are believed to damage the Earth’ s ozone layer. Recently, though, a system has been built in the city of Toronto, Canada, that cools buildings with little damage to the environment.
In the traditional air-conditioning systems found in most large buildings, water is pumped through the building in a continuous cycle. The water is first cooled to a temperature of 4°C in machines called chillers. It is then sent to individual units that cool the air in each room. As the water flows through the building, it gradually becomes warmer. Finally, it reaches the roof, where it is left to cool down naturally in a water tower. After that it is returned to the chillers, where the cycle begins again.
Toronto lies on the shore of Lake Ontario, one of North America’s Great Lakes, and the new system makes use of cold water taken from about 80 meters below the surface of the lake. At this depth, the water in the lake remains at 4°C all year round. This is exactly the temperature to which the water in air-conditioning systems is cooled. However, the water from the lake is not pumped directly into the air-conditioning systems. Instead, it is used to cool the water that is already inside the air-conditioning systems. After that, the lake water is added to the city’s ordinary water supply.
Enwave, the company that developed this deep-lake cooling system, says that it uses 75 percent less energy than traditional air conditioning. And since no CFCs are used, no damage can be caused to the ozone layer. Not every city is located next to a large lake, but experts believe that systems like the one being used in Toronto could be built elsewhere by using other natural sources of cold water. [br] What is the function of the chillers in a traditional air-conditioning system?
选项
A、They pump the air continuously to the units in each room.
B、They lower the temperature of the water in the system.
C、They help the water cool down naturally on the roof.
D、They gradually clean the water as it flows through the building.
答案
B
解析
细节题。短文第二段指出The water is first cooled to a temperature of 4℃ inmachines called chillers.即chiller的作用就是制冷。故选B。
转载请注明原文地址:https://tihaiku.com/zcyy/3427925.html
相关试题推荐
[originaltext]TwohoursfromthetallbuildingsofManhattanandPhiladelph
[originaltext]TwohoursfromthetallbuildingsofManhattanandPhiladelph
[originaltext]TwohoursfromthetallbuildingsofManhattanandPhiladelph
Thesedays,manylargecitybuildingsareequippedwiththeirownair-condit
Thesedays,manylargecitybuildingsareequippedwiththeirownair-condit
Thesedays,manylargecitybuildingsareequippedwiththeirownair-condit
Thesedays,manylargecitybuildingsareequippedwiththeirownair-condit
Thesedays,manylargecitybuildingsareequippedwiththeirownair-condit
[originaltext]TwohoursfromthetallbuildingsofManhattanandPhiladelph
[originaltext]TwohoursfromthetallbuildingsofManhattanandPhiladelph
随机试题
Inthenexttwoandahalfyears______jobswillbecutbySony.[br][original
Thebookfromwhich"allmodemAmericanliteraturecomes"refersto_______.A、Mo
Itwouldbeinterestingtodiscoverhowmanyyoungpeoplegotouniversityw
女,40岁,右下肺炎,用青霉素治疗后热退,3天后又发热,白细胞总数持续增高。其原
A.任脉 B.督脉 C.冲脉 D.阳跷脉 E.阳维脉具有调节六阳经经气作
按人体之精的特殊功能划分,则有A.先天之精 B.后天之精 C.脏腑之精 D
局部麻醉药的作用原理是阻滞细胞膜上的A.氯通道 B.钠通道 C.钙通道 D
某药业公司乙醇提取车间提取工艺用到浓度为70%~95%的乙醇液体,闪点为11.7
基础心理学是研究()。 (A)正常成人心理现象的心理学基础学科 (B
进口商品需对外索赔出证的,货主或其代理人应在索赔有效期前不少于()天向到货口岸
最新回复
(
0
)