首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Geothermal(地热)Energy 1 Since heat naturally moves from hotter regions to cooler ones, the heat from the earth’ s center flows ou
Geothermal(地热)Energy 1 Since heat naturally moves from hotter regions to cooler ones, the heat from the earth’ s center flows ou
admin
2016-08-16
56
问题
Geothermal(地热)Energy
1 Since heat naturally moves from hotter regions to cooler ones, the heat from the earth’ s center flows outwards towards the surface. In this way, it transfers to the next layer of rock. If the temperature is high enough, some of this rock melts and forms magma(岩浆). The magma ascends in its turn towards the earth’ s surface. It often remains well below the earth’ s surface, creating vast areas of hot rock. In such regions, there are deep cracks, which allow rainwater to descend underground. Some of the heated rainwater travels back up to the earth’ s surface where it will appear as a hot spring. However, if this ascending hot water reaches a layer of impermeable(不可渗透的)rock, it remains trapped, forming a geothermal reservoir. If geothermal reservoirs are close enough to the surface, they can be reached by drilling wells. Hot water and steam shoot up the wells naturally, and can be used to produce electricity in geothermal power plants.
2 A few geothermal power plants depend on dry-steam reservoirs which produce steam but little or no water. In these cases, the steam is piped up directly to provide the power to spin a turbine(涡轮)generator. The first geothermal power plant, constructed at Lardarello in Italy, was of this type, and is still producing electricity today.
3 Most currently operating geothermal power plants are either "flash" steam plants or binary(双重的)plants. Flash plants produce mainly hot water ranging in temperature from 300° to 700°Fahrenheit. This water is passed through one or two separators where released from the pressure of the underground reservoir, it "flashes" or boils into steam Again, the force of this steam provides the energy to spin the turbine and produce electricity. The geothermal water and steam are then reinjected directly back down into the earth to maintain the volume and pressure of the reservoir. Gradually they will be reheated and can then be used again.
4 A reservoir with temperatures below 300° Fahrenheit is not hot enough to flash steam,but it can still be used to generate electricity in binary fluid. The steam from this is used to power the turbines. As in the flash steam plants, the geothermal water is recycled back into the reservoir.
A Dry steam plants
B Binary plants
C Origin of geothermal energy
D Generation of electricity
E Flash steam plants
F Recyclable water and steam
Paragraph 1______
选项
答案
C
解析
本段首句讲到热能是从炎热地区向寒冷地区流动,所以热能也是从地心向地球表面流动。接着又讲地热熔化了石头变成岩浆,雨水渗入岩浆烘热的岩石缝形成温泉,若遇到不可渗透的岩石则形成地热储层,可就势建起地热发电厂。故C项“地热能的起源”可以概括本段。
转载请注明原文地址:https://kaotiyun.com/show/HhGd777K
本试题收录于:
职称英语理工类A级题库职称英语分类
0
职称英语理工类A级
职称英语
相关试题推荐
Becauseofharshweatherconditions,morethanadozenstatesintheUnitedStatesweredeclareddisasterareasin1977.
CollegeSportsintheUSCollegesportsintheUnitedStatesareahugedeal.AlmostallmajorAmericanuniversitieshavef
TheGreatestShowonEarthTheOlympicGames(奥林匹克运动会)arethegreatestfestivalofsportintheworld.Everyfouryears,a
Farmers’MarketsCharlotteHollinsknowsshefacesabattle.The23-year-oldBritishfarmerandher21-year-oldbrotherBen
Toreducecarcrashrate,manyscientistsareworkinghardtoAccordingtothesecondparagraph,mostroadaccidentshappendue
Bydescribingatypicalsituationofalostdriverontheroad,theauthorintendstoWithoutsignalsfromnavigationsatellite
Bydescribingatypicalsituationofalostdriverontheroad,theauthorintendstoTheword"navigate"inParagraph3means
AccordingtoRobertBell,ifmobilephonesprovetobedangeroustopeople’shealth,Howmanymobilephoneuserswilltherebe
TheU.S.facessevereeconomicproblems.
Therevelationofhispastledtohisresignation.
随机试题
起动型铅蓄电池常用的充电方法有_______、_______和_______等几种。
通过测量发现管/地电位正负极性交变时,且环境腐蚀性较强,应采用()保护措施。
肾肿瘤病人的护理诊断。
发生危机后才开始进行政策的分析,匆忙提出建议,犯下一知半解、生搬硬套的错误。这种错误属于()
清代由军机处直接下达的机密指令,不经过内阁,由军机处封缄严密后,或直接交职能机构办理,或直接寄送地方官员,这种谕旨下达方式是()
注意缺陷障碍以_________、_________、_________。
某患者因急性胰腺炎拟行急诊手术,下列护理措施不妥的是()。
背景资料某住宅楼工程,场地占地面积约10000m2,建筑面积约14000m2。地下2层,地上16层,层高2.8m,檐口高47m,结构设计为筏板基础,剪力墙结构。施工总承包单位为外地企业,在本项目所在地设有分公司。本工程项目经理组织编制了项目施工组织设计
凡是违反道德的行为,都是违法行为。()
有如下两个类定义:classXX{private:doublex1;protected:doublex2;public:doublex3;};
最新回复
(
0
)