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
57
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°Fahren-heit. 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/E6Ld777K
本试题收录于:
职称英语理工类B级题库职称英语分类
0
职称英语理工类B级
职称英语
相关试题推荐
CentersoftheGreatEuropeanCitiesThecentersofthegreatcitiesofEuropearemeetingplacesbytradition.Peoplegatherth
A.QuickerrecoveryfromillnessB.AlongerlifeforoptimistsC.RelationshipbetweengoodhealthandoptimismD.Apositivew
OptimistsReallyDoLiveLonger,SayScientists1.ForthephilosopherArthurSchopenhaueroptimismwasfundamentallywrongb
SpareaKidney?Itisnolongerunusualforaspouseorrelativetodonateakidneyt0alovedone,butthenumberofAmer
DebateovertheUseofRenewableEnergyAmusableofRockefellerUniversityinNewYork,USsaysthekeyrenewable(可再生的)ene
WhatIsMarket?Thewordmarketisusedinanumberofways.Thereisastockmarketandanautomobilemarket,aretailmark
Thedetailsofthecostumeweretotallyauthentic.
WhoisUncleSam?"UncleSam",ofcourse,standsfortheUnitedStates.Itisthenickname(绰号)ofthecountry.Itishardtobel
Theideawasquitebrilliant.
随机试题
泛点气速是填料吸收塔空塔速度的上限。
根据《期货交易管理条例》的规定,期货交易的收费项目、收费标准和管理办法由中国期货业协会统一制定并公布。()
在中国境内未设立机构、场所的非居民企业从中国境内取得的收入,按全额作为企业所得税应纳税所得额的有()。
安全控制可以从以下哪些方面进行界定,以发挥其特性()。
下列各句中,没有语病且句意明确的一句是()。
按照资本资产定价模型,确定特定证券资产的必要收益率所考虑的因素有()。
下列关于我国地理常识的说法错误的是:
班干部都参加了奥运志愿服务,小赵也参加了奥运志愿服务,所以,小赵是班干部。以下哪项中的推理方式与上文中的最相似?
この近くに映画館もあればレストランもあります。
Speakinginpublicismostpeople’sleastfavoritething.Thereasonisthatwe’reallafraidofmakingfoolsofourselves.The
最新回复
(
0
)