作业帮英语翻译In the majority of chemical process heat is either given
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/25 02:36:48
英语翻译
In the majority of chemical process heat is either given out or absorbed,and in a very wide range of chemical plant,fluids must often be either heated or cooled.Thus in furnaces evaporators distillation units,driers,and reaction vessels,one of the major problems is that of transferring heat at the desired rate.Alternatively,it may be necessary to prevent the loss of heat from a hot vessel or steam pipe.The control of the flow of heat in the desired manner forms one of the most important sections of chemical engineering.Provided that a temperature difference exists between two part of a system,heat transfer will take place in one pr more of three different ways.
Conduction.In a solid,the flow of heat by conduction is the result of the transfer vibrational energy from one molecule to another,and in fluids it occurs in addition as a result of the transfer of kinetic energy.Heat transfer by conduction may also arise from the movement of free electrons.This process is particularly important with metals and accounts for their high thermal conductivities.
Convection.Heat transfer by convection is attributable to macroscopic motion of the fluid and therefore is confined to liquids and gases.In natural convection it is causes by differences in density arising from temperature gradients in the system.In forced convection,it is due to eddy currents in a fluid in turbulent motion.
Radiation.All materials radiate thermal energy in the form of electromagnetic waves.When this radiation falls on a second body it may be partially reflected,transmitted,or absorbed .It is only the fraction that is absorbed that appears as heat in the body.
In the majority of chemical process heat is either given out or absorbed,and in a very wide range of chemical plant,fluids must often be either heated or cooled.Thus in furnaces evaporators distillation units,driers,and reaction vessels,one of the major problems is that of transferring heat at the desired rate.Alternatively,it may be necessary to prevent the loss of heat from a hot vessel or steam pipe.The control of the flow of heat in the desired manner forms one of the most important sections of chemical engineering.Provided that a temperature difference exists between two part of a system,heat transfer will take place in one pr more of three different ways.
Conduction.In a solid,the flow of heat by conduction is the result of the transfer vibrational energy from one molecule to another,and in fluids it occurs in addition as a result of the transfer of kinetic energy.Heat transfer by conduction may also arise from the movement of free electrons.This process is particularly important with metals and accounts for their high thermal conductivities.
Convection.Heat transfer by convection is attributable to macroscopic motion of the fluid and therefore is confined to liquids and gases.In natural convection it is causes by differences in density arising from temperature gradients in the system.In forced convection,it is due to eddy currents in a fluid in turbulent motion.
Radiation.All materials radiate thermal energy in the form of electromagnetic waves.When this radiation falls on a second body it may be partially reflected,transmitted,or absorbed .It is only the fraction that is absorbed that appears as heat in the body.
在大多数的化学（反应）过程中,热量不是被释放就是被吸收,并且在大部分的化工厂,流体不是被加热就是被冷却.因此在窑炉蒸发器、干燥器和反应容器中,主要的问题之一就是热的交换要有一个期望的速率.或者说有必要避免热熔器或蒸汽管道中的热损耗,以期望的方式控制热的流动形成了一个最重要的化学工程的分支.由于在系统的两个部分存在有温差,所以热的交换是以三种方式中的一种或多种方式发生的.
热传导,在固体中,有热传导方式进行的热交换是振动能从一个分子向另一个分子转移的结果.再液体中,还有额外的动能转移的结果.由热传导产生的热交换也会由于自由电子的运动而发生,这一过程对金属尤为重要,是其高热导率的重要原因.
对流,热交换中的对流是流体的宏观流动产生的,因此局限于液体和气体.在自然对流中,其原因是由于密度的不同在系统中产生的温度梯度.在强制对流中,它是由于湍动的流体中中的涡流造成的.
辐射,所有的物体都以电磁波的形式辐射热能.当这一辐射落到另一物体时,可能就有一部分被反射、透射或吸收,只有被吸收的那一小部分会在该物体中表现为热（量）.
热传导,在固体中,有热传导方式进行的热交换是振动能从一个分子向另一个分子转移的结果.再液体中,还有额外的动能转移的结果.由热传导产生的热交换也会由于自由电子的运动而发生,这一过程对金属尤为重要,是其高热导率的重要原因.
对流,热交换中的对流是流体的宏观流动产生的,因此局限于液体和气体.在自然对流中,其原因是由于密度的不同在系统中产生的温度梯度.在强制对流中,它是由于湍动的流体中中的涡流造成的.
辐射,所有的物体都以电磁波的形式辐射热能.当这一辐射落到另一物体时,可能就有一部分被反射、透射或吸收,只有被吸收的那一小部分会在该物体中表现为热（量）.
英语翻译Conduction is the process of transferring heat through a
英语翻译The expansion of the chemical process industries on the
英语翻译Advertising is the name given to the process of commerci
a chemical change is a process-------something is changed in
英语翻译However,the vast majority of organizations in Japan have
英语翻译A drug is,in the broadest of terms,a chemical substance
英语翻译The operation of semiconductor chemical sensors is under
in the process,the light energy ____ to heat energy.
英语翻译Jobanalysis is the process of determining the duties of
英语翻译In fact,the process of SLA （第二语言习得）is often characterzed
英语翻译Hello the page,have in process to department of pages,is
英语翻译In the process of implementing the project,the“exception