Text 3 T2 暖通專業(yè)英語課件

1、Unit 1 Thermodynamics and Heat TransferText 3 General Characteristics of Heat TransferQuestionn1. How many modes are there in the heat transfer?n2. Please explain the process of heat transfer ? Whats the significant heat transfer mechanism in the thermal conduction?n3. How did the heat convection oc

2、cur?n4. What s the only type of heat transfer that can travel through vacuum?1. When study the course of the heat transfer carefully，we can find that the heat or thermal energy is transferred from one region to another by three modes: conduction, convection and radiation. lTransfer trnsf: v.轉(zhuǎn)讓；轉(zhuǎn)移 n.

3、 轉(zhuǎn)讓；轉(zhuǎn)移；傳遞；lheat transfer 熱轉(zhuǎn)移 lmass transfer質(zhì)量轉(zhuǎn)移 lenergy transfer 能量轉(zhuǎn)移 返回nThermal m()l ：a. 熱的；熱量的；保熱的 n.保暖衣nthermal power 火力發(fā)電 thermal expansion熱膨脹 thermal expansion熱力分析 返回2. The heat transfer in conduction can be explained as the energy actually traveling from one molecule to another. In solid opaqu

4、e bodies, the significant heat transfer mechanism is thermal conduction. lconduction kndkn傳導(dǎo)；導(dǎo)熱；導(dǎo)電 heat conduction 熱傳導(dǎo) electric conduction 電傳導(dǎo) air conduction 空氣傳導(dǎo) 返回nmolecule mlkjul ： n.分子 water molecule 水分子 small molecule 小分子 high molecule 高分子molecular：a. 分子的molecular speed 分子速度molecular formula 分子

5、式 返回Opaque pek: a.不透明的；難理解的 opaque spot 不透明點 opaque paper 不透明紙 opaque glass 不透明玻璃 Transparent trnspr()nt ：a.透明的；顯而易見的 返回Significant sgnfk()nt：a. 重大的；有效的；有意義的significant difference 顯著差別significant change 改變significant development重大進展；長足發(fā)展 返回nmechanism mknzm：n. 機制；原理，途徑 market mechanism 市場機制 incentive

6、 mechanism 獎勵機制 operating mechanism 操作機構(gòu)返回3. Thermal convection may occur from one location to another by means of current set up in a fluid medium. Thermal convection involves energy transfer by eddy mixing and diffusion of the fluid in addition to conduction.convection knvekn ：n. 對流；傳送natural conv

7、ection 自然對流heat convection 熱對流 返回n current ：a. 現(xiàn)代的，流行的；通用的 ；（水、電、氣）流 electric current 電流 current situation 現(xiàn)狀；目前形勢nfluid flu:d ：a.流體的, 流動的； n.流體，液體 fluid mechanics 流體力學(xué)流體力學(xué) fluid flow 流體流動流體流動 fluid power 流體動力流體動力neddy edi: ：n. 渦流；漩渦渦流；漩渦 an eddy in the waterndiffusion：dfju:n n.擴散;散布; gas diffusion

8、氣體擴散4. For radiant heat transfer, there is a change in energy form; from internal energy at the source to electromagnetic energy for transmission, then back to internal energy at the receiver. Radiation is not dependent of matter as a medium of heat transfer. radiant reidint : a. 輻射的；放熱的輻射的；放熱的; 發(fā)光的發(fā)光的; radiant energy 輻射能radiation：n. 輻射；發(fā)光；放射物 solar radiation 太陽輻射 返回electromagnetic ,lektrmgnetk ：a.電磁的 electromagnetic radiation 電磁輻射電磁輻射electromagnetic field 電磁場電磁場electromagnetic interference電磁干擾電磁干擾 n