色色新妈妈电影

産品目錄 CATALOG

技術文章 當前位置：首頁 > 技術文章 > 詳細內容

燃料熱值發熱量

发布时间：2011-10-29 点击次数：1322次

燃料熱值也叫燃料發熱量，是指單位質量（指固體或液體）或單位體積（指氣體）的燃料完全燃燒，燃燒産物冷卻到燃燒前的溫度（一般爲環境溫度）時所釋放出來的熱量。
      固體或液體發熱量的單位是千卡/千克（kcal/kg）、千焦耳/千克（KJ/kg）或兆卡/千克（Mcal/kg）、兆焦爾/千克（MJ/kg）；氣體燃料的發熱量單位是千卡/標准立方米（kcal/Nm3）、千焦耳／標准立方米（KJ/Nm3）或兆卡/標准立方米（Mcal/Nm3）、兆焦爾/標准立方米（MJ/Nm3）。燃料熱值有高位熱值與低位熱值兩種。
高位熱值是指燃料在完全燃烧时释放出来的全部热量，即在燃烧生成物中的水蒸汽凝结成水时的发热量，也称毛热。
    低位熱值是指燃料完全燃烧，其燃烧产物中的水蒸汽以气态存在时的发热量，也称净热。
高位熱值與低位熱值的区别，在于燃料燃烧产物中的水呈液态还是气态，水呈液态是高位熱值，水呈气态是低位熱值。低位熱值等于从高     位熱值中扣除水蒸汽的凝结热。
      燃料大都用于燃烧，各种炉窑的排烟温度均超过水蒸汽的凝结温度，不可能使水蒸气的凝结热释放出来，所以在能源利用中一般都以燃料的应用的低位发热量作为计算基础。各国的选择不同，日本、北美各国均习惯用高位熱值，而我国、前苏联、德国和经济合作與发展组织是按低位熱值换算的，有的国家两种熱值都采用。

經營産品

聯系我們

地址：金山工業園區淇山南路85號
電話：0392-2643677
郵箱：htyq@hbhtyq.com
傳真：0392-3253111
郵編：458030

鶴壁市華通分析儀器有限公司管理後台 GoogleSitemap

豫公网安备 41061102000020号

備案號：豫ICP備08104875號-4

聯系人：龍經理
13939283560

The great ship steamed onward, day after day and night after night. There was no storm to break the monotony; no sail showed itself on the horizon; no one left the steamer, and no new-comers appeared; nobody saw fit to quarrel with any one else; and there was not a passenger who showed a disposition to quarrel with his surroundings. Stories were told and songs were sung, to while away the time; and, finally, on the twentieth day, the captain announced that they were approaching land, and the voyage would soon be over. "I could go on with a long account of the tortures in China, but they are not very pleasant reading, and, besides, some of them are too horrible for belief. I will stop with the torture known as 'the hot-water snake,' which consists of a coil of thin tubing of tin or pewter in the form of a serpent. One of these coils is twisted around each arm of the victim, and another around his body, in such a way that the head of the snake is higher than any other part. Then they pour boiling water into the mouth of the snake, and the flesh of the prisoner is burned and scalded in the most terrible manner. This punishment is said to be used rarely, and only[Pg 374] on persons accused of crimes against the government. It is too horrible to be popular, even among the most cold-blooded people in the world. "No, Lieutenant, she nearly cried. Oh, I wish we were on some dangerous errand to-night, instead of just camp and bed!" One glance at the dim mirror and Leona Lalage flew down the corridor. The music of the band was like the sound of mocking demons in her ears. As she flew up the stairs she could see the blank windows of the Corner House staring dreadfully in. Then she locked the door behind her and flung herself headlong down on the bed. . . . Surely they were a long time getting that hot water. In such a case as this hurry was everything. Bruce crept from the room and looked over the banisters. The whole place was in darkness! "Just a moment," Leona said eagerly. "Suppose I deny that. How are you going to prove that I did so?" It was weary work sitting there and pretending to drink, but patience has its reward at last. Gradually the shy swindlers became accustomed to the seedy shop assistant, who even went out of his way to give them hints as to credulous firms. It seemed to Prout that he knew all the gang at last save one. 162 "I told you to go," she repeated, raising her brows. "Come here, Shorty, you dirty little rascal," said the Deacon, assuming a severely maternal tone, at which Si laughed feebly but cheerily, "and let me wash your face and comb your hair." a-courtin', as you will know if ever you was a widower, and he "Could the gunner knock a man's head off, or one of his legs, just as he pleased?" "But—" "You can't go by yourself—he wudn't like it." "Not if we stick to the farm. Did you notice that ring on his little finger?" "Can't you mortgage?" HoME 色色新妈妈电影 ENTER NUMBET 0010cbmd3il0.com.cn
dezico.com.cn
digiseen.org.cn
edusureyhui51.cn
hydranautics.com.cn
irana2z.org.cn
jovoj.com.cn
loyg3wj9.com.cn
rd-test.com.cn
www.tzasp.com.cn