问题
名词解释
给水回热
答案
参考答案：
利用已在汽机中作过功的蒸汽，通过给水回热加热器将回热蒸汽冷却放热加热给水，以减少液态区低温工质的吸热，提高循环的吸热平均温度。由于采用回热，增加了抽汽量，所以汽耗率提高；但同时采用回热提高了给水出口温度，降低了锅炉中的吸热量，所以锅炉效率提高，热经济性提高。
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给水回热
参考答案：
利用已在汽机中作过功的蒸汽，通过给水回热加热器将回热蒸汽冷却放热加热给水，以减少液态区低温工质的吸热，提高循环的吸热平均温度。由于采用回热，增加了抽汽量，所以汽耗率提高；但同时采用回热提高了给水出口温度，降低了锅炉中的吸热量，所以锅炉效率提高，热经济性提高。
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2. Jones would move to another city so she put an _______ in the newspaper to sell her house. 3. At college I majored in (主修) ________ literature. 4. What bad luck! My car got ________ in the mud on my way to the meeting. 5. She is an ________ woman and lots of men chase after her. 6. When he was singing the sweet song everyone ________ in time to the music. 7. I will try to do the job to the best of my ________. 8. Jay Chou has lots of ________ among young high school students. 9. Ten years of work in the country ________ the basis of his writing. 10. As the ________ goes, "Practice makes perfect." |