承德石油高等专科学校学报
承德石油高等專科學校學報
승덕석유고등전과학교학보
JOURNAL OF CHENGDE PETROLEUM COLLEGE
2011年
3期
32-35
,共4页
蒸汽动力循环%%分析%传递
蒸汽動力循環%%分析%傳遞
증기동력순배%%분석%전체
the Steam Power Cycle%exergy%exergy analysis%exergy transfer
能量在传递和转换过程中其量是守恒的,而的量不守恒,则其必有独特的传递和转换规律。依据传递原理,建立蒸汽动力循环及装置的传递模型,提出并定义装置设备的流密度、流密度降低速率与流密度降低系数等评价分析准则及其计算式。在此基础上,以某电厂技改项目为对象,对技改后系统中能质行为做了传递计算。结果表明,利用工业汽轮机驱动给水泵可以使蒸汽动力循环的尽可能地得到利用,有利于热电厂的能量转换和电厂经济性的提高,从而为改进机组及指导装置运行提出了可行的节能方案。
能量在傳遞和轉換過程中其量是守恆的,而的量不守恆,則其必有獨特的傳遞和轉換規律。依據傳遞原理,建立蒸汽動力循環及裝置的傳遞模型,提齣併定義裝置設備的流密度、流密度降低速率與流密度降低繫數等評價分析準則及其計算式。在此基礎上,以某電廠技改項目為對象,對技改後繫統中能質行為做瞭傳遞計算。結果錶明,利用工業汽輪機驅動給水泵可以使蒸汽動力循環的儘可能地得到利用,有利于熱電廠的能量轉換和電廠經濟性的提高,從而為改進機組及指導裝置運行提齣瞭可行的節能方案。
능량재전체화전환과정중기량시수항적,이적량불수항,칙기필유독특적전체화전환규률。의거전체원리,건립증기동력순배급장치적전체모형,제출병정의장치설비적류밀도、류밀도강저속솔여류밀도강저계수등평개분석준칙급기계산식。재차기출상,이모전엄기개항목위대상,대기개후계통중능질행위주료전체계산。결과표명,이용공업기륜궤구동급수빙가이사증기동력순배적진가능지득도이용,유리우열전엄적능량전환화전엄경제성적제고,종이위개진궤조급지도장치운행제출료가행적절능방안。
Energy is conservative in its transfer and conversion process.While exergy is known to be non-conservative,it must have the special law for its transfer and conversion.According to the exergy transfer theory,the paper establish the exergy transfer model of unit and the devices for the Steam Power Cycle system.Some criterions to analyze and evaluate the devices and equipments such as the exergy fluid density,exergy fluid density reduction rate,exergy fluid density digressive rate coefficient are raised and defined.The calculation formulas for each criterion are also presented.Taking the technical transformation project in the power plant for example,the exergy transfer calculation is made.The results show that with reasonable utilization of small industry turbine,the power consumption ratio can be obviously reduced,and the thermal efficiency can be prominently enhanced.Therefore,it can provide the detailed suggestions to improve the design of Steam Power Cycle Device and direct the device operation.