.600 Mw Supercritical Units And Parameters Choice

Now,the supercritical pressure technique is an accomplished and devoping thermal power technique in the world, its efficiency has significantly increased comparing the second critical units, already be the coal- clean technique, has double benefit in economy energy and environmental protection. it has 50 years since the first supercritical pressure units in the world , and more than 500 sets has put into production. See from the every country, the supercritical pressure units has occupied more proportion, has the good run experience, the technique is mature and dependable.Our country began to develop the supercritical pressure units,and they usually is 600MW units .In fact, it need to define the parameterses of 600MW supercritical pressure units, and use effect tech-ecomic method, to define the units style accurately This article aids to it.This article takes the method of theories research combining with prctice, collects, sorts large quantity engineering technique information about supercritical pressure units, decused to the parameterses of 600MW supercritical pressure units is 566/566℃ å'Œ 538/566℃.Because it has antinomy between economizing energy and high investment in the supercritical pressure units, this article putting forward with a method, it uses the investment reclaiming time limit as primarily investigating basis, to proceed comprehensive technique economy compare, look for the best project.The calculation formula of the investment recovery time limit synthesize several factorshave affectings to economy analyzing obviously, such as the opposite increment between steel and coal, the Run Hours, the ratio of the comparative increase at investment and the opposite ameliorative in thermal efficiency, the build period of electricity plant, the annul utilization rate, the bank interest rate etc. it can evaluate the influence that each factor to the units parameter completely and accurately, according to project fact.This article takes WeiFang Power Station II project as an example, analyses the influence factor between two kinds of parameterses ,566/566 °Cs and 538/566 °Cs of supercritical pressure units, making the sensitivity analysis with the coal price;Then, analyses the influence factor between two kinds of parameterses 600MW and 670MW of supercritical pressure units, making the sensitivity analysis with the increasing ofe investmen.Through these two calculations case, chose the parameter of supercritical pressure units of WeiFang Power Station II project accurately.In a word, this article introduced the supercritical pressure units completely and thoroughly. But, limited by author's level and the data circumstance controlled, the improper place is unavoidable, pleading each expert give animadversion, correct.