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Unformatted text preview: 1 bar. Assuming that the approach velocity of the steam is negligible, how fast does the steam exit the nozzle? (5) Your first task as a newly graduated ChemE is to design a boiler to produced saturated steam at 300 C. Because energy costs money, you decide to use waste hot water streams already in the plant to feed the boiler. The two waste liquid streams available (120 kg/hr @ 60 C and 180 kg/hr at 90 C) are mixed and fed to the boiler; steam leaves the boiler through a 5 cm pipe. Answer the following questions and make sure to state your assumptions: a) What is the boiler outlet pressure? b) What is the steam velocity coming out of the boiler? c) If electricity is roughly $0.05 per kW-hr, how much does it cost to operate the boiler per day ?...
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This note was uploaded on 01/05/2010 for the course CHE CH E 10 taught by Professor Gordon during the Fall '09 term at UCSB.
- Fall '09
- Chemical Engineering