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Category > Engineering Posted 03 May 2017 My Price 6.00

Steam enters a diffuser at 20 psia

1. Steam enters a diffuser at 20 psia and 240°F with a velocity of 900 ft/s and exits as saturated vapor at 240°F and 100 ft/s. The exit area of the diffuser is 1 ft2 . Determine (a) the mass flow rate of the steam and (b) the rate of entropy generation during this process. Assume an ambient temperature of 77°F.

2.  Steam enters an adiabatic nozzle at 2 MPa and 350°C with a velocity of 55 m/s and exits at 0.8 MPa and 390 m/s. If the nozzle has an inlet area of 7.5 cm2 , determine (a) the exit temperature and (b) the rate of entropy generation for this process.

 

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Alpha Geek
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Status NEW Posted 03 May 2017 09:05 AM My Price 6.00

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file 1493804710-answer1.docx preview (154 words )
1-----------. S-----------tea-----------m e-----------nte-----------rs -----------a d-----------iff-----------use-----------r a-----------t 2-----------0 p-----------sia----------- an-----------d 2-----------40Â-----------°F -----------wit-----------h a----------- ve-----------loc-----------ity----------- of----------- 90-----------0 f-----------t/s----------- an-----------d e-----------xit-----------s a-----------s s-----------atu-----------rat-----------ed -----------vap-----------or -----------at -----------240-----------°F----------- an-----------d 1-----------00 -----------ft/-----------s. -----------The----------- ex-----------it -----------are-----------a o-----------f t-----------he -----------dif-----------fus-----------er -----------is -----------1 f-----------t2Â----------- . -----------Det-----------erm-----------ine----------- (a-----------) t-----------he -----------mas-----------s f-----------low----------- ra-----------te -----------of -----------the----------- st-----------eam----------- an-----------d (-----------b) -----------the----------- ra-----------te -----------of -----------ent-----------rop-----------y g-----------ene-----------rat-----------ion----------- du-----------rin-----------g t-----------his----------- pr-----------oce-----------ss.----------- As-----------sum-----------e a-----------n a-----------mbi-----------ent----------- te-----------mpe-----------rat-----------ure----------- of----------- 77-----------°F-----------. -----------2.Â-----------  S-----------tea-----------m e-----------nte-----------rs -----------an -----------adi-----------aba-----------tic----------- no-----------zzl-----------e a-----------t 2----------- MP-----------a a-----------nd -----------350-----------°C----------- wi-----------th -----------a v-----------elo-----------cit-----------y o-----------f 5-----------5 m-----------/s -----------and----------- ex-----------its----------- at----------- 0.-----------8 M-----------Pa -----------and-----------
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