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The students in the Thermodynamics class have recently learned about PVT properties of

water/steam. Now, they felt that they are ready for the next step: to learn the concept of mass

and energy balance first law of thermodynamics!. They asled their instructor to give them

one easy problem to solve. "ere#s he problem they receiver: $aurated steam having %uality of

&.'( '() mass of saturated vapor! is acaiable at pressure of * bar and the flow rate of +g/sec. - superheated steam is also avaiable at * bar and && o. "ow do you combine the

two streams to produce a saturated steam stream at * bar0 $tate yor assumptios1

Diketahui:

P steam 2 * bar &,* 3Pa!

T superheated steam 2 && o

4uality saturated steam 2 &.'( atau '()

5low rate saturated steam 2 + g/deti

Ditanya:

5low rate superheated steam agar steam campuran merupaan saturated steam

Asumsi:

$istem adiabati 62 &!

$teady state

7p dan 7 2 &

" 2 atau "+ 2 "

T 2 + deti

Jawab:

8arena secara eseluruhan pada sistem tida ter9adi usaha dan perpindahan alor, maa

" 2 &. erarti entalpi sisem sebelum dan sesudah pencampuran aan sama besar.

HAwal

=HAkhir

8arena pada awalnya awal merupaan campuran saturated steam dan superheated steam dan

" ahir hanya membuat

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Tabel +. $aturated $team table

erdasaran tabel diatas, penulis mendapatan nilai hf dan hg dari seam, yaitu ;/g

dan =?=,;? >/g

Tabel . $uperheated steam table pada teanan * bar

Two g of a two@phase, li%uid@vapor mixture of carbon dioxide A! exists at ?&& in a &.&*

m

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li%uid and saturated vapor A at ?&& are &.(';x+&@< m

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