Question

A single-effect thermal vapor-compression system is designed at the following operating conditions .Boiling temperature, of 75 °C Compression ratio, of 2.5 Motive steam pressure, of 750 kPa. .Brine reject concentration, of 70 000 ppm .Intake seawater salinity of 42 000 ppm .Intake seawater temperature, of 25 °C .System capacity, of 1 kg/s .Feed seawater temperature, of 70 °C Condenser efficiency, of 0.9. Consider the losses associated with the demister equal to 340 Pa/m Find: a. The vapor temperature, T, and pressure, Pv. b. The steam temperature,Is c. The motive steam mass flow rate, Mm d. The evaporator and the condenser areas e. the performance ratio, PR.

Assume anything to solve the problem

Answer 1

T-tse Boilay "temperature Compretsion ratio Motive skam presus 7o kpa Brine reject Tntake dawatey alinit-12000 Tntake Sea watr Given÷ Cone Capacity , Md Seah 10000 BPE Boiling Point Elevation 2 0.08 QSy21十0.000 1882(75)ナ0.00000402(75) )(-0:000 162s+ 00000 102(a 0.000 000只(打*)[1/10, 0001522- 0.000002(75)一0.00000002 ( 21구) BRE o. 903

338iS 一0-1155284(0.01) (子40774213-15-388'IS) t 0 084563 s 0-o)(TH01 1315 -3e/s) -0.0043993 [0.01)(740$4 t273.ts-331.4) t0002520658[10.01)(구3.ol-t273-1S-328-15] -0.0005218689 [10.0)(74,097 273-15-32LO The Vapour presun past the domísto1々 %, Palt the demister . Tev dg assumed egļual tho Satu ation temper applied none d3-ナhe equality otte vapou condensation应morature,T n the conden vapo tampene ture in the evaporalo Ty.

and he erbaived preue value te cal culate presrus FJYQ. 67 7 6-2892- h 92 75 O2D 73.15 el evapprator t 0.AS6SI xto2 (ารู้

l0 296 Pm PCF 1.04 2y 0.0/s 7S O 37. 0.96 in evapora lor 98 3.6 J

Colving abovéng equation we londi uen balanlu the (3.74) 170-as , 0 , 9 ( 1-0 .3子)(03934) Q 354.1 khj n tha lendanden load the Value of he u 'identical te λν.This "a because ethaledi amic lotes cau ypreu dop and dirin tor denuation 2354.1 (Q.G)(97.6-チ5) VzE1-1) z 39-8 九--de MD60 25) チ0-25 16-25 01-s 73.00

sina the disk lat yor rah u set at ls 0.675- ven