solve all steps Problem 4: A three-effect MED-FF (feed forward) operates at the following conditions. Plant capacity =5kg/s Steam temperature =115C hf,g,sat=2256Kj/kg Intake seawater salinity =XF=42,000mg/L XL=52,000mg/LX1=44,891mg/L Specific heat at constant pressure of seawater =4.18K/kg. C Load of third effect (q)=13.5K

Question

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Problem 4: A three-effect MED-FF (feed forward) operates at the following conditions. Plant capacity

= 5 kg / s

Steam temperature

= 11 5^{\circ} C

h_{f, g, sat} = 2256 Kj / kg

Intake seawater salinity

= X_{F} = 42, 000 mg / L

X_{L} = 52, 000 mg / L X_{1} = 44, 891 mg / L

Specific heat at constant pressure of seawater

= 4.18 K / kg

.

^{\circ} C

Load of third effect

(q) = 13.5 KW / m^{2}

(Fixed for all effects) Intake seawater temperature

= 2 0^{\circ} C

Heat transfer coefficient in effect

1 = 4.5 kW / m^{2} .^{\circ} C

(h_{f, g, 1} = 2266.36 Kj / kg) (h_{f, g, 2} = 2277.00 Kj / kg) (h_{f, g, 3} = 2288.00 Kj / kg)

Heat transfer coefficient in effect

2 = 3.0 KW / m^{2}

. Heat transfer coefficient in effect

3 = 2.5 KW / m^{2} .^{\circ} C

Determine: a) Feed flow rate b)

Δ T_{1}, Δ T_{2}

and

Δ T_{3}

c)

D_{1}

and

D_{2}

(distillate) d)

L_{1}

(concentrate) e)

A_{3}

f)

GOR

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