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To avoid any accident a boil-off gas compressor with 0.2% volume full tank capacity per day...

Question:

To avoid any accident a boil-off gas compressor with 0.2% volume full tank capacity per day discharge is installed in a plant
To avoid any accident a boil-off gas compressor with 0.2% volume full tank capacity per day discharge is installed in a plant. The detail design of the storage tank is as below: Tank Diameter 15 m Tank Height - 15 m Ceiling (Root) - black body at Tree Liquid CH4 surface - black body at TS Side wall - gray, diffuse (03-06) at T-TRT Max. Liquid depth Lmax-10 m Tror-55°C 2 a) For this assembly, find the net radiative transfer to the liquid in kW, for different values of Liquid height (5, 6, 7, ..., 10 m). b) Find if the capacity of boil-off gas compressor is sufficient to condense the flow rate of evaporated Methane? LV Thermophysical properties of Methane Critical Temperature, T-190.5 KP 4,6 MPa T-113.15 KPI atm. K Co k/kg, pkg/m) Ns/m?) KW/m.K] Pr (Prandt number) Liquid at latm, Tsat. 3 349 422.63 1.17 x 10 0.1862 I 2.098 a lflatent heat of vaporization) 511 Gas at latm, Tat. 2260 1.75 4.20 X 10* 0.0132 0.789 h

Answers

solution: Given Tsat = -160°C. Palatm - Tez 190.5t, Pe 24.6 MPa Assuming no shield the heat transfer - Qw = FR GA (T,_T24)2 30 (Qw) without shield - 127434 €61.7175/5 from Imax to Imin there will be (lmax-Imin) : 30m additional gap .Qw: 60-707 2.0

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