(3.19) 72,500 lb/h of crude oil are to be heated from 250F to 320F by cooling...

 

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(3.19) 72,500 lb/h of crude oil are to be heated from 250°F to 320°F by cooling a lube oil from 450°F to 340°F. Physical properties of the two streams may be assumed constant at the following values: Property Crude oil Lube oil Cp (Btu/lbm - F) 0.59 k (Btu/h ft. °F) 0.62 0.073 0,067 u (cp) p (lbm/ft) 0.83 1.5 47.4 48.7 It is proposed to use a carbon steel heat exchanger having the following configuration: Tubes: 1.0 in. OD, 14 BWG, 24 ft long Number of tubes: 314 Туре: АES Shell ID: 29 in. Baffle type: segmental Number of tube passes: 6 Baffle cut: 20% Number of baffles: 30 Sealing strips: one pair per 10 tube rows Tube pitch: 1.25 in. (square) The crude oil will flow in the tubes, and published fouling factors for oil refinery streams should be used. Is the proposed unit thermally suitable for this service? (3.19) 72,500 lb/h of crude oil are to be heated from 250°F to 320°F by cooling a lube oil from 450°F to 340°F. Physical properties of the two streams may be assumed constant at the following values: Property Crude oil Lube oil Cp (Btu/lbm - F) 0.59 k (Btu/h ft. °F) 0.62 0.073 0,067 u (cp) p (lbm/ft) 0.83 1.5 47.4 48.7 It is proposed to use a carbon steel heat exchanger having the following configuration: Tubes: 1.0 in. OD, 14 BWG, 24 ft long Number of tubes: 314 Туре: АES Shell ID: 29 in. Baffle type: segmental Number of tube passes: 6 Baffle cut: 20% Number of baffles: 30 Sealing strips: one pair per 10 tube rows Tube pitch: 1.25 in. (square) The crude oil will flow in the tubes, and published fouling factors for oil refinery streams should be used. Is the proposed unit thermally suitable for this service?