18,000 lb/h of a petroleum fraction are to be cooled from 250F to 150F using cooling water with a range of 85120F. Properties of the petroleum fraction may be assumed constant at the following values: Property Value CP (Btu/lbm F) 0.52 k (Btu/h ft F) 0.074 (cp) 2.75 (lbm/ft3) 51.2 A shell-and-tube heat exchanger with the following configuration is available: Type: AES Tubes: 3/4 in. OD, 16BWG, 20 ft long Shell ID: 15.25 in. Number of tubes: 128 Baffle type: segmental Number of tube passes: 4 Baffle cut: 20% Tube pitch: 1.0 in. (square) Number of baffles: 50 Sealing strips: 1 pair Shell material: carbon steel Tube material: Admirality brass (k = 64 Btu/h ft F) Fouling factors of 0.001 and 0.002 h ft2 F/Btu are required for the cooling water and petroleum fraction, respectively. Is the heat exchanger thermally suitable for this service? (3.18) For the heat exchanger of Problem 3.17, calculate the outlet temperatures of the two streams that will be attained when the exchanger is clean.