Question

A plate and frame HX has19 stainless steel (316SS) plates.9 m tall, 2 mm thick and .7 m wide which are spaced 5 mm apart. It is used to cool water at .012 m3/s,and inlet temperature of 35 C. The cooling medium s cold water which enters the HX at 7 C with the volumetric flow rate of 0.02 m3/s. What outlet temperature can be expected when the exchanger is new?

Answer 1

0.012 (35-T) = 0.02 (1-7) Given: A plate and frame Hy has 19 stainless steel plates (31655) plotes. Im tall, 2mm thick and 0.7 m wide which spaced 5mm thick apart. used to cool water at anc mie 0.012 m 18 tfw and inlet temperature, (Tali = 35€ cooling mediums mic 0.02 m3/B x fw inlet temp. (Ic) i=7°C cold water or flow sarte is new outlet temperature can be expected when the exchanger Assume porralel flow heat exchanger hence for movimeim heat toonsfer ( because heat exchanger is new) outlet temperature of both fluid to be some from energy bolante heat given by hot fluid = goin by 3sch sinh T cold fluid ma celow): -1) = sikselt laboy 0.012 XSW (35-1) = 0.024 Sw (T-7) la.sc 0.012.35 +0.0247 0.012 + 0.02 Tout = 17.5°C Hence outlet temperature of fluid to be