Reconsider Prob. 11–59E. Using EES (or other) software, investigate the effect of the condensing steam temperature on the rate of heat transfer, the rate of condensation of steam, and the mass flow rate of cold water. Let the steam temperature vary from 80°F to 120°F. Plot the rate of heat transfer, the condensation rate of steam, and the mass flow rate of cold water as a function of steam temperature, and discuss the results.

Data from problem 59

Steam is to be condensed on the shell side of a 1-shell-pass and 8-tube-passes condenser, with 50 tubes in each pass at 90°F (hfg = 1043 Btu/lbm). Cooling water (cp = 1.0 Btu/lbm?°F) enters the tubes at 608F and leaves at 73°F. The tubes are thin walled and have a diameter of 3/4 in and length of 5 ft per pass. If the overall heat transfer coefficient is 600 Btu/h?ft² · °F, determine

(a) The rate of heat transfer,

(b) The rate of condensation of steam,

(c) The mass flow rate of cold water.