These devices are added into plant designs during pinch analysis. One of these devices is the feed-forward element in a popular recuperation scheme that places it immediately before and after a compressor. Calculations involving these devices use log-means, rather than arithmetic (10[1])or geometric means, between their inputs and outputs to estimate the average driving force. (10[1])The effectiveness of these devices asymptotically approaches one as the N·T·U, (10[1])or number of transfer units, increases. (-5[1])Corrugated plates (10[1])are used (10[1])in these devices to prevent fouling and maximize (-5[1])the (-5[1])Nusselt (“NOO-sult”) number. (10[1]-5[1])These devices are equipped with fins in the (-5[1])shell-and-tube configuration to increase surface area in the equation “Q (-5[1])equals U A (-5[1])delta T.” (-5[1])A distillation column’s reboiler is one of these devices that uses a counter·current (-5[1])flow of steam. (10[1]-5[1])For 10 points, name these devices that transfer thermal energy between fluids (10[1])in pipes. (10[1])■END■ (10[1]0[8])