Q Process Technology Equipment Ch. 11 Test Vocabulary a. Aftercooler b. Backwashing c. Baffles d. British thermal unit (BTU) e. Calorie f. Chiller g. Conduction. h. Convection i. Countercurrent flow. j. Crossflow k. Economizer l. Exchanger head m. Fin Fan coolers n. Fouling o. Heat p. Heat exchangers q. Heat transfer r. Hybrid flow s. Interchanger t. Intercooler u. Laminar flow v. Parallel flow w. Preheater x. Radiation y. Reboiler z. Reynolds number A. Shell B. Temperature C. Tube bundle D. Tube sheet E. Turbulent flow F. Vaporizer G. Condenser 1.__ - a heat exchanger, located after the final discharge stage of a compressor 2.__ a procedure in which the direction of flow through the exchanger is reversed to remove solids. 3.__metal plates that are placed inside a vessel or tank and are used to alter flow,facilitate mixing, or cause turbulent flow. 4.__-a measure of energy in the English (Imperial standard system; the heat required to raise the temperature of 1 pound of water 1 degree Fahrenheit at sea level 5.__ the amount of heat energy required to raise the temperature of 1 gram of water by 1 degree Celsius at sea level 6.__devices used to cool a fluid to a temperature below ambient temperature. 7.__an exchanger used to convert a substance from a vapor to a liquid. 8.__the transfer of heat from one substance to another by direct contact. 9.__the transfer of heat as a result of fluid movement. Countercurrent flow-flow movement that occurs when two fluids are moving in opposite directions. 10.__movement hat when two streams of fluid flow perpendicular (at a 90-degree angle) to each other. 11.__pe of heat exchanger that preheats a fluid with waste heat, such as boiler feedwater being preheated with flue gases exiting a boile. 12.on the end of a heat exchanger that directs the flow of fluids into and out of the tubes; also called a channel head. 13.__ coolers consisting of b__cated anks of finned tubes ,connected by an tubesheet, that transfer heat from process streams flowing through the tube banks to the atmosphere. 14.__umulation of deposits that build up on the surfaces of processing equipment 15.__easure of the transmission of energy from one object to another as a result of the temperature difference between them, 16.__ices that are used to transfer (exchange) heat from one substance to another, usually without the two substances physically contacting each other 17._transmission of energy from one object to another as a result of a temperature difference between the two objects 18__mvement of fluid in a heat exchanger that is any combination of counterflow, parallel flow, and crossflow 19.__process-to-process heat exchanger that uses hot process fluids on the tube side and cooler process fluids on the shell side. Also known as a cross exchanger. 20.__at exchanger used between the stages of a compressor to cool the gas and remove any liquid before it reaches the next stage 21.__also called streamline flow 22.__at exchanger that adds heat to a substance prior to a process operation. 23.__ transfer of heat through electromagnetic waves 24.__ubular heat exchanger, usually located at the bottom of a distillation column or stripper, that is used to supply the necessary column heat 25.__umeric designation used in fluid mechanics to indicate whether a fluid flow in a particular situation will be laminar (smooth) or turbulent. 26.__outer casing, or external covering, of a heat exchanger. 27.__asure of the thermal energy of a substance (e.g. the hotness' or coldness') that can be determined using a thermometer. 28.__oup of fixed, parallel tubes through which process fluids are circulated, 29.__rmed metal plate with drilled holes that allow process fluids to enter the tube bundle 30.__ement of fluids that occurs when the Reynolds number is high, characterized by irregular flow patterns and high velocities 31.__vice that converts a liquid into a vapor Knowledge 32. Heat exchangers are used to transfer heat between: a. separation equipment b. hot and cold streams c. chemical reactions d. temperature and pressure 33. (True or False) One BTU is equivalent to 252 calories. 34. Which of the following terms describes when the tube side stream and the shell side stream flow in opposite directions? a. Crossflow b. Parallel flow C. Turbulent flow d. Countercurrent flow 35. Select the components that are found in a heat exchanger. (Select all that apply.) a. Channel cover b. Baffles/divider c. Expansion joint d. Tube sheet 36. A__________is a part of a heat exchanger that is bolted to the outside end of the channel to retain exchanger fluid and provide access for cleaning. a. tube sheet b. channel cover c. tie rod d. baffle 37. Which of the following pieces of equipment is used to convert a vapor to a liquid? a. Preheater b. Reboiler C. Chiller d. Condenser 38. Which of the following is NOT a common potential problem in heat exchangers? a. Chemical balance b. Excessive chest pressure c. Fouling, erosion, and corrosion d. Vapor-locked conditions 39. When should breathing protection be used with heat exchangers? a. During normal operations b. During abnormal situations c. When toxic gases might be present d. At all times 40. (True or False) Thermal shock and overheating of fouled tubes can result in ruptured tubes.