Fundamentals of Heat and Mass Transfer
7th Edition
ISBN: 9780470501979
Author: Frank P. Incropera, David P. DeWitt, Theodore L. Bergman, Adrienne S. Lavine
Publisher: Wiley, John & Sons, Incorporated
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Chapter 11, Problem 11.55P
To determine
The mass flow rate for exhaust gases.
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A cross flow heat exchanger (Both fluids are mixed) Is used to heat oil in the tubes (c=1.8 kj/kg · ◦c) from 15◦c to 85◦c with a mass flow of 0.73kg/sec. blowing across the outside of the tubes is steam that enters at 130◦c and leaves at 110◦c with a mass flow of 5.3 kg/sec. The overall heat-transfer coefficient is 270 w/m2◦c and c for steam is 1.96kj/kg◦c. The surface area of the heat exchanger is 12 m2. Calculate effectiveness of this heat exchanger. (Note: Select suitable formula form formula sheet)
In an heat exchanger of parallel flow type, water enters at 60°C and leaves at 80°C while oil of specific gravity 0.8 enters at 250°C and leaves at 100°C. The specific heat of oil is 2.5 kJ/kg K and surrounding temperature is 300 K. Determine the loss in availability on the basis of one kg of oil flow per second.
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A thin-walled double-pipe counter-flow heat exchanger is used to cool oil (C, = 2.20 kJ/kg.°C) from 150 to 40°C at a rate of 2 kg/s by water (c, = 4.18 kJ/kg.°C) that enters at 22°C at a rate of 1.5 kg/s. Determine the rate of heat transfer in the heat exchanger and the exit temperature of water.
Chapter 11 Solutions
Fundamentals of Heat and Mass Transfer
Ch. 11 - In a fire-tube boiler, hot products of combustion...Ch. 11 - A shell-and-tube heat exchanger is to heat an...Ch. 11 - A steel tube (k=50W/mK) of inner and outer...Ch. 11 - A heat recovery device involves transferring...Ch. 11 - A novel design for a condenser consists of a tube...Ch. 11 - The condenser of a steam power plant...Ch. 11 - Thin-walled aluminum tubes of diameter D = 10mmare...Ch. 11 - A tinned-tube, cross-how heat exchanger is to use...Ch. 11 - Water at a rate of 45,500kg/h is heated from 80...Ch. 11 - A novel heat exchanger concept consists of a...
Ch. 11 - Prob. 11.12PCh. 11 - A process fluid having a specific heat of...Ch. 11 - A shell-and-tube exchanger (two shells, four tube...Ch. 11 - Consider the heat exchanger of Problem 11.14....Ch. 11 - The hot and cold inlet temperatures to a...Ch. 11 - A concentric tube heat exchanger of length L = 2 m...Ch. 11 - A counterflow, concentric tube heat exchanger is...Ch. 11 - Consider a concentric tube heat exchanger with an...Ch. 11 - A shell-and-tube heat exchanger must be designed...Ch. 11 - A concentric tube heat exchanger for cooling...Ch. 11 - A counterflow, concentric tube heat exchanger used...Ch. 11 - An automobile radiator may be viewed as a...Ch. 11 - Hot air for a large-scale drying operation is to...Ch. 11 - In a dairy operation, milk at a flow rate of 250...Ch. 11 - The compartment heater of an automobile...Ch. 11 - A counterflow, twin-tube heat exchanger is made...Ch. 11 - Consider a coupled shell-in-tube heat exchange...Ch. 11 - For health reasons, public spaces require the...Ch. 11 - A shell-and-tube heat exchanger (1 shell pass, 2...Ch. 11 - Saturated water vapor leaves a steam turbine at a...Ch. 11 - The human brain is especially sensitive to...Ch. 11 - Prob. 11.47PCh. 11 - A plate-tin heat exchanger is used to condense a...Ch. 11 - In a supercomputer, signal propagation delays...Ch. 11 - Untapped geothermal sites in the United States...Ch. 11 - A shell-and-tube heat exchanger consists of 135...Ch. 11 - An ocean thermal energy conversion system is...Ch. 11 - Prob. 11.55PCh. 11 - Prob. 11.56PCh. 11 - The chief engineer at a university that is...Ch. 11 - A shell-and-tube heat exchanger with one shell...Ch. 11 - Prob. 11.59PCh. 11 - Prob. 11.60PCh. 11 - Prob. 11.61PCh. 11 - Prob. 11.62PCh. 11 - A recuperator is a heat exchanger that heats air...Ch. 11 - Prob. 11.64PCh. 11 - Prob. 11.65PCh. 11 - A cross-flow heat exchanger consists of a bundle...Ch. 11 - Exhaust gas from a furnace is used to preheat the...Ch. 11 - Prob. 11.68PCh. 11 - A liquefied natural gas (LNG) regasification...Ch. 11 - Prob. 11.70PCh. 11 - A shell-and-tube heat exchanger consisting of...Ch. 11 - Prob. 11.73PCh. 11 - The power needed to overcome wind and friction...Ch. 11 - Prob. 11.75PCh. 11 - Consider a Rankine cycle with saturated steam...Ch. 11 - Consider the Rankine cycle of Problem 11.77,...Ch. 11 - Prob. 11.79PCh. 11 - Prob. 11.80PCh. 11 - Hot exhaust gases are used in a...Ch. 11 - Prob. 11.84PCh. 11 - Prob. 11.90PCh. 11 - Prob. 11S.1PCh. 11 - Prob. 11S.2PCh. 11 - Prob. 11S.3PCh. 11 - Solve Problem 11.15 using the LMTD method.Ch. 11 - Prob. 11S.5PCh. 11 - Prob. 11S.6PCh. 11 - Prob. 11S.8PCh. 11 - Prob. 11S.10PCh. 11 - Prob. 11S.11PCh. 11 - A cooling coil consists of a bank of aluminum...Ch. 11 - Prob. 11S.17P
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- The stack gas from a chemical operation contains noxious vapors that must be condensed by lowering its temperature from 315C to 35C. The gas flow rate is 0.70 m^3/s. Water is available at 10C at 1.26kg/s. A counterflow heat exchanger will be used with a water flowing through the tubes. The gas has a specific heat of 1.10 kJ/kg-K and a gas constant of 0.26 kJ/kg-K. What is the rate of heat lost by the gas in KJ?arrow_forwardThe stack gas from a chemical operation contains noxious vapors that must be condensed by lowering its temperature from 315C to 35C. The gas flow rate is 0.70 m^3/s. Water is available at 10C at 1.26kg/s. A counterflow heat exchanger will be used with a water flowing through the tubes. The gas has a specific heat of 1.10 kJ/kg-K and a gas constant of 0.26 kJ/kg-K. What is the rate of heat lost by the gas? answ. 186.956 kJ 196.895 kJ 168.965 kJ 169.856 kJarrow_forward100 kg / h tomato paste sterilized in the heat treatment section of an aseptic packaging unit is packaged by cooling in a cooler consisting of a tubular heat exchanger operating according to the reverse flow principle. Sterile hot tomato paste enters the cooler at 93 ° C and leaves the cooler cooled to 25 ° C . Cooling water enters the system at 20 ° C and leaves the heat exchanger by heating at 15 ° C. Calculate the cold water requirement of the coolant as the specific temperature of the tomato paste is 2.940 kJ / kg ° C and the specific temperature of the water is 4.18 kJ / kg ° C.arrow_forward
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How Shell and Tube Heat Exchangers Work (Engineering); Author: saVRee;https://www.youtube.com/watch?v=OyQ3SaU4KKU;License: Standard Youtube License