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 11.68P
To determine
The equation
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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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- 3. A 2-shell 4 tube pass HE will be used to cool a hot fluid from 400oC to 200oC using a cooling water available at 80oC and heated at 180oC. Calculate the total heat transferred if the tubes are 50mm med wt. steel, 5 m long per pass. Assume hi = 200W/m2K and ho = 4500W/m2Karrow_forwardPlease dont take solution from chegg.My values are different. Thank you.arrow_forwardWhere is this equation derrived from?arrow_forward
- The thermal conductivity of aluminum is higher than that of concrete material (one of most popular building materials). Select one: O True O False An example of convective heat transfer is freezing of the ground during the winter. Select one: O True O False Fouling on heat exchanger tubes has no effect on heat exchanger's performances. Select one: O True O False For good winter jackets, they should be made of light-weight materials, filled with air, that have very low conductivity. Select one: O True O Falsearrow_forwardAnswer the following problem:arrow_forwardHeat transfer problem.In a counter flow heat exchanger, water, flow rate 0.05kg/s, enters at 400K and leaves at 330k. The water is cooled by air that enters at 0.75 kg/s and 300K. The overall heat coefficient is 200 W/m2K. Assume air outlet is 320k only for evaluating the properties of the air. You can use saturated liquid water properties (a).what is the air outlet temperature.(b)log mean temperature difference (c)required heat transfer surface area.arrow_forward
- Find the required area A for the heat transfer neglecting any convective heat transfer in the flows.A large condenser (heat exchanger) in a power plant must transfer a total of 100 MW from steam running in a pipe to sea water being pumped through the heat exchanger. Assume the wall separating the steam and seawater is 5 mm of steel, conductivity 16 W/m K and that a maximum of 3.5°C difference between the two fluids is allowed in the design. Find the required minimum area for the heat transfer neglecting any convective heat transfer in the flows.arrow_forwarda buildiug has the following calculated cooling loads: RSH gain 300 kW RLH gain = 110 kW The space is maintained at the following conditions Room DBT 25°C, Room RH = 55% Outdoor is at 40°C and RH 50%. And 10% by mass of air supplied to the buildings is out door. If the air supplied to the space is not to be at a temperature lower than 18°C. Find (i) Miu amount of air supplied to space in m/sec. (ii) Mass flow rates of return air, exhaust air and out door air (i) Capacity, BPFand sensible heat factor of cooling coil. Given: Condition DBT RH Sp. Humidity Enthalpy °C g.w.v./kg d.a. kJ/kg d.a. outside 40 50 23.6. 100 inside 25 55 10.6 52.5 supply Specitic valume of air supply point 0.836 m³/kg, coil ADP=9°C. 18 41.2arrow_forwardProject 5: Automobile radiator, condenser, evaporator, air preheater, and cooling tower are common types of direct heat exchangers that also called recuperators. Recuperators may have different types based on the flow arrangement of the hot and cold fluid. Your role in a company that manufactures recuperators heat exchanger is to design a counter-flow recuperator (see Figure.6) that is used in heating, ventilation, and air conditioning (HVAC). Section.1: − Exhaust pipe is 88 ?? diameter. − Exhaust gas enters at 500??. − Water jacket is used and enters at 8??. − The surface heat coefficient of water and gas are ℎ????? = 300 ?/(?2.?) and ℎ??? = 1500 ?/(?2.?) , respectively. − Assume conduction transfer through wall is negligible. − The gas heat specific capacity is ?? is 1130 ?/(??.?). − The water heat specific capacity is ?? is 4190 ?/(??.?). − The flow rate of gas and water are 320 and 1500 ??/h, respectively. − The gas must be cooled to 100??. You need to design a counter-flow…arrow_forward
- STEAM ENGINE PROBLEM. Please solve carefully/ellaborately and include the untis in every step, show diagram and write your solutions clearly and must be readable if your solution is in written form. Your work will be appreaciated much. Thank You. A steam engine boiler is maintained at 250°C and water is converted into steam. This steam is used to do work and heat is ejected to the surrounding air at temperature 300K. Calculate the maximum efficiency it can have in percent?arrow_forwardAn evaporative cooling system of 90% saturation efficiency is used for supplying cool air to a greenhouse. The allowable inside temperature is 32 C, when the cooling load is 360kW (50% sensible heat) at outdoor air of 46'Cdb and 26'Cwb. Find the supply air conditions and the air and water flow requirements for the system.arrow_forward2.1.What advantage does the effectiveness-NTU method have over the LMTD method?arrow_forward
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