The waste heat of hot exhaust gases from a heat-treating furnace at 500C with a flow...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
The waste heat of hot exhaust gases from a heat-treating furnace at 500°C with a flow rate of 12 m /s is available. The furnace burns propane, whose heating value is 50,330 kJ/kg. The price of the propane is $0.85/kg. The minimum allowable temperature of exhaust gases at the heat recovery equipment is 200°C. The exhaust gases are to be used to preheat combustion air entering the furnace at 27°C. Use the following assumptions: Air-fuel ratio = 20, furnace efficiency = 75 percent, operating hours = 6000 h, U-20 W/m °C. 1. Estimate the fuel and cost savings due to this heat recovery option. 2. 3. Choose an appropriate heat exchanger for this application. Calculate the surface area and the effectiveness of the heat exchanger. The waste heat of hot exhaust gases from a heat-treating furnace at 500°C with a flow rate of 12 m /s is available. The furnace burns propane, whose heating value is 50,330 kJ/kg. The price of the propane is $0.85/kg. The minimum allowable temperature of exhaust gases at the heat recovery equipment is 200°C. The exhaust gases are to be used to preheat combustion air entering the furnace at 27°C. Use the following assumptions: Air-fuel ratio = 20, furnace efficiency = 75 percent, operating hours = 6000 h, U-20 W/m °C. 1. Estimate the fuel and cost savings due to this heat recovery option. 2. 3. Choose an appropriate heat exchanger for this application. Calculate the surface area and the effectiveness of the heat exchanger.
Expert Answer:
Answer rating: 100% (QA)
To estimate the fuel and cost savings due to the heat recovery option we need to calculate the amount of heat recovered and the corresponding fuel sav... View the full answer
Related Book For
Elementary Principles of Chemical Processes
ISBN: 978-1119498759
4th edition
Authors: Richard M. Felder, ? Ronald W. Rousseau, ? Lisa G. Bullard
Posted Date:
Students also viewed these human resource management questions
-
Planning is one of the most important management functions in any business. A front office managers first step in planning should involve determine the departments goals. Planning also includes...
-
Hot exhaust gases of an internal combustion engine are to be used to produce saturated water vapor at 2 MPa pressure. The exhaust gases enter the heat exchanger at 4008C at a rate of 32 kg/min while...
-
Hot exhaust gases of an internal combustion engine are to be used to produce saturated water vapor at 2 MPa pressure. The exhaust gases enter the heat exchanger at 400°C at a rate of 32 kg/min...
-
29. According to cognitive dissonance theory, why do people change their attitudes to match their behaviour? (1 Point) People guess their attitude from the O behaviour they see themselves performing...
-
Presented below are the monthly factory overhead cost budget (at normal capacity of 5,000 units or 20,000 direct labor hours) and the production and cost data for a month. The predetermined overhead...
-
In Section 7.8, a point estimator n , for the current value of the parameter of a Poisson distribution was found. Adapt the argument to deal with the case where the underlying distribution is...
-
Determine if the mixed method aspect is concurrent, sequential,, or nested. Develop a hypothetical research scenario that would necessitate the use of the Mixed Method A-B-A Design. The research will...
-
Morlan Corporation is preparing its December 31, 2010, financial statements. Two events that occurred between December 31, 2010, and March 10, 2011, when the statements were issued, are described...
-
(a) Let3+ and 2 = a + bi be complex numbers. Suppose that 7 Argument = 12' find Argument(22). 7-2 (b) Let the map f: CC be defined by f(z) = Find f() if=1+2i. 1 (c) Solve the equation -12 i(9-2),...
-
Determine the output voltage for an integrator with a single-pulse input, as shown in Figure 1556. For repetitive pulses, how long will it take this circuit to reach steady state? 8 V 0 1 ms O...
-
A university surveyed recent graduates of the English Department for their starting salaries. Four hundred graduates returned the survey. The average salary was $25,000. The population standard...
-
Siemens is a global electronics and electrical engineering corporation, operating in energy, healthcare, infrastructure and industrial solutions sectors. Founded in Germany in 1925, the company has...
-
Making HRM decisions is often a group activity, as seldom does one person have all the required information, context, and expertise to tackle every HR issue. Working in a group, review the six trends...
-
The city of Jasper has conducted a job analysis of its firefighters. The job being analyzed is a fire apparatus operator/driver (FAOD). In addition to conducting regular firefighting activities,...
-
A retaining wall is shown in Figure 14.36. For each problem, determine the Rankine active force, Pa, per unit length of the wall and the location of the resultant. H H, Y V2 12 m 4 m 17 kN/m 23.2...
-
A test vendor has approached the vice president of HR in your company with a new test of conscientiousness. The test vendor claims that the new conscientiousness test is at least as valid as the old...
-
I have read the essay about " Caring for Your Introvert" byJonathan Rauch. Could someone help me to write a reading response about 1 page?
-
The power company must generate 100 kW in order to supply an industrial load with 94 kW through a transmission line with 0.09 resistance. If the load power factor is 0.83 lagging, find the...
-
A horizontal drum, a cross-section of which is shown below, is being filled with benzene (density = 0.879 g/cm 3 ) at a constant rate m_ (kg/min). The drum has a length L and radius r, and the level...
-
The flow rate of a process stream has tended to fluctuate considerably, creating problems in the process unit to which the stream is flowing. A horizontal surge drum has been inserted in the line to...
-
Cumene (C 6 H 5 C 3 H 7 ) is produced by reacting benzene with propylene [H r (77F) = -39;520 Btu]. A liquid feed containing 75 mole% propylene and 25% n-butane and a second liquid stream containing...
-
A single fair die is rolled. Let the event \(A\) be the face showing is even. Let the event \(B\) be the face showing is divisible by 3 . (a) List out the sample space of the experiment. (b) List the...
-
Two fair dice, one red and one green, are rolled. Let the event \(A\) be the sum of the faces showing is an even number. Let the event \(B\) be the sum of the faces showing is divisible by 3 . (a)...
-
Two fair dice, one red and one green, are rolled. Let the event \(A\) be the sum of the faces showing is equal to seven. Let the event \(B\) be the faces showing on the two dice are equal. (a) List...
Study smarter with the SolutionInn App