In an energy audit, the following information was obtained from the inspection of a boiler: Fuel:...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
In an energy audit, the following information was obtained from the inspection of a boiler: Fuel: Rating (input) Output: Exhaust Temperature: Exhaust Gas Analysis on dry basis: CO₂ 02 N2 Natural Gas 10 million (MM) Btu/hr Saturated Steam at 55 psig 450 F Calculate: 8.6% 5.6% Balance Assume 3% loss due to surface losses and blow-down. a - Fuel air ratio (assume that natural gas can be taken as methane) b - Mass flow rate of fuel and air c - Mass flow rate of steam generation if the feed water (water entering the boiler) is at 180 F. d - Maximum flame temperature that can be expected in the boiler? You may use an online calculator for this purpose. e - Boiler efficiency f- It is decided to recover heat from the exhaust by directing the feedwater through the heat exchanger to be installed on the exhaust stack, to cool the exhaust to 300 F. Calculate % of the energy saved by installing the heat exchanger (economizer). Submit your results along with a tech memo summarizing your results. In an energy audit, the following information was obtained from the inspection of a boiler: Fuel: Rating (input) Output: Exhaust Temperature: Exhaust Gas Analysis on dry basis: CO₂ 02 N2 Natural Gas 10 million (MM) Btu/hr Saturated Steam at 55 psig 450 F Calculate: 8.6% 5.6% Balance Assume 3% loss due to surface losses and blow-down. a - Fuel air ratio (assume that natural gas can be taken as methane) b - Mass flow rate of fuel and air c - Mass flow rate of steam generation if the feed water (water entering the boiler) is at 180 F. d - Maximum flame temperature that can be expected in the boiler? You may use an online calculator for this purpose. e - Boiler efficiency f- It is decided to recover heat from the exhaust by directing the feedwater through the heat exchanger to be installed on the exhaust stack, to cool the exhaust to 300 F. Calculate % of the energy saved by installing the heat exchanger (economizer). Submit your results along with a tech memo summarizing your results.
Expert Answer:
Answer rating: 100% (QA)
a Fuel air ratio Assuming the natural gas composition is pure methane CH4 the stoichiometric airtofuel ratio is 954 kg airkg fuel From the exhaust gas analysis the O2 concentration is 56 This indicate... 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 finance questions
-
1. The adjusted trial balance for DeSousa Company is listed below. Journalize the closing entries at April 30. DESOUSA COMPANY Worksheet (partial) For the Month Ended April 30, 2014 Adjusted Trial...
-
The following information was obtained from several accounting and auditing enforcement releases issued by the Securities and Exchange Commission (SEC) after its investigation of fraudulent financial...
-
The following information was obtained from several accounting and auditing enforcement releases issued by the Securities and Exchange Commission (SEC) after its investigation of fraudulent financial...
-
A firm has $180 million in annual sales; $40 million of inventory and $60 million of accounts receivable. What is the inventory turnover ratio?
-
The American Association of University Professors (AAUP) reports yearly on faculty salaries for all types of higher education institutions across the United States. The following table lists the mean...
-
Orestesconsidershimselfasavvysocialmedia"influencer"withtwomillionTwitterfollowersandonemillionInstagramfollowers.He'susedtousinghis"influencer"togetfreegoodsandservicesinexchangeforofferingthem"expos...
-
An increase in sales _________ the P/E ratio.
-
1 Sticking to the 35-word limit suggested by Collis and Rukstad in Section 1.2.3, what strategy statement would you propose for Airbnb? 2 Carry out a three-horizons analysis (Section 1.2.1) of...
-
2- Air with pressure, temperature and density corresponding to a standard altitude of 12 km is allowed to expand isentropically to a state where temperature is 100 K. Calculate the pressure, specific...
-
The finance director for the City of Green Falls printed the General Fund Revenues and Appropriations Ledgers shown below for the year just ended. The beginning-of-the-year fund balance was $160,160....
-
Find (a) the slope of the curve at the given point P, and (b) an equation of the tangent line at P. y= -2-7x2: P(5, - 177). (a) The slope of the curve at P is (Simplify your answer.) (b) The equation...
-
Contract for construction crew and equipment 8 Build parking lots Exterior lighting 11 7 20 12 Build foundation Start Interior Interior 12 9 electrical Final wiring finish Purchase 8 14 12 material...
-
Mad Hatter Enterprises purchased new equipment for $369,000, terms f.o.b. shipping point. Other costs connected with the purchase were as follows: State sales tax Freight costs Insurance while in...
-
Write down a C program that takes runs scored by a batsman and prints the status according to the following policy: Runs scored >80 50-79 30-49 10-29 <10 Grade Excellent 4 Very Good Good Average Poor
-
Consider the standard two-period maximization problem for investor j over s states of nature: Subject to S max u(c) + (s)u(c;}(s)) S=1 Cjo + q(s) C; (s) = Wjo +244) S=1 where all terms are as defined...
-
At what point should a leader cease gathering data, take the risk, and simply make the decision? Support your position.
-
Griffins Goat Farm, Inc., has sales of $681,000, costs of $343,000, depreciation expense of $87,000, interest expense of $53,500, a tax rate of 24 percent, and paid out $39,500 in cash dividends. The...
-
In Exercises 1-2, rewrite each verbal statement as an equation. Then decide whether the statement is true or false. Justify your answer. 1. The logarithm of the difference of two numbers is equal to...
-
Monochlorobenzene (M) is produced commercially by the direct catalytic chlorination of benzene at 40?C and 120 kPa absolute. In the process, dichlorobenzene (D) is generated as a co product: Liquid...
-
A 20,000-liter storage tank was taken out of service to repair and reattach a feed line damaged in a collision with a tanker. The tank was drained and then opened several days later for a welder to...
-
Mammalian cells can be cultured for a variety of purposes, including synthesis of vaccines. They must be maintained in growth media containing all of the components required for proper cellular...
-
EXCEL CASE The City of Loveland previously adopted GASB Statement 34. Now city officials are attempting to determine reported values for major infrastructure assets that it had obtained prior to the...
-
COMMUNICATION CASE 1 Read the following articles and any other papers that are available on setting governmental accounting standards: 25 Years of State and Local Governmental Financial ReportingAn...
-
ANALYSIS CASE 2 Go to Web site www.portlandonline.com/omf/index.cfm?c=43896 and find the 2006 comprehensive annual financial report for the City of Portland, Oregon. One of the most important changes...
Study smarter with the SolutionInn App