15. A reheat-regenerative engine receives steam at 207 bar and 593C, expanding it to 38.6 bar,...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
15. A reheat-regenerative engine receives steam at 207 bar and 593°C, expanding it to 38.6 bar, 343°C. At this point, the steam passes through a reheater and reenters the turbine at 34.5 bar, 593°C, hence expands to 9 bar, 492°C, at which point the steam is bled for feedwater heating. Exhaust occurs at 0.07 bar. Beginning at the throttle (point 1), these enthal- pies are known (kJ/kg): h, = 3511.3 h, = 3082.1 h, = 3010.0 h. = 3205.4 h, = 3662.5 h, = 163.4 h. = 322.9 h, = 723.59 h, = 2308.1 h, = 742.83 For ideal engine, sketch the events on the Ts plane and for 1 kg of throttle steam, find (a) the mass of bled steam, (b) the work, (c) the efficiency, and (d) the steam rate. In the actual case, water enters the boiler at 171°C and the brake engine efficiency is 75% (e) determine the brake work and the brake thermal efficiency. (f) Let the pump efficiency be 65%, esti- mate the enthalpy of the exhaust steam. Ans. (a) 0.19 kg/kg, (b) 1685.1 kj/kg, (c) 49.26%, (d) 2.14 kg/ kwh, (e) 1263.8 kJ/kg, 37.5%%; (f) 2742 kJ/kg 15. A reheat-regenerative engine receives steam at 207 bar and 593°C, expanding it to 38.6 bar, 343°C. At this point, the steam passes through a reheater and reenters the turbine at 34.5 bar, 593°C, hence expands to 9 bar, 492°C, at which point the steam is bled for feedwater heating. Exhaust occurs at 0.07 bar. Beginning at the throttle (point 1), these enthal- pies are known (kJ/kg): h, = 3511.3 h, = 3082.1 h, = 3010.0 h. = 3205.4 h, = 3662.5 h, = 163.4 h. = 322.9 h, = 723.59 h, = 2308.1 h, = 742.83 For ideal engine, sketch the events on the Ts plane and for 1 kg of throttle steam, find (a) the mass of bled steam, (b) the work, (c) the efficiency, and (d) the steam rate. In the actual case, water enters the boiler at 171°C and the brake engine efficiency is 75% (e) determine the brake work and the brake thermal efficiency. (f) Let the pump efficiency be 65%, esti- mate the enthalpy of the exhaust steam. Ans. (a) 0.19 kg/kg, (b) 1685.1 kj/kg, (c) 49.26%, (d) 2.14 kg/ kwh, (e) 1263.8 kJ/kg, 37.5%%; (f) 2742 kJ/kg
Expert Answer:
Related Book For
Thermodynamics for Engineers
ISBN: ?978-1133112860
1st edition
Authors: Kenneth A. Kroos, Merle C. Potter
Posted Date:
Students also viewed these mechanical engineering questions
-
A steam turbine receives steam at 6 MPa, 800C. It has a heat loss of 49.7 kJ/kg and an isentropic efficiency of 90%. For an exit pressure of 15 kPa and surroundings at 20C, find the...
-
Steam enters a turbine at 3 MPa, 450C, expands in a reversible adiabatic process and exhausts at 10 kPa. Changes in kinetic and potential energies between the inlet and the exit of the...
-
Steam enters a turbine at 3 MPa, 450C, expands in a reversible adiabatic process and exhausts at 10 kPa. Changes in kinetic and potential energies between the inlet and the exit of the turbine are...
-
Refer to the facts presented in problem P7-13. In problem On January 25, 2011, Douglas Ltd. purchased 1,000 common shares of BMO (Bank of Montreal) for $65 each. During the remainder of 2011, Douglas...
-
According to S. Sackrin of the U.S. Department of Agriculture, the price elasticity of demand for cigarettes is between - 0.3 and - 0.4, and the income elasticity of demand is about 0.5. a. Suppose...
-
In a team of three or four people, list the core competencies of your local public school district and explain why these items are core competencies. Make an appointment with the principal of one of...
-
Photovoltaics, Inc. is an Arizona-based manufacturer and distributor of photovoltaic solar energy units. The company was founded in 2015 by Arthur Manelas and Harry Linn. Manelas, formerly a research...
-
John Hayes and Lynn Magosian, auditors for a public accounting firm, went to lunch at the Bay View Restaurant in San Francisco. John left his raincoat with a coatroom attendant, but Lynn took her new...
-
Case Study - Retirement Plan David and Lisa have come to you to determine if their current level of savings will be sufficient to sustain their current lifestyle (i.e., disposable income) when they...
-
You send daily emails about a variety of topics for a shoe store. Your open rates are low, but sale announcements perform best. Which two marketing actions would most likely increase open rates?...
-
Analyse the engagement of a country ( senegal ) in two of the international organisations studied in the class ( your choice ) , one organisation dealing with international trade and one dealing with...
-
Suit Wars Men's Wearhouse Versus Jos. A. Bank 1. What is the business of each company and what are the synergies between them? 2. What kind of synergies, and their magnitude, do you expect in this...
-
People often have different ethical values. How could a relationship between a supervisor and his/her subordinate be affected if the supervisor asks the subordinate to engage in an activity the...
-
Fanning Corporation estimated its overhead costs would be $23,300 per month except for January when it pays the $132,240 annual insurance premium on the manufacturing facility. Accordingly, the...
-
Shortly after taking over for the previous chef at Magnolia's, Chef Hendrix theorized their restaurant's current menu prices had not been changed for some time. After a quick calculation, he was...
-
With specific reference to Butterworth's essay and to Kilgore's article, explain how sports rituals provide a space for both imposing and resisting terms for social order, especially around...
-
1. Explain at least four of the auditor's responsibilities within the case. Include the following details in your response: 1. Explain the auditor's responsibility when a person comes forward with...
-
DC has unused FTC carryover from 2017 in the separate category for GC income as the result of income generated by a foreign branch. The income was foreign source general category income. In 2018 the...
-
Work Problem 8.13, retaining all quantities except with the following turbine exit pressure: a) 50 kPa b) 30 kPa c) 20 kPa d) 10 kPa Rework Problem 8.13 An ideal Rankine power cycle is shown in Fig....
-
A frictionless piston allows a constant pressure in a cylinder containing 4 kg of saturated water vapor originally at 180C. If 4000 kJ of heat is added to the vapor, estimate the final temperature i)...
-
The steam table C-2E has a low pressure of 1 psia, unlike Table C-2, which has a much lower pressure of 0.611 kPa. A need is expressed for the saturation temperature of steam below 1 psia; suppose...
-
John Sheng, cost accountant at Starlet Company, is developing departmental manufacturing overhead application rates for the companys tooling and fabricating departments. The budgeted overhead for...
-
Calculate and Use Overhead Rate Bagley Corporation expects to incur \($450,000\) of factory over- head and \($600,000\) of general and administrative costs next year. Direct labor costs at \($20\)...
-
KAB, Inc. has two service departments (S1 and S2) and two production departments (P1 and P2). Information from the most recent year shows the following for each department: KAB allocates S1 to the...
Study smarter with the SolutionInn App