Problem 1: idealised Lenoir heat engine cycle [15 marks] (a) Please explain what adiabatic process, isochoric...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Problem 1: idealised Lenoir heat engine cycle [15 marks] (a) Please explain what "adiabatic process", "isochoric process" and "isobaric process" are. (b) In an idealised version of the Lenoir heat engine cycle, the gas which was originally having a temperature T₁, volume V₁ and pressure P₁ absorbs an amount of heat QH from a hot reservoir which is maintained at temperature T2, the heat absorption being an isochoric process and continuing until the gas has thermally equilibrated with the hot reservoir. At this point the pressure of the gas is P₂. The gas in the engine then undergoes an adiabatic expansion, reaching a volume V3 at which point the pressure of the gas is P₁. In the final step of the cycle, the gas releases heat of magnitude Qc into a cold reservoir (which has temperature 7₁), by undergoing an isobaric compression until it reaches its original equilibrium state T = T₁, V = V₁, P = P₁. Please draw the Lenoir cycle on a PV diagram. (c) Please calculate QH and Qc. (d) Please write down a relation between the temperatures and pressures of a pair of equilibrium states connected by an adiabatic process. (e) By assuming that the gas is an ideal gas which stays inside the engine (so the number of moles is constant), and making use of the relation you derived in part (d), please derive the efficiency of the idealised Lenoir cycle, expressing your answer in terms of only (which is the ratio Cp/Cy) and the temperatures of the hot and cold reservoirs. Problem 1: idealised Lenoir heat engine cycle [15 marks] (a) Please explain what "adiabatic process", "isochoric process" and "isobaric process" are. (b) In an idealised version of the Lenoir heat engine cycle, the gas which was originally having a temperature T₁, volume V₁ and pressure P₁ absorbs an amount of heat QH from a hot reservoir which is maintained at temperature T2, the heat absorption being an isochoric process and continuing until the gas has thermally equilibrated with the hot reservoir. At this point the pressure of the gas is P₂. The gas in the engine then undergoes an adiabatic expansion, reaching a volume V3 at which point the pressure of the gas is P₁. In the final step of the cycle, the gas releases heat of magnitude Qc into a cold reservoir (which has temperature 7₁), by undergoing an isobaric compression until it reaches its original equilibrium state T = T₁, V = V₁, P = P₁. Please draw the Lenoir cycle on a PV diagram. (c) Please calculate QH and Qc. (d) Please write down a relation between the temperatures and pressures of a pair of equilibrium states connected by an adiabatic process. (e) By assuming that the gas is an ideal gas which stays inside the engine (so the number of moles is constant), and making use of the relation you derived in part (d), please derive the efficiency of the idealised Lenoir cycle, expressing your answer in terms of only (which is the ratio Cp/Cy) and the temperatures of the hot and cold reservoirs.
Expert Answer:
Related Book For
Data Structures and Algorithms in Java
ISBN: 978-1118771334
6th edition
Authors: Michael T. Goodrich, Roberto Tamassia, Michael H. Goldwasser
Posted Date:
Students also viewed these mechanical engineering questions
-
An earlier version of the IBM mainframe, the S/390 G4, used three levels of cache.As with the z990, only the first level was on the processor chip [called the processor unit (PU)].The L2 cache was...
-
Problem 1: idealised Lenoir heat engine cycle [15 marks] (a) Please explain what "adiabatic process", "isochoric process" and "isobaric process" are. (b) In an idealised version of the Lenoir heat...
-
Write an interactive version of the InchesToFeet class that accepts the inches value from a user. Save the class as InchesToFeetInteractive.java.
-
Refer to the Journal of Experimental Psychology-Applied (June 2000) name-retrieval study, presented in Exercise. The data for the study are saved in the NAMEGAME2 file. a. Find a 99% confidence...
-
What are the four specific revenue recognition criteria emphasized by the SEC?
-
Explain the differences between manufacturing overhead, upstream and downstream costs, and the indirect costs of responsibility centres.
-
Assuming the same data as given in problem 9, was the well in each case profitable? Discuss your answer. Problem 9:- Property cost (acquisition cost). Drilling cost (one well). Estimated completion...
-
Balance sheet data for Bryant company on December 31, the end of the fiscal year, are shown below. Prepare a comparative balance sheet for 2012 and 2011, stating each asset as a percent of total...
-
Consider again the market studied in Question 2, The demand curve is given by P = 100 Q and the marginal cost curve is given by MC = 10. This time we are going to assume that firms must invest funds...
-
Whine purchased 80% of the outstanding voting shares of Dine Inc. on December 31, 2018. The balance sheets of both companies on that date are shown below (after Whine acquired the shares): WHINE DINE...
-
When a U.S. company expands from domestic markets by exporting, what are some of the HRM challenges the company faces? What challenges will be presented when a company changes from simply exporting...
-
What are the most common areas where there is financial waste within a landscape project?
-
6. Process Payroll - a) What do you click to process payroll? - b) If there are errors on a paycheck it can be _____ and /or __________ 7. Remit Payroll taxes a) Where in QBO do you go to process...
-
Under the Health and Safety at Work Act, an employer must. Select the correct answer. Provide a bright, cheerful place to work. Safeguard the safety and health of all employees. Give everyone their...
-
Looking at an account that preserves some of the money as well as growing some at a low rate, would be appropriate for which time horizon: Immediate Short-Term Intermediate-Term Long-Term
-
The fund's investments are selected by A fund is two products in one: 1. an investment 2. source of revenue for the company that created and runs the fund: ________________________ vary from fund to...
-
1. What is maritime law? 2. Why is it that Maritime Law is so important? 3. As per Law of the Sea, What do you mean by the following ? Internal Waters, Territorial Sea, Continental shelf, Contiguous...
-
Find the inverse, if it exists, for the matrix. -1
-
Implement a circular version of a doubly linked list, without any sentinels, that supports all the public behaviors of the original as well as two new update methods, rotate( ) and rotateBackward( ).
-
Is our array-based implementation of merge-sort given in Section 12.1.2 stable? Explain why or why not.
-
Give Java code for performing add(e) and remove(i) methods for the Scoreboard class, as in Code Fragments 3.3 and 3.4, except this time, dontmaintain the game entries in order. Assume that we still...
-
Given the following information, answer the questions about this project: a. Draw the network as a Gantt chart. b. What is the critical path? Which activities have slack time? c. What would happen if...
-
Develop a Gantt chart with the following information. What is the expected duration of the project? What is the critical path? Activity Expected Duration Predecessors A BL 12 8 None None C 5 None D...
-
Consider a project with the following information. Construct the project activity network using AOA methodology and label each node and arrow appropriately. Identify all dummy activities required to...
Study smarter with the SolutionInn App