A closed, expandable system like that shown below is operated in an adiabatic manner.First, 15,000 lb;ft of work are done by this system. Then, work is applied to the stirringdevice to raise the internal energy of the fluid by 10.28 Btu. 1) Calculate the net increasein the internal energy of this system, and 2) explain how you could calculate the change intemperature of the system.002019 McGraw-Hill Education

Answered: Image /qna-images/answer/25544f5f-7c6a-4258-b42a-f36bacd8eb8d.jpg

Answered: A closed, expandable system like that…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Critically evaluate fluid flow and energy principles in relation to their application in the design and control of heating system and water services design.
Q.1. A refrigeration process with interstage cooling uses refrigerant HFC-134a, and the outlet of the condenser is to be saturated liquid at 40°C. Refer to the following figure for stream numbers in your solution. The pressure of the flash chamber and the intermediate pressure between compressors is to be 290 kPa. The evaporator is to operate at -20°C and the outlet is to be saturated vapor. The flowrate of stream 1 is 23 kg/h. The flash chamber may be considered adiabatic. The compressors may be considered to be 80% efficient. a) What is the power input required to the first compressor? b) What are the flowrates of streams 6 and 7? What is the enthalpy of stream 4? Hot Side 6 5 Condenser 2nd Stage Compressor Throttle Valve 7 Flash Chamber Vapor Phase Only 1st Stage Compressor 8 Throttle Valve Evaporator 1 2 Cold Side
Hello! I'd like help with the following exercise, from Levenspiel's "Engineering Flow and Heat Exchange". Leftover air at 20ºC and 100kPa is driven by a fan through a horizontal galvanized conduit of 1 m in diameter and 10m in length at a speed of 10 m/s. What size motor should be used if its efficiency is 90% and that of the fan is 20%? I'm not sure where to start. My professor hasn't explained much about this subject.
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1. The mean effective pressure of an engine running at 300 rpm is 500 kPa. What is the indicatedpower if the engine has bore of 250 mm x 450 mm. Select the correct answer below: A. 110.5 kW B. 150 kW C. 200 kW D. 182. 2 kW 2. In a certain process, entering is 1500 KJ/kg and 150 m/s. If the energy leaving is 12000 Kj/kg/ Determine the velocity at exit. Select the correct answer below: A.) 145 m/s B. 1020 m/s C. 789 m/s D. 978 m/s
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_is the amount of heat transferred to water to produce the required quantity of steam Quality of steam O Capacity of boiler Quantity of steam Steaming rate
QUESTION 3 A manufacturer conducted an experiment for an evaporator capacity 500 kW cooling and designed for high COP of 2 when using lithium bromide plus water in an absorption refrigeration system. The evaporator operates 20 C, condenser 40 C & absorber 45 C supplying 1.4 kg/s of water plus lithium bromide solution to the generator. For a condenser size of 650 kW, determine: Show in your solution paper: Chart reading for Concentration and Enthalphy of solution being pumped Provide in the Answer Box: Enthalpy of solution being pumped in kJ/kg
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2. What is the "flow work" (or "flow energy") of a fluid in a closed and adiabatic system, which has no work interaction with the environment? 3. List the forms of energy that a flow might carry outside the control volume. 4. What is the main role of a nozzle? 5. State one similarity and one difference between the turbine and the compressor 6. Consider a tank that is rigid, insulated, initially evacuated and is connected via a valve with a supply line (tube) that carries steam. The valve is then opened and steam flows into the tank, until the pressure in the tank equals that in the tube. How is the temperature in the tank at the end of the process related to the temperature in the tube? Explain.

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