! Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A 1.1-m³ rigid tank contains refrigerant-134a initially at 200 kPa and 40 percent quality. Heat is transferred now to the refrigerant from a source at 35°C until the pressure rises to 400 kPa. Determine the entropy change of the refrigerant. Use the tables for R-134a. (You must provide an answer before moving on to the next part.) The entropy change of the refrigerant is kJ/K.

! Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A 1.1-m³ rigid tank contains refrigerant-134a initially at 200 kPa and 40 percent quality. Heat is transferred now to the refrigerant from a source at 35°C until the pressure rises to 400 kPa. Determine the entropy change of the refrigerant. Use the tables for R-134a. (You must provide an answer before moving on to the next part.) The entropy change of the refrigerant is kJ/K.

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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Part A-Classical Type of Questions Q1) In an ice-making plant, water at 0 °C is frozen at atmospheric pressure by evaporating saturated R-134a liquid at -26 °C. The refrigerant leaves this evaporator as a saturated vapor, and the plant is sized to produce ice at 0 °C at a rate of 3500 kg/h. -26°C sat. vapor R-134a -26°C (a) Show the entropy balance for the process (b) Determine the rate of heat transfer (c) Calculate the mass flow rate of refrigerant R-134a (d) Determine the rate of entropy generation in this plant (e) Show the process on a T-s diagram for R-134a with respect to saturation lines (Please show the related values of the parameters in the diagram)
E.2) A paint shop compressor has a storage tank for compressed air with a volume of 1 m³. It initially contains air at 1 MPa and 400 K. The feed valve is opened and air flows into the tank until the pressure reaches 5 MPa and the inside temperature is 450 K. At that time the valve closes. Determine the amount of air that was introduced into the tank. Finally, after the tank cools down, it reaches a room temperature of 300 K. Determine the air pressure at that condition.
A reheat cycle with two stages of reheating is executed with steam expanding initially from 25 MPa and 600 °C. The two reheater pressures are 4 MPa and 1 MPa, and the steam leaves each reheater at 600 °C. Condensation occurs at 40°C. For 1 kg/s of steam, what is QA in kW? Remember, 1. For values taken from the steam tables: Use them as is, do not round off. 2. For values obtained by interpolation and final answers obtained by solving, use FOUR (4) decimal places. 3. Use the steam tables provided
! Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A 1.1-m³ rigid tank contains refrigerant-134a initially at 200 kPa and 40 percent quality. Heat is transferred now to the refrigerant from a source at 35°C until the pressure rises to 400 kPa. Determine total entropy change for this process. The total entropy change for this process is KJ/K.
stion Completion Status: QUESTION 37 In an experiment, a certain amount of air is heated at constant pressure from 1.7 m, 33 °C and 97 kPa to 408 C. It is then cooled at constant volume back to its initial temperature. Calculate the change specific entropy in the cooling process in the correct unit in SI and 1 decimal place. Take Specific heat at constant pressure and constant volume for air as 1.005 kJ/kg K and 0.717 kJ/kg K respectively. add units. I decimal place. QUESTION 38 Save A Click Save and Submit too save and submit. Click Save All Answers to save all answers. 9d6070-5984-jpg O Type here to search
1. Steam at a temperature of 250oC has a specific volume of 0.15436 m3/kg. What are the pressure, specific internal energy, enthalpy, and entropy?
4. In a natural gas pipe line compressor, 110 m³/min of propane is compressed polytropically. The inlet pressure is 101 kPaa and the temperature is 38°C. The process follows pV1.08 = C. The exit pressure is 510 kPaa. Determine (a) the exit temperature in kelvins, (b) the mass flow rate in kg/s, and (c) the heat loss in kW. Draw the P-V and T-S diagrams
QUESTION 2 The steam is now heated at constant pressure until the enthalpy Superheated steam at 400°C has a specific volume of 0.1511m³/kg. becomes 3690kJ/kg. It is then cooled at constant volume to a pressure of 900kPa. 2.1 Illustrates the complete processes on a temperature-entropy and a pressure-volume diagram. S P Use steam tables only and determine: 2.2 the initial pressure of the steam; 2.3 the condition of the steam after cooling;
A1 m3 vessel contains saturated vapor water at 100 kPa. The vessel was cooled to 70°C. The surrounding is at 27°C. Select all correct statements. O a. If cooling was done while maintaining the pressure at 100 kPa, the process would result in superheated steam. O b. The total mass of water in the vessel is 590.42 g. O c. Assuming the heat removed from cooling dissipated into the surroundings, the total change in entropy, AST, is 0.483 kJ/K. O d. After the cooling process, approximately 33.5% of the water is in the vapor phase O e. A total of 875.53 kJ of heat was removed from the system for the cooling process. Of. A total of 758.53 kJ of heat was removed from the system for the cooling process. g. Assuming the heat removed from cooling dissipated into the surroundings, the total change in entropy, AST, is 0.834 kJ/K.
PROBLEM 3. In a constant volume process, 1.5 kg of air is cooled from 1,200 °K. Change in entropy is -0.492 KJ Determine the final temperature in °K. K
2.) There is 1.5 kgm of a gas where k = 1.3 and R = 0.38 kJ/kgm-K that undergoes an isochoric process from p1 = 0.552 MPa, t1 = 58.50C to p2 = 1.66 MPa. During the process, there %3D added 100 kJ of heat. Compute for the heat transferred, change of internal energy, and change of entropy.
Q1) In a turbine-compressor system, the steam enter the adiabatic turbine at 3 MPa, 500°C, and velocity 50 m/s. The exit condition of the steam are 20 kPa, ve = 46.231962 m³ /kg, and velocity 40 m/s. The turbine operate insulated compressor to deliver 120 kPa, 47°C, and velocity 10 m/s of air to the high pressure at 500K. determine the compressor outlet velocity. Steam Turbine Compressor Air