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- Carbon Dioxide is contained in a piston-cylinder assembly and undergoes a cycle made of the fol- lowing processes: • Process 1-2: Constant volume from 1 bar, 300 K to 600 K • Process 2–3: Polytropic expansion with n=k until P3 = P1 • Process 3-1: Isobaric compression (a) Sketch the cycle on p-v and T-v coordinates (b) Determine the work and heat transfer in each process, in kJ/kg (c) Determine the type of cycle that this is. If it is a power cycle, compute the thermal efficiency. Otherwise, compute the coefficient of performance for a heat pump cycle.The diagram presented represents a thermodynamic process experienced by 27.5mmol (millimoles) of a monatomic ideal gas. The volume axis is divided into equal increments υ0=777cm3 while the pressure axis is divided into equal increments p0=0.301atm. Part (a) How much work, in joules, does the gas perform on its environment during the thermodynamic process represented in the diagram? Part (b) What is the change, in joules, of the internal energy of the gas during the process represented in the diagram? Part (c) How much heat, in joules, is absorbed by the gas during the process represented in the diagram?(1) Specify whether the steam is wet, dry, or super-heated for the following conditions: (a) t = 200°C, p = 1.44 MPa (b) t = 220°C, p = 2.318 MPa. (c) p = 1.0 MPa, s = 6.672 kJ/kg•K
- Measured data for pressure versus volume during the compresion of a refrigerant within the cylinder of refrigeration compressor are given in the table below. Using data from the table, complete the following: (a) Determine a value of n such that the data are fit by an equation of the form, p V^n=constant. (b) Evaluate analytically the work done on the refrigerant, in BTU using Eq. 2.17 along with the result of part (a) (c) Using graphical or numerical integration of the data, evaluate the work done on the refrigerant, in BTU (d) Compare the different methods for estimating the work used in parts (b) and (c). Why are they estimates?By actual measurement, the enthalpy of steam at 8 bar is found to be 3000 KJ/Kg. What is the quality of steam? If 500KJ/Kg of heat is added to this steam, what is the (i) Superheated temperature (ii) Degree of superheat (iii) Enthalpy of superheat?A quantity of a certain perfect gas is compressed from an initial state of 0.085 m3, 1 bar to a final state of 0.034 m3, 3.9 bar. The specific heat at constant volume is 0.728 kJ/kg K, and the specific heat at constant pressure is 1.041 kJ/kg K. The observed temperature rise is 146 K. Calculate the specific gas constant R to three decimal places and state the unit.
- thermodynamics In order to describe the state of the water using the pure substance tables given below, 2 features are given. Determine the properties or properties asked from you for the following situations using thermodynamic tables and show the calculations.d. P = 1700 kPa T = 3000oC x =? h =? Phase state =?e. T = 5000oC h = 3487.7 kJ / kg P =? x =? ν =?With the aid of illustrations, describe the four types of thermodynamic process.Mollier Diagram: Steam Table Using the Steam Table below, find Δhf and Δhg in BTU/lbm and Δsf and Δsg in kJ/kgm-K and for the following parameters: P1 = 9.5 kgf/cm2 P2 = 15 kgf/cm2 NOTE: This table uses SI unit as stated below: Pressure: MPa Temperature: °C Internal Energy and Enthalpy: kJ/kgm Entropy: kJ/kgm-K
- Thermodynamics (Ideal Gas) one pound of air with an initial temperature pf 200F is allowed to expand without flow between pressure of 90 and 15 psia. If the air is undergoing a process that follows pVn=c, where n=1.5, what is the nonflow work?Question 1. Complete Units and Solution THERMODYNAMICS39 - A fixed volume insulated tank, which was initially empty, was connected by a valve to a distribution line carrying helium gas at a temperature of 125ºC. The valve is opened first and closed when the pressure is the same as the distribution line pressure. What is the final internal energy of helium in the tank? (Internal energy of the warehouse in the final state = Enthalpy of the distribution line). (Cp=5.1926) will be taken. a) 2066.7 kJ/kg B) 2014.7 kJ/kg NS) 701.0 kJ/kg D) 649.1 kJ/kg TO) 2118.6 kJ/kg