! Required information The PV diagram shown is for a heat engine that uses 1.150 mol of a diatomic ideal gas as its working substance. In the constant-temperature processes A and C, the gas is in contact with reservoirs at temperatures 373 K and 273 K, respectively. In constant-volume process B, the gas temperature decreases as heat flows into the cold reservoir. In constant-volume process D, the gas temperature increases as heat flows from the hot reservoir. Pressure (kPa) 1601 150 140 130 120 110 100 90 80 0.019 D 273 K A с 373 K B 0.02 0.021 0.022 0.023 0.024 0.025 0.026 Volume (m³) To compare the efficiency of the heat engine to that of an ideal engine, what is the ratio of the efficiency of an ideal engine using the same reservoirs to that of the heat engine, if the heat input per cycle is 3186 J?

! Required information The PV diagram shown is for a heat engine that uses 1.150 mol of a diatomic ideal gas as its working substance. In the constant-temperature processes A and C, the gas is in contact with reservoirs at temperatures 373 K and 273 K, respectively. In constant-volume process B, the gas temperature decreases as heat flows into the cold reservoir. In constant-volume process D, the gas temperature increases as heat flows from the hot reservoir. Pressure (kPa) 1601 150 140 130 120 110 100 90 80 0.019 D 273 K A с 373 K B 0.02 0.021 0.022 0.023 0.024 0.025 0.026 Volume (m³) To compare the efficiency of the heat engine to that of an ideal engine, what is the ratio of the efficiency of an ideal engine using the same reservoirs to that of the heat engine, if the heat input per cycle is 3186 J?

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

See similar textbooks

Similar questions

Air within a piston-cylinder assembly executes a Carnot heat pump cycle, as shown in the figure below. For the cycle, TH = 600 K and Tc = 300 K. The energy rejected by heat transfer at 600 K has a magnitude of 1000 kJ per kg of air. The pressure at the start of the isothermal expansion is 325 kPa. p-v diagram for a Carnot gas refrigeration or heat pump cycle. Assuming the ideal gas model for the air, determine: (a) the magnitude of the net work input, in kJ per kg of air, and (b) the pressure at the end of the isothermal expansion, in kPa.
Derive the 7 General Property equation of the following thermodynamic processes: 2. Isothermal Process
The pV diagram in (Figure 1) shows the cycle followed by the gas in an ideal-gas heat engine. 260 J of heat energy flow into gas from the hot reservoir during process 1-2. Figure p (kPa) 300 200- 100 0 0 1 260 J 200 400 600 QH = What is QH for one cycle of this heat engine? Express your answer with the appropriate units. ► View Available Hint(s) Submit μA 1 of 1 > Value V (cm³) Previous Answers Units ?
THERMOFLUIDS Consider a gas undergoing a thermodynamic cycle consisting of three processes from an initial state at P1 = 100 kPa , V1 = 0.81 m3.Process 1 - 2 : constant pressure compression work of 65 kJ,Process 2 – 3 : constant volume heating of 2600 kJ, andProcess 3 – 1 : isothermal expansion. b) Determine the:i. volume at the end of constant pressure compression, ii. net work for the thermodynamic cycle, and iii. heat transfer during constant pressure compression.
THERMOFLUID Consider a gas undergoing a thermodynamic cycle consisting of three processes from an initial state at P1 = 100 kPa , V1 = 0.81 m3. Process 1 - 2 : constant pressure compression work of 65 kJ,Process 2 – 3 : constant volume heating of 2600 kJ, andProcess 3 – 1 : isothermal expansion. a) Sketch the cycle on a clearly labelled P-V diagram and write appropriate First Law equations for all the three processes. Neglect the changes in kinetic energy and potential energy.
THERMOFLUID Consider a gas undergoing a thermodynamic cycle consisting of three processes from an initial state at P1 = 100 kPa , V1 = 0.81 m3.Process 1 - 2 : constant pressure compression work of 65 kJ,Process 2 – 3 : constant volume heating of 2600 kJ, andProcess 3 – 1 : isothermal expansion. a) Sketch the cycle on a clearly labelled P-V diagram and write appropriate First Law equations for all the three processes. Neglect the changes in kinetic energy and potential energy. b) Determine the:i. volume at the end of constant pressure compression, ii. net work for the thermodynamic cycle, and iii. heat transfer during constant pressure compression.
Water/steam is used to run a Carnot heat engine cycle, as shown in the figure below. During the isothermal expansion, the water/steam is heated until it is a saturated vapour from an initial state where the pressure is 40 bar and the quality is 15%. The vapour then expands adiabatically to a pressure of 1.5 bar. Which of the following values is the closest to the thermal efficiency of the cycle? 0.80 0.45 0.266 0.555 (44) S
BTU ETU 1. An ideal gas with R = 0.062- and Cy =0.158 undergoes a three 16-2 Ib"R process cycle in aclosed system. From the initial state of 20 psia and 570 °R, the gas is compressed at constant temperature to 1/5 of its initial volume, process 1-2; it is then heated isochorically to state 3,process 2-3; and finally, it expands polytropically with index n= 1.5 back to its initial state, process 3-1. Determine the pressures, specific volumes and temperatures at cardinal points around the cycle and the cycle thermal efficlency.
Derive the seven general property equation of the following thermodynamics processes: a. ISOMETRICPROCESS
Derive the 7 General Property equation of the following thermodynamic processes: 3. Polytropic Process
A piston-cylinder assembly contains 5 kg of air modeled as an ideal gas with a constant specific heat ratio, k = 1.4. R for air is 0.287 kJ/kg*K. The air undergoes a power cycle Process 1-2: Isothermal expansion at 600 K from Pi = 1 MPa to p2 = 0.7 MPa. consisting of four processes in series: Process 2-3: Polytropic expansion (n = k) to p3 = 0.5 MPa. Process 3-4: Constant pressure compression to V4 = V1. Process 4-1: Constant volume heating to pi = 1 MPa Part a.) Draw the p-v diagram and label all pressures and volumes with units. Part b.) Fill in as much of the charts below as you can. Process Q (net) kJ W (net) kJ AU KJ 1-2 2-3 3-4 4-1 Cycle (Total) State T (K) P (kPa) V(m³) Ulk)) 3 Part c.) Determine the thermal efficiency for the cycle.
(1.3) Suppose a process increases Gibbs free energy of a system coupled to both a heat bath and volume reservoir, i.e., AG > 0. What does that tell you about the system's coupling to work reservoirs? Explain. Answer: