Q3: Air undergoes a three-process cycle. if the processes are :12: constant- pressure expansion .2→ 3: constant volume 3 → 1: constant-temperature compression .The necessary information is T1 = 100°C, T2 = 600°C, and P1 = 200 kPa. R=0.287 KJ/kg.K 1)Find the net work done for 1 kg

Q3: Air undergoes a three-process cycle. if the processes are :12: constant- pressure expansion .2→ 3: constant volume 3 → 1: constant-temperature compression .The necessary information is T1 = 100°C, T2 = 600°C, and P1 = 200 kPa. R=0.287 KJ/kg.K 1)Find the net work done for 1 kg

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 30RQ: A gas is compressed inside a compressor's cylinder. When the piston is at its bottom dead center,...

See similar textbooks

Similar questions

Q 1: For a particular gas system, the internal energy is given by : U = 2.5 PV + C , where P: Presure , V: volume and C : constant, the sysytem is taken into cycle shown in fig.(Q1) below with three Processes, Calculate Q & W if the pressure is given by P= 105+ 10° (v-0.02)² ? 0.5- 0.4E 0.3E A 0,2 A 001 002 003 V (m³) > Fig. (Q1) P (MPa)►
DEVICE is REFRIGERATION & 12 23 3 4 4 → 1 At 1. AT 2: AT 3 AT 4 : : ADIABATIC COMPRESSION COOL AT CONSTANT PRESSURE P1 = ADIABATIC EXPANSION HEATING AT CONSTANT PRESSURE P2 = P1 = A BAR P2 P3 3.2 BAR ASK: A) B) T2 c) HEAT 74 T1 HEAT CAPACITIE C 4 тн E SPECIFIC HEAT RATIO OF WORKING Y = 1.5 T3 = EXCHANGE S UNDERGOES REVERSE BRAYTON CYCLE -5.15e MABS OF WORKI G SUBSTANCE M = 116g 17.85°C SUBSTANCE cu & Cp iN CELCIUS Q23 IN s/g & Q41 is IDEA
Determine the amount of work required to compressed 1.5 kg of air at a pressure of 7 barg. Theisentropic index is 1.2 and the air intake is at 1 bar, 200C & RH =65%.i) Find the temperature at the end of the compression.ii) Represent the above process on a p‐v diagram.iii) If the isentropic efficiency is 65%, find the indicated or real work.iv) Find the shaft work needed if the mechanical efficiency is 75%.v) The discharged air is passed through an R134a refrigerant dryer, the temperature of aircoming out the dryer is 400C. The air then settles inside a reservoir at a temperature of 250C. Determine:a. The humidity variation throughout the production of compressed airb. The amount of condensate formed at each stage of the process by usingi. The humidity definitionii. The Atlas‐copco simplified formula,Compare your resultsiii. If the system is in operation 8 hrs per day, 7 day a week; find the amount ofcondensate produced for a year.
In an isentropic non-flow process with air, the pressure drops from 77 psia to 20 psia. The air has a mass of 0.3 lb and the initial temperature was 292 °F. Find the followinga. Final temperature, °Fb. Heat transferred, Btuc. Work done, ft-lbf
Q 1: For a particular gas system, the internal energy is given by : U = 2.5 PV + C , where P: Presure , V: volume and C : constant, the sysytem is taken into cycle shown in fig.(Q1) below with three Processes, Calculate Q & W if the pressure is given by P= 105 + 10° (v-0.02)² ? 0.5 0.4 0.3 0.2 B A 0.1 001 002 003 V (m³) -> Fig. (Q1) P (MPa)►
Q 1: For a particular gas system, the internal energy is given by : U = 2.5 PV + C , where P: Presure , V: volume and C: constant, the sysytem is taken into cycle shown in fig.(Q1) below with three Processes, Calculate Q & W if the pressure is given by P= 105 + 10° (v-0.02)² ? 05 04 V (m') Fig. (Q1) 02: Arigid tank of (0.3 m) at 15.5 bar , if 90% of mass is liquid water, how much heat must be added before the tank becomes just full of the liquid? 03/ An ideal gas is changed from pl = 1bar, vl= 10m³ to p2 =10 bar , v2 = 1m², calculate Q & W for the follwing process: a- Isothermal process. b- adiabatic compression followed by cooling process at constant pressure. c- Heating at constant volume followed by cooling at constant pressure? Take Cp= (5/2)R & Cv=(3/2) R Q4: A tank having a volume of 0.85 m³ initially contains water as a two-phase liquid- vapor mixture at 260°C and a quality of 0.7. Saturated water vapor at 260°C is slowly withdrawn through a pressure-regulating valve at the top…
Q 1: For a particular gas system, the internal energy is given by : U = 2.5 PV + C , where P: Presure , V: volume and C : constant, the sysytem is taken into cycle shown in fig.(Q1) below with three Processes, Calculate Q & W if the pressure is given by P= 105+ 10° (v-0.02)² ? 05- 0.4 0.3E A 02E 0.1 0.01 002 003 V (m³) -> Fig. (Q1) P (MPa)
An oxygen gas R = 0.2598 KJ/kg°k and k = 1.395. If 4 kg of oxygen undergo a reversible non flow constant pressure process from initial volume =1.2 cubic meter and initial pressure = 690 kPa to a state where final temperature = 600°C. Find intial temperature. B) Change in internal energy. C) Change in enthalpy
In a piston-cylinder assembly, there is initially a pressure of 300 kPa, a temperature of 150oC and a volume of 0.5 m3 of air. Until air doubles in volume with PVn=constant polytropic processexpands as much. For n =1, n = k and n = 1.6a. final pressure of the air,b. Moving border work,c. Calculate the heat transfer.(Note: take constant specific heat values at room temperature (at 300 K).)
Determine the amount of work required to compressed 1.5 kg of air at a pressure of 7 barg. The isentropic index is 1.2 and the air intake is at 1 bar, 200C & RH =65%. i) Find the temperature at the end of the compression. ii) Represent the above process on a p‐v diagram. iii) If the isentropic efficiency is 65%, find the indicated or real work. iv) Find the shaft work needed if the mechanical efficiency is 75%. v) The discharged air is passed through an R134a refrigerant dryer, the temperature of air coming out the dryer is 400C. The air then settles inside a reservoir at a temperature of 25 0C. Determine: The humidity variation throughout the production of compressed air The amount of condensate formed at each stage of the process by using The humidity definition The Atlas‐copco simplified formula,Compare your results If the system is in operation 8 hrs per day, 7 day a week; find the amount of condensate produced for a year.
10. A gas expands at a constant pressure of 600 kPa. During the expansion 54 kJ are work done by the gas. If T1 = 290 K and V, = 0.01 cu. m., find the final temperature of the gas. А. 3500 К В. 2600 K C. 2900 K D. 26900 K
Determine the amount of work required to compressed 1.5 kg of air at a pressure of 7 barg. The isentropic index is 1.2 and the air intake is at 1 bar, 20C & RH =65%. i) Find the temperature at the end of the compression. ii) Represent the above process on a p‐v diagram. iii) If the isentropic efficiency is 65%, find the indicated or real work. iv) Find the shaft work needed if the mechanical efficiency is 75%.