Carbon dioxide (assume ideal gas) is compressed from 120 kPa and 227°C to 700 kPa and 427°C at a mass flow rate of 5 kg s-1. 100 kW is lost to the environment in the process. Determine the work required
Carbon dioxide (assume ideal gas) is compressed from 120 kPa and 227°C to 700 kPa and...
a piston -cylinder device contains 2.5 Kg of carbon dioxide (CO2 ) initially at 100 KPa and 300o C. The carbon dioxide is then compressed to 200 kPa following a process of Pv1.25 =constant. Determine (A) the boundary worked needed for the process (B) The temperature after compression . use Ideal gas state and Pressure in absolute pressure ; R=0.1889 KJ/Kg-K
Problem #4 Carbon dioxide is compressed adiabatically in a piston – cylinder arrangement form 500 kPa and 310 K to 2.5 MPa. What is the minimum work required for the compression process if the initial volume is 0.04 m3 . Consider carbon dioxide as ideal gas with: a) constant specific heat. b) Variable specific heat.
Nitrogen at 120 kPa and 30°C is compressed to 620 kPa in an adiabatic compressor. Calculate the minimum work needed for this process in kJ/kg. Use the table containing the ideal gas specific heats of various common gases. The minimum work needed for this process is k J/kg.
2. Helium Gas is compressed from 90kPa and 30° C to 50 kPa in a reversible, adiabatic process. Determine the final temperature, the work done and the entropy generation, assuming the process takes place in a steady-flow compressor. Assume that Helium is an ideal gas with Cp=3.5R.
A piston-cylinder contains 1.8 kg of carbon dioxide at 190°C and 1.7 MPa. It is compressed t<o 3.4 MPa through a polytropic process whereP「--const. Determine the final temperature treating the carbon dioxide as (a) an ideal gas T2 and (b) a ver der Waals gas.
Air is compressed steadily by a reversible compressor from 100
kPa and 300 K to 900 kPa by a 10-kW motor. Assume air is both ideal
and has constant specific heat capacity values determined at room
temperature from Table A-2 at room temperature (300 K).
a) Determine the mass flow rate through the compressor if the
process is isentropic. ( find and identify the work per unit
mass)
b) polytropic with n = 1.2
c) isothermal
d) ideal two-stage polytropic...
answer both 1&2 please
9:08 LTE HomeWork-5.pdf 1 of 2 MEEN 2374 Home work #5 Air is compressed from 120 kPa and 310 K to 600 kPa and 550 K. A heat loss of 20 kJ/kg occurs during the process. Determine the power required for a mass flow rate of 3.2kg's 2. Steam at 5 MPa and 500 C expands adiabatically to 75 kPa. If the exhaust steam has a vapor quality of 0.9, determine the work output of this...
Air, modeled as an ideal gas, is compressed at steady state from 1 bar, 300 K, to 5 bar, 500 K, with 190 kW of power input. Heat transfer occurs at a rate of 25.33 kW from the air to cooling water circulating in a water jacket enclosing the compressor. Neglecting kinetic and potential energy effects, determine the mass flow rate of the air, in kg/s.
Air enters the compressor of an ideal Brayton refrigeration cycle at 140 kPa, 270 K, and is compressed to 420 kPa. At the turbine inlet, the temperature is 320 K and the volumetric flow rate is 0.4 m3/s. Determine (a) the mass flow rate, in kg/s (b) the net power input, in kW (c) the refrigerating capacity, in kW (d) the coefficient of performance Round answers to 3 significant digits.
Argon is compressed in a polytropic process with n= 1 from 120 kPa and 10°C to 600 kPa in a piston–cylinder device. Determine the work produced and heat transferred during this compression process, in kJ/kg. For Argon, R is 0.2081 KJ/kg K, Cv =0.3122 KJ/kg K