Refrigerant R 134 a enters an adiabatic heat exchanger at 140 kPa with a quality of 40% and a flow rate of 0.033 kg/s and leaves as saturated vapor at the same pressure. While Air inters the heat exchanger at 100 kPa and 25 °C with a volume flow rate of 0.1 m /s. Considering air as ideal gas with constant specific heat, Find: a) Exit temperature of air in K b) Rate of entropy generation for the process in kW/K

Refrigerant R 134 a enters an adiabatic heat exchanger at 140 kPa with a quality of 40% and a flow rate of 0.033 kg/s and leaves as saturated vapor at the same pressure. While Air inters the heat exchanger at 100 kPa and 25 °C with a volume flow rate of 0.1 m /s. Considering air as ideal gas with constant specific heat, Find: a) Exit temperature of air in K b) Rate of entropy generation for the process in kW/K

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.17P

See similar textbooks

Similar questions

A compressor in a plant receives air at 100 kPa, 280 K, with low velocity. At compressor discharge, air exits at 1100 kPa, 500 K with velocity 25 m/s and then flows into a constant pressure heat exchanger where it is cooled down to 350 K. The power required the compressor is 50 kW. Determine the heat transfer rate in the heat exchanger.
with an enthalpy of 600 Kj and velocity of 250 m/s, a 4kg of air enters a turbine. The enthalpy at exit is 395 Kj and velocity of 170m/s. What is the work developed if there is a heat loss of 10kj [ Got answer 262.2 kJ ]
Exhaust steam from the turbine enters an insulated surface condenser at the rate of 1 kg/s at a pressure of 10 kPa with an enthalpy of 2345.35 kJ/kg. Saturated liquid water leaves the condenser at a temperature of 45.81C. Find the flow of cooling water in L/min, used by the condenser if the temperature rise is 10C.
In a spray condenser, find the ratio of circulating water to steam flow if the condenser pressure is (0.01 bar), and the cooling tower cools the water to (T=12 "C). Assume turbine exhaust at (86%) quality.
A condenser takes in steam with enthalpy of 2450 kJ/kg and mass flowrate of 2 kg/s. It also discharges water at 20 kPa. What is the rate of heat removal of this system?
A heat exchanger is to heat water (cp = 4.18 kJ/kg·oC) from 25oC to 60oC at a rate of 0.2 kg/s. The heating is to be accomplished by geothermal water (cp = 4.31 kJ/kg·oC) available at 159oC at a mass flow rate of 0.3 kg/s. Find the exit temperature of geothermal water.
Air enters a blower at 20°C and exits at 28.38°C. The inlet velocities of air are 100 m/s and 150 m/s respectively. Find the mass flow rate if the blower consumes a power of 15 kW, assuming adiabaticconditions. Take cp of air is 1.005 kJ/kg-K. Need answers and solutions. ASAP...
In a spray condenser, find the ratio of circulating water to steam flow if the condenser pressure is (0.07 bar), and the cooling tower cools the water to (18"C). Assume turbine exhaust at (89%) quality.
In a heat insulated heat exchanger, hot water with 200 kPa pressure and 80 ᵒC temperature, 5 kg / s flow rate, 150 kPa pressure and 5.0068 kg / s flow rate at 10 C temperature is continuously cooled at constant pressure and as the hot water comes out from the heat exchanger at 55 ᵒC. Find the outlet temperature of cold water in ᵒC? a.50 b.35 c.40 D.45 E.30
Refrigerant flows through a water-cooled condenser at a rate of 25 kg/ min. The specific enthalpy of refrigerant entering the condenser is 400 kJ/kg, and leaving, is 220 kJ / kg. Determine the mass flow of cooling water through the condenser for a temperature increase of the water of I 0° C, assuming no external heat exchanges.
A twin-cylinder, double- acting, compressor with a clearance of 5% draws in oxygen at 450 kPa, 17°C, and discharges it at 1800 kPa. The mass flow rate is 20kg/min, compression and expansion are polytropic with n= 1.25. Find (a) the work, (b) the heat transferred, and (c) the bore and stroke for 100 rpm and L/D= 1.20. Answer: (a) -40.23 kW, (b) -829 kJ/min (c) 21.71 x 25.76 cm
Air in an air-conditioner enters at 55% RH with W = 0.021 kg/kgd.a and leaves at 22°C dry bulb and 20°C wet bulb. If mass of air is 10 kg/s, find (a) the refrigeration capacity in tons of refrigeration, (b) the quantity of water removed by the coil and (c) the by-pass factor of air-conditioner. Air pressure is 101.325 kPa