Explanation Given: Mass flow rate of R-410A in first line is 2 kg/s . Pressure at inlet of R-410A in first line is 1 MPa . Temperature of R-410A in first line is 40 ° C . Mass flow rate of R-410A in second line is 1 kg/s . Temperature of R-410A in second line is 15 ° C . Quality of steam of R-410A in second line is 50 % . Pressure of outgoing flow is 1 Mpa . Temperature of outgoing flow is 60 ° C . Concept used: Write the expression for specific enthalpy of ammonia in second line. h 2 = h f + x h f g ..........(1) Here, h 2 is the specific enthalpy of R-410A in second line, h f is the enthalpy of saturated liquid R-410A at 40 ° C and h f g is the specific enthalpy of evaporation at 40 ° C . Write the expression for conservation of mass. m ˙ 3 = m ˙ 1 + m ˙ 2 ..........(2) Here, m ˙ 3 is the mass flow rate at exit, m ˙ 1 is the mass flow rate of R-410A at inlet of first line and m ˙ 2 is the mass flow rate of R-410A in second line. Write the expression for energy balance at point of mixing. m ˙ 1 h 1 + m ˙ 2 h 2 + Q ˙ = m ˙ 3 h 3 ..........(3) Here, h 1 is the specific enthalpy of R-410A in first line, h 3 is the specific enthalpy at exit and Q ˙ is the rate of heat transfer to mixing chamber. Calculation: Refer to Table B.4.2 “Properties of Superheated R-410A” to obtain the specific enthalpy at 1 MPa and 40 ° C as 316.05 kJ/kg and specific enthalpy at 1 MPa and 60 ° C as 335

9th Edition

ISBN: 9781119321453

Author: Sonntag

Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT

See similar textbooks

Videos

Question

Chapter 4, Problem 4.85P

To determine

The rate of heat transfer to mixing chamber.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 4, Problem 4.84P

Chapter 4, Problem 4.86P

Students have asked these similar questions

9. An air compressor takes in air at 105 Pa and 27°C having volume of 1.5 m3/kg and compresses it to 4.5×105 Pa. Find the work done, heat transfer and change in internal energy if the compression is isothermal.

During an isentropic process of 3 lb/sec of air, the temperature increases from 50 deg F to 290 deg F. Find the work for a nonflow process.

A mixing chamber with heat transfer receives 2 kg / s of R - 134a at 1 MPa, 50 ° C in one line and 1 kg / s of R - 134a at 15 ° C, quality 40% in a line with a valve. The outgoing Now is at 1 MPa, 70 ° C Find the rate of heat transfer to the mixing chamber

Chapter 4 Solutions

EBK FUNDAMENTALS OF THERMODYNAMICS, ENH

Ch. 4 - A temperature difference drives a heat transfer...Ch. 4 - What is the effect can be felt upstream in a flow?Ch. 4 - Prob. 4.3P Ch. 4 - Air at 500 kPa is expanded to l00 kPa in two...Ch. 4 - A windmill takes out a fraction of the wind...Ch. 4 - An underwater turbine extracts a fraction of the...Ch. 4 - A liquid water turbine at the bottom of a dam...Ch. 4 - You blow a balloon up with air. What kinds of work...Ch. 4 - Storage tanks of cryogenic liquids (O2,N2,CH4) are...Ch. 4 - A large brewery has a pipe of cross-sectional area...

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

The rate of heat transfer to mixing chamber.

Solution Summary: The author explains the rate of heat transfer to mixing chamber and the expression for specific enthalpy of ammonia.

Videos

The rate of heat transfer to mixing chamber.

Want to see the full answer?

Chapter 4 Solutions