Question

A mixing chamber receives a steady flow of water from different parts of a processing plant. It has two inlets and one outlet. The mixing chamber is NOT well insulated and DOES allow heat transfer between the device and the surroundings. Kinetic and potential energy effects are negligible. Determine the mass flow rate at inlet 1 in [kg/s]. Determine the rate of heat transfer between the mixing chamber and the surroundings in [kW]; carefully indicate direction (i.e., does energy move by heat transfer to or from the chamber

Answer 1

Answer:

hello your question has some missing information attached below is the missing information

answer :

a) 9.17431 kg/s

b) 2598.4374 kW

Explanation:

a) Calculate mass flow rate at inlet 1

Given data :

AV1 = 0.01 m^3/s

pressure ( P1 ) = 5 bar , temp ( T1 ) = 150°C

therefore : m1 = AV1 / v1 ------ ( 1 )

where : v1 = 0.00109 m^3/kg  ( value gotten from compressed table )

back to equation 1

m1 =  ( 0.01 m^3/s  / 0.00109 m^3/kg )  = 9.17431 kg/s

b) Calculate the rate of heat transfer

first determine mass balance

m3 = m1 + m2  

     = 9.17431 + 19 = 28.17431 kg/s

apply the energy balance equation to determine the rate of heat transfer

m1*h1 + m2*h2 = m3*h3 + Q

∴ Q = m1*h1 + m2*h2 - m3*h3 ------------ ( 1 )

where :

h1 = 632.266 kJ/kg  value gotten from compressed water table

h2 = 2812.45 kJ/kg  value gotten from superheated steam table

h3 = 2010.2965 kJ/kg value gotten from saturated pressure table

input values into equation 1 above

Q = 2598.4374 kW  . the energy moves from the chamber to the surroundings