A feedwater heater operates at steady state with liquid water entering at inlet 1 at 7 bar, 42C, and a mass flow rate of 70 kg/s. A separate stream of water enters at inlet 2 as a two-phase liquid–vapor mixture at 7 bar with a quality of 98%. Saturated liquid at 7 bar exits the feedwater heater at 3. Ignoring heat transfer with the surroundings and neglecting kinetic and potential energy effects, determine the mass flow rate, in kg/s, at inlet 2.

18.76kg/s

Explanation:

From our data, we have:

The steady-state mass rate rate equation gives

The steady-state energy balance gives;

#Neglect heat transfer and KE and PE effects

#Substitute for from the mass rate balance:

Inlet 1: water is a compressed liquid. From Table A-2,

inlet 2,steam is super-heated. From Table A-4,

inlet 3: water is a saturated liquid. From A-3 table,

Substitute values in to find the mass flow rate at inlet 2:

Hence, the mass flow rate at inlet 2 is 18.76kg/s

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever