Engineering, 29.01.2020 05:40 jumpman2344

An insulated open feedwater heater (mixing box) is used in a steam power plant to raise the temperature of the water going into the boiler which increases the thermal efficiency. the water exits the feedwater heater as a saturated liquid at p6 with a mass flow rate of m6. the two inlets to the feedwater heater are both at a pressure of p6. the first inlet has a temperature of t3 and second at a temperature of t5. determine the following given the properties listed below.
--given values--

p6 (bar) = 5
m6 (kg/s) = 72
t3 (c) = 281
t5 (c) = 65

1. determine the specific enthalpy (kj/kg) at the feedwater heater exit.
your answer =
2. determine h3, the specific enthalpy (kj/kg) at the first feedwater heater inlet.
your answer =
3. determine h5, the specific enthalpy (kj/kg) at the second feedwater heater inlet.
your answer =
4. determine m3, the mass flow rate (kg/s) at the first feedwater heater inlet.
your answer =
5. determine m5, the mass flow rate (kg/s) at the second feedwater heater inlet.
your answer =

Answers: 1

Show answers

Another question on Engineering

Engineering, 03.07.2019 14:10

If the thermal strain developed in polyimide film during deposition is given as 0.0044. assume room temperature is kept at 17.3 c, and thermal coefficient of expansion for the film and the substrate are 54 x 10^-6c^-1 and 3.3 x 10^-6c^-1respectively. calculate the deposition temperature.

Answers: 3

Answer

Engineering, 04.07.2019 18:10

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk

Answers: 1

Answer

Engineering, 04.07.2019 18:10

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.

Answers: 1

Answer

You know the right answer?

An insulated open feedwater heater (mixing box) is used in a steam power plant to raise the temperat...

Questions