Homework Answers
By using steam table calculator We can get the answer.
For the first one, enthalpy of steam is 1440.9 BTU/LB.
For the 2nd one,
Change in enthalpy = 1373-1200.1 = 172.9 BTU/Lb. Option 1 is correct.
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questioni 211 point) Javea What is the enthalpy of steam at 1200 psia and 900°F? 567.26...
what is the quality of steam at 400 psia if the enthalpy of the steam is...
what is the quality of steam at 400 psia if the enthalpy of the steam is 600 Btu/ Ibm
A boiler is at a pressure of 80 psia. Use steam tables for sea level. (i)...
A boiler is at a pressure of 80 psia. Use steam tables for sea level. (i) At what temperature does the water boil?(ii) How much heat input ( in Btu/hr) is required to heat 20 pounds per hour of water from 70 F to this boiling point? (iii) How much heat input (in Btu/hr) is needed to convert 20 pounds per hour of water from 70 F into saturated steam at 80 psi pressure?( iv) How much heat input (in...
Problem A: 15 Ibm of saturated vapor steam at 10 psia is contained in a frictionless...
Problem A: 15 Ibm of saturated vapor steam at 10 psia is contained in a frictionless piston-cylinder arrangement. The steam is heated at constant pressure to 400° F. a. Calculate the work done by the steam on the piston, in BTUS. b. Calculate the amount of heat delivered to the steam for this process, in BTUS. c. Determine the change in internal energy of the steam, in BTUs.
14. Steam enters an adiabatic turbine at 1,000 psia and 900°F and leaves at 3 psia....
14. Steam enters an adiabatic turbine at 1,000 psia and 900°F and leaves at 3 psia. The turbine efficiency is 80%. The steady-state specific work (Btumn) developed by the turbine is most nearly (a) 290 (b) 325 (e)390 (d)409 (e) 490
1. An industrial plant needs 20,000 lbm of saturated steam at 280°F per hour for heating...
1. An industrial plant needs 20,000 lbm of saturated steam at 280°F per hour for heating purposes and ten MW of electrical power. A small turbine system is to be designed to handle both of these needs. Steam is supplied to a turbine at 400 psia pressure from a boiler and expanded until 280°F saturated steam is obtained whereupon the steam needed for heating is extracted. The rest of the steam is expanded in a second turbine to a condenser...
A boiling water reactor had the following characteristics: System pressure 1,090 psia Saturated steam production rate...
A
boiling water reactor had the following characteristics:
System pressure 1,090 psia
Saturated steam production rate 1.5x10^7 lb/hr
Average exit void fraction 38.5%
Slip ratio 1.92
Feed water temperature 285oF
Determine the following:
1) The enthalpy of subcooling.
2) Degree of subcooling
3) Total heat generated by the reactor
Question 2 (20%) A boiling water reactor has the following characteristics: System pressure Saturated steam production rate 1.5 x 10 lb/hr Average exit void fraction Slip ratio Feedwater temperature 1,090 psia...
7.10. Steam expands adiabatically in a nozzle from inlet conditions of 130(psia), 420(°F), and a velocity...
7.10. Steam expands adiabatically in a nozzle from inlet conditions of 130(psia), 420(°F), and a velocity of 230(ft)(s)−1 to a discharge pressure of 35(psia) where its velocity is 2000(ft)(s)−1. What is the state of the steam at the nozzle exit, and what is Sg for the process?
Why question3 is P Why H was independent of P Use of Tabulated Enthalpy Data The...
Why question3 is P
Why
H was independent of P
Use of Tabulated Enthalpy Data The following entries are taken from a data table for saturated methyl chloride: TCF P(psia) V(ft /lb H(Btu/lbm) State Liquid -40 6.878 0.01553 0 18.90 4.969 50 51.99 0.000 196.23 Vapor Vapor 202.28 1.920 1. What reference state was used to generate the given enthalpies? culate Afi and AU for the transition of saturated methyl chloride vapor from 50°F to O'F 3. What assum enthalpy?...
2. (60 points) Water that is flowing in a pipe at 25 psia and 200 °F...
2. (60 points) Water that is flowing in a pipe at 25 psia and 200 °F at a rate of 1900 lbm/hr (state 1), cools down to 20 psia and 110 °F (state 2). Then it is mixed with a stream of water at a rate of 1000 lbm/hr at 20 psia and 240 °F (state 3). The mixing process is constant pressure (P2=P;-P) and adiabatic. Find the heat transfer rate from the water (0) and final enthalpy and temperature...
(30 pts.) 3) Steam enters an adiabatic turbine at 1400 psia and 1000 F at a...
(30 pts.) 3) Steam enters an adiabatic turbine at 1400 psia and 1000 F at a flow rate of 31.5 cfm. It exits at a quality of 90% and a pressure of 1 psia. Neglect kinetic and potential energy effects. a) Determine the power produced [hp] b) Draw P-v and T-v state diagrams showing the states and process.
Problem A: 15 Ibm of saturated vapor steam at 10 psia is contained in a frictionless piston-cylinder arrangement. The steam is heated at constant pressure to 400° F. a. Calculate the work done by the steam on the piston, in BTUS. b. Calculate the amount of heat delivered to the steam for this process, in BTUS. c. Determine the change in internal energy of the steam, in BTUs.
14. Steam enters an adiabatic turbine at 1,000 psia and 900°F and leaves at 3 psia. The turbine efficiency is 80%. The steady-state specific work (Btumn) developed by the turbine is most nearly (a) 290 (b) 325 (e)390 (d)409 (e) 490
1. An industrial plant needs 20,000 lbm of saturated steam at 280°F per hour for heating purposes and ten MW of electrical power. A small turbine system is to be designed to handle both of these needs. Steam is supplied to a turbine at 400 psia pressure from a boiler and expanded until 280°F saturated steam is obtained whereupon the steam needed for heating is extracted. The rest of the steam is expanded in a second turbine to a condenser...
A
boiling water reactor had the following characteristics:
System pressure 1,090 psia
Saturated steam production rate 1.5x10^7 lb/hr
Average exit void fraction 38.5%
Slip ratio 1.92
Feed water temperature 285oF
Determine the following:
1) The enthalpy of subcooling.
2) Degree of subcooling
3) Total heat generated by the reactor
Question 2 (20%) A boiling water reactor has the following characteristics: System pressure Saturated steam production rate 1.5 x 10 lb/hr Average exit void fraction Slip ratio Feedwater temperature 1,090 psia...
Why question3 is P
Why
H was independent of P
Use of Tabulated Enthalpy Data The following entries are taken from a data table for saturated methyl chloride: TCF P(psia) V(ft /lb H(Btu/lbm) State Liquid -40 6.878 0.01553 0 18.90 4.969 50 51.99 0.000 196.23 Vapor Vapor 202.28 1.920 1. What reference state was used to generate the given enthalpies? culate Afi and AU for the transition of saturated methyl chloride vapor from 50°F to O'F 3. What assum enthalpy?...
2. (60 points) Water that is flowing in a pipe at 25 psia and 200 °F at a rate of 1900 lbm/hr (state 1), cools down to 20 psia and 110 °F (state 2). Then it is mixed with a stream of water at a rate of 1000 lbm/hr at 20 psia and 240 °F (state 3). The mixing process is constant pressure (P2=P;-P) and adiabatic. Find the heat transfer rate from the water (0) and final enthalpy and temperature...
(30 pts.) 3) Steam enters an adiabatic turbine at 1400 psia and 1000 F at a flow rate of 31.5 cfm. It exits at a quality of 90% and a pressure of 1 psia. Neglect kinetic and potential energy effects. a) Determine the power produced [hp] b) Draw P-v and T-v state diagrams showing the states and process.
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