Pressure-Temperature Relationship for Steam
EXPERIMENT-1
Pressure-Temperature Relationship for Steam
OBJECT: The objective of this experiment is to determine the relationship between saturation pressure and saturation temperature of the wet steam.
APPARATUS: Pressure-temperature apparatus with pressure gauge and thermometer.
[pic]
THEORY:
In order to determine the relationship between the saturation temperature and pressure of wet steam it is necessary to obtain a number of corresponding values of the two variables and to plot a graph.
PROCEDURE: 1. Connect the unit to the steam supply and open the stop valve on the inlet side. 2. Throttle the outlet from the cylinder to the desired pressure and allow a period of time to elapse to obtain steady state conditions. 3. Record the steam temperature and pressure. 4. Adjust the steam pressure using the throttle valve, and allow sufficient time to elapse to obtain steady state condition. 5. Record the steam pressure and temperature. 6. Repeat this procedure until the maximum pressure is reached. 7. Take a further set of readings with reducing pressure allowing time at each stage to reach steady state conditions.
RESULTS AND CALCULATIONS:
Plot graphs of temperature (y-axis) against absolute pressure (x-axis) for
a) Pressure increasing
b) Pressure decreasing
c) Steam table values for the range of pressure used
Absolute pressure = Atmospheric pressure + Gauge pressure
Atmospheric pressure = 1 bar
|PRESSURE (bar) |TEMPERATURE oC |
|Increasing |Decreasing |Steam Table |Increasing |Decreasing |Steam Table |
|Gauge |Absolute |Gauge |Absolute |Absolute |oC |oC |oC |
| | | | | | |
Pressure-Temperature Relationship for Steam
OBJECT: The objective of this experiment is to determine the relationship between saturation pressure and saturation temperature of the wet steam.
APPARATUS: Pressure-temperature apparatus with pressure gauge and thermometer.
[pic]
THEORY:
In order to determine the relationship between the saturation temperature and pressure of wet steam it is necessary to obtain a number of corresponding values of the two variables and to plot a graph.
PROCEDURE: 1. Connect the unit to the steam supply and open the stop valve on the inlet side. 2. Throttle the outlet from the cylinder to the desired pressure and allow a period of time to elapse to obtain steady state conditions. 3. Record the steam temperature and pressure. 4. Adjust the steam pressure using the throttle valve, and allow sufficient time to elapse to obtain steady state condition. 5. Record the steam pressure and temperature. 6. Repeat this procedure until the maximum pressure is reached. 7. Take a further set of readings with reducing pressure allowing time at each stage to reach steady state conditions.
RESULTS AND CALCULATIONS:
Plot graphs of temperature (y-axis) against absolute pressure (x-axis) for
a) Pressure increasing
b) Pressure decreasing
c) Steam table values for the range of pressure used
Absolute pressure = Atmospheric pressure + Gauge pressure
Atmospheric pressure = 1 bar
|PRESSURE (bar) |TEMPERATURE oC |
|Increasing |Decreasing |Steam Table |Increasing |Decreasing |Steam Table |
|Gauge |Absolute |Gauge |Absolute |Absolute |oC |oC |oC |
| | | | | | |