Question

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STEAM TABLE PROBLEMS

For problems 1-9, write the state the water is in. Calculate steam quality or degrees of superheat if applicable.

1. What is the specific volume and vapor pressure (saturation pressure) of saturated liquid at 64° C?

2. What is the specific volume and vapor pressure of saturated vapor at 174 °C?

3. What is the quality of wet steam if specific volume V= 8.35 cm3 /g at 10,703 kPa? What is the saturation temperature (dew point temperature, bubble point temperature)? What is the specific internal Energy?

4. What is the specific volume of steam at T= 200°C and P=525 kPa?

5. What is the specific volume V of steam at 9100 kPa and 560° C?

6. What is the specific enthalpy of steam at T= 550°C and P= 525 kPa?

7. What is the temperature of steam if 3600 kPa and H= 3164.2 kJ/kg? What is the specific volume?

8. What is the temperature of steam if 3600 kPa and H= 1500 kJ/kg? What is the specific volume?

9. What is the temperature and enthalpy of steam if P= 11200 kPa and V= 33 cm3 /g?

Answer 1

All the values below are diretly readfrom steam table. No calculations are required.

1. Vap pressure = -0.7738 barG, specific vol of water = 0.00101929 m3/kg

2. vap pressure = 7.7028 barG, specific vol of vapor = 0.2215 m3/kg

3. Wet steam = saturated steam,

sp vol of liquid = 0.001477 m3/kg = 1.477 cm3/gm

sp vol of vap = 0.01656 m3/kg = 16.56 cm3/gm

sat temperature = 316 deg C

4. specific vol = 0.4042 m3/kg

5. sp vol = 0.0400 m3/kg

6. sp enthalpy = 2750.28 kJ/kg

7. The temperature corresponding to these values, by method of interpolation is 380 deg C.

specific volume = 0.079105 m3/kg