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**Lesson 6 PROPERTY DIAGRAMS AND STEAM TABLES**

DETERMINE any unknown properties for a fluid given a Mollier diagram and sufficient information to indicate the state of the fluid. DETERMINE any unknown properties for a fluid, given a set of steam tables and sufficient information to indicate the state of the fluid. DETERMINE the change in the enthalpy of a fluid as it passes through a system component, given the state of the fluid at the inlet and outlet of the component and either steam tables or a Mollier diagram.

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**Property Diagrams Pressure- Temperature (P-T) diagrams**

Pressure-Specific Volume (P-v) diagrams Pressure-Enthalpy (P-h) diagrams Enthalpy-Temperature (h-T) diagrams Temperature-Entropy (T-s) diagrams Enthalpy-Entropy (h-s) or Mollier diagrams.

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**Pressure- Temperature (P-T) diagram**

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**Pressure-Specific Volume (P-v) Diagram**

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**Pressure-Enthalpy (P-h) Diagram**

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**Enthalpy-Temperature (h-T) Diagram**

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**Temperature-Entropy (T-s) Diagram**

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**Enthalpy-Entropy (h-s) or Mollier Diagram**

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**Steam Tables Saturated steam tables Superheated steam tables**

Both sets of tables are tabulations of pressure (P), temperature (T), specific volume (v), specific enthalpy (h), and specific entropy (s)

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**Saturated Steam Tables**

Provide energy transfer properties of saturated water and saturated steam for temperatures from 32 to °F (the critical temperature) and for the corresponding pressure from to psi. Divided into two parts: Temperature Tables – Lists properties according to saturation temperature (Tsat) Pressure Tables - Lists properties according to saturation pressure (Psat).

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**Property Diagrams and Steam Tables Summary**

The Mollier diagram can be used to determine various properties of a fluid. Mollier diagram is an h versus s plot. Can only be used when quality is greater than 50% and for superheated steam. Contains a series of constant temperature, constant pressure, constant moisture content, and constant superheat lines.

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**Property Diagrams and Steam Tables Summary (continued)**

The steam tables can be used to determine various properties of water using the following equations.

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**Property Diagrams and Steam Tables Summary (continued)**

The change in enthalpy of a fluid as it passes through a component can be determined using a Mollier diagram on steam tables.

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