Construct · 1 fields · 1 citations

enthalpy: a standalone construct

One name. One construct. A landmark on the map.

● anchor · a standalone thermodynamics construct Nearest construct by meaning·not indexed
enthalpy1 CONSTRUCTEnthalpyÇENGEL · U + PV

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Thermodynamics

a state property equal to internal energy plus pressure times volume, whose change is the heat exchanged at constant pressure.

In thermodynamics enthalpy is a state property defined as a system's internal energy plus the product of its pressure and volume (H = U + pV); its change equals the heat exchanged in a constant-pressure process, which makes it the natural accounting variable for flow devices, heat exchangers, and combustion. Çengel and Boles's Thermodynamics: An engineering approach introduces enthalpy and its central role in energy balances for open systems. The referent is an energy-dimensioned state function, read from property tables or psychrometric and refrigerant charts, and it underlies the heat-flow bookkeeping of nearly every HVAC and refrigeration calculation.[1]

Unit
Energy, or energy per unit mass for specific enthalpy (e.g., kJ/kg)
Recovery means
Not applicable
Measured by
Read from property tables, psychrometric charts, or refrigerant p–h diagrams; differences drive steady-flow energy balances

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Nearby constructs

superheat2 fields · 3 citationsjingle · one word, two statessubcooling1 fields · 2 citationsanchor · a standalone refrigeration construct

References

  1. Çengel, Y. A., & Boles, M. A. (2011). Thermodynamics: An engineering approach (7th ed.). McGraw-Hill. ISBN 9780071072540

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