Natural Gas Sensible Heat Duty at Constant Pressure

 
By 20 January 2016
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The sensible heat duty for natural gas at constant pressure is:

cal-2-14

Heat capacity is determined at atmospheric conditions and then corrected for temperature and pressure based on reduced pressure and temperature.

cal-2-15

The gas pseudo critical pressures and temperatures can be approximated from Figure 2-16 or they can be calculated as weighted averages of the critical temperatures and pressures of the various components on a mole fraction basis. Table 2-10 shows a calculation for the gas stream in our example field.

15. Heat capacity correction factor. (From Chemical Engineer's Handbook, 5m Edition, R. Perry and C. Chilton, McGraw-Hill Co., © 1973.)

Pseudo critical properties of natural gases. (From Gas Processors Suppliers Association, Engineering Data Handbook, 9th Edition.}

For greater precision, a correction for H2S and CO2 content may be required. Refer to the Gas Processors Suppliers Association’s Engineering Data Book or other text for a correction procedure.

table-2-10