Application of the Critical Heat Flux Look-Up Table to Large Diameter Tubes

Table 2

Effect of high heat flux and tube blockage on CHF occurrence for a 67 mm vertical boiler tube.

Parameter	Base case	High heat flux case	90% tube blockage
Heat flux (KW·m^−2)	100	400	100
Pressure (kPa)	6,000	6,000	6,000
Vertical heated length (m)	10	10	10
Inlet quality to vertical tube (—)	0	0	0
Mass flux (kg·m^−2·s^−1)	1,000	1,000	100
Tube exit quality (—)	0.038	0.152	0.380
Critical heat flux (kW·m^−2)	3,262	2,760	1,580