Performance Investigation of O-Ring Vacuum Membrane Distillation Module for Water Desalination

Table 4

The effect of the feed flow rate on the heat transfer coefficient, surface temperature, and temperature polarization coefficient at 55 and 65°C and a constant vacuum level of 92 kPa.

Feed flow rate () (mL/s)	Re	55°C			65°C
		(W/m^2 K)	(°C)	TPC	(W/m^2 K)	(°C)	TPC
7.7	78315	1420.1	51.7	0.94	1475.6	60.7	0.93
16.6	165784	2587.5	52.3	0.95	2688.6	61.3	0.94
27	274612	3874.5	52.7	0.96	4026.0	61.6	0.95
30.3	311226	4282.5	53.2	0.97	4450.0	62.0	0.96