Research Article

Experimental Investigation of Heat and Mass Transfer in Tubular Membrane Distillation Module for Desalination

Table 2

Analysis of heat transfer of the system.

𝑇 𝑓 ∘ 𝐶 Heat flux, W/m2
𝑄 𝑓 = 𝑄 𝑝 = 𝑄 𝑣 + 𝑄 𝑐
𝑈
W / m 2 K
𝑄 𝑇 = 𝑈 Δ 𝑇 𝑓
W/m2
Heat transfer resistance, m 2 K / W
1 / ℎ 𝑓 [ 1 / ( ℎ 𝑚 + ( 𝐜 𝑚 Δ 𝐻 𝑣 ) / ( 𝑇 f m − 𝑇 p m ) ) ]

Pure water

405, 2 5 7 = 1 , 3 6 3 + 3 ,894326.505,257 6 . 3 2 × 1 0 − 5 2 . 9 3 × 1 0 − 3
508, 7 6 6 = 2 , 7 1 3 + 6 ,053348.568,766 5 . 9 6 × 1 0 − 5 2 . 7 5 × 1 0 − 3
6011, 7 1 5 = 3 , 9 5 5 + 7 7 6 0 362.1211,715 5 . 7 1 × 1 0 − 5 2 . 6 4 × 1 0 − 3
7016, 2 6 0 = 6 , 3 2 7 + 9 ,933390.4016,260 5 . 4 3 × 1 0 − 5 2 . 4 5 × 1 0 − 3

Aqueous NaCl, 1000 mg/L

404, 3 9 7 = 7 1 5 + 3 ,682282.764,397 1 . 0 9 × 1 0 − 4 3 . 3 2 × 1 0 − 3
507, 2 1 7 = 1 , 3 5 7 + 5 ,860291.017,217 1 . 0 1 × 1 0 − 4 3 . 2 3 × 1 0 − 3
609, 6 0 3 = 2 , 0 8 8 + 7 ,515301.039,603 9 . 7 1 × 1 0 − 5 3 . 1 2 × 1 0 − 3
7013, 0 2 8 = 3 , 4 1 8 + 9 ,610317.3713,028 9 . 4 3 × 1 0 − 5 2 . 9 6 × 1 0 − 3

Aqueous NaCl, 3000 mg/L

404, 3 2 9 = 6 4 8 + 3 ,681277.504,329 1 . 1 4 × 1 0 − 4 3 . 3 7 × 1 0 − 3
507, 0 8 5 = 1 , 2 9 0 + 5 ,795288.017,085 1 . 0 6 × 1 0 − 4 3 . 2 5 × 1 0 − 3
609, 4 9 5 = 2 , 0 6 2 + 7 ,433299.999,495 1 . 0 1 × 1 0 − 4 3 . 1 2 × 1 0 − 3
7012, 8 0 1 = 3 , 3 4 5 + 9 ,456316.0812,801 9 . 7 2 × 1 0 − 4 2 . 9 6 × 1 0 − 3

Aqueous NaCl, 5000 mg/L

404, 1 4 2 = 5 6 0 + 3 ,582271.604,142 1 . 2 3 × 1 0 − 4 3 . 4 2 × 1 0 − 3
506, 9 4 9 = 1 , 2 3 0 + 5 ,719284.786,949 1 . 1 3 × 1 0 − 4 3 . 2 7 × 1 0 − 3
609, 2 7 3 = 1 , 8 9 4 + 7 ,378293.909,273 1 . 0 7 × 1 0 − 4 3 . 1 7 × 1 0 − 3
7012, 3 3 0 = 2 , 9 5 2 + 9 ,377305.9412,330 1 . 0 4 × 1 0 − 4 3 . 0 5 × 1 0 − 3