The 172W Peltiers from Tedist has a cooling effekt@ 172W@24.6V, but 288W electricity@24.6V.
Then You easily can calculate the current consumption.
288W/24.6V = 11,71A
@price/performance the 172W peltiers are best @ 18V, because they only consume about 155W and still have 85-90% left of its cooling performance and delta.
(R = U/I)
24.6V/11.71A = 2,1ohm.
(P = U²/R)
18V²/2.1ohm = 155W
155*2 = 310W
310W/18V = 17.2A
