Q = m x c x dT
Q is the heat transferred (watt/hour)
m is the mass flow rate (kg/hour)
c is the specific heat capacity (watt/kg)
dT is the change in temperature
Q= 130 watts
m = kg of water per hour (value you're looking for)
c = specific heat of water = 1.163w/1kg for water
dT = desired CPU temp(30C) – 10C = 20C
130 = m x 1.163 x 20
130 = 23.26m
m = 5.589 kg water per hour = 1.5 gallons per hour
This may seem like a very low rate. That because the assumption is that every molecule of water is used for cooling. In the real world that doesn't quite happen.
Your real benefit is that you're also enjoying a HUGE temperature differential. The best blocks generally require 1GPM to keep CPU temp within 10 degrees of the water temp. But your 20c differential gives you tons of headroom when it comes to flow rate.
If you look at the interactive waterblock test results at ProCooling.com, and extend the curves of the waterblocks towards the low-flow end of the chart, you’ll realize that you have to reach some pretty darn slow flow rates to get a differential of 20C. My barely edjumacated guesstimate would be that a Storm block would need about 5 GPH to give you a 20C differential, keeping you CPU at 30C.
365 x 24 x 5 x 0.1336806 x .10 = 585 dollars
Seems a bit pricey, no?