[buffalobillpatrick]

Q = (k A/x) (T1 – T2)

where:

Q = Heat transfer, BTU/hr,

k = Thermal conductivity, BTU/in/ft 2/hr/°F

.38 W/MK for HDPE @50*C,

convert to BTU/in/ft 2/hr/°F multiply by 6.934

.38 x 6.934 = 2.635 BTU/in/ft 2/hr/°F

A = Heat transfer area, in ft2

275gal IBC tote with 4 sides + bottom in contact with water = aprox. 50 ft2

x = Wall thickness, inches = .125"

50 x .125 = 400

T1 = Outside temperature, °F = using 150*F example
T2 = Inside temperature, °F = using 100*F example, thus 50* delta

2.635 x 400 x 50 = 52,700 btu/hr

This ignores many factors, such as thermal conductivity of paraffin in solid state & liquid state, water circulation, etc. etc.

But, I would be good with 10K btu/hr as this transfer would continue 24/7

+ I can add to water rotation with a tiny El_Sid 3gpm 28vdc pump that I have. 24/7

BBP