Heat & Fluid Flow Rates In A Radiator

Assume the heat energy leaving the radiator is about equal to the
mechanical energy leaving the crank.

An 80 hp engine would need to sink 60 kW or 60 BTUs/sec which means
the flow rate from the pump in lbs/sec times the F temp drop in the
radiator =

(lbs/sec) X (delta T) = 60

What are typical water pump rates for an 80 hp engine?

How much does the radiator cool the water?

Guessing wildly, the water pump does 10 gallons/minute or 1.43 lbs/sec
so the temperature drop from the radiator inlet to outlet is 40
degrees.


Bret Cahill