Total surface area = 3/2 * area of old radiator
From the question, we have
Thermal conductivity is the same in the new and old radiators
We know that,
K = Q/A*ΔT
change in T = ΔT
Using this relation, we get
New surface area = 3/2 * area of old radiator
Heat exchanger :
The heat exchanger is a device that transfers heat from one source to another to a working fluid. In both cooling and heating processes, heat exchangers are employed. To avoid mixing, the fluids may be in direct touch or separated by a solid wall. They are frequently utilized in power plants, chemical and petrochemical plants, oil refineries, sewage treatment, air conditioning, refrigeration, and space heating. In an internal combustion engine, a circulating fluid called engine coolant circulates through radiator coils as air passes by the coils, cooling the coolant and heating the incoming air. This is a classic example of a heat exchanger in action.
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