Total heat load to the truck Cabin is 2.8 kW therefore a cooling system of 1 TR (3.5kW) should be sufficient.
A transport truck of 150 B H P is considered and the heat available in exhaust is 50 kW and cooling water = 45 kW (Engine running at 50% of maximum power.)
Heat required for 1 TR with COP 0.2 =17.5 kW. It is very clear that available heat potential is sufficient and engine cooling water can run the proposed cooling system