Adaptation of ATP to warm climates

Refrigerated transport of perishable goods in Europe is regulated by the ATP. This agreement, published in 1970, came into force in 1976 after ratification by the first five signatory countries. In fact, the ATP is designed for Central Europe. Therefore, for use in different climates (North Africa, Tropics, Ecuador, ...), you must take into account different parameters to correctly respond to different climatic conditions. The thermal load of an insulated vehicle is determined based on convective exchange with air and by direct and indirect solar radiation (radiation from surrounding flat surfaces heated by the sun). These two factors, depending on the latitude, modify the thermal balance of an insulated box compared to the situation in temperate countries. We choose 5 sample locations for which to calculate the maximum thermal load. Let's take the worst case for the thermal load: a parked vehicle, in full sun, which is affected by the irradiation of the asphalt. In hot countries (intermediate situation between Nairobi and Bamako), we should ask for a category of vehicles with a more reinforced super insulation than those currently in use. You could think of a change in pallet format allowing to increase the thickness of the insulated walls. This solution would allow to use common insulation materials (polyurethane and polystyrene) or to use native biological materials.