Articles and Posts

Refrigerated transport specifications obsess over solar radiation from above while completely ignoring the 70°C heat source below. South African trucks operate on pavement surfaces 20-30°C hotter than ambient air, yet floor insulation is consistently half that of roofs. The physics is simple, but the industry won’t calculate the cost.

Your fixed-speed compressor wastes 40% of its energy on crude thermostat control. Variable-speed DC systems save R12,500/year. Here’s why you can’t buy one.

Automatic defrost control system that activates on fixed time intervals regardless of actual ice accumulation, wasting 60% of defrost energy through inappropriate scheduling.

The heat exchanger where high-pressure, high-temperature refrigerant gas from the compressor releases heat to the atmosphere, condensing back into liquid for the next refrigeration cycle. The condenser is where heat…

Everyone assumes larger condensers create more drag. They’re wrong. Behind every courier truck cab sits a 1.4-2.0m² flat loadbox wall creating massive drag (C_d ~1.15). Small condensers cover only 20% of it. Large horizontal condensers covering 70-90% act as integrated fairings, SAVING R2,751-R3,528/year in aerodynamic drag—while providing 50-100% more cooling capacity. The loadbox wall is the problem. Large condensers are the solution. Net benefit: R12,751-R15,528/year (aerodynamics + thermodynamics). Payback: 7-13 months.

Small form factor condensers waste 60% of your mounting space. Ram air can’t save undersized coils at courier speeds. Use the space you paid for.

R448A delivers 11% more capacity than R404a at altitude with 65% lower GWP and 2-3 year payback. But the industry pushes R290 and CO₂ that perform worse in South African conditions.

Composite refrigerated bodies offer 340kg weight savings, eliminate thermal bridges, and last 20+ years in coastal service. So why are bodybuilders still riveting aluminum like it’s 1975?

VIP insulation delivers 5-10× better thermal performance than polyurethane, offering R60k+ lifecycle savings or 300kg extra payload. So why are bodybuilders still quoting 75mm foam from 1985?