TELP - aerodynic elements to reduce diese consumption

TELP is a passive aerodynamic add-on for trucks and other commercial vehicles. It consists of shaped flow elements that you retrofit at selected spots on the vehicle to smooth turbulent airflow, which in turn reduces drag, fuel use, and CO₂. I

How it works — in plain terms

• Turbulence control: The elements are profiled vanes/ridges that condition the boundary layer and calm the wake around the vehicle body (e.g., cab–trailer gap, edges, underbody). That reduces pressure drag caused by flow separation.

• Passive system: No sensors or moving parts; once installed, TELP generates a local low-pressure/guided flow that “pulls” the air more smoothly off the vehicle surfaces.

• Retrofit & multi-platform: Intended for trucks, vans, and utility vehicles; installation is simple and benefits are observed from the first kilometers (per vendor).

Why fleets use it

• Lower fuel consumption & CO₂ via less aerodynamic drag (the dominant loss at highway speeds).

• Quick deployment: vendor highlights straightforward installation and rapid payback in field trials. Te

Mounting zones (priority order)

1. Cab–trailer gap (leading edges of the trailer + cab rear corners)
   Purpose: tame the shear layer in the tractor–trailer gap and delay separation. Biggest bang-for-buck area on artics.
   Place TELP elements in short rows along the vertical rear cab edges and the front vertical edges of the trailer.

2. Trailer rear perimeter (left/right vertical edges, roof trailing edge)
   Purpose: reduce base-drag in the wake; complements any boat-tail/curtains.
   Place TELP arrays near the trailing edges to condition the boundary layer before it detaches.

3. Cab roof front / A-pillars and roof side edges
   Purpose: guide flow over the roof and into the gap; helps in cross-winds.

4. Side skirts & underbody leading edges
   Purpose: keep under-car flow attached and reduce turbulence under the chassis.

5. Chassis attachments that trip the flow (steps, tanks, battery boxes)
   Purpose: local separation control; use small clusters to “soften” flow around protrusions.

6. Savings estimator (useful ranges)

guidance: field testing indicates up to ~1.5 L/100 km fuel reduction for heavy trucks (pilot phase). TELP markets annual savings “up to EUR 2,800 per vehicle” as an orientation.

Use this quick range for planning:

• Conservative: 0.8 L/100 km (mixed routes, partial mounting)

• Upper: 1.5 L/100 km (highway-dominant, good mounting coverage)

Assume diesel €1.60/L (typical EU fleet planning value).

Computation (example 120,000 km @ 0.8–1.5 L/100 km):
Liters saved = km × (saving/100).
120,000 × 0.8/100 = 960 L → × €1.60 ≈ €1,536;
120,000 × 1.5/100 = 1,800 L → × €1.60 ≈ €2,880

Amortisation of the investment of TELP of 1 year to 1,8 years