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in Development

Concept, Creation, Completion – Three Tiers of our Product Development

Four centers of excellence for manifold requirements

From four competency focuses, our products, systems, and development tools arise for proper layout and validation in accordance with the wishes of our long-term and high-expectation customers, which serve premium markets in the world of mobility for persons as well as goods – from bus, across municipal vehicles, rail, military, through to construction, agricultural, and forestry machinery.

Our vision is to offer solutions, which, at unique levels of component performance, combine the value of long product life spans with low costs. At the systems level, to offer intelligent integration, pairing ultimate comfort for end-users with high-efficiency for the vehicles to go further than before. This vision is best defined by our leading slogan “e4c – efficiency for comfort”.

Reference example “heat pump system for electric buses”

The development of our heat pump system for electric buses proves this in many ways. At 0-emissions, we reduce the energy requirements for heating, for example, at -10°C (14°F) by about 60 % as compared with traditional sources like direct electrical heat. This leads to an increase in overall driving distance on a single-charge by about 40 % when in heating mode. Moreover, the energy requirement across an entire year, including cooling, is also reduced by about 25 %.

We enable this by enabling our heat pump to not be controlled by simple heating and cooling modes. Rather, we vary the system function with our so-called “Two Way Chiller” on the waterside. The desired heat energy will be transferred via either cold or warm water to the passenger space, and conversely into the atmosphere outside the bus. Very high COP-values are achieved using an optimal heat exchanger with powerful heating and cooling characteristics coupled with a fully integrated, desire-oriented control of all actuators.

We are proud to develop the complex software required for such undertakings ourselves, and to also manufacture the electronic hardware in-house. In the next development stage in 2023, the Borealis heat pump will be optimized:

  • 50 kg lighter
  • 100 mm slimmer aerodynamic profile
  • 20 dB quieter
  • 10 % improved performance at an even better energy efficiency
  • Natural coolant source with about 1.5 kg R290 for a 12m bus
  • Integrated thermal management package featuring waste heat recovery and battery cooling
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