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Creating the mobility of tomorrow: Climate comfort for the future of mobility

Welcome to the future of vehicle comfort: Konvekta AG presents the latest innovations in the field of air conditioning, heating systems, and heat pumps for electric buses. In an era where comfort, efficiency, and sustainability are increasingly vital, the standards for mobile air conditioning and heating solutions need redefinition. The aim of Konvekta AG is not only to provide passengers with a feel-good climate but also to assist fleet operators in equipping their vehicle fleets with forward-looking technologies. 
 

EmCO2s 2.0 - more range for the e-bus with the new heating and air conditioning system

EmCO2s 2.0 (pronounced "Emcos") is the new, emission-free heating and air conditioning network for the electric bus. With a heat pump function and the alternative refrigerant CO2, the system requires significantly less energy compared to a system with an electric heater. It is an efficient solution for temperature control in the driver's area, the passenger zones and the temperature-sensitive components of the bus, such as the battery or electrical components.
 

Operating an electric bus efficiently and economically in order to save costs or increase its range is only possible with efficient heating and cooling.

Conventional thermal management with additional electrical heating requires up to 50% of the energy available to an electric bus.

EmCO2s-Systems 2.0 uses a CO2 heat pump with patented refrigerant displacement technology, which is used for both heating and cooling the vehicle interior and critical components. This technology enables a significant reduction in energy consumption by drawing up to 75% of the required heat from the ambient air. Furthermore, the EmCO2S 2.0 system collects unused heat in the bus and stores it in two energy carrier modules.

 

Furthermore, the system is made up of many specially developed components, which together result in energy savings of over 50 %. The interaction of these technologies means that conventional heating systems, such as electric heaters or an auxiliary diesel heater, are no longer required.With advances in electromobility and innovative solutions - such as the EmCO2s System 2.0 - the vision of clean, green and quiet urban centers is taking shape.

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Sustainable air conditioning for the future: Konvekta AG relies on the natural refrigerant CO2

With a strong focus on sustainability and environmental responsibility, Konvekta AG does not use chemical refrigerants for all new developments in the field of electromobility, but the natural refrigerant CO2 (R744, carbon dioxide). CO2 is an ideal refrigerant for the use in heat pumps. Compared to conventional chemical refrigerants e.g. R134a, CO2 has a significantly higher efficiency. This means that during summer time a system using CO2 needs about 25% less energy for the same cooling capacity compared to a system using chemical refrigerants because the desired temperature is reached more quickly. CO2 damages the climate 1,430 times less in comparison to the chemical refrigerant R134aand it does not produce any environmentally harmful decomposition products. It is a naturally occurring substance and available in unlimited quantities. Compared to other naturally occurring refrigerants, carbon dioxide is neither toxic nor flammable.

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CO2 heat pump - thermal management for electric double-decker buses

Air conditioning and heating of electric or hybrid double-decker buses presents a unique challenge. These vehicles do not only have a larger interior volume, but also extend over two decks. In addition, the boarding and alighting areas are usually wider to allow passenger flow. All of this makes it difficult to distribute cold or warm air evenly. Due to the vehicle’s overall height, it is not possible to position the system on the roof.    

The optimal solution for sustainable mobility

The new CO2 heat pump air conditioning and heating system of Konvekta AG was developed especially for electric double-decker buses. It is another milestone in the mobility industry and sets new standards in efficiency, performance and environmental protection. Integral part of this technology is a compact CO2 heat pump mounted in the rear of the vehicle. This system regulates the temperature of the bus with pinpoint accuracy in hot summer and but also cold winter months. A pleasant climate for drivers and passengers without the use of environmentally harmful refrigerants, fossil fuels or an additional electric heater.

A CO2 heat pump is the smartest and most efficient heating technology in the field of e-mobility. It obtains heat not from fuel or through pure electricity, but from the ambient air. As a result, it yields a multiple of the input energy and achieves a high level of climate comfort. To generate 100% heat, the Konvekta double-decker CO2 heat pump requires only 1/3 operating power from the battery. Thus, by using natural resources, compared to electric heating, 2/3 of the energy is saved. This significantly reduces operating costs and increases the range.

With a strong focus on sustainability and environmental responsibility, Konvekta AG does not use any chemical refrigerants for this system either, but the natural refrigerant CO2 (R744, carbon dioxide).

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Extension of the product portfolio: UL 700 CO2 heat pump THERMAL MANAGEMENT

the most powerful of the Konvekta CO2 heat pump thermal management variants, the "UL 700 EM CO2 heat pump" for temperature control in electric and hybrid buses

The system is composed of various components that not only ensure temperature control of the vehicle and the batteries, but also offer a wide range of options for energy recovery and efficient energy use. The currently most powerful thermal management is the "UL 700 EM CO2 heat pump", which covers a temperature range from -20°C to + 47°C and offers optimal comfort for driver and passengers and maximum energy efficiency for the vehicle. With zero emissions, the annual energy consumption for cooling and heating is reduced by over 50%. The system obtains up to 75% (COP up to 4) of the required heat or cold from nature, not from fossil fuels or electricity - from the ambient air or through energy recovery and is therefore highly efficient.

The efficiency of the system is significantly influenced by the optimal interaction of the individual components. The Konvekta control systems are characterized by complete customization to the wishes of vehicle manufacturers and operators. The software monitors and analyzes various operating parameters of the bus in real time and adjusts the air conditioning, heating and ventilation as required. This tailor-made control unit minimizes unnecessary energy losses and thus contributes to sustainable energy efficiency.

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Patented refrigerant charge balancing technology

Patented refrigerant charge balancing technology as the latest module of CO2 heat pump thermal management

CO2 heat pump systems offer both: efficient cooling in summer and reliable heating in winter all year round. This is a major challenge, as the optimum refrigerant charge can vary depending on the heat demand, outdoor temperature or operating mode and therefore has a direct influence on the performance of the system. With the new refrigerant charge balancing module, the refrigerant charge level is precisely controlled, ensuring that the optimum amount of refrigerant is always available to the system. This increases the performance of the system in heating mode by 10% and reduces energy consumption. This saves costs and conserves environmental resources. Another advantage of refrigerant relocation is that the targeted control of the filling level means that the system always operates in an optimum range and the load on the components in the overall system is reduced. This extends the service life of the system and reduces maintenance costs.
 

Module for battery temperature control

Battery temperature significantly influences the service life and performance of electric buses. Extreme outside temperatures and temperature spikes during the charging process can stress battery packs.
Konvekta's CO2 heat pumps, equipped with the battery-temperature-control module, effectively and precisely regulate battery temperature. Energy storage devices operate within an optimal temperature range, minimizing the risk of excessive heat buildup during operation or overly low temperatures in winter.

Without reliable and constant temperature control, this can lead to accelerated battery degradation, long-term loss of capacity and lower performance, which directly affects the lifespan, range and operation of an electric bus.

Controlled temperature control minimizes these risks, increases battery life and helps to optimize the total cost of ownership. Battery temperature control therefore has a direct impact on reliability, efficiency and cost-effectiveness of electric buses.

AES - mode control module for e-buses

CO2 heat pump systems draw a large part of the required energy from the air and not from the battery. This system operates more than 50% more efficiently than an electric system. The new software add-on module, the AES mode (Additional Energy Storage), eliminates the need for an additional heater. Currently, every heat pump vehicle also has an additional electric heater to cover special temperature peaks during winter seasons and for the pre-heating process before starting in the morning.

With the new AES (Additional Energy Storage) mode module, the Konvekta CO2 heat pump system can distribute 100% of the generated energy as needed. For example, using 100% of the available heat for hot water treatment. Another advantage of the system is that it can independently take over the entire preconditioning process, even at low temperatures. Vehicles with AES therefore do not need an electric auxiliary heater.

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