Energy Efficiency

The increased efficiency of CAREL’s conditioning and refrigeration systems is one of its cornerstones. In addition to its move towards less energy intensive systems, CAREL also pays close attention to their power supply. The transition from traditional gas or fossil fuel heating systems to electric pump solutions should allow for the better use of renewable sources. The main new designs and innovations of recent years of HVAC/R technologies have led to:

  • optimisation of refrigeration systems and circuits;
  • introduction of variable speed compressors using BLDC technology, facilitating greater efficiency in applications like heat pumps;
  • specific devices for CO2 refrigerant applications making the systems more efficient and extending the use of these applications in hotter geographical areas;
  • the Heez system, which was then used to build the most efficient bottle cooler integrated control system in the world. It is a variable speed propane application that allows beverage distribution applications to reduce their environmental impact.

The ongoing development of these activities has also allowed CAREL to maintain its competitive edge on the global market for the introduction of new technologies for the HVAC/R sector. It has obtained numerous awards from the most important sector bodies such as, for example, the AHR refrigeration award from ASHRAE in 2016 for the HEOS system and the World Beverage Innovation Award for Heez during the Drinktec 2017 exhibition.

CAREL not only optimises systems but also designs solutions that allow system optimisation like the HEOS (High Efficiency Showcase) system, where supermarket refrigeration is radically transformed from a centralised refrigerated liquid production system to a distributed system in which each cabinet can be optimised to minimise the system’s consumption.

In the humidification sector, CAREL focuses on adiabatic humidification, which allows the production of humidity using less energy compared to isothermal humidification. One related application is evaporative cooling, with more efficient temperature controls especially in air treatment applications.

Natural refrigerants

The effects of traditional refrigerants on the environment and their banning in some geographical areas has made it fundamental for CAREL to use low environmental impact natural refrigerants like propane (R290), carbon dioxide (R744) and ammonia (R717), sometimes in tandem with variable speed compressor technologies.

CAREL has focused on developing industrial and commercial refrigeration systems that can use natural refrigerants in each application niche served with its main compressor manufacturer partners in recent years.

Another area CAREL focuses on is that of solutions that use fewer refrigerants so as to decrease their cost and environmental impact like the HEOS system.

Monitoring and analysis of data and system optimisation

The new IoT division has allowed CAREL to concentrate on solutions that allow more evolved system optimisation solutions alongside the traditional monitoring of systems and alarm management. The system functioning data provide the energy managers with additional information about the system’s output.
It also allows for the assessment of any drops in performance which is essential to implement scheduled maintenance programmes.
CAREL also has system monitoring and optimisation services, where data from other similar systems are compared to align the performances of the less efficient systems with those of the best-performing systems.

System optimisation can also be coordinated using devices making up the system depending on its use, the environmental conditions or use of the system.

Introduction of an advanced control system in even the most simple cases allows significant savings in the machines’ and systems’ energy requirements thanks to functions like, for example, optimisation of switching on and off rather than using it only when strictly necessary.