According to a new future study by BP Energy Outlook, global energy demand is set to increase by up to 41% by 2035. This is primarily due to rising demand in emerging nations like China and India.

Chillers and air conditioners still make up a very large proportion of this total energy consumption; in Germany, for example, they account for around 15% of total end-use electricity consumption.

For this reason, there have long been efforts by governments to promote the procurement of energy-saving chillers. Adsorption chillers are now making an increasing contribution to improving the energy efficiency of chillers and air conditioners. German companies like InvenSor GmbH, with offices in Berlin and Lutherstadt Wittenberg, are pushing this development.

What’s unique about the multi-award-winning InvenSor chillers is that they are powered by waste heat rather than electricity. Additionally they also help the environment by using pure water as a refrigerant.

Thanks to its innovative products and increasing demand for efficient and environmentally friendly chillers and air conditioners, InvenSor has been continually expanding. The company reports that it has received more orders in the past six months alone than in the entire business year 2013. One reason for this success is that the chillers are conquering more and more areas of application: data centers, banks, schools, furniture stores, medical facilities, restaurants, and car dealerships, as well as communal buildings like government offices, are all kept cool with adsorption chillers. Another growing market segment are industrial applications such as food production, plastics processing, or electroplating.

InvenSor, whose chillers have received several awards, recorded its highest recent growth rates in these areas. A growing number of adsorption chillers are also powered by solar energy and being installed in warmer countries (for instance, in Italy and Spain).

Sören Paulußen, CEO of InvenSor GmbH, is satisfied with the company’s development. He said, “We’re seeing clear signs that there’s growing demand on the market for thermally powered chillers. There’s increased awareness among planners and installation companies. We are able to offer more and more attractive application options. We’ve been able to implement a series of exciting new projects at home and abroad in the past few months, especially in the area of industrial applications and solar cooling.”

Against the backdrop of growing demand, InvenSor GmbH has been increasing its sales team since the start of the year. The team is now been led by a new head of sales since June 2014: Hendrik Pilz combines specialist knowledge from his training as a utility engineer with many years of experience in distribution, and brings with him expertise in logistics and company structuring. Co-founder and shareholder Uwe Eckstein is now focusing on marketing and the development of new areas of business.

There is a wide variety of applications for adsorption chillers in the 5­100 kW range. In Germany, most InvenSor chillers are used in trigeneration installations. These systems provide electricity, heating and cooling through a clever combination of combined heat & power units (CHP) and adsorption chillers. The CHP units produce electricity and waste heat that can either be used directly for heating applications or for the chiller. Thanks to significantly lower CO2 emissions than conventional air conditioners, these systems protect the climate and environment.

“We are currently receiving a significant number of new orders from industrial companies, especially in the plastics processing industry where we are able to achieve very good annual operating hours of the chillers due to continuous operation of the processes, resulting in favourable payback time for the systems. It’s a very promising area of application for the future,” according to Niels Braunschweig, CEO and director of R&D at InvenSor.