The WE4CC-II project is a follow-up of the Climate KIC Pathfinder WE4CC project and  is part of the Climate KIC Sustainable City Systems Platform.


The aim is to connect stakeholders in low grade heat production (waste, solar) with water – air networks. Reuse of low grade heat or renewable heat for high quality water production and air conditioning can substantially reduce energy consumption and CO2 emissions. Using unexploited waste heat from cooling water can reduce electricity consumption by up to 50% relative to water production using fossil fuels. 


Waste heat is produced by a lot of processes that use energy. The biggest contributors to waste heat are industrial processes, domestic processes and energy production that occur in the urban environment. Often, this waste heat is lost to the ambient environment, contributing to a rise in global temperature. Storage and reuse of this waste heat contribute to improving energy efficiency and reduction of CO2 emissions in the city.


The WE4CC-II project has been testing the combination of technologies for using excess heat produced by industrial processes (e.g. electricity production) or specialized solar technologies such as Virtu® technology developed by Naked Energy Ltd. - that won the Venture Competition in October 2011 - in order to purify or desalinate water with the Memstill® technology developed by TNO. 

 The cascading heat from these processes is intended to be used for heating & cooling, by using the Absorberbox® technology developed by TU Berlin. The combination of Virtu® and Memstill® technologies has been evaluated in the lab, while a demonstrator of the Absorberbox® is running in the Berlin Botanic Gardens. 

A demonstrator of the Memstill® technology is now successfully evaluated at the Electrabel/Laborelec power plant in Belgium, capturing waste heat from the electricity production process and purifying surface water from a river near the site, in order to make high pressure boiler feed water.